[
    {
        "text": "Chiral perturbation theory and Bose-Einstein condensation in QCD: We present recent results in three-flavor chiral perturbation theory at\nfinite isospin $\\mu_I$ and strangeness $\\mu_s$ chemical potentials at zero\ntemperature. The phase diagram to ${\\cal O}(p^2)$ in the $\\mu_I$--$\\mu_S$ plane\nis mapped out with and without electromagnetic effects. The phase diagram\nconsists of a vacuum phase and three Bose-condensed phases with condensates of\n$\\pi^{\\pm}$, $K^{\\pm}$, and $K^{0}/\\bar{K}^0$, respectively. Including\nelectromagnetic interactions, the Bose-condensed phases become Higgs phases via\nthe Higgs mechanism. The tree-level spectrum for the mesons and gauge bosons is\nalso derived. We calculate the pressure, energy density, isospin density, and\nspeed of sound in the pion-condensed phase to ${\\cal O}(p^4)$ for three-flavor\n$\\chi$PT. The results are compared with recent lattice simulations and the\nagreement is very good for isospin chemical potentials up to approximately 200\nMeV. Moreover, by integrating out the $s$-quark, we show that the thermodynamic\nquantities can be mapped onto their two-flavor counterparts with renormalized\nparameters. %to ${\\cal O}(p^6)$ for two-flavor $\\chi$PT in the chiral limit. We\nalso consider the nonrelativistic limit. It is shown that the energy density\ncan be matched onto the classic result by Lee, Huang and Yang (LHY) for a\ndilute Bose, with an $s$-wave scattering length that includes radiative\ncorrections. The breaking of the $U(1)$ symmetry in the Bose-condensed phases\ngives rise to a Goldstone bosons, whose dispersion is linear for momenta\n$p\\ll\\mu_I$. In this regime, we use Son's prescription to construct an\neffective theory for the Goldstone field which is valid in this regime. It is\nshown that its damping rate is of order $p^5$. This result is in agreement with\nBeliav's for a dilute Bose gas.",
        "category": "hep"
    },
    {
        "text": "Further Results about Field Theory on the World Sheet and String\n  Formation: The present article is the continuation of the earlier work, which used the\nworld sheet representation and the mean field approximation to sum planar\ngraphs in massless phi^3 field theory. We improve on the previous work in two\nrespects: A prefactor in the world sheet propagator that had been neglected is\nnow taken into account. In addition, we introduce a non-zero bare mass for the\nfield phi. Working with a theory with cutoff, and using the mean field\napproximation, we find that, depending on the range of values of the mass and\ncoupling constant, the model has two phases: A string forming phase and a\nperturbative field theory phase. We also find the generation of a new degree of\nfreedom, which was not in the model originally. The new degree of freedom can\nbe thought of as the string slope, which is now promoted into a fluctuating\ndynamical variable. Finally, we show that the introduction of the bare mass\nmakes it possible to renormalize the model.",
        "category": "hep"
    },
    {
        "text": "An new order parameter with renormalized Polyakov loops: It is well established that physical quantities like the heavy quark\npotentials get temperature independent at sufficiently short distances. As a\nfirst application of this feature we suggest a new order parameter for the\nconfinement/deconfinement phase transition. Our investigations are based on\nrecent lattice studies.",
        "category": "hep"
    },
    {
        "text": "Possible Gauge Theoretic Origin for Quark-Lepton Complementarity: Similarity between the weak interaction properties of quarks and leptons has\nled to suggestions that the origin of lepton mixing angles may be related to\nthose of quarks. In this paper, we present a gauge model based on $SU(2)_L\n\\times SU(2)_R\\times SU(4)_c$ group that leads to a new form for the quark\nlepton complementarity which predicts the solar neutrino mixing angle in terms\nof the Cabibbo angle for the case of inverted mass hierarchy for neutrinos. We\nalso indicate how these ideas can be implemented in an $E_6$ inspired\ntrinification $SU(3)_C \\times SU(3)_L \\times SU(3)_R$ model, which is more\nclosely allied to string theory by the AdS/CFT correspondence.",
        "category": "hep"
    },
    {
        "text": "Computer modeling of production cross sections for beyond SM particles: In the paper is presented computer modelling of BSM physics, such as Dark\nmatter candidates, di-jet resonances and new Higgs bosons with the help of MCFM\nprogram.",
        "category": "hep"
    },
    {
        "text": "The Conformal-Symmetry--Color-Neutrality Connection in Strong\n  Interaction: The color neutrality of hadrons is interpreted as an expression of conformal\nsymmetry of strong interaction, the latter being signaled through the detected\n\"walking\" at low transferred momenta, $\\lim_{Q^2\\to 0}\\alpha_s(Q^2)/\\pi\\to 1 $,\nof the strong coupling toward a fixed value ($\\alpha_s $ \"freezing\" ). The fact\nis that conformal symmetry admits quarks and gluons to reside on the\ncompactified $AdS_5$ boundary, whose topology is $S^1\\times S^3$, a closed\nspace that can bear exclusively color-charge neutral configurations, precisely\nas required by color confinement. The compactification radius, once employed as\na second scale alongside with $\\Lambda_{QCD}$, provides for an $\\alpha_s(Q^2) $\n\"freezing\" mechanism in the infrared regime of QCD, thus making the\nconformal-symmetry--color-neutrality connection at low energies evident. In\nthis way, perturbative descriptions of processes in the infrared could acquire\nmeaning. In consequence, it becomes possible to address QCD by quantum\nmechanics in terms of a conformal wave operator equation, which leads to an\nefficient description of a wide range of",
        "category": "hep"
    },
    {
        "text": "The Color-Dual Fates of $F^3$, $R^3$, and $\\mathcal{N}=4$ Supergravity: We find that the duality between color and kinematics can be used to inform\nthe high energy behavior of effective field theories. Namely, we demonstrate\nthat the massless gauge theory of Yang-Mills deformed by a higher-derivative\n$F^3$ operator cannot be tree-level color-dual while consistently factorizing\nwithout a tower of additional four-point counterterms with rigidly fixed Wilson\ncoefficients that reaches to the ultraviolet (UV). We find through explicit\ncalculation a suggestive resummation, namely that their amplitudes are\nconsistent with the $\\alpha'$ expansion of those generated by the\n$(DF)^2+\\text{YM}$ theory, a known color-dual theory where the $F^2$ term has\nbeen given a mass squared proportional to $1 / \\alpha'$. As a result,\nconsidering consistent double-copy construction as a physical principle implies\nthat an $F^3$-based color-dual resolution of the UV divergence in\n$\\mathcal{N}=4$ supergravity comes at the cost of field-theoretic locality.\nSimilarly, when double-copying $F^3$ with itself, double-copy consistency lifts\n$R^3$ gravity to a family of gravity theories with an all-order tower of\nhigher-derivative corrections, which includes the closed bosonic string as a\nstandard adjoint-type double-copy.",
        "category": "hep"
    },
    {
        "text": "O(\u03b1_s^3) contributions to F_L^{Q\\bar{Q}}(x,Q^2) for large\n  virtualities: The $O(\\alpha_s^3)$ contributions to the heavy flavor Wilson coefficients for\nthe structure function $F_L(x,Q^2)$ are calculated in the region $Q^2 \\gg m^2$\nusing the renormalization group method.",
        "category": "hep"
    },
    {
        "text": "Lattice QCD determination of m_b, f_B and f_Bs with twisted mass Wilson\n  fermions: We present a lattice QCD determination of the b quark mass and of the B and\nB_s decay constants, performed with N_f=2 twisted mass Wilson fermions, by\nsimulating at four values of the lattice spacing. In order to study the b quark\non the lattice, two methods are adopted in the present work, respectively based\non suitable ratios with exactly known static limit and on the interpolation\nbetween relativistic data, evaluated in the charm mass region, and the static\npoint, obtained by simulating the HQET on the lattice. The two methods provide\nresults in good agreement. For the b quark mass in the MSbar scheme and for the\ndecay constants we obtain m_b(m_b)=4.29(14) GeV, f_B=195(12) MeV, f_Bs=232(10)\nMeV and f_Bs/f_B=1.19(5). As a byproduct of the analysis we also obtain the\nresults for the f_D and f_Ds decay constants: f_D=212(8) MeV, f_Ds=248(6) MeV\nand f_Ds/f_D=1.17(5).",
        "category": "hep"
    },
    {
        "text": "Probing Active-Sterile Neutrino Transition Magnetic Moments with Photon\n  Emission from CE$\u03bd$NS: In the presence of transition magnetic moments between active and sterile\nneutrinos, the search for a Primakoff upscattering process at coherent elastic\nneutrino-nucleus scattering (CE$\\nu$NS) experiments can provide stringent\nconstraints on the neutrino magnetic moment. We show that a radiative\nupscattering process with an emitted photon in the final state can induce a\nnovel coincidence signal at CE$\\nu$NS experiments that can also probe neutrino\ntransition magnetic moments beyond existing limits. Furthermore, the\ndifferential distributions for such a radiative mode can also potentially be\nsensitive to the Dirac vs. Majorana nature of the sterile state mediating the\nprocess. This can provide valuable insights into the nature and mass generation\nmechanism of the light active neutrinos.",
        "category": "hep"
    },
    {
        "text": "Nonlinear optical analogies in quantum electrodynamics: Some of the basic notions of nonlinear optics are summarized and then applied\nto the case of the Dirac vacuum, as described by the Heisenberg-Euler effective\none-loop Lagrangian. The theoretical and experimental basis for the appearance\nof nonlinear optical phenomena, such as the Kerr effect, Cotton-Mouton effect,\nand four-wave mixing are discussed. Further effects due to more exotic\nassumptions on the structure of spacetime, such as gravitational curvature and\nthe topology of the Casimir vacuum are also presented.",
        "category": "hep"
    },
    {
        "text": "Flux, Gaugino Condensation and Anti-Branes in Heterotic M-theory: We present the potential energy due to flux and gaugino condensation in\nheterotic M-theory compactifications with anti-branes in the vacuum. For\nreasons which we explain in detail, the contributions to the potential due to\nflux are not modified from those in supersymmetric contexts. The discussion of\ngaugino condensation is, however, changed by the presence of anti-branes. We\nshow how a careful microscopic analysis of the system allows us to use standard\nresults in supersymmetric gauge theory in describing such effects - despite the\nexplicit supersymmetry breaking which is present. Not surprisingly, the\nsignificant effect of anti-branes on the threshold corrections to the gauge\nkinetic functions greatly alters the potential energy terms arising from\ngaugino condensation.",
        "category": "hep"
    },
    {
        "text": "The Influence of Instantons on the Quark Propagator: We use over-improved stout-link smearing to investigate the presence and\nnature of instantons on the lattice. We find that smearing can remove\nshort-range effects with little damage to the long-range structure of the gauge\nfield, and that after around 50 sweeps this process is complete. There are more\nsignificant risks for very high levels of smearing beyond 100 sweeps. We are\nthus able to produce gauge configurations dominated by instanton effects. We\nthen calculate the overlap quark propagator on these configurations, and thus\nthe non-perturbative mass function. We find that smeared configurations\nreproduce the majority of dynamical mass generation, and conclude that\ninstantons are primarily responsible for the dynamical generation of mass.",
        "category": "hep"
    },
    {
        "text": "Electric dipole moments from spontaneous CP violation in SU(3)-flavoured\n  SUSY: The SUSY flavour problem is deeply related to the origin of flavour and hence\nto the origin of the SM Yukawa couplings themselves. Since all CP-violation in\nthe SM is restricted to the flavour sector, it is possible that the SUSY CP\nproblem is related to the origin of flavour as well. In this work, we present\nthree variations of an SU(3) flavour model with spontaneous CP violation. Such\nmodels explain the hierarchy in the fermion masses and mixings, and predict the\nstructure of the flavoured soft SUSY breaking terms. In such a situation, both\nSUSY flavour and CP problems do not exist. We use electric dipole moments and\nlepton flavour violation processes to distinguish between these models, and\nplace constraints on the SUSY parameter space.",
        "category": "hep"
    },
    {
        "text": "Driven black holes: from Kolmogorov scaling to turbulent wakes: General relativity governs the nonlinear dynamics of spacetime, including\nblack holes and their event horizons. We demonstrate that forced black hole\nhorizons exhibit statistically steady turbulent spacetime dynamics consistent\nwith Kolmogorov's theory of 1941. As a proof of principle we focus on black\nholes in asymptotically anti-de Sitter spacetimes in a large number of\ndimensions, where greater analytic control is gained. We also demonstrate that\ntidal deformations of the horizon induce turbulent dynamics. When set in motion\nrelative to the horizon a deformation develops a turbulent spacetime wake,\nindicating that turbulent spacetime dynamics may play a role in binary mergers\nand other strong-field phenomena.",
        "category": "hep"
    },
    {
        "text": "Chiral phase structure and critical end point in QCD: We map out the QCD phase structure at finite temperature and chemical\npotential for 2-flavour and 2 + 1-flavour QCD. This is done within a\ngeneralised functional approach to QCD put forward in arXiv:2002.07500\n[hep-ph]. Specifically we compute the quark propagator and the\nfinite-temperature and density fluctuations of the gluon propagator and the\nquark-gluon vertex on the basis of precision data for vacuum correlation\nfunctions. The novel ingredient is the direct self-consistent computation of\nthe DSEs for the dressings of the quark-gluon vertex, in contrast to the common\nuse of STI-inspired vertices.\n  For small densities the results for the chiral order parameter agree with the\nrespective lattice and functional renormalisation group results, for large\ndensities the present results are in a quantitative agreement with the latter,\nincluding the location of the critical end point.",
        "category": "hep"
    },
    {
        "text": "Transverse momentum distributions of quarks in the nucleon from the\n  Chiral Quark Soliton Model: We report the first calculation of the simplest but most fundamental\ntransverse momentum dependent (TMD) distribution of quarks in the nucleon, i.e.\nthe time-reversal-even unpolarized TMD quark and antiquark distribution with\nisoscalar combination, within the framework of the chiral quark soliton model.\nThe nonperturbative account of the deformed Dirac-sea quarks within the\ntheoretical scheme enables us to make a reliable predictions not only for the\nquark distribution but also for the antiquark distribution. We found that the\npredicted average transverse momentum square $<k_\\perp^2>$ of quarks and\nantiquarks depends strongly on their longitudinal momentum fraction $x$, which\nmeans that the frequently used assumption of factorization in $x$ and $k_\\perp$\nis significantly violated. It is also found, somewhat unexpectedly, that the\naverage transverse momentum square of antiquarks is considerably larger than\nthat of quarks.",
        "category": "hep"
    },
    {
        "text": "Direct Deflection of Particle Dark Matter: We propose a new strategy to directly detect light particle dark matter that\nhas long-ranged interactions with ordinary matter. The approach involves\ndistorting the local flow of dark matter with time-varying fields and measuring\nthese distortions with shielded resonant detectors. We apply this idea to\nsub-MeV dark matter particles with very small electric charges or coupled to a\nlight vector mediator, including the freeze-in parameter space targeted by low\nmass direct detection efforts. This approach can probe dark matter masses\nranging from 10 MeV to below a meV, extending beyond the capabilities of\nexisting and proposed direct detection experiments.",
        "category": "hep"
    },
    {
        "text": "Hawking radiation as tunneling from the Kerr and Kerr-Newman black holes: Recent work, which treats the Hawking radiation as a semi-classical tunneling\nprocess at the horizon of the Schwarzschild and Reissner-Nordstrom spacetimes,\nindicates that the exact radiant spectrum is no longer pure thermal after\nconsidering the black hole background as dynamical and the conservation of\nenergy. In this paper, we extend the method to investigate Hawking radiation as\nmassless particles tunneling across the event horizon of the Kerr black hole\nand that of charged particles from the Kerr-Newman black hole by taking into\naccount the energy conservation, the angular momentum conservation, and the\nelectric charge conservation. Our results show that when self-gravitation is\nconsidered, the tunneling rate is related to the change of Bekenstein-Hawking\nentropy and the derived emission spectrum deviates from the pure thermal\nspectrum, but is consistent with an underlying unitary theory.",
        "category": "hep"
    },
    {
        "text": "A Note on Boltzmann Brains: Understanding the observed arrow of time is equivalent, under general\nassumptions, to explaining why Boltzmann brains do not overwhelm ordinary\nobservers. It is usually thought that this provides a condition on the decay\nrate of every cosmologically accessible de Sitter vacuum, and that this\ncondition is determined by the production rate of Boltzmann brains calculated\nusing semiclassical theory built on each such vacuum. We argue, based on a\nrecently developed picture of microscopic quantum gravitational degrees of\nfreedom, that this thinking needs to be modified. In particular, depending on\nthe structure of the fundamental theory, the decay rate of a de Sitter vacuum\nmay not have to satisfy any condition except for the one imposed by the\nPoincare recurrence. The framework discussed here also addresses the question\nof whether a Minkowski vacuum may produce Boltzmann brains.",
        "category": "hep"
    },
    {
        "text": "Anomaly-Free Gauged R-Symmetry: We review the gauging of an R-symmetry in local and global susy. We then\nconstruct the first anomaly-free models. We break the R-symmetry and susy at\nthe Planck scale and discuss the low-energy effects. We include a solution to\nthe mu-problem, and the prediction of observable effects at HERA. The models\nalso nicely allow for GUT-scale baryogenesis and R-parity violation without the\nsphaleron interactions erasing the baryon-asymmetry.",
        "category": "hep"
    },
    {
        "text": "Inclusive Nucleon Decay Searches as a Frontier of Baryon Number\n  Violation: Proton decay, and the decay of nucleons in general, constitutes one of the\nmost sensitive probes of high-scale physics beyond the Standard Model. Most of\nthe existing nucleon decay searches have focused primarily on two-body decay\nchannels, motivated by Grand Unified Theories and supersymmetry. However, many\nhigher-dimensional operators violating baryon number by one unit, $\\Delta B =\n1$, induce multi-body nucleon decay channels, which have been only weakly\nconstrained thus far. While direct searches for all such possible channels are\ndesirable, they are highly impractical. In light of this, we argue that\ninclusive nucleon decay searches, $N \\rightarrow X +$anything (where $X$ is a\nlight Standard Model particle with an unknown energy distribution), are\nparticularly valuable, as are model-independent and invisible nucleon decay\nsearches such as $n \\rightarrow$ invisible. We comment on complementarity and\nopportunities for such searches in the current as well as upcoming large-scale\nexperiments Super-Kamiokande, Hyper-Kamiokande, JUNO, and DUNE. Similar\narguments apply to $\\Delta B >1$ processes, which kinematically allow for even\nmore involved final states and are essentially unexplored experimentally.",
        "category": "hep"
    },
    {
        "text": "Measurement of the mass of the $\u03c4$-lepton and an upper limit on the\n  mass difference between $\u03c4^+$ and $\u03c4^-$: The mass of the $\\tau$-lepton has been measured in the decay modes $\\tau \\to\n3\\pi \\nu_\\tau$ and $\\tau \\to 3\\pi \\pi^0\\nu_\\tau$ using a pseudomass technique.\nThe preliminary result is $1776.71\\pm 0.25 {(stat)} \\pm 0.62 {(syst)}$ MeV. The\npreliminary value of an upper limit on the relative mass difference between\npositive and negative $\\tau$ leptons is\n$|(M_{\\tau^+}-M_{\\tau^-})|/M_{\\mathrm{average}}$ is $5.0 \\times 10^{-4}$ at 90%\nCL.",
        "category": "hep"
    },
    {
        "text": "On current contribution to Fronsdal equations: We explore a local form of second-order Vasiliev equations proposed in\n[arXiv:1706.03718] and obtain an explicit expression for quadratic corrections\nto bosonic Fronsdal equations, generated by gauge-invariant higher-spin\ncurrents. Our analysis is performed for general phase factor, and for the case\nof parity-invariant theory we find the agreement with expressions for cubic\nvertices available in the literature. This provides an additional indication\nthat field redefinition proposed in [arXiv:1706.03718] is the proper one.",
        "category": "hep"
    },
    {
        "text": "Thermal Field Theory in Non-Equilibrium States: Conventional transport theory is not really applicable to non-equilibrium\nsystems which exhibit strong quantum effects. We present two different\napproaches to overcome this problem. Firstly we point out how transport\nequations may be derived that incorporate a nontrivial spectral function as a\ntypical quantum effect, and test this approach in a toy model of a strongly\ninteracting degenerate plasma. Secondly we explore a path to include\nnon-equilibrium effects into quantum field theory through momentum mixing\ntransformations in Fock space. Although the two approaches are completely\northogonal, they lead to the same coherent conclusion.",
        "category": "hep"
    },
    {
        "text": "Three-point correlators for giant magnons: Three-point correlation functions in the strong-coupling regime of the\nAdS/CFT correspondence can be analyzed within a semiclassical approximation\nwhen two of the vertex operators correspond to heavy string states having large\nquantum numbers while the third vertex corresponds to a light state with fixed\ncharges. We consider the case where the heavy string states are chosen to be\ngiant magnon solitons with either a single or two different angular momenta,\nfor various different choices of light string states.",
        "category": "hep"
    },
    {
        "text": "Charm mixing and CPV: In these proceedings, recent results on time-dependent and time-integrated\nmeasurements of $C\\!P$ violation and of meson mixing in the charm sector are\npresented, including the first observation of $C\\!P$ violation in the charm\nsystem.",
        "category": "hep"
    },
    {
        "text": "Postmodern String Theory: Stochastic Formulation: In this paper we study the dynamics of a statistical ensemble of strings,\nbuilding on a recently proposed gauge theory of the string geodesic field. We\nshow that this stochastic approach is equivalent to the Carath\\'eodory\nformulation of the Nambu-Goto action, supplemented by an averaging procedure\nover the family of classical string world-sheets which are solutions of the\nequation of motion. In this new framework, the string geodesic field is\nreinterpreted as the Gibbs current density associated with the string\nstatistical ensemble. Next, we show that the classical field equations derived\nfrom the string gauge action, can be obtained as the semi-classical limit of\nthe string functional wave equation. For closed strings, the wave equation\nitself is completely analogous to the Wheeler-DeWitt equation used in quantum\ncosmology. Thus, in the string case, the wave function has support on the space\nof all possible spatial loop configurations. Finally, we show that the string\ndistribution induces a multi-phase, or {\\it cellular} structure on the\nspacetime manifold characterized by domains with a purely Riemannian geometry\nseparated by domain walls over which there exists a predominantly Weyl\ngeometry.",
        "category": "hep"
    },
    {
        "text": "A Fresh Look at the Calculation of Tunneling Actions: An alternative approach to the calculation of tunneling actions, that control\nthe exponential suppression of the decay of metastable phases, is presented.\nThe new method circumvents the use of bounces in Euclidean space by introducing\nan auxiliary function, a tunneling potential $V_t$ that connects smoothly the\nmetastable and stable phases of the field potential $V$. The tunneling action\nis obtained as the integral in field space of an action density that is a\nsimple function of $V_t$ and $V$. This compact expression can be considered as\na generalization of the thin-wall action to arbitrary potentials and allows a\nfast numerical evaluation with a precision below the percent level for typical\npotentials. The method can also be used to generate potentials with analytic\ntunneling solutions.",
        "category": "hep"
    },
    {
        "text": "Axion decay $a \\to f \\tilde f$ in a strong magnetic field: The axion decay into charged fermion-antifermion pair $a ~\\to f ~\\tilde f$ is\nstudied in external crossed and magnetic fields. The result we have obtained\ncan be of use to re-examine the lower limit on the axion mass in case of\npossible existence of strong magnetic fields at the early Universe stage.",
        "category": "hep"
    },
    {
        "text": "Radial coordinates for defect CFTs: We study the two-point function of local operators in the presence of a\ndefect in a generic conformal field theory. We define two pairs of cross\nratios, which are convenient in the analysis of the OPE in the bulk and defect\nchannel respectively. The new coordinates have a simple geometric\ninterpretation, which can be exploited to efficiently compute conformal blocks\nin a power expansion. We illustrate this fact in the case of scalar external\noperators. We also elucidate the convergence properties of the bulk and defect\nOPE decompositions of the two-point function. In particular, we remark that the\nexpansion of the two-point function in powers of the new cross ratios converges\neverywhere, a property not shared by the cross ratios customarily used in\ndefect CFT. We comment on the crucial relevance of this fact for the numerical\nbootstrap.",
        "category": "hep"
    },
    {
        "text": "Relieving String Tension By Making Baby Universes in a Dynamical String\n  Tension Braneworld Model: String tension fundamentally determines the properties of strings; yet its\nvalue is often assigned arbitrarily, creating a fine-tuning problem. We\ndescribe a mechanism for dynamically generating string tension in a flat or\nalmost flat spacetime, using the modified measures formalism, which in turn\nnaturally generates a new type of stringy brane-world scenario. Such a scenario\nallows strings to achieve near infinite tension confining the strings to two\nvery close expanding surfaces, but the infinite tensions also threatens to\ndistort the near-flat embedding spacetime through large back reactions. We\nargue that this danger can be neutralised via the creation of a baby universe,\na growing region of emdedding spacetime that divorces from the ambient\nembedding spacetime, while our universe is still a brane separating two nearly\nflat spacetimes. The avoidance of a minimum length and a maximum Hagedorn\ntemperature in the context of dynamical string tension generation are also\ndiscussed.",
        "category": "hep"
    },
    {
        "text": "Pion Parton Distributions in a non local Lagrangian: We use phenomenological nonlocal Lagrangians, which lead to non trivial forms\nfor the quark propagator, to describe the pion. We define a procedure, based on\nthe Dyson-Schwinger equations, for the calculation of the pion parton\ndistributions at low Q^2. The obtained parton distributions fulfill all the\nwishful properties. Using a convolution approach we incorporate the composite\ncharacter of the constituent quarks in the formalism. We evolve, using the\nRenormalization Group, the calculated parton distributions to the experimental\nscale and compare favorably with the data and draw conclusions.",
        "category": "hep"
    },
    {
        "text": "Non-relativistic pair annihilation of nearly mass degenerate neutralinos\n  and charginos II. P-wave and next-to-next-to-leading order S-wave\n  coefficients: This paper is a continuation of an earlier work (arXiv:1210.7928) which\ncomputed analytically the tree-level annihilation rates of a collection of\nnon-relativistic neutralino and chargino two-particle states in the general\nMSSM. Here we extend the results by providing the next-to-next-to-leading order\ncorrections to the rates in the non-relativistic expansion in momenta and mass\ndifferences, which include leading P-wave effects, in analytic form. The\nresults are a necessary input for the calculation of the Sommerfeld-enhanced\ndark matter annihilation rates including short-distance corrections at\nnext-to-next-to-leading order in the non-relativistic expansion in the general\nMSSM with neutralino LSP.",
        "category": "hep"
    },
    {
        "text": "Constraints on a long-range spin-independent interaction from precision\n  atomic physics: Constraints on a spin-independent interaction by exchange of a neutral light\nboson are derived from precision data on the electron anomalous magnetic moment\nand from atomic spectroscopy of hydrogen and deuterium atoms. The mass range\nfrom $1 $eV$/c^2$ to $1 $Mev$/c^2$ is studied and the effective coupling\nconstant $\\alpha^\\prime$ is allowed below the level of $10^{-11} - 10^{-13}$\ndepending on the value of the boson mass. The mass range corresponds to the\nYukawa radius from 0.0002 nm to 20 nm, which covers the distances far above and\nfar below the Bohr radius of the hydrogen atom.",
        "category": "hep"
    },
    {
        "text": "Duality, Multi-Monopole Dynamics & Quantum Threshold Bound States: Dynamics of many supersymmetric monopoles are studied in the low energy\napproximation. A conjecture for the exact moduli space metric is given for all\ncollections of fundamental monopoles of distinct type, and various partial\nconfirmations of the conjecture are discussed. Upon the quantization of the\nresulting multi-monopole dynamics in the context of $N=4$ supersymmetric\nYang-Mills-Higgs theories, one recovers the missing magnetic states that are\ndual to some of the massive vector mesons. A generalization to monopoles with\nnonabelian charges is also discussed.",
        "category": "hep"
    },
    {
        "text": "The CMSSM Parameter Space at Large tan beta: We extend previous combinations of LEP and cosmological relic density\nconstraints on the parameter space of the constrained MSSM, with universal\ninput supersymmetry-breaking parameters, to large tan beta. We take account of\nthe possibility that the lightest Higgs boson might weigh about 115 GeV, but\nalso retain the possibility that it might be heavier. We include the most\nrecent implementation of the b to s gamma constraint at large tan beta. We\nrefine previous relic density calculations at large tan beta by combining a\ncareful treatment of the direct-channel Higgs poles in annihilation of pairs of\nneutralinos chi with a complete treatment of chi - stau coannihilation, and\ndiscuss carefully uncertainties associated with the mass of the b quark. We\nfind that coannihilation and pole annihilations allow the CMSSM to yield an\nacceptable relic density at large tan beta, but it is consistent with all the\nconstraints only if m_chi > 140 (180) GeV for mu > 0 (mu < 0) for our default\nchoices m_b(m_b) = 4.25 GeV, m_t = 175 GeV, and A_0 = 0.",
        "category": "hep"
    },
    {
        "text": "Asymptotic symmetries and dynamics of three-dimensional flat\n  supergravity: A consistent set of asymptotic conditions for the simplest supergravity\ntheory without cosmological constant in three dimensions is proposed. The\ncanonical generators associated to the asymptotic symmetries are shown to span\na supersymmetric extension of the BMS$_3$ algebra with an appropriate central\ncharge. The energy is manifestly bounded from below with the ground state given\nby the null orbifold or Minkowski spacetime for periodic, respectively\nantiperiodic boundary conditions on the gravitino. These results are related to\nthe corresponding ones in AdS$_3$ supergravity by a suitable flat limit. The\nanalysis is generalized to the case of minimal flat supergravity with\nadditional parity odd terms for which the Poisson algebra of canonical\ngenerators form a representation of the super-BMS$_3$ algebra with an\nadditional central charge.",
        "category": "hep"
    },
    {
        "text": "An upper limit on CP violation in the $B^0_s-\\bar{B}^0_s$ system: In a previous publication we noted that the time dependence of an incoherent\n$B^0-\\bar{B}^0$ mixture undergoes a qualitative change when the magnitude of CP\nviolation $\\delta$ exceeds a critical value. Requiring, on physical grounds,\nthat the system evolve from an initial incoherent state to a final pure state\nin a monotonic way, yields a new upper limit for $\\delta$. The recent\nmeasurement of the wrong charge semileptonic asymmetry of $B_s^0$ mesons\npresented by the D0 collaboration is outside this bound by one standard\ndeviation. If this result is confirmed it implies the existence of a new\nquantum mechanical oscillation phenomenon.",
        "category": "hep"
    },
    {
        "text": "'Fat-brane' Universal Extra Dimension model confronted with the ATLAS\n  multi-jet and photonic searches at 13 TeV LHC: The current status of `fat-brane' minimal Universal Extra Dimensions\n(fat-mUED) is studied in the light of ATLAS experiment's recent reports. At the\nLarge Hadron Collider (LHC) color charged first level Kaluza-Klein (KK)\nparticles (first level excited quarks and gluons) can be abundantly\npair-produced due to conserved quantity, viz., KK-parity, and strong\ninteraction. The cascade decay of these particles to one or more Standard Model\n(SM) particle(s) and lighter first level KK particle(s) stops after producing\nthe lightest excited massive state, named as the lightest KK particle (LKP).\nWith the presence of gravity induced decays, stability of the LKP is lost and\nit may decay to photon or Z-boson by radiating KK-excited gravitons, hence\nleading to final state with photon(s) at the LHC. A variant signal topology is\nestablished when pair-produced first level colored KK particles undergo direct\ndecay to an associated SM partner along with KK-excitations of graviton; thus\nleading to a signal with two hard jets and substantial missing energy. The\nATLAS experiment lately reported two searches at 13 TeV LHC with 139\ninverse-femtobarn of data; (i) multi-jet and (ii) photon and jets with missing\nenergy. In both searches, the results showed no substantial deviation from the\nnumber of background events of the SM. Provided the absence of any number of\nexcess events in both searches we constrained the parameters of the fat-mUED\nmodel, viz., the higher-dimensional Planck mass and the compactification scale.",
        "category": "hep"
    },
    {
        "text": "Identification techniques for highly boosted W bosons that decay into\n  hadrons: In searches for new physics in the energy regime of the LHC, it is becoming\nincreasingly important to distinguish single-jet objects that originate from\nthe merging of the decay products of W bosons produced with high transverse\nmomenta from jets initiated by single partons. Algorithms are defined to\nidentify such W jets for different signals of interest, using techniques that\nare also applicable to other decays of bosons to hadrons that result in a\nsingle jet, such as those from highly boosted Z and Higgs bosons. The\nefficiency for tagging W jets is measured in data collected with the CMS\ndetector at a center-of-mass energy of 8 TeV, corresponding to an integrated\nluminosity of 19.7 inverse femtobarns. The performance of W tagging in data is\ncompared with predictions from several Monte Carlo simulators.",
        "category": "hep"
    },
    {
        "text": "Doubled Conformal Compactification: We use Weyl transformations between the Minkowski spacetime and dS/AdS\nspacetime to show that one cannot well define the electrodynamics globally on\nthe ordinary conformal compactification of the Minkowski spacetime (or dS/AdS\nspacetime), where the electromagnetic field has a sign factor (and thus is\ndiscountinuous) at the light cone. This problem is intuitively and clearly\nshown by the Penrose diagrams, from which one may find the remedy without too\nmuch difficulty. We use the Minkowski and dS spacetimes together to cover the\ncompactified space, which in fact leads to the doubled conformal\ncompactification. On this doubled conformal compactification, we obtain the\nglobally well-defined electrodynamics.",
        "category": "hep"
    },
    {
        "text": "Coherent photon-hadron interactions in pA collisions: Small-x physics\n  after HERA: In this letter we study the photoproduction of heavy quarks and vector mesons\nin the coherent proton-nucleus (pA) interactions for RHIC and LHC energies and\nanalyze if these processes can be used to determine the QCD dynamics at high\nenergies. The integrated cross section and rapidity distribution are estimated\nusing the Color Glass Condensate (CGC) formalism. A comparison with the linear\ndynamics predictions is also presented. Our results indicate that the nonlinear\ndynamics can be proven in those reactions, which are well suited for studing\nsaturation effects.",
        "category": "hep"
    },
    {
        "text": "Calculation of fermionic two-loop contributions to muon decay: The computation of the correction \\Delta r in the W-Z mass correlation,\nderived from muon decay, is described at the two-loop level in the Standard\nModel. Technical aspects which become relevant at this level are studied, e.g.\ngauge-parameter independent mass renormalization, ghost-sector renormalization\nand the treatment of \\gamma_5. Exact results for \\Delta r and the W mass\nprediction including O(\\alpha^2) corrections with fermion loops are presented\nand compared with previous results of a next-to-leading order expansion in the\ntop-quark mass.",
        "category": "hep"
    },
    {
        "text": "Integral solutions to the one-loop renormalization-group equations for\n  lepton flavor mixing parameters and the Jarlskog invariant: Working in the basis where the charged-lepton Yukawa matrix is diagonal and\nmaking the $\\tau$-dominance approximations, we analytically derive integral\nsolutions to the one-loop renormalization-group equations (RGEs) for neutrino\nmasses, flavor mixing angles, CP-violating phases and the Jarlskog invariant\nunder the standard parametrization of the PMNS matrix in the standard model or\nits minimal supersymmetric extension for both Majorana and Dirac neutrinos.\nWith these integral solutions, we carry out numerical calculations to\ninvestigate the RGE running of lepton flavor mixing parameters and the Jarlskog\ninvariant, and also compare these integral solutions with the exact results\nobtained by numerically solving the one-loop RGEs. It is shown that these\nintegral solutions coincide with the exact results and can well describe the\nevolution of lepton flavor mixing parameters and the Jarlskog invariant in most\ncases. Some important features of our integral solutions and the evolution\nbehaviors of relevant flavor parameters are also discussed in detail both\nanalytically and numerically.",
        "category": "hep"
    },
    {
        "text": "Asymptotic Regimes in Quantum Gravity at Large Distances and Running\n  Newtonian and Cosmological Constants: We consider a multiplicatively renormalizable higher-derivative scalar theory\nwhich is used as an effective theory for quantum gravity at large distances\n(infrared phase of quantum gravity). The asymptotic regimes (in particular, the\nasymptotically free infrared regime) for the coupling constants ---specifically\nthe Newtonian and the cosmological constant--- are obtained. The running of the\nNewton and cosmological constants in the infrared asymptotically free regime\nmay be relevant for solving the cosmological constant problem and for\nestimating the leading-log corrections to the static gravitational potential.",
        "category": "hep"
    },
    {
        "text": "Postcards from oases in the desert: phenomenology of SUSY with\n  intermediate scales: The presence of new matter fields charged under the Standard Model gauge\ngroup at intermediate scales below the Grand Unification scale modifies the\nrenormalization group evolution of the gauge couplings. This can in turn\nsignificantly change the running of the Minimal Supersymmetric Standard Model\nparameters, in particular the gaugino and the scalar masses. In the absence of\nnew large Yukawa couplings we can parameterise all the intermediate scale\nmodels in terms of only two parameters controlling the size of the unified\ngauge coupling. As a consequence of the modified running, the low energy\nspectrum can be strongly affected with interesting phenomenological\nconsequences. In particular, we show that scalar over gaugino mass ratios tend\nto increase and the regions of the parameter space with neutralino Dark Matter\ncompatible with cosmological observations get drastically modified. Moreover,\nwe discuss some observables that can be used to test the intermediate scale\nphysics at the LHC in a wide class of models.",
        "category": "hep"
    },
    {
        "text": "Many Phases of Generalized 3D Instanton Crystals: Nuclear matter at large number of colors is necessarily in a solid phase. In\nparticular holographic nuclear matter takes the form of a crystal of instantons\nof the flavor group. In this article we initiate the analysis of the\nthree-dimensional crystal structures and the orientation patterns for the\ntwo-body potential that follows from holographic duality. The outcome of the\nanalysis includes several unexpected results. We perform simulations of\nensembles of O(10000) instantons whereby we identify the lattice structure and\norientations for the different values of the weight factors of the non-Abelian\norientation terms in the two-body potential. The resulting phase diagram is\nsurprisingly complex, including a variety of ferromagnetic and\nantiferromagnetic crystals with various global orientation patterns, and\nvarious \"non-Abelian\" crystals where orientations have no preferred direction.\nThe latter include variants of face-centered-cubic, hexagonal, and simple cubic\ncrystals which may have remarkably large or small aspect ratios. The simulation\nresults are augmented by analytic analysis of the long-distance divergences,\nand numerical computation of the (divergence free) energy differences between\nthe non-Abelian crystals, which allows us to precisely determine the structure\nof the phase diagram.",
        "category": "hep"
    },
    {
        "text": "One-loop beta-functions for renormalisable gravity: We compute the one-loop beta-functions for renormalisable quantum gravity\ncoupled to scalars using the co-ordinate space approach and generalised\nSchwinger De Witt technique. We resolve apparent contradictions with the\ncorresponding momentum space calculations, and indicate how our results also\nresolve similar inconsistencies in the fermion case.",
        "category": "hep"
    },
    {
        "text": "The Sudakov form factor to three loops in N=4 super Yang-Mills: We review the results for the Sudakov form factor in N=4 super Yang-Mills\ntheory up to the three-loop level. At each loop order, the form factor is\nexpressed as a linear combination of only a handful scalar integrals, with\nsmall integer coefficients. Working in dimensional regularisation, the\nexpansion coefficients of each integral exhibit homogeneous transcendentality\nin the Riemann zeta-function. We find that the logarithm of the form factor\nreproduces the correct values of the cusp and collinear anomalous dimensions.\nMoreover, the form factor in N=4 super Yang-Mills can be related to the leading\ntranscendentality pieces of the QCD quark and gluon form factor. Finally, we\ncomment briefly on the ultraviolet properties of the N=4 form factor in D>4\ndimensions.",
        "category": "hep"
    },
    {
        "text": "Implications of a new light gauge boson for neutrino physics: We study the impact of light gauge bosons on neutrino physics. We show that\nthey can explain the NuTeV anomaly and also escape the constraints from\nneutrino experiments if they are very weakly coupled and have a mass of a few\nGeV. Lighter gauge bosons with stronger couplings could explain both the NuTeV\nanomaly and the positive anomalous magnetic moment of the muon. However, in the\nsimple model we consider in this paper (say a purely vectorial extra U(1)\ncurrent), they appear to be in conflict with the precise measurements of \\nu-e\nelastic scattering cross sections. The surprising agreement that we obtain\nbetween our naive model and the NuTeV anomaly for a Z' mass of a few GeV may be\na coincidence. However, we think it is interesting enough to deserve attention\nand perhaps a more careful analysis, especially since a new light gauge boson\nis a very important ingredient for the Light Dark Matter scenario.",
        "category": "hep"
    },
    {
        "text": "Nuclear Effects in the F_3 Structure Function: We discuss nuclear effects in the structure function F_3 measured in neutrino\ndeep-inelastic scattering on heavy nuclear targets.",
        "category": "hep"
    },
    {
        "text": "The O(N) linear sigma model at finite temperature beyond the Hartree\n  approximation: We study the O(N) linear sigma model with spontaneous symmetry breaking,\nusing a Hartree-like ansatz with a classical field and variational masses. We\ngo beyond the Hartree approximation by including the two-loop contribution, the\nsunset diagram, using the 2PPI expansion. We have computed numerically the\neffective potential at finite temperature. We find a phase transition of second\norder, while it is first order in the Hartree approximation. We also discuss\nsome implications of the fact that in this order, the decay of the sigma into\ntwo pions affects the thermal diagrams.",
        "category": "hep"
    },
    {
        "text": "Dynamical symmetry breaking in Nambu-Jona-Lasinio model under the\n  influence of external electromagnetic and gravitational fields: Dynamical symmetry breaking is investigated for a four-fermion\nNambu-Jona-Lasinio model in external electromagnetic and gravitational fields.\nAn effective potential is calculated in the leading order of the large-N\nexpansion using the proper-time Schwinger formalism.\n  Phase transitions accompanying a chiral symmetry breaking in the\nNambu-Jona-Lasinio model are studied in detail. A magnetic calalysis phenomenon\nis shown to exist in curved spacetime but it turns out to lose its universal\ncharacter because the chiral symmetry is restored above some critical positive\nvalue of the spacetime curvature.",
        "category": "hep"
    },
    {
        "text": "Hints from Tevatron, a prelude to what?: We comment on the recent results from the Tevatron experiments in the W+jets\nchannel and consider some models as the possible underlying physical theories.\nWe also list some channels for further studies.",
        "category": "hep"
    },
    {
        "text": "Multiparameter Integrable QFT's with N bosons: We introduce a new family of integrable theories with $N$ bosons and $N$\nfreely adjustable mass parameters. These theories restrict in particular limits\nto the ``generalized supersymmetric'' sine-Gordon models, as well as to the\nflavor anisotropic chiral Gross Neveu models (studied recently by N. Andrei and\ncollaborators). The scattering theory involves scalar particles that are no\nbound states, and bears an intriguing resemblance wih the results of a sharp\ncut-off analysis of the Thirring model carried out by Korepin in (1980).\nVarious physical applications are discussed. In particular, we demonstrate that\nour theories are the appropriate continuum limit of integrable quantum spin\nchains with mixtures of spins.",
        "category": "hep"
    },
    {
        "text": "Volume independence for Yang-Mills fields on the twisted torus: We review some recent results related to the notion of volume independence in\nSU(N) Yang-Mills theories. The topic is discussed in the context of gauge\ntheories living on a d-dimensional torus with twisted boundary conditions.\nAfter a brief introduction reviewing the formalism for introducing gauge fields\non a torus, we discuss how volume independence arises in perturbation theory.\nWe show how, for appropriately chosen twist tensors, perturbative results to\nall orders in the 't Hooft coupling depend on a specific combination of the\nrank of the gauge group (N) and the periods of the torus (l) given by l\nN^{2/d}, for d even.We discuss the well-known relation to non-commutative field\ntheories and address certain threats to volume independence associated to the\noccurrence of tachyonic instabilities at one-loop order. We end by presenting\nsome numerical results in 2+1 dimensions that extend these ideas to the\nnon-perturbative domain.",
        "category": "hep"
    },
    {
        "text": "On curvature coupling and quintessence fine-tuning: We discuss the phenomenological model in which the potential energy of the\nquintessence field depends linearly on the energy density of the spatial\ncurvature. We find that the pressure of the scalar field takes a different form\nwhen the potential of the scalar field also depends on the scale factor and the\nenergy momentum tensor of the scalar field can be expressed as the form of a\nperfect fluid. A general coupling was proposed to explain the current\naccelerating expansion of the Universe and solve the fine-tuning problem.",
        "category": "hep"
    },
    {
        "text": "A 3.55 keV Line from Exciting Dark Matter without a Hidden Sector: Models in which dark matter particles can scatter into a slightly heavier\nstate which promptly decays to the lighter state and a photon (known as\neXciting Dark Matter, or XDM) have been shown to be capable of generating the\n3.55 keV line observed from galaxy clusters, while suppressing the flux of such\na line from smaller halos, including dwarf galaxies. In most of the XDM models\ndiscussed in the literature, this up-scattering is mediated by a new light\nparticle, and dark matter annihilations proceed into pairs of this same light\nstate. In these models, the dark matter and mediator effectively reside within\na hidden sector, without sizable couplings to the Standard Model. In this\npaper, we explore a model of XDM that does not include a hidden sector.\nInstead, the dark matter both up-scatters and annihilates through the near\nresonant exchange of a $\\mathcal{O}(10^2)$ GeV pseudoscalar with large Yukawa\ncouplings to the dark matter and smaller, but non-neglibile, couplings to\nStandard Model fermions. The dark matter and the mediator are each mixtures of\nStandard Model singlets and $SU(2)_W$ doublets. We identify parameter space in\nwhich this model can simultaneously generate the 3.55 keV line and the\ngamma-ray excess observed from the Galactic Center, without conflicting with\nconstraints from colliders, direct detection experiments, or observations of\ndwarf galaxies.",
        "category": "hep"
    },
    {
        "text": "Anisotropic Improved Actions: The studies of the quantum corrections for the anisotropy\nparameter,$\\eta(=\\xi_R/\\xi_B)$, for the improved actions, $\\beta (C_0\nL({Plaq.}) + C_1 L({Rect.}))$, are proceeded in the medium to strong coupling\nregion on anisotropic lattices. The global features for the $\\eta$ parameters\nas a function of $\\beta$ and the coefficient $C_{1}$ have been clarified. It\nhas been found by the perturbative analysis that as $C_1$ decreases, the slope\nof the $\\eta(\\beta)$ becomes less steep and for the actions whose $C_{1}$ is\nless than -0.160, $\\eta$ decreases as $\\beta$ decreases, contrary to the case\nof the standard action. In the medium to strong coupling region, the $\\eta$\nparameter begins to increase as $\\beta$ decreases for all $C_{1}$. This means\nthat for the actions with $C_{1} < -0.160$, the one-loop perturbative results\nfor $\\eta$ break down qualitatively and the $\\eta$ parameters have a dip. As a\nresult of this dip structure the $\\eta$ for Iwasaki's action remains close to\nunity in the wide range of $\\beta$.",
        "category": "hep"
    },
    {
        "text": "Topological Twisting of Multiple M2-brane Theory: Bagger-Lambert-Gustavsson theory with infinite dimensional gauge group has\nbeen suggested to describe M5-brane as a condensation of multiple M2-branes.\nHere we perform a topological twisting of the Bagger-Lambert-Gustavsson theory.\nThe original SO(8) R-symmetry is broken to SO(3)XSO(5), where the former may be\ninterpreted as a diagonal subgroup of the Euclidean M5-brane world-volume\nsymmetry SO(6), while the latter is the isometry of the transverse five\ndirections. Accordingly the resulting action contains an one-form and five\nscalars as for the bosonic dynamical fields. We further lift the action to a\ngeneric curved three manifold. In order to make sure the genuine topological\ninvariance, we construct an off-shell formalism such that the scalar\nsupersymmetry transformations are nilpotent strictly off-shell and independent\nof the metric of the three manifold. The one loop partition function around a\ntrivial background yields the Ray-Singer torsion. The BPS equation involves an\nM2-brane charge density given by a Nambu-Goto action defined in an internal\nthree-manifold.",
        "category": "hep"
    },
    {
        "text": "Omega-Phi mixing at finite temperature: We compute the mass shifts and mixing of the Omega and Phi mesons at finite\ntemperature due to scattering from thermal pions. The Rho and b_1 mesons are\nimportant intermediate states. Up to a temperature of 140 MeV the Omega mass\nincreases by 12 MeV and the Phi mass decreases by 0.6 MeV. The change in mixing\nangles is negligible.",
        "category": "hep"
    },
    {
        "text": "Improved $\u03b1^4$ Term of the Muon Anomalous Magnetic Moment: We have completed the evaluation of all mass-dependent $\\alpha^4$ QED\ncontributions to the muon $g-2$, or $a_\\mu$, in two or more different\nformulations. Their numerical values have been greatly improved by an extensive\ncomputer calculation. The new value of the dominant $\\alpha^4$ term $A_2^{(8)}\n(m_\\mu / m_e) $ is 132.6823 (72), which supersedes the old value 127.50 (41).\nThe new value of the three-mass term $A_3^{(8)} (m_\\mu / m_e, m_\\mu / m_\\tau) $\nis 0.0376 (1). The term $A_2^{(8)} (m_\\mu / m_\\tau) $ is crudely estimated to\nbe about 0.005 and may be ignored for now. The total QED contribution to\n$a_\\mu$ is $116 584 719.58 (0.02)(1.15)(0.85) \\times 10^{-11}$, where 0.02 and\n1.15 are uncertainties in the $\\alpha^4$ and $\\alpha^5$ terms and 0.85 is from\nthe uncertainty in $\\alpha$ measured by atom interferometry. This raises the\nStandard Model prediction by $13.9 \\times 10^{-11}$, or about 1/5 of the\nmeasurement uncertainty of $a_\\mu$. It is within the noise of current\nuncertainty ($\\sim 100 \\times 10^{-11}$) in the estimated hadronic\ncontributions to $a_\\mu$.",
        "category": "hep"
    },
    {
        "text": "Magnetized Baryonic layer and a novel BPS bound in the\n  gauged-Non-Linear-Sigma-Model-Maxwell theory in (3+1)-dimensions through\n  Hamilton-Jacobi equation: It is show that one can derive a novel BPS bound for the gauged\nNon-Linear-Sigma-Model (NLSM) Maxwell theory in (3+1) dimensions which can\nactually be saturated. Such novel bound is constructed using Hamilton-Jacobi\nequation from classical mechanics. The configurations saturating the bound\nrepresent Hadronic layers possessing both Baryonic charge and magnetic flux.\nHowever, unlike what happens in the more common situations, the topological\ncharge which appears naturally in the BPS bound is a non-linear function of the\nBaryonic charge. This BPS bound can be saturated when the surface area of the\nlayer is quantized. The far-reaching implications of these results are\ndiscussed. In particular, we determine the exact relation between the magnetic\nflux and the Baryonic charge as well as the critical value of the Baryonic\nchemical potential beyond which these configurations become thermodynamically\nunstable.",
        "category": "hep"
    },
    {
        "text": "The Dark Side of String Theory: Black Holes and Black Strings: Solutions to low energy string theory describing black holes and black\nstrings are reviewed. Many of these solutions can be obtained by applying\nsimple solution generating transformations to the Schwarzschild metric. In a\nfew cases, the corresponding exact conformal field theory is known. Various\nproperties of these solutions are discussed including their global structure,\nsingularities, and Hawking temperature. (This review is based on lectures given\nat the 1992 Trieste Spring School on String Theory and Quantum Gravity.)",
        "category": "hep"
    },
    {
        "text": "Phenomenology of Anti-de-Sitter Conformal Field Theory Duality: By use of the AdS/CFT correspondence on orbifolds, models are derived which\ncan contain the standard model of particle phenomenology. It will be assumed\nthat the theory becomes conformally invariant at a renormalization-group\nfixed-point in the TeV region.",
        "category": "hep"
    },
    {
        "text": "Nonrenormalization theorems for N=2 Super Yang-Mills: The BRST algebraic proofs of the the nonrenormalization theorems for the beta\nfunctions of N=2 and N=4 Super Yang-Mills theories are reviewed.",
        "category": "hep"
    },
    {
        "text": "Evolution Kernels of Twist-3 Light-Ray Operators in Polarized Deep\n  Inelastic Scattering: The twist three contributions to the $Q^2$-evolution of the spin-dependent\nstructure function $g_2(x)$ are considered in the non-local operator product\napproach. Starting from the perturbative expansion of the T-product of two\nelectromagnetic currents, we introduce the nonlocal light-cone expansion proved\nby Anikin and Zavialov and determine the physical relevant set of light-ray\noperators of twist three. Using the equations of motion we show the equivalence\nof these operators to the Shuryak-Vainshtein operators plus the mass operator,\nand we determine their evolution kernels using the light-cone gauge with the\nLeibbrandt-Mandelstam prescription. The result of Balitsky and Braun for the\ntwist three evolution kernel (nonsinglet case) is confirmed.",
        "category": "hep"
    },
    {
        "text": "Deformation of infinite dimensional differential graded Lie algebras: We introduce a notion of elliptic differential graded Lie algebra. The class\nof elliptic algebras contains such examples as the algebra of differential\nforms with values in endomorphisms of a flat vector bundle over a compact\nmanifold, etc.\n  For elliptic differential graded algebra we construct a complete set of\ndeformations.\n  We show that for several deformation problems the existence of a formal power\nseries solution guarantees the existence of an analytic solution.",
        "category": "hep"
    },
    {
        "text": "TMD Evolution at Moderate Hard Scales: We summarize some of our recent work on non-perturbative transverse momentum\ndependent (TMD) evolution, emphasizing aspects that are necessary for dealing\nwith moderately low scale processes like semi-inclusive deep inelastic\nscattering.",
        "category": "hep"
    },
    {
        "text": "The Phase Diagram and Spectrum of Gauge-Fixed Abelian Lattice Gauge\n  Theory: We consider a lattice discretization of a covariantly gauge-fixed abelian\ngauge theory. The gauge fixing is part of the action defining the theory, and\nwe study the phase diagram in detail. As there is no BRST symmetry on the\nlattice, counterterms are needed, and we construct those explicitly. We show\nthat the proper adjustment of these counterterms drives the theory to a new\ntype of phase transition, at which we recover a continuum theory of (free)\nphotons. We present both numerical and (one-loop) perturbative results, and\nshow that they are in good agreement near this phase transition. Since\nperturbation theory plays an important role, it is important to choose a\ndiscretization of the gauge-fixing action such that lattice perturbation theory\nis valid. Indeed, we find numerical evidence that lattice actions not\nsatisfying this requirement do not lead to the desired continuum limit. While\nwe do not consider fermions here, we argue that our results, in combination\nwith previous work, provide very strong evidence that this new phase transition\ncan be used to define abelian lattice chiral gauge theories.",
        "category": "hep"
    },
    {
        "text": "Vacuum Cherenkov radiation in spacelike Maxwell-Chern-Simons theory: A detailed analysis of vacuum Cherenkov radiation in spacelike\nMaxwell-Chern-Simons (MCS) theory is presented. A semiclassical treatment\nreproduces the leading terms of the tree-level result from quantum field\ntheory. Moreover, certain quantum corrections turn out to be suppressed for\nlarge energies of the charged particle, for example, the quantum corrections to\nthe classical MCS Cherenkov angle. It is argued that MCS-theory Cherenkov\nradiation may, in principle, lead to anisotropy effects for ultra-high-energy\ncosmic rays (UHECRs). In addition, a qualitative discussion of vacuum Cherenkov\nradiation from a modified-Maxwell term in the action is given, together with\nUHECR bounds on some of its dimensionless \"coupling constants.\"",
        "category": "hep"
    },
    {
        "text": "Origin of Difference between $\\overline{d}$ and $\\overline{u}$ Partons\n  in the Nucleon: Using the Euclidean path-integral formulation for the hadronic tensor, we\nshow that the violation of the Gottfried sum rule does not come from the\ndisconnected quark-loop insertion. Rather, it comes from the connected (quark\nline) insertion involving quarks propagating in the backward time direction. We\ndemonstrate this by studying sum rules in terms of the scalar and axial- vector\nmatrix elements in lattice gauge calculations. The effects of eliminating\nbackward time propagation are presented.",
        "category": "hep"
    },
    {
        "text": "Seesaw neutrino dark matter by freeze-out: We investigate whether right-handed neutrinos can play the role of the dark\nmatter of the Universe and be generated by the freeze-out production mechanism.\nIn the standard picture, the requirement of a long lifetime of the right-handed\nneutrinos implies a small neutrino Yukawa coupling. As a consequence, they\nnever reach thermal equilibrium, thus prohibiting production by freeze-out. We\nnote that this limitation is alleviated if the neutrino Yukawa coupling is\nlarge enough in the early Universe to thermalize the sterile neutrinos, and\nthen becomes tiny at a certain moment, which makes them drop out of\nequilibrium. As a concrete example realization of this framework, we consider a\nFroggatt-Nielsen model supplemented by an additional scalar field which obeys a\nglobal symmetry (not the flavour symmetry). Initially, the vacuum expectation\nvalue of the flavon is such, that the effective neutrino Yukawa coupling is\nlarge and unsuppressed, keeping them in thermal equilibrium. At some point the\nnew scalar also gets a vacuum expectation value that breaks the symmetry. This\nmay occur in such a way that the vev of the flavon is shifted to a new\n(smaller) value. In that case, the Yukawa coupling is reduced such that the\nsterile neutrinos are rendered stable on cosmological time scales. We show that\nthis mechanism works for a wide range of sterile neutrino masses.",
        "category": "hep"
    },
    {
        "text": "The other Higgses, at resonance, in the Lee-Wick extension of the\n  Standard Model: Within the framework of the Lee Wick Standard Model (LWSM) we investigate\nHiggs pair production $gg \\to h_0 h_0$, $gg \\to h_0 \\tilde p_0$ and top pair\nproduction $gg \\to \\bar tt$ at the Large Hadron Collider (LHC), where the\nneutral particles from the Higgs sector ($h_0$, $\\tilde h_0$ and $\\tilde p_0$)\nappear as possible resonant intermediate states. We investigate the signal $gg\n\\to h_0 h_0 \\to \\bar b b \\gamma \\gamma$ and we find that the LW Higgs,\ndepending on its mass-range, can be seen not long after the LHC upgrade in\n2012. More precisely this happens when the new LW Higgs states are below the\ntop pair threshold. In $gg \\to \\bar tt$ the LW states, due to the wrong-sign\npropagator and negative width, lead to a dip-peak structure instead of the\nusual peak-dip structure which gives a characteristic signal especially for\nlow-lying LW Higgs states. We comment on the LWSM and the forward-backward\nasymmetry in view of the measurement at the TeVatron. Furthermore, we present a\ntechnique which reduces the hyperbolic diagonalization to standard\ndiagonalization methods. We clarify issues of spurious phases in the Yukawa\nsector.",
        "category": "hep"
    },
    {
        "text": "Different approaches to TMD Evolution with scale: Many apparently contradictory approaches to TMD factorization and its\nnon-perturbative content exist. This talk evaluated the different methods and\nproposed tools for resolving the contradictions and experimentally adjudicating\nthe results.",
        "category": "hep"
    },
    {
        "text": "Nonlinear QED and Physical Lorentz Invariance: The spontaneous breakdown of 4-dimensional Lorentz invariance in the\nframework of QED with the nonlinear vector potential constraint\nA_{\\mu}^{2}=M^{2}(where M is a proposed scale of the Lorentz violation) is\nshown to manifest itself only as some noncovariant gauge choice in the\notherwise gauge invariant (and Lorentz invariant) electromagnetic theory. All\nthe contributions to the photon-photon, photon-fermion and fermion-fermion\ninteractions violating the physical Lorentz invariance happen to be exactly\ncancelled with each other in the manner observed by Nambu a long ago for the\nsimplest tree-order diagrams - the fact which we extend now to the one-loop\napproximation and for both the time-like (M^{2}>0) and space-like (M^{2}<0)\nLorentz violation. The way how to reach the physical breaking of the Lorentz\ninvariance in the pure QED case taken in the flat Minkowskian space-time is\nalso discussed in some detail.",
        "category": "hep"
    },
    {
        "text": "The quantum Hilbert space of a chiral two-form in d = 5 + 1 dimensions: We consider the quantum theory of a two-form gauge field on a space-time\nwhich is a direct product of time and a spatial manifold, taken to be a compact\nfive-manifold with no torsion in its cohomology. We show that the Hilbert space\nof this non-chiral theory is a certain subspace of a tensor product of two\nspaces, that are naturally interpreted as the Hilbert spaces of a chiral and\nanti-chiral two-form theory respectively. We also study the observable\noperators in the non-chiral theory that correspond to the electric and magnetic\nfield strengths, the Hamiltonian, and the exponentiated holonomy of the\ngauge-field around a spatial two-cycle. All these operators can be decomposed\ninto contributions pertaining to the chiral and anti-chiral sectors of the\ntheory.",
        "category": "hep"
    },
    {
        "text": "Systematics of Staggered Fermion Spectral Properties and Topology: The spectral properties of a variety of improved staggered operators are\nstudied in quenched QCD. The systematic dependence of the infrared eigenvalue\nspectrum on i) improvement in the staggered operator, ii) improvement in the\ngauge field action, iii) lattice spacing and iv) lattice volume, is analyzed.\nIt is observed that eigenmodes with small eigenvalues and large chirality\nappear as the level of improvement increases or as one approaches the continuum\nlimit. These eigenmodes can be identified as the ``zero modes'' which\ncontribute to the chirality associated, via the index theorem, with the\ntopology of the background gauge field. This gives evidence that staggered\nfermions are sensitive to gauge field topology. After successfully identifying\nthese would-be chiral zero modes, the distribution of the remaining non-chiral\nmodes is compared with the predictions of Random Matrix Theory in different\ntopological sectors. Satisfactory agreement is obtained.",
        "category": "hep"
    },
    {
        "text": "Stochastic String Motion Above and Below the World Sheet Horizon: We study the stochastic motion of a relativistic trailing string in black\nhole AdS_5. The classical string solution develops a world-sheet horizon and we\ndetermine the associated Hawking radiation spectrum. The emitted radiation\ncauses fluctuations on the string both above and below the world-sheet horizon.\nIn contrast to standard black hole physics, the fluctuations below the horizon\nare causally connected with the boundary of AdS. We derive a bulk stochastic\nequation of motion for the dual string and use the AdS/CFT correspondence to\ndetermine the evolution a fast heavy quark in the strongly coupled $\\N=4$\nplasma. We find that the kinetic mass of the quark decreases by $\\Delta\nM=-\\sqrt{\\gamma \\lambda}T/2$ while the correlation time of world sheet\nfluctuations increases by $\\sqrt{\\gamma}$.",
        "category": "hep"
    },
    {
        "text": "Search for a Light Sterile Neutrino at Daya Bay: A search for light sterile neutrino mixing was performed with the first 217\ndays of data from the Daya Bay Reactor Antineutrino Experiment. The\nexperiment's unique configuration of multiple baselines from six 2.9~GW$_{\\rm\nth}$ nuclear reactors to six antineutrino detectors deployed in two near\n(effective baselines 512~m and 561~m) and one far (1579~m) underground\nexperimental halls makes it possible to test for oscillations to a fourth\n(sterile) neutrino in the $10^{\\rm -3}~{\\rm eV}^{2} < |\\Delta m_{41}^{2}| <\n0.3~{\\rm eV}^{2}$ range. The relative spectral distortion due to electron\nantineutrino disappearance was found to be consistent with that of the\nthree-flavor oscillation model. The derived limits on $\\sin^22\\theta_{14}$\ncover the $10^{-3}~{\\rm eV}^{2} \\lesssim |\\Delta m^{2}_{41}| \\lesssim 0.1~{\\rm\neV}^{2}$ region, which was largely unexplored.",
        "category": "hep"
    },
    {
        "text": "Asymptotic Black Holes and Conformal Mass in AdS Quadratic Curvature\n  Gravity: We explore the consistent truncation of conserved charges in Quadratic\nCurvature Gravity (QCG) with anti-de Sitter asymptotics to the linear order in\nthe Weyl tensor. The QCG action is given by the most general curvature-squared\ncorrections to Einstein gravity, and it is suitably rendered finite by the\naddition of extrinsic counterterms (Kounterterms). The conserved charges\nderived from this action are, as a consequence, nonlinear in the spacetime\nRiemann tensor. A detailed analysis of the falloff of generic static solutions\nleads to a charge proportional to the electric part of the Weyl tensor, without\nloss of information on the energy of the system. The procedure followed\nprovides firmer ground to the extension of the notion of Conformal Mass to\nhigher-curvature gravity, as it appears as associated to a renormalized action.\nWe observe that criticality condition in QCG poses an obstruction to the charge\nlinearization, in contrast to previous results in Lovelock gravity, where\ndegeneracy condition plays a key role.",
        "category": "hep"
    },
    {
        "text": "The Spontaneous Breaking of Chiral Symmetry without Goldstone Bosons: Considering a self-interaction only of mirror fermions in the context of a\nlattice-regularized fermion field theory, we show that the system undergoes\nspontaneous breaking of chiral symmetry and mirror-fermion masses are\ngenerated. However, it is explicitly shown that there are no Goldstone bosons\nappearing together with this spontaneous symmetry breaking phenomenon, since\nLorentz invariance, one of very general prerequisites of the Goldstone theorem,\nis violated. The result and its possible application are briefly discussed.",
        "category": "hep"
    },
    {
        "text": "Study of the thermal abelian monopoles with proper gauge fixing: The properties of the thermal abelian monopoles are studied in the\ndeconfinement phase of the SU(2) gluodynamics. To remove effects of Gribov\ncopies the simulated annealing algorithm is applied to fix the maximally\nabelian gauge. Computing the density of the thermal abelian monopoles in the\ntemperature range between 1.5T_c and 6.9T_c we show, by comparison with earlier\nresults, that the Gribov copies effects might be as high as 20% making proper\ngauge fixing mandatory. We find that in the infinite temperature limit the\nmonopole density converges to its value in 3-dimensional theory. To study the\ninteraction between monopoles we calculate the monopole-monopole and\nmonopole-antimonopole correlators at different temperatures in the region\n(1.5T_c, 6.9T_c). Using the result of this study we determine the screening\nmass, monopole-monopole coupling constant, monopole size and monopole mass. In\naddition we check the continuum limit of our results.",
        "category": "hep"
    },
    {
        "text": "A Summary of Recent Color Coherence Results: Recent experimental results on color coherence phenomena from e+e-, ep, and\nppbar collisions are presented. The data are compared to analytic perturbative\nQCD calculations based on the modified leading logarithm approximation and the\nlocal parton hadron duality hypothesis.",
        "category": "hep"
    },
    {
        "text": "Ground states of all mesons and baryons in a quark model with Hidden\n  Local Symmetry: We extend the chiral quark model for $u$, $d$, $c$ and $b$ quarks with vector\nmesons, which we proposed in the previous analysis, to a model with the $s$\nquark. We include the nonet pseudo-scalar and vector mesons together with the\nsinglet scalar meson based on the SU(3)$_L \\times$SU(3)$_R$ chiral symmetry\ncombined with the Hidden Local Symmetry, which mediate force among $u$, $d$ and\n$s$ quarks. We fit the model parameters to the known ground state mesons and\nbaryons. We show that the mass spectra of those hadrons are beautifully\nreproduced. We predict the masses of missing ground states, one meson and\ntwenty baryons, which will be tested in the future experiment.",
        "category": "hep"
    },
    {
        "text": "Minimal Composite Inflation: We investigate models in which the inflaton emerges as a composite field of a\nfour dimensional, strongly interacting and nonsupersymmetric gauge theory\nfeaturing purely fermionic matter. We show that it is possible to obtain\nsuccessful inflation via non-minimal coupling to gravity, and that the\nunderlying dynamics is preferred to be near conformal. We discover that the\ncompositeness scale of inflation is of the order of the grand unified energy\nscale.",
        "category": "hep"
    },
    {
        "text": "Nondecoupling phenomena in QED in a magnetic field and noncommutative\n  QED: The dynamics in QED in a strong constant magnetic field and its connection\nwith the noncommutative QED are studied. It is shown that in the regime with\nthe lowest Landau level (LLL) dominance the U(1) gauge symmetry in the fermion\ndeterminant is transformed into the noncommutative $U(1)_{nc}$ gauge symmetry.\nIn this regime, the effective action is intimately connected with that in\nnoncommutative QED and the original U(1) gauge Ward identities are broken (the\nLLL anomaly). On the other hand, it is shown that although a contribution of\neach of an infinite number of higher Landau levels is suppressed in an infrared\nregion, their cumulative contribution is not (a nondecoupling phenomenon). This\nleads to a restoration of the original U(1) gauge symmetry in the infrared\ndynamics. The physics underlying this phenomenon reflects the important role of\na boundary dynamics at spatial infinity in this problem.",
        "category": "hep"
    },
    {
        "text": "On-Mass-Shell Gaugino Condensation in Z_{N} Orbifold Compactifications: We discuss non-perturbative aspects of string effective field theories with\nN=1 supersymmetry in four dimensions. By the use of a scalar potential, which\nis on-shell invariant under the supersymmetric duality of the dilaton, we study\ngaugino condensation in (2,2) symmetric Z_{N} orbifold compactifications. The\nduality under consideration relates a two-form antisymmetric tensor to a\npseudoscalar. We show, that our approach is independent of the\nsuperfield-representation of the dilaton and preserves the U(1)_{PQ}\nPeccei-Quinn symmetry exactly.",
        "category": "hep"
    },
    {
        "text": "Type IIB flux vacua from G-theory II: We find analytic solutions of type IIB supergravity on geometries that\nlocally take the form $\\text{Mink}\\times M_4\\times \\mathbb{C}$ with $M_4$ a\ngeneralised complex manifold. The solutions involve the metric, the dilaton,\nNSNS and RR flux potentials (oriented along the $M_4$) parametrised by\nfunctions varying only over $\\mathbb{C}$. Under this assumption, the\nsupersymmetry equations are solved using the formalism of pure spinors in terms\nof a finite number of holomorphic functions. Alternatively, the solutions can\nbe viewed as vacua of maximally supersymmetric supergravity in six dimensions\nwith a set of scalar fields varying holomorphically over $\\mathbb{C}$. For a\nclass of solutions characterised by up to five holomorphic functions, we\noutline how the local solutions can be completed to four-dimensional flux vacua\nof type IIB theory. A detailed study of this global completion for solutions\nwith two holomorphic functions has been carried out in the companion paper [1].\nThe fluxes of the global solutions are, as in F-theory, entirely codified in\nthe geometry of an auxiliary $K3$ fibration over $\\mathbb{CP}^1$. The results\nprovide a geometric construction of fluxes in F-theory.",
        "category": "hep"
    },
    {
        "text": "Charm of small $x$ neutrino DIS: Due to the weak current non-conservation the diffractive excitation of charm\nand strangeness dominates the longitudinal structure function $F_L(x,Q^2)$ of\nneutrino DIS at small Bjorken $x$. Based on the color dipole BFKL approach we\nreport quantitative predictions for this effect in the kinematical range of the\nCCFR/NuTeV experiment. We comment on the relevance of our findings to\nexperimental tests of PCAC.",
        "category": "hep"
    },
    {
        "text": "Charged Higgs Boson Search at the LHC: This review starts with a brief introduction to the charged Higgs boson\n$(H^\\pm)$ in the Minimal Supersymmetric Standard Model (MSSM). It then\ndiscusses the prospects of a relatively light $H^\\pm$ boson search via top\nquark decay and finally a heavy $H^\\pm$ boson search at LHC. The viable\nchannels for $H^\\pm$ search are discussed, with particular emphasis on the\n$H^\\pm -> tau+nu$ decay channel.",
        "category": "hep"
    },
    {
        "text": "New Charged Black Holes in Five Dimensions: We obtain new stationary charged solutions of five-dimensional minimal\nsupergravity. We first obtain purely dipole charged solutions, by extending a\ntechnique that we developed for five-dimensional Ricci-flat metrics in a\nprevious paper, which could be viewed as being analogous to a four-dimensional\nconstruction by Demianski and Plebanski. The further introduction of electric\ncharge is achieved by means of a solution-generating technique, which exploits\nthe global SL(2,R) symmetry of five-dimensional minimal supergravity reduced on\na timelike direction to four dimensions. We present this procedure in detail,\nsince it provides a particularly simple general way of adding charge to any\nstationary solution of five-dimensional minimal supergravity. The new charged\nsolutions we obtain limit in special cases to black rings carrying electric and\nmagnetic dipole charge, or to charged Myers-Perry rotating black holes. We\nanalyse the general solutions in detail, showing that they can describe\nasymptotically locally flat black holes whose horizon is a lens space\nL(n;m)=S^3/\\Gamma(n;m). At infinity they approach Minkowski_5/\\Gamma(m;n).",
        "category": "hep"
    },
    {
        "text": "Casimir Energy in the Axial Gauge: The zero-point energy of a conducting spherical shell is studied by imposing\nthe axial gauge via path-integral methods, with boundary conditions on the\nelectromagnetic potential and ghost fields. The coupled modes are then found to\nbe the temporal and longitudinal modes for the Maxwell field. The resulting\nsystem can be decoupled by studying a fourth-order differential equation with\nboundary conditions on longitudinal modes and their second derivatives. The\nexact solution of such equation is found by using a Green-function method, and\nis obtained from Bessel functions and definite integrals involving Bessel\nfunctions. Complete agreement with a previous path-integral analysis in the\nLorenz gauge, and with Boyer's value, is proved in detail.",
        "category": "hep"
    },
    {
        "text": "Non-relativistic bound states in a finite volume: We derive general results for the mass shift of bound states with angular\nmomentum l >= 1 in a periodic cubic box in two and three spatial dimensions.\nOur results have applications to lattice simulations of hadronic molecules,\nhalo nuclei, and Feshbach molecules. The sign of the mass shift can be related\nto the symmetry properties of the state under consideration. We verify our\nanalytical results with explicit numerical calculations. Moreover, we comment\non the relations connecting the effective range parameter, the binding momentum\nof a given state and the asymptotic normalization coefficient of the\ncorresponding wave function. We give explicit expressions for this relation in\nthe shallow binding limit.",
        "category": "hep"
    },
    {
        "text": "Rare muon and tau decays in A4 Models: We analyze the most general dimension six effective Lagrangian, invariant\nunder the flavour symmetry A4 x Z3 x U(1) proposed to reproduce the near\ntri-bimaximal lepton mixing observed in neutrino oscillations. The effective\nLagrangian includes four-lepton operators that violate the individual lepton\nnumbers in the limit of exact flavor symmetry and allow unsuppressed processes\nsatisfying the rule |Delta L_e x Delta L_mu x Delta L_tau| = 2. The most\nstringent bounds on the strength of the new interactions come from the observed\nuniversality of leptonic muon and tau decays, from the agreement between the\nFermi constant measured in the muon decay and that extracted from the mW/mZ\nratio, and from the limits on the rare decays tau^- -> mu^+ e^- e^- and tau^-\n-> e^+ mu^- mu^-. We also investigate these effects in a specific\nsupersymmetric (SUSY) realization of the flavour symmetry and we find large\nsuppression factors for all the processes allowed by the selection rule. We\nexplain why this rule is violated in the SUSY context and we provide a complete\npicture of lepton flavour violation in the SUSY version of A4 x Z_3 x U(1).",
        "category": "hep"
    },
    {
        "text": "Snowmass White Paper: Implications of Quantum Gravity for Particle\n  Physics: Quantum gravity places important consistency conditions on low-energy\neffective field theory, such as the absence of global symmetries. These may\nhave important consequences in the search for particle physics beyond the\nStandard Model. We review some of these conditions and their phenomenological\nimplications for the strong CP problem, the weak scale, new gauge interactions,\nand cosmology. We also offer some general comments on how these ideas can guide\nmodel building.",
        "category": "hep"
    },
    {
        "text": "Multi-lepton production at high transverse momentum at HERA: A search for events containing two or more high-transverse-momentum isolated\nleptons has been performed in ep collisions with the ZEUS detector at HERA\nusing the full collected data sample, corresponding to an integrated luminosity\nof 480 pb^{-1}. The number of observed events has been compared with the\nprediction from the Standard Model, searching for possible deviations,\nespecially for multi-lepton events with invariant mass larger than 100 GeV.\nGood agreement with the Standard Model has been observed. Total and\ndifferential cross sections for di-lepton production have been measured in a\nrestricted phase space dominated by photon-photon collisions.",
        "category": "hep"
    },
    {
        "text": "Nonlocal QED admits a finitely induced gauge field action: The Letter reconsiders a result obtained by Chr\\'etien and Peierls in 1954\nwithin nonlocal QED in 4D [Proc. Roy. Soc. London A 223, 468]. Starting from\nsecondly quantized fermions subject to a nonlocal action with the kernel $[\ni\\not\\partial_x a(x) - m b(x)]$ and gauge covariantly coupled to an external\nU(1) gauge field they found that for $a = b$ the induced gauge field action\ncannot be made finite irrespectively of the choice of the nonlocality $a$ $(=\nb)$. But, the general case $a \\neq b$ naturally to be studied admits a finitely\ninduced gauge field action, as the present Letter demonstrates.",
        "category": "hep"
    },
    {
        "text": "Squashing, Mass, and Holography for 3d Sphere Free Energy: We consider the sphere free energy $F(b;m_I)$ in $\\mathcal{N}=6$ ABJ(M)\ntheory deformed by both three real masses $m_I$ and the squashing parameter\n$b$, which has been computed in terms of an $N$ dimensional matrix model\nintegral using supersymmetric localization. We show that setting\n$m_3=i\\frac{b-b^{-1}}{2}$ relates $F(b;m_I)$ to the round sphere free energy,\nwhich implies infinite relations between $m_I$ and $b$ derivatives of\n$F(b;m_I)$ evaluated at $m_I=0$ and $b=1$. For $\\mathcal{N}=8$ ABJ(M) theory,\nthese relations fix all fourth order and some fifth order derivatives in terms\nof derivatives of $m_1,m_2$, which were previously computed to all orders in\n$1/N$ using the Fermi gas method. This allows us to compute $\\partial_b^4\nF\\vert_{b=1}$ and $\\partial_b^5 F\\vert_{b=1}$ to all orders in $1/N$, which we\nprecisely match to a recent prediction to sub-leading order in $1/N$ from the\nholographically dual $AdS_4$ bulk theory.",
        "category": "hep"
    },
    {
        "text": "Loop-corrected Higgs Masses in the NMSSM with Inverse Seesaw Mechanism: In this study, we work in the framework of the Next-to-Minimal extension of\nthe Standard Model (NMSSM) extended by six singlet leptonic superfields.\nThrough the mixing with the three doublet leptonic superfields, the non-zero\ntiny neutrino masses can be generated through the inverse seesaw mechanism.\nWhile $R$-parity is conserved in this model lepton number is explicitly\nviolated. We quantify the impact of the extended neutrino sector on the NMSSM\nHiggs sector by computing the complete one-loop corrections with full momentum\ndependence to the Higgs boson masses in a mixed on-shell-$\\overline{\\mbox{DR}}$\nrenormalization scheme, with and without the inclusion of CP violation. The\nresults are consistently combined with the dominant two-loop corrections at\n${\\cal O}(\\alpha_t(\\alpha_s+\\alpha_t))$ to improve the predictions for the\nHiggs mixing and the loop-corrected masses. In our numerical study we include\nthe constraints from the Higgs data, the neutrino oscillation data, the charged\nlepton flavor-violating decays $l_i \\to l_j + \\gamma$, and the new physics\nconstraints from the oblique parameters $S,T,U$. We present in this context the\none-loop decay width for $l_i \\to l_j + \\gamma$. The loop-corrected Higgs boson\nmasses are included in the Fortran code NMSSMCALC-nuSS.",
        "category": "hep"
    },
    {
        "text": "Efficiency of swimming of micro-organism and singularity in shape space: Micro-organisms can be classified into three different types according to\ntheir size. We study the efficiency of the swimming of micro-organism in two\ndimensional fluid as a device for helping the explanation of this hierarchy in\nthe size. We show that the efficiency of flagellate becomes unboundedly large,\nwhereas that of ciliate has the upper bound. The unboundedness is related to\nthe curious feature of the shape space, that is, a singularity at the basic\nshape of flagellate.",
        "category": "hep"
    },
    {
        "text": "QED(1+1) on the Light Front and its implications for\n  semiphenomenological methods in QCD(3+1): A possibility of semiphenomenological description of vacuum effects in QCD\nquantized on the Light Front (LF) is discussed. A modification of the canonical\nLF Hamiltonian for QCD is proposed, basing on the detailed study of the exact\ndescription of vacuum condensate in QED(1+1) that uses correct form of LF\nHamiltonian.",
        "category": "hep"
    },
    {
        "text": "Form Factors for Semileptonic B -> pi and D -> pi Decays from the Omnes\n  Representation: We use the Omnes representation to obtain the q-squared dependence of the\nform factors f+ and f0 for semileptonic H -> pi decays from the elastic pi H ->\npi H scattering amplitudes, where H denotes a B or D meson. The scattering\namplitudes used satisfy elastic unitarity and are calculated from two-particle\nirreducible amplitudes obtained using tree-level heavy meson chiral\nperturbation theory (HMChPT). The q-squared dependences for the form factors\nagree with lattice QCD results when the HMChPT coupling constant, g, takes\nvalues smaller than 0.32, and confirm the milder dependence of f0 on q-squared\nfound in sumrule calculations.",
        "category": "hep"
    },
    {
        "text": "Fully-heavy hadronic molecules $B_c^{(*)+} B_c^{(*)-}$ bound by\n  fully-heavy mesons: A lot of exotic hadrons were reported in the past twenty years, which bring\nus the renaissance of the hadron spectroscopy. Most of them can be understood\nas hadronic molecules, whose interactions are mainly due to the exchange of\nlight mesons, and specifically, light vector mesons through the coupled-channel\nunitary approach within the local hidden-gauge formalism. It is still\ncontroversial whether the interaction arising from the exchange of heavy mesons\nis capable of forming hadronic molecules. We apply the coupled-channel unitary\napproach to study the fully-heavy $b \\bar b c \\bar c$ system, where the\nexchanged mesons can only be the fully-heavy vector mesons $J/\\psi$, $B_c^*$,\nand $\\Upsilon$. Especially, the $J/\\psi$ meson is much lighter than the\n$B_c^{(*)}$ mesons, so the present study can be taken as a general\ninvestigation on the question whether a lower-mass fully-heavy meson is able to\nbind two higher-mass fully-heavy hadrons. Our results suggest the existence of\nthe fully-heavy hadronic molecules $|B_c^{+} B_c^{-}; J^{PC}=0^{++} \\rangle$,\n$|B_c^{*+} B_c^{-} - c.c.; J^{PC}=1^{+-} \\rangle$, and $|B_c^{*+} B_c^{*-};\nJ^{PC}=2^{++} \\rangle$ as well as the possible existence of $|B_c^{*+} B_c^{-}\n+ c.c.; J^{PC}=1^{++} \\rangle$. These states are potentially to be observed in\nthe $\\mu^+ \\mu^- J/\\psi$ and $\\mu^+ \\mu^- \\Upsilon$ channels in future ATLAS,\nCMS, and LHCb experiments.",
        "category": "hep"
    },
    {
        "text": "Loop corrections to pion and kaon neutrinoproduction: In this paper we study the next-to-leading order corrections to deeply\nvirtual pion and kaon production in neutrino experiments. We estimate these\ncorrections in the kinematics of the Minerva experiment at FERMILAB, and find\nthat they are sizable and increase the leading order cross-section by up to a\nfactor of two. We provide a code, which can be used for the evaluation of the\ncross-sections, taking into account these corrections and employing various GPD\nmodels.",
        "category": "hep"
    },
    {
        "text": "Deep Learning Symmetries and Their Lie Groups, Algebras, and Subalgebras\n  from First Principles: We design a deep-learning algorithm for the discovery and identification of\nthe continuous group of symmetries present in a labeled dataset. We use fully\nconnected neural networks to model the symmetry transformations and the\ncorresponding generators. We construct loss functions that ensure that the\napplied transformations are symmetries and that the corresponding set of\ngenerators forms a closed (sub)algebra. Our procedure is validated with several\nexamples illustrating different types of conserved quantities preserved by\nsymmetry. In the process of deriving the full set of symmetries, we analyze the\ncomplete subgroup structure of the rotation groups $SO(2)$, $SO(3)$, and\n$SO(4)$, and of the Lorentz group $SO(1,3)$. Other examples include squeeze\nmapping, piecewise discontinuous labels, and $SO(10)$, demonstrating that our\nmethod is completely general, with many possible applications in physics and\ndata science. Our study also opens the door for using a machine learning\napproach in the mathematical study of Lie groups and their properties.",
        "category": "hep"
    },
    {
        "text": "Particle dynamics near extreme Kerr throat and supersymmetry: The extreme Kerr throat solution is believed to be non-supersymmetric.\nHowever, its isometry group SO(2,1) x U(1) matches precisely the bosonic\nsubgroup of N=2 superconformal group in one dimension. In this paper we\nconstruct N=2 supersymmetric extension of a massive particle moving near the\nhorizon of the extreme Kerr black hole. Bosonic conserved charges are related\nto Killing vectors in a conventional way. Geometric interpretation of\nsupersymmetry charges remains a challenge.",
        "category": "hep"
    },
    {
        "text": "Absorption of Sub-MeV Fermionic Dark Matter by Electron Targets: We study a new class of signals where fermionic dark matter is absorbed by\nbound electron targets. Fermionic absorption signals in direct detection and\nneutrino experiments are sensitive to dark matter with sub-MeV mass, probing a\nregion of parameter space in which dark matter is otherwise challenging to\ndetect. We calculate the rate and energy deposition spectrum in xenon-based\ndetectors, making projections for current and future experiments. We present\ntwo possible models that display fermionic absorption by electrons and study\nthe detection prospects in light of other constraints.",
        "category": "hep"
    },
    {
        "text": "The Untwisted Stabilizer in Simple Current Extensions: A method is presented to compute the order of the untwisted stabilizer of a\nsimple current orbit, as well as some results about the properties of the\nresolved fields in a simple current extension.",
        "category": "hep"
    },
    {
        "text": "Noncyclic geometric phases and helicity transitions for neutrino\n  oscillations in a magnetic field: We show that neutrino spin and spin-flavor transitions involve nonvanishing\ngeometric phases. The geometric character of neutrino spin rotation is explored\nby studying the neutrino spin trajectory in the projective Hilbert space\nrepresentation and its relation to the geometric phase. Analytical expressions\nare derived for noncyclic geometric phases. Several calculations are performed\nfor different cases of rotating and nonrotating magnetic fields in the context\nof solar neutrinos and neutrinos produced inside neutron stars. Also the\neffects of adiabaticity, critical magnetic fields and cross boundary effects in\nthe case of neutrinos emanating out of neutron stars are examined.",
        "category": "hep"
    },
    {
        "text": "The LHC potential of Vector-like quark doublets: The existence of new vector-like quarks is often predicted by models of new\nphysics beyond the Standard Model, and the development of discovery strategies\nat colliders is the object of an intense effort from the high-energy community.\nOur analysis aims at identifying the constraints on and peculiar signatures of\nsimplified scenarios containing \\textit{two} vector-like quark doublets mixing\nwith \\textit{any} of the SM quark generations. This scenario is a necessary\ningredient of a broad class of theoretically motivated constructions. We focus\non the two charge $2/3$ states $t_{1,2}^\\prime$ that, due to their peculiar\nmixing patterns, feature new production and decay modes that are not searched\nfor at the LHC: single production of the heavier state can dominate over the\nlight one, while pair production via electroweak interactions overcomes the QCD\none for masses at the TeV scale.",
        "category": "hep"
    },
    {
        "text": "Light Nuclei from Lattice QCD: Spectrum, Structure and Reactions: Lattice Quantum Chromodynamics (LQCD) studies of light nuclei have entered an\nera when first results on structure and reaction properties of light nuclei\nhave emerged in recent years, complementing existing results on their\nlowest-lying spectra. Although in these preliminary studies the quark masses\nare still set to larger than the physical values, a few results at the physical\npoint can still be deduced from simple extrapolations in the quark masses. The\nprogress paves the road towards obtaining several important quantities in\nnuclear physics, such as nuclear forces and nuclear matrix elements relevant\nfor pp fusion, single and double-beta decay processes, neutrino-nucleus\nscattering, searches for CP violation, nuclear response in direct dark-matter\ndetection experiments, as well as gluonic structure of nuclei for an\nElectron-Ion Collider (EIC) program. Some of the recent developments, the\nresults obtained, and the outlook of the field will be briefly reviewed in this\ntalk, with a focus on results obtained by the Nuclear Physics From LQCD\n(NPLQCD) collaboration.",
        "category": "hep"
    },
    {
        "text": "The effective action of Double Field Theory: We perform a generalized Scherk-Schwarz dimensional reduction of Double Field\nTheory on a twisted double torus. The four dimensional effective action is\nshown to exactly reproduce the bosonic electric sector of gauged N = 4\nsupergravity. We present explicit expressions for the gaugings in terms of the\ntwists, and analyze the associated string backgrounds. This framework provides\na higher dimensional origin of the gaugings in terms of generalized fluxes.",
        "category": "hep"
    },
    {
        "text": "Tau Neutrino Decays and Big Bang Nucleosynthesis: We investigate the non-radiative decay during nucleosynthesis of a massive\ntau neutrino with mass 0.1 - 1 MeV into an electron neutrino and a scalar or\npseudoscalar particle, $\\phi$. The full Boltzmann equation is used and shown to\ngive markedly different results than the usual non-relativistic formalism for\nrelativistic or semi-relativistic neutrino decays. Indeed, the region we\ninvestigate is where the formalism that has previously been applied to solving\nthis problem is expected to break down. We also compare the nucleosynthesis\npredictions from this scenario with results from the standard model and with\nsome of the available observational determinations of the primordial\nabundances. It is found that for relativistic or semi-relativistic decays the\nhelium abundance can be significantly lowered without changing other light\nelement abundances. Since a problem with the standard model of Big Bang\nnucleosynthesis is that helium appears to be overproduced, a decay of the type\nwe discuss can be a possible solution.",
        "category": "hep"
    },
    {
        "text": "Heavy Quark Decays: The status of heavy-quark decays as of summer 1999 is reviewed. New\nmeasurements of semileptonic B decays from LEP and from CLEO are reported and\nthe status of determining the CKM parameters |Vcb| and |Vub| is assessed. Rare\ncharmless hadronic B decays are reviewed, including the first observation of\nB->pi pi from CLEO. First attempts to measure CP asymmetries in rare decays are\ndescribed. The implications of all of the data for our understanding of the\nStandard Model are briefly assessed.",
        "category": "hep"
    },
    {
        "text": "Probing Relativity using Space-Based Experiments: An overview of space tests searching for small deviations from special\nrelativity arising at the Planck scale is given. Potential high-sensitivity\nspace-based experiments include ones with atomic clocks, masers, and\nelectromagnetic cavities. We show that a significant portion of the coefficient\nspace in the Standard-Model Extension, a framework that covers the full\nspectrum of possible effects, can be accessed using space tests. Some remarks\non Lorentz violation in the gravitational sector are also given.",
        "category": "hep"
    },
    {
        "text": "Semi-perturbative unification with extra vector-like families: We make a comprehensive analysis of an extended supersymmetric model(ESSM)\nobtained by adding a pair of vector-like families to the minimal supersymmetric\nstandard model and having specific forms of 5 x 5 fermion mass matrices. The\nsinglet Higgs couplings which link the ordinary to vector-like generations do\nnot have the renormalization effects of the gauge interactions and hence the\n\"quasi-infrared fixed point\" near the scale of the top quark mass. The two-loop\nYukawa effects on gauge couplings lead to an unified coupling $\\alpha_X$ around\n0.2 with an unification scale M_X of 10^{16.9} GeV. Large Yukawa effects in the\nhigh energy region arrest the growth of the QCD coupling near M_X making the\nevolution flat. The renormalization effects of the vector-like generations on\nsoft mass parameters has important effects on the charge and color\nbreaking(CCB)minima. We will show that there exists parameter space where there\nis no charge and color breaking. We will also demonstrate that there exists\nminima of the Higgs potential which satisfies the mass of the Z boson but avoid\nCCB. Upper limits on the mass of the lightest Higgs boson from the one-loop\neffective scalar potential is obtained for sets of universal soft supersymmetry\nbreaking mass parameters.",
        "category": "hep"
    },
    {
        "text": "Scalar sector of Supersymmetric ${SU}(3)_C\\otimes {SU}(3)_L \\otimes\n  {U}(1)_N$ Model with right-handed neutrinos: We investigate a scalar sector of the supersymmetric $ SU_C(3) \\otimes\nSU_L(3)\\otimes U_N(1)$ model with right-handed neutrinos. The mass spectra are\nderived. We show that only neutral Higgs sector with lepton number L=0 could\nhave a VEV. There is no mixing between scalars having L=0 and bilepton scalars\nhaving L=2. There are six Goldstone bosons: two in neutral sector, three in\npseudo-scalar sector and one in charged scalar sector. For a given set of input\nparameters (five from the $F$ terms and two from the soft term) all the scalar\nsectors in this model contain the upper limit of 230 GeV to the mass of the\nlightest scalar, which are in agreement with the lower limit of the SM Higgs\nboson obtained by LEP.",
        "category": "hep"
    },
    {
        "text": "Summing the Instantons in Half-Twisted Linear Sigma Models: We study half-twisted linear sigma models relevant to (0,2) compactifications\nof the heterotic string. Focusing on theories with a (2,2) locus, we examine\nthe linear model parameter space and the dependence of genus zero half-twisted\ncorrelators on these parameters. We show that in a class of theories the\ncorrelators and parameters separate into A and B types, present techniques to\ncompute the dependence, and apply these to some examples. These results should\nbear on the mathematics of (0,2) mirror symmetry and the physics of the moduli\nspace and Yukawa couplings in heterotic compactifications.",
        "category": "hep"
    },
    {
        "text": "On the high-energy Elastic Scattering of hadrons at large t: The main contribution to hard elastic scattering comes from components of\nwave functions of colliding hadrons that contain minimum number of partons. We\ndiscuss this mechanism in regge and parton approaches and estimate the\nprobabilities that colliding hadrons are in such bare states. The behavior of\ncross-sections in this regime at various energies can give nontrivial\ninformation on high energy dynamics.",
        "category": "hep"
    },
    {
        "text": "Oscillons in the presence of external potential: We discuss similarity between oscillons and oscillational mode in perturbed\n$\\phi^4$. For small depths of the perturbing potential it is difficult to\ndistinguish between oscillons and the mode in moderately long time evolution,\nmoreover one can transform one into the other by adiabatically switching on and\noff the potential. Basins of attraction are presented in the parameter space\ndescribing the potential and initial conditions.",
        "category": "hep"
    },
    {
        "text": "Modularity of Schur index, modular differential equations, and\n  high-temperature asymptotics: In this paper we analytically explore the modularity of the flavored Schur\nindex of 4d $\\mathcal{N} = 2$ SCFTs. We focus on the $A_1$ theories of\nclass-$\\mathcal{S}$ and $\\mathcal{N} = 4$ theories with $SU(N)$ gauge group. We\nwork out the modular orbit of the flavored index and defect index, compute the\ndimension of the space spanned by the orbit, and provide complete basis for\ncomputing modular transformation matrices. The dimension obtained from the\nflavored analysis predicts the minimal order of the unflavored modular\ndifferential equation satisfied by the unflavored Schur index. With the help of\nmodularity, we also study analytically the high-temperature asymptotics of the\nSchur index. In the high-temperature limit $\\tau \\to +i0$, we identified the\n(defect) Schur index of the genus-zero $A_1$ theories of class-$\\mathcal{S}$\nwith the $S^3$-partition function of the $SU(2) \\times U(1)^n$ star-shape\nquiver (with Wilson line insertion). In the identification, we observe an\ninteresting relation between the linear-independence of defect indices and the\nconvergence of the Wilson line partition functions.",
        "category": "hep"
    },
    {
        "text": "Falsifying High-Scale Leptogenesis at the LHC: Measuring a non-zero value for the cross section of any lepton number\nviolating (LNV) process would put a strong lower limit on the washout factor\nfor the effective lepton number density in the early universe at times close to\nthe electroweak phase transition and thus would lead to important constraints\non any high-scale model for the generation of the observed baryon asymmetry\nbased on LNV. In particular, for leptogenesis models with masses of the\nright-handed neutrinos heavier than the mass scale observed at the LHC, the\nimplied large washout factors would lead to a violation of the\nout-of-equilibrium condition and exponentially suppress the net lepton number\nproduced in such leptogenesis models. We thus demonstrate that the observation\nof LNV processes at the LHC results in the falsification of high-scale\nleptogenesis models. However, no conclusions about the viability of\nleptogenesis models can be drawn from the non-observation of LNV processes.",
        "category": "hep"
    },
    {
        "text": "Some Features of the Hadronic $B_c^{(*)}$-meson Production at Large\n  $p_T$: Calculations of the hadronic $B^{(*)}_c$-mesons production performed in the\nframework of the perturbative QCD taking into account $O(\\alpha_s^4)$ Feynmann\ndiagrams are presented. A comparison of the exact calculations with those based\non the fragmentation model of $\\bar b\\rightarrow B^{(*)}_c+X$ shows the large\ndiscrepancy between them. The exact calculations of the $B^{(*)}_c$-mesons\nproduction cross-sections as the function of $p_T$ at the energy of the FNAL\nTevatron ($\\sqrt{s}=1.8$ TeV) are given. The predicted ratio of the vector to\nthe pseudoscalar state cross-sections is about $R\\sim 3$ instead of $R\\sim 1.4$\nfor the fragmentation model.",
        "category": "hep"
    },
    {
        "text": "Duality Equivalence Between Self-Dual And Topologically Massive\n  Non-Abelian Models: The non-abelian version of the self-dual model proposed by Townsend, Pilch\nand van Nieuwenhuizen presents some well known difficulties not found in the\nabelian case, such as well defined duality operation leading to self-duality\nand dual equivalence with the Yang-Mills-Chern-Simons theory, for the full\nrange of the coupling constant. These questions are tackled in this work using\na distinct gauge lifting technique that is alternative to the master action\napproach first proposed by Deser and Jackiw. The master action, which has\nproved useful in exhibiting the dual equivalence between theories in diverse\ndimensions, runs into trouble when dealing with the non-abelian case apart from\nthe weak coupling regime. This new dualization technique on the other hand, is\ninsensitive of the non-abelian character of the theory and generalize\nstraightforwardly from the abelian case. It also leads, in a simple manner, to\nthe dual equivalence for the case of couplings with dynamical fermionic matter\nfields. As an application, we discuss the consequences of this dual equivalence\nin the context of 3D non-abelian bosonization.",
        "category": "hep"
    },
    {
        "text": "Estimation of Power Corrections to Hadronic Event Shapes: Power corrections to hadronic event shapes are estimated using a recently\nsuggested relationship between perturbative and non-perturbative effects in\nQCD. The infrared cutoff dependence of perturbative calculations is related to\nnon-perturbative contributions with the same dependence on the energy scale\n$Q$. Corrections proportional to $1/Q$ are predicted, in agreement with\nexperiment. An empirical proportionality between the magnitudes of perturbative\nand non-perturbative coefficients is noted.",
        "category": "hep"
    },
    {
        "text": "Dark Matter Direct Detection in $t$-channel mediator models: We perform a comprehensive study of the Direct Detection phenomenology of\nsinglet Dark Matter $t$-channel portal models. For that purpose, we present a\ncomplete one-loop matching onto a Heavy Dark-Matter Effective Field Theory,\nleading to a complete computation of the loop induced direct detection\ncross-section for both scalar and fermionic Dark Matter candidates. The results\nare compared with current and future bounds from Direct Detection experiments,\nas well as with the requirement of the correct Dark Matter relic density.",
        "category": "hep"
    },
    {
        "text": "Probing the Sea Quark Content of the Proton with One-Particle-Inclusive\n  Processes: We investigate the feasibility of constraining parton distribution functions\nin the proton through a comparison with data on semi-inclusive deep-inelastic\nlepton-nucleon scattering. Specifically, we reweight replicas of these\ndistributions according to how well they reproduce recent, very precise charged\nkaon multiplicity measurements and analyze how this procedure optimizes the\ndetermination of the sea quark densities and improves their uncertainties. The\nresults can help to shed new light on the long standing question on the size of\nthe flavor and charge symmetry breaking among quarks of radiative origin. An\niterative method is proposed and adopted to account for the inevitable\ncorrelation with what is assumed about the parton-to-hadron fragmentation\nfunctions in the reweighting procedure. It is shown how the fragmentation\nfunctions can be optimized simultaneously in each step of the iteration. As a\nfirst case study, we implement this method to analyze kaon production data.",
        "category": "hep"
    },
    {
        "text": "On the triplet anti-triplet symmetry in 3-3-1 models: We present a detailed discussion of the triplet anti-triplet symmetry in\n3-3-1 models. The full set of conditions to realize this symmetry is provided,\nwhich includes in particular the requirement that the two vacuum expectation\nvalues of the two scalar triplets responsible for making the W and Z bosons\nmassive must be interchanged. We apply this new understanding to the\ncalculation of processes that have a Z-Z' mixing.",
        "category": "hep"
    },
    {
        "text": "$L_{\\infty}$ Algebras and Field Theory: We review and develop the general properties of $L_\\infty$ algebras focusing\non the gauge structure of the associated field theories. Motivated by the\n$L_\\infty$ homotopy Lie algebra of closed string field theory and the work of\nRoytenberg and Weinstein describing the Courant bracket in this language we\ninvestigate the $L_\\infty$ structure of general gauge invariant perturbative\nfield theories. We sketch such formulations for non-abelian gauge theories,\nEinstein gravity, and for double field theory. We find that there is an\n$L_\\infty$ algebra for the gauge structure and a larger one for the full\ninteracting field theory. Theories where the gauge structure is a strict Lie\nalgebra often require the full $L_\\infty$ algebra for the interacting theory.\nThe analysis suggests that $L_\\infty$ algebras provide a classification of\nperturbative gauge invariant classical field theories.",
        "category": "hep"
    },
    {
        "text": "Sequential hadronization in heavy ion collisions: Heavy flavor supplies a chance to constrain and improve the hadronization\nmechanism. We have established a sequential coalescence model with charm\nconservation and applied it to the charmed hadron production in heavy ion\ncollisions. The charm conservation enhances the earlier hadron production and\nsuppresses the later production. This relative enhancement (suppression)\nchanges significantly the ratios between charmed hadrons in heavy ion\ncollisions.",
        "category": "hep"
    },
    {
        "text": "Lectures on localization and matrix models in supersymmetric\n  Chern-Simons-matter theories: In these lectures I give a pedagogical presentation of some of the recent\nprogress in supersymmetric Chern-Simons-matter theories, coming from the use of\nlocalization and matrix model techniques. The goal is to provide a simple\nderivation of the exact interpolating function for the free energy of ABJM\ntheory on the three-sphere, which implies in particular the N^{3/2} behavior at\nstrong coupling. I explain in detail part of the background needed to\nunderstand this derivation, like holographic renormalization, localization of\npath integrals, and large N techniques in matrix models",
        "category": "hep"
    },
    {
        "text": "Supersymmetry of Affine Toda Models as Fermionic Symmetry Flows of the\n  Extended mKdV Hierarchy: We couple two copies of the supersymmetric mKdV hierarchy by means of the\nalgebraic dressing technique. This allows to deduce the whole set of $(N,N)$\nsupersymmetry transformations of the relativistic sector of the extended mKdV\nhierarchy and to interpret them as fermionic symmetry flows. The construction\nis based on an extended Riemann-Hilbert problem for affine Kac-Moody\nsuperalgebras with a half-integer gradation. A generalized set of\nrelativistic-like fermionic local current identities is introduced and it is\nshown that the simplest one, corresponding to the lowest isospectral times\n$t_{\\pm 1}$ provides the supercharges generating rigid supersymmetry\ntransformations in 2D superspace. The number of supercharges is equal to the\ndimension of the fermionic kernel of a given semisimple element $E \\in\n\\widehat{\\mathfrak{g}}$ which defines both, the physical degrees of freedom and\nthe symmetries of the model. The general construction is applied to the\n$N=(1,1)$ and $N=(2,2)$ sinh-Gordon models which are worked out in detail.",
        "category": "hep"
    },
    {
        "text": "On polarized scattering equations for superamplitudes of 11D\n  supergravity and ambitwistor superstring: We revisited the formalism of 11D polarized scattering equation by Geyer and\nMason from the perspective of spinor frame approach and spinor moving frame\nformulation of the 11D ambitwistor superstring action. In particular, we\nrigorously obtain the equation for the spinor function on Riemann sphere from\nthe supertwistor form of the ambitwistor superstring action, write its general\nsolution and use it to derive the polarized scattering equation. We show that\nthe expression used by Geyer and Mason to motivate their ansatz for the\nsolution of polarized scattering equation can be obtained from our solution\nafter a suitable gauge fixing. To this end we use the hidden gauge symmetries\nof the 11D ambitwistor superstring, including $SO(16)$, and the description of\nambitwistor superstring as a dynamical system in an 11D superspace enlarged by\nbosonic directions parametrized by 517 tensorial central charge coordinates\n$Z^{\\underline{\\mu} \\underline{\\nu}}$ and\n$Z^{\\underline{\\mu}\\underline{\\nu}\\underline{\\rho}\\underline{\\sigma}\\underline{\\kappa}}$.\n  We have also found the fermionic superpartner of the polarized scattering\nequation. This happens to be a differential equation in fermionic variables\nimposed on the superamplitude, rather then just a condition on the scattering\ndata as the bosonic polarized scattering equation is.\n  D=10 case is also discussed stressing the similarities and differences with\n11D systems. The useful formulation of 10D ambitwistor superstring considers it\nas a dynamical system in superspace enlarged with 126 tensorial central charge\ncoordinates $Z^{\\mu\\nu\\rho\\sigma\\kappa}$.",
        "category": "hep"
    },
    {
        "text": "A violation of global symmetries from replica wormholes and the fate of\n  black hole remnants: We show that the presence of replica wormholes in the Euclidean path integral\nof gravity leads to a non-perturbative violation of charge conservation for any\nglobal symmetry present in the low-energy description of quantum gravity.\nExplicitly, we compute the scattering probability between different charged\nstates in several two-dimensional models of quantum gravity and find a\nnon-vanishing answer. This suggests that the set of all charged states is\ntypically over-complete, which has drastic consequences for the fate of black\nhole remnants that could carry a global symmetry charge. In the holographic\ncontext, we argue that the presence of such a symmetry in the effective\ndescription of the bulk should appear on the boundary as an emergent global\nsymmetry after ensemble averaging.",
        "category": "hep"
    },
    {
        "text": "Searching for the Higgs Boson(s): The ability of LEP-200, the Tevatron, the Di-Tevatron, the LHC, and a next\nlinear $\\epem$ collider (NLC) to probe the Higgs sectors of the minimal\nStandard Model (SM) and the Minimal Supersymmetric Model (MSSM) is reviewed.\nEmphasis is placed on newly developed detection modes and on predictions for\nsupersymmetric particle Higgs decay channels when the MSSM is constrained using\nboundary conditions motivated by supergravity/superstring models.",
        "category": "hep"
    },
    {
        "text": "Non-thermal Higgs Spectrum in Reheating Epoch: Primordial Condensate vs.\n  Stochastic Fluctuation: Since electroweak symmetry is generally broken during inflation, the Standard\nModel Higgs field can become supermassive even after the end of inflation. In\nthis paper, we study the non-thermal phase space distribution of the Higgs\nfield during reheating, focusing in particular on two different contributions:\nprimordial condensate and stochastic fluctuations. We obtain their analytic\nformulae, which agree with the previous numerical result. As a possible\nconsequence of the non-thermal Higgs spectrum, we discuss perturbative Higgs\ndecay during reheating for the case it is kinematically allowed. We find that\nthe soft-relativistic and hard spectra are dominant in the decay rate of the\nstochastic fluctuation and that the primordial condensate and stochastic\nfluctuations decay almost at the same time.",
        "category": "hep"
    },
    {
        "text": "Asymptotic description of finite lifetime effects on the photon emission\n  from a quark-gluon plasma: Direct photons play an important role as electromagnetic probes from the\nquark-gluon plasma (QGP) which occurs during ultrarelativistic heavy-ion\ncollisions. In this context, it is of particular interest how the finite\nlifetime of the QGP affects the resulting photon production. Earlier\ninvestigations on this question were accompanied by a divergent contribution\nfrom the vacuum polarization and by the remaining contributions not being\nintegrable in the ultraviolet (UV) domain. In this work, we provide a different\napproach in which we do not consider the photon number density at finite times,\nbut for free asymptotic states obtained by switching the electromagnetic\ninteraction according to the Gell-Mann and Low theorem. This procedure\neliminates a possible unphysical contribution from the vacuum polarization and,\nmoreover, renders the photon number density UV integrable. It is emphasized\nthat the consideration of free asymptotic states is, indeed, crucial to obtain\nsuch physically reasonable results.",
        "category": "hep"
    },
    {
        "text": "Holographic Calculation of BMSFT Mutual and 3-partite Information: We use flat-space holography to calculate the mutual information and the\n3-partite information of a two-dimensional BMS-invariant field theory\n(BMSFT$_2$). This theory is the putative holographic dual of the\nthree-dimensional asymptotically flat spacetimes. We find a bound in which\nentangling transition occurs for zero and finite temperature BMSFTs. We also\nshow that the holographic 3-partite information is always non-positive which\nindicates that the holographic mutual information is monogamous.",
        "category": "hep"
    },
    {
        "text": "Prospects for improved $\u039b_c$ branching fractions: The experimental uncertainty on the branching fraction $\\b(\\Lambda_c \\to p\nK^- \\pi^+) = (5.0 \\pm 1.3)%$ has not decreased since 1998, despite a much\nlarger data sample. Uncertainty in this quantity dominates that in many other\nquantities, including branching fractions of $\\Lambda_c$ to other modes,\nbranching fractions of $b$-flavored baryons, and fragmentation fractions of\ncharmed and bottom quarks. Here we advocate a lattice QCD calculation of the\nform factors in $\\Lambda_c \\to \\Lambda \\ell^+ \\nu_\\ell$ (the case $\\ell = e^+$\nis simpler as the mass of the lepton can be neglected). Such a calculation\nwould yield an absolute prediction for the rate for $\\Lambda_c \\to \\Lambda\n\\ell^+ \\nu_\\ell$. When combined with the $\\Lambda_c$ lifetime, it could provide\na calibration for an improved set of $\\Lambda_c$ branching fractions as long as\nthe accuracy exceeds about 25%.",
        "category": "hep"
    },
    {
        "text": "Transverse Energy Flow with Forward and Central Jets at the LHC: At the LHC, using forward + central detectors, it becomes possible for the\nfirst time to carry out measurements of the transverse energy flow due to\n``minijets\" accompanying production of two jets separated by a large rapidity\ninterval. We discuss parton-shower calculations of energy flow observables in a\nhigh-energy factorized Monte Carlo framework, and comment on the role of these\nobservables to study high parton multiplicity effects.",
        "category": "hep"
    },
    {
        "text": "The LHC diphoton resonance and dark matter: A Higgs-like resonance with a mass of approximately 750 GeV has recently been\nobserved at the LHC in its diphoton decay. If this state is not simply a\nstatistical fluctuation which will disappear with more data, it will have\nimportant implications not only for particle physics but also for cosmology. In\nthis note, we analyze the implications of such a resonance for the dark matter\n(DM). Assuming a spin 1/2 DM particle, we first verify that indeed the correct\nrelic density can be obtain for a wide range of the particle mass and weak\nscale coupling that are compatible with present data. We then show that the\ncombination of near future direct and indirect detection experiments will allow\nto probe the CP-nature of the mediator resonance, i.e. check whether it is a\nscalar or a pseudoscalar like particle.",
        "category": "hep"
    },
    {
        "text": "Non-Abelian Vortices without Dynamical Abelianization: Vortices carrying truly non-Abelian flux moduli, which do not dynamically\nreduce to Abelian vortices, are found in the context of softly-broken ${\\cal\nN}=2$ supersymmetric chromodynamics (SQCD). By tuning the bare quark masses\nappropriately we identify the vacuum in which the underlying SU(N) gauge group\nis partially broken to $SU(n) \\times SU(r) \\times U(1)/{\\mathbbm Z}_{K}$, where\n$K$ is the least common multiple of $(n, r)$, and with $N_{f}^{su(n)}=n$ and\n$N_{f}^{su(r)}=r$ flavors of light quark multiplets. At much lower energies the\ngauge group is broken completely by the squark VEVs, and vortices develop which\ncarry non-Abelian flux moduli $CP^{n-1}\\times CP^{r-1}$. For $n>r$ we argue\nthat the SU(n) fluctuations become strongly coupled and Abelianize, while\nleaving weakly fluctuating $SU(r)$ flux moduli. This allows us to recognize the\nsemi-classical origin of the light non-Abelian monopoles found earlier in the\nfully quantum-mechanical treatment of 4D SQCD.",
        "category": "hep"
    },
    {
        "text": "$h$-Deformation as a Contraction of $q$-Deformation: We show that $h$-deformation can be obtained, by a singular limit of a\nsimilarity transformation, from $q$-deformation; to be specefic, we obtain\n$\\GL_h(2)$, its differential structure, its inhomogenous extension, and\n$\\Uh{\\sl(2)}$ from their $q$-deformed counterparts.",
        "category": "hep"
    },
    {
        "text": "Renormalization in Large Momentum Effective Theory of Parton Physics: In the large-momentum effective field theory approach to parton physics, the\nmatrix elements of non-local operators of quark and gluon fields, linked by\nstraight Wilson lines in a spatial direction, are calculated in lattice quantum\nchromodynamics as a function of hadron momentum. Using the heavy-quark\neffective theory formalism, we show a multiplicative renormalization of these\noperators at all orders in perturbation theory, both in dimensional and lattice\nregularizations. The result provides a theoretical basis for extracting parton\nproperties through properly renormalized observables in Monte Carlo\nsimulations.",
        "category": "hep"
    },
    {
        "text": "Searching for physics beyond the Standard Model in the decay B+ ->\n  K+K+pi-: The observation potential of the decay B+ -> K+K+pi- with the ATLAS detector\nat LHC is described in this paper. In the Standard Model this decay mode is\nhighly suppressed, while in models beyond the Standard Model it could be\nsignificantly enhanced. To improve the selection of the K+K+pi- final state, a\ncharged hadron identification using Time-over-Threshold measurements in the\nATLAS Transition Radiation Tracker was developed and used.",
        "category": "hep"
    },
    {
        "text": "Production and Decay of Di-photon Resonance at Future $e^+e^-$ Colliders: Motivated by the ATLAS and CMS announcements of the excesses of di-photon\nevents, we discuss the production and decay processes of di-photon resonance at\nfuture $e^+e^-$ colliders. We assume that the excess of the di-photon events at\nthe LHC is explained by a scalar resonance decaying into a pair of photons. In\nsuch a case, the scalar interacts with standard model gauge bosons and,\nconsequently, the production of such a scalar is possible at the $e^+e^-$\ncolliders. We study the production of the scalar resonance via the associated\nproduction with photon or $Z$, as well as via the vector-boson fusion, and\ncalculate the cross sections of these processes. We also study the backgrounds,\nand discuss the detectability of the signals of scalar production with various\ndecay processes of the scalar resonance. We also consider the case where the\nscalar resonance has an invisible decay mode, and study how the invisible decay\ncan be observed at the $e^+e^-$ colliders.",
        "category": "hep"
    },
    {
        "text": "Anomaly and long-range forces: We consider infrared dependences of chiral effects, like chiral magnetic\neffect, in chiral media. The main observation is that there exist competing\ninfrared-sensitive parameters, sometimes not apparent. The value of the chiral\neffects depends in fact on the actual hierarchy of the parameters. Some\nexamples have been already given in the literature. We argue that\nmagnetostatics of chiral media with a non-vanishing chiral chemical potential\n$\\mu_5\\neq 0$ is also infrared sensitive. In particular, the system turns to be\nunstable if the volume is large enough. The instability is with respect to the\ndecay of the system into domains of non-vanishing magnetic field with\nnon-trivial helicity.",
        "category": "hep"
    },
    {
        "text": "The Feynman Variational Principle in the Worldline Representation of\n  Field Theory: Following Feynman's treatment of the non-relativistic polaron problem,\nsimilar techniques are used to study relativistic field theories: after\nintegrating out the bosonic degrees of freedom the resulting effective action\nis formulated in terms of particle trajectories (worldlines) instead of field\noperators. The Green functions of the theory are then approximated\nvariationally on the pole of the external particles by using a retarded\nquadratic trial action. Application to a scalar theory gives non-perturbative,\ncovariant results for vertex functions and scattering processes. Recent\nprogress in dealing with the spin degrees of freedom in fermionic systems, in\nparticular Quantum Electrodynamics, is discussed. We evaluate the averages\nneeded in the Feynman variational principle for a general quadratic trial\naction and study the structure of the dressed fermion propagator.",
        "category": "hep"
    },
    {
        "text": "Search for the double-charmonium state with $\u03b7_c J/\u03c8$ at Belle: We measure the cross section of $e^+e^-\\rightarrow\\eta_c J/\\psi$ at the\n$\\Upsilon(nS) (n=1$ -- $5)$ on-resonance and 10.52 GeV off-resonance energy\npoints using the full data sample collected by the Belle detector with an\nintegrated luminosity of $955~\\rm fb^{-1}$. We also search for double\ncharmonium production in $e^+e^-\\rightarrow\\eta_c J/\\psi$ via initial state\nradiation near the $\\eta_c J/\\psi$ threshold. No evident signal of the double\ncharmonium state is found, but evidence for the $e^+e^-\\rightarrow\\eta_c\nJ/\\psi$ process is found with a statistical significance greater than\n$3.3\\sigma$ near the $\\eta_c J/\\psi$ threshold. The average cross section near\nthe threshold is measured and upper limits of cross sections are set for other\nregions.",
        "category": "hep"
    },
    {
        "text": "A $\u03bd$ Approach to Analyzing Neutrino Data in the\n  $\\mathbf{R}$-Parity-Violating MSSM: The $R$-parity-violating Minimal Supersymmetric Standard Model (RPV-MSSM) can\nnaturally accommodate massive neutrinos as required by the oscillation data.\nHowever, studying the phenomenology is complicated due to the large number of\nundetermined parameters involved. Thus, studies are usually restricted to\nspecific submodels. In this work, we develop an approach that allows us to be\nless restrictive. Working in (almost) the completely general RPV-MSSM setting,\nwe analyze the structure of the neutrino mass matrix, and identify -- for the\ncase of two massive neutrinos -- only four minimal classes of structures that\ncan solve the neutrino data; we call these Minimal Oscillation Models (MOMs).\nWe study the general features of each MOM class, and present numerical fits to\nthe oscillation data. Our approach allows us to study all RPV models satisfying\nthe neutrino data in a unified manner, as long as they satisfy the MOM\ncriteria. Through several examples, we show that this indeed holds for many\ninteresting scenarios.",
        "category": "hep"
    },
    {
        "text": "The Ultraviolet Properties of N=4 Supergravity at Four Loops: We demonstrate that pure N=4 supergravity is ultraviolet divergent at four\nloops. The form of the divergence suggests that it is due to the rigid U(1)\nduality-symmetry anomaly of the theory. This is the first known example of an\nultraviolet divergence in a pure ungauged supergravity theory in four\ndimensions. We use the duality between color and kinematics to construct the\nintegrand of the four-loop four-point amplitude, whose ultraviolet divergence\nis then extracted by standard integration techniques.",
        "category": "hep"
    },
    {
        "text": "Reconstruction of moments of particle distributions with Identity Method\n  at MPD: Precise determination of the moments of multiplicity distributions of\nidentified particles could be challenging due to the misidentification in\ndetectors. The so-called Identity Method allows one to solve this problem. In\nthis contribution, performance of the Identity Method was tested on the A-A\nevents simulated in the conditions of the MPD experiment at NICA. With this\nmethod, moments within a single kinematic window as well as coefficients of\nforward-backward pseudorapidity correlations are extracted.",
        "category": "hep"
    },
    {
        "text": "Alternativity and reciprocity in the Cayley-Dickson algebra: We calculate the eigenvalue \\rho of the multiplication mapping R on the\nCayley-Dickson algebra A_n. If the element in A_n is composed of a pair of\nalternative elements in A_{n-1}, half the eigenvectors of R in A_n are still\neigenvectors in the subspace which is isomorphic to A_{n-1}.\n  The invariant under the reciprocal transformation A_n \\times A_{n} \\ni (x,y)\n-> (-y,x) plays a fundamental role in simplifying the functional form of \\rho.\n  If some physical field can be identified with the eigenspace of R, with an\ninjective map from the field to a scalar quantity (such as a mass) m, then\nthere is a one-to-one map \\pi: m \\mapsto \\rho. As an example, the electro-weak\ngauge field can be regarded as the eigenspace of R, where \\pi implies that the\nW-boson mass is less than the Z-boson mass, as in the standard model.",
        "category": "hep"
    },
    {
        "text": "Searching for new homogeneous sine-Gordon theories using T-duality\n  symmetries: The Homogeneous sine-Gordon (HSG) theories are integrable perturbations of\n$G_k/U(1)^{r_G}$ coset CFTs, where $G$ is a simple compact Lie group of rank\n$r_G$ and $k>1$ is an integer. Using their T-duality symmetries, we investigate\nthe relationship between the different theories corresponding to a given coset,\nand between the different phases of a particular theory. Our results suggest\nthat for $G=SU(n)$ with $n\\geq5$ and $E_6$ there could be two non-equivalent\nHSG theories associated to the same coset, one of which has not been considered\nso far.",
        "category": "hep"
    },
    {
        "text": "Geometrical aspects of chiral anomalies in the overlap: The set of one dimensional lowest energy eigenspaces used to construct the\noverlap induces a two form on gauge orbit space which is the locally exact curl\nof Berry's connection. If anomalies do not cancel, examples of two dimensional\nclosed sub-manifolds of orbit space are produced over which the integral of the\nabove two form does not vanish. Based on these observations, a natural\ndefinition of covariant currents is obtained, a simple way to calculate chiral\nanomalies on the lattice is found, and indications for how to construct an\nideal regularization of chiral gauge theories are seen to emerge.",
        "category": "hep"
    },
    {
        "text": "Landau levels for graphene layers in noncommutative plane: Starting from the zero modes of the single and bilayer graphene Hamiltonians\nwe develop a mechanism to construct the eigenstates and eigenenergies for\nLandau levels in noncommutative plane. General formulas for the spectrum of\nenergies are deduced, for both cases, single and bilayer graphene. In both\ncases we find that the effect to introduce noncommutative coordinates is a\nshift in the energy spectrum with respect to result obtained in commutative\nspace.",
        "category": "hep"
    },
    {
        "text": "Large spin limit of AdS_5 x S^5 string theory and low energy expansion\n  of ferromagnetic spin chains: By considering AdS_5 x S^5 string states with large angular momenta in S^5\none is able to provide non-trivial quantitative checks of the AdS/CFT duality.\nA string rotating in S^5 with two angular momenta J_1,J_2 is dual to an\noperator in N=4 SYM theory whose conformal dimension can be computed by\ndiagonalizing a (generalization of) spin 1/2 Heisenberg chain Hamiltonian. It\nwas recently argued and verified to lowest order in a large J=J_1+J_2\nexpansion, that the Heisenberg chain can be described using a non-relativistic\nlow energy effective 2-d action for a unit vector field n_i which exactly\nmatches the corresponding large J limit of the classical AdS_5 x S^5 string\naction. In this paper we show that this agreement extends to the next order and\ndevelop a systematic procedure to compute higher orders in such large angular\nmomentum expansion. This involves several non-trivial steps. On the string\nside, we need to choose a special gauge with a non-diagonal world-sheet metric\nwhich insures that the angular momentum is uniformly distributed along the\nstring, as indeed is the case on the spin chain side. We need also to implement\nan order by order redefinition of the field n_i to get an action linear in the\ntime derivative. On the spin chain side, it turns out to be crucial to include\nthe effects of integrating out short wave-length modes. In this way we gain a\nbetter understanding of how (a subsector of) the string sigma model emerges\nfrom the dual gauge theory, allowing us to demonstrate the duality beyond\ncomparing particular examples of states with large J.",
        "category": "hep"
    },
    {
        "text": "The DUNE Far Detector Vertical Drift Technology, Technical Design Report: DUNE is an international experiment dedicated to addressing some of the\nquestions at the forefront of particle physics and astrophysics, including the\nmystifying preponderance of matter over antimatter in the early universe. The\ndual-site experiment will employ an intense neutrino beam focused on a near and\na far detector as it aims to determine the neutrino mass hierarchy and to make\nhigh-precision measurements of the PMNS matrix parameters, including the\nCP-violating phase. It will also stand ready to observe supernova neutrino\nbursts, and seeks to observe nucleon decay as a signature of a grand unified\ntheory underlying the standard model.\n  The DUNE far detector implements liquid argon time-projection chamber\n(LArTPC) technology, and combines the many tens-of-kiloton fiducial mass\nnecessary for rare event searches with the sub-centimeter spatial resolution\nrequired to image those events with high precision. The addition of a photon\ndetection system enhances physics capabilities for all DUNE physics drivers and\nopens prospects for further physics explorations. Given its size, the far\ndetector will be implemented as a set of modules, with LArTPC designs that\ndiffer from one another as newer technologies arise.\n  In the vertical drift LArTPC design, a horizontal cathode bisects the\ndetector, creating two stacked drift volumes in which ionization charges drift\ntowards anodes at either the top or bottom. The anodes are composed of\nperforated PCB layers with conductive strips, enabling reconstruction in 3D.\nLight-trap-style photon detection modules are placed both on the cryostat's\nside walls and on the central cathode where they are optically powered.\n  This Technical Design Report describes in detail the technical\nimplementations of each subsystem of this LArTPC that, together with the other\nfar detector modules and the near detector, will enable DUNE to achieve its\nphysics goals.",
        "category": "hep"
    },
    {
        "text": "A Renormalization Group Approach to A Yang-Mills Two Matrix Model: A Yang-Mills type two matrix model with mass terms is studied by use of a\nmatrix renormalization group approach proposed by Brezin and Zinn-Justin. The\nrenormalization group method indicates that the model exhibits a critical\nbehavior similar to that of two dimensional Euclidean gravity. A massless limit\nand the generation of quadratic terms along the renormalization group flow are\ndiscussed.",
        "category": "hep"
    },
    {
        "text": "Transverse Momentum Dependent Distributions in Hadronic Collisions:\n  p(transv. polarized) p --> D + X and p(transv. polarized) p --> gamma + X: Our understanding of the transverse spin structure of hadrons might\ndefinitely get improved by the information we gather on transverse momentum\ndependent (TMD) distributions. These new functions could also be crucial for a\ndescription of the observed transverse single spin asymmetries (SSA). In a hard\nscattering model for inclusive hadronic reactions, based on a generalized QCD\nfactorization scheme, many mechanisms - namely the Sivers, Collins,\nBoer-Mulders effects - might contribute to a SSA. We show how the k_T dependent\nphases arising from the partonic kinematics together with a suitable choice of\nexperimental configurations could help in disentangling the above mentioned\neffects. We discuss their potential role in two inclusive hadronic processes:\nheavy meson and photon production in pp and p pbar collisions.",
        "category": "hep"
    },
    {
        "text": "Gravitational Black Hole Hair from Event Horizon Supertranslations: We discuss BMS supertranslations both at null-infinity and on the horizon for\nthe case of the Schwarzschild black hole. We show that both kinds of\nsupertranslations lead to infinetly many gapless physical excitations. On this\nbasis we construct a quotient algebra using suited superpositions of both kinds\nof transformations which cannot be compensated by an ordinary\nBMS-supertranslation and therefore are intrinsically due to the presence of an\nevent horizon. We show that these quotient transformations are physical and\ngenerate gapless excitations on the horizon that can account for the\ngravitational hair as well as for the black hole entropy. We identify the\nphysics of these modes as associated with Bogolioubov-Goldstone modes due to\nquantum criticality. Classically the number of these gapless modes is infinite.\nHowever, we show that due to quantum criticality the actual amount of\ninformation-carriers becomes finite and consistent with Bekenstein entropy.\nAlthough we only consider the case of Schwarzschild geometry, the arguments are\nextendable to arbitrary space-times containing event horizons.",
        "category": "hep"
    },
    {
        "text": "Loop effects on the Higgs decay widths in extended Higgs models: In order to identify the Higgs sector using future precision data, we\ncalculate the partial decay widths of the discovered Higgs boson with the mass\nof 125 GeV into fermion pairs and gauge-boson pairs with one-loop electroweak\nand one-loop QCD corrections in various extended Higgs models, such as the\nHiggs singlet model and four types of two Higgs doublet models. In the\ntree-level analysis, the patterns of deviations from the standard model\npredictions in the partial decay widths for various decay modes are distinctive\nfor each model, due to the mixing of the Higgs boson with other neutral\nscalars. Our present analysis shows that even with a full set of radiative\ncorrections we can discriminate these extended Higgs models via the partial\ndecay widths as long as any of the deviations is detected at future precision\nmeasurements. Furthermore, we quantitatively show that in each model the\nmagnitude of the deviations can provide important information on the mass scale\nof extra Higgs bosons under the theoretical constraints from perturbative\nunitary and vacuum stability, which can be obtained without discovery of the\nadditional Higgs bosons.",
        "category": "hep"
    },
    {
        "text": "Applications of intersection numbers in physics: In this review I discuss intersection numbers of twisted cocycles and their\nrelation to physics. After defining what these intersection number are, I will\nfirst discuss a method for computing them. This is followed by three examples\nwhere intersection numbers appear in physics. These examples are: tree-level\nscattering amplitudes within the the CHY-formalism, reduction of Feynman\nintegrals to master integrals and correlation functions on the lattice.",
        "category": "hep"
    },
    {
        "text": "Topologically Induced Instability in String Theory: Using the generalised AdS/CFT correspondence, we show that there are certain\nten-dimensional differentiable manifolds such that string theory on such a\nmanifold is unstable [to the emission of \"large branes\"] no matter what the\nmetric may be. The instability is thus due to the [differential] topology of\nthe manifold, not to any particular choice of its geometry. We propose a\nprecise criterion for this \"topology selection mechanism\", and prove it in many\ncases. The techniques employed may be useful in more general cases.",
        "category": "hep"
    },
    {
        "text": "Anisotropic Inflation with General Potentials: Anomalies in recent observational data indicate that there might be some\n\"anisotropic hair\" generated in an inflation period. To obtain general\ninformation about the effects of this anisotropic hair to inflation models, we\nstudied anisotropic inflation models that involve one vector and one scalar\nusing several types of potentials. We determined the general relationship\nbetween the degree of anisotropy and the fraction of the vector and scalar\nfields, and concluded that the anisotropies behave independently of the\npotentials. We also generalized our study to the case of multi-directional\nanisotropies.",
        "category": "hep"
    },
    {
        "text": "Self-Gravitational Corrections to the Cardy-Verlinde Formula and the FRW\n  Brane Cosmology in SdS_5 Bulk: The semiclassical corrections to the Cardy-Verlinde entropy of a\nfive-dimensional Schwarzschild de-Sitter black hole (SdS_5) are explicitly\nevaluated. These corrections are considered within the context of KKW analysis\nand arise as a result of the self-gravitation effect. In addition, a\nfour-dimensional spacelike brane is considered as the boundary of the SdS_5\nbulk background. It is already known that the induced geometry of the brane is\nexactly given by that of a radiation-dominated FRW universe. By exploiting the\nCFT/FRW-cosmology relation, we derive the self-gravitational corrections to the\nfirst Friedmann-like equation which is the equation of the brane motion. The\nadditional term that arises due to the semiclassical analysis can be viewed as\nstiff matter where the self-gravitational corrections act as the source for it.\nThis result is contrary to standard analysis that regards the charge of SdS_5\nbulk black hole as the source for stiff matter. Furthermore, we rewrite the\nFriedmann-like equation in a such way that it represents the conservation\nequation of energy of a point particle moving in a one-dimensional effective\npotential. The self-gravitational corrections to the effective potential and,\nconsequently, to the point particle's motion are obtained. A short analysis on\nthe asymptotic behavior of the 4-dimensional brane is presented.",
        "category": "hep"
    },
    {
        "text": "A Fake Split Supersymmetry Model for the 126 GeV Higgs: We consider a scenario where supersymmetry is broken at a high energy scale,\nout of reach of the LHC, but leaves a few fermionic states at the TeV scale.\nThe particle content of the low-energy effective theory is similar to that of\nSplit Supersymmetry. However, the gauginos and higgsinos are replaced by\nfermions carrying the same quantum numbers but having different couplings,\nwhich we call fake gauginos and fake higgsinos. We study the prediction for the\nlight-Higgs mass in this Fake Split SUSY Model (FSSM). We find that, in\ncontrast to Split or high-scale supersymmetry, a 126 GeV Higgs boson is easily\nobtained even for arbitrarily high values of the supersymmetry scale. For a\nsupersymmetry scale greater than roughly 100 PeV, the Higgs mass is almost\nindependent of the supersymmetry scale and the stop mixing parameter, while the\nobserved value is achieved for tan beta between 1.3 and 1.8 depending on the\ngluino mass.",
        "category": "hep"
    },
    {
        "text": "Proceedings of 15th conference on Elastic and Diffractive scattering\n  (EDS Blois 2013): This volume represents the proceedings of the 15th conference on Elastic and\nDiffractive scattering, EDS Blois 2013. The conference was held in Saariselka,\nFinland on September 9th-13th, 2013.",
        "category": "hep"
    },
    {
        "text": "Forward jet-like event spin-dependent properties in polarized p+p\n  collisions at $\\sqrt{s}$=200 GeV: The STAR collaboration has reported precision measurements on the transverse\nsingle spin asymmetries for the production of forward $\\pi^0$ mesons from\npolarized proton collisions at $\\sqrt{s} =\\,$200 GeV. To disentangle the\ncontributions to forward asymmetries, one has to look beyond inclusive $\\pi^0$\nproduction to the production of forward jets or direct photons. Present forward\ndetector capabilities are not well matched to the complete reconstruction of\nforward jets, but do have sufficient acceptance for \"jet-like\" events.\n\"Jet-like\" events are the clustered response of an electromagnetic calorimeter\nthat is primarily sensitive to incident photons, electrons and positrons.\n  During the RHIC running in the year 2006, STAR with the Forward Pion Detector\n(FPD++) in place collected 6.8 pb$^{-1}$ of data with an average polarization\nof 60%. FPD++ was a modular detector prototype of the Forward Meson\nSpectrometer (FMS) that consisted of two detectors placed symmetrically with\nrespect to the beam line at a distance of 7.4 m from the interaction point.\nReadout of the FPD++ was triggered when the sum of energies in the central\nmodule of the calorimeter used for $\\pi^0$ measurements was larger than a\nthreshold. This trigger minimizes the bias for \"jet-like\" events, making it\nappropriate to disentangling contributions to the forward transverse spin\nasymmetries. We report on the status of the analysis.",
        "category": "hep"
    },
    {
        "text": "Dimensional Transmutation and Dimensional Regularization in Quantum\n  Mechanics. I. General Theory: This is the first in a series of papers addressing the phenomenon of\ndimensional transmutation in nonrelativistic quantum mechanics within the\nframework of dimensional regularization. Scale-invariant potentials are\nidentified and their general properties are derived. A strategy for dimensional\nrenormalization of these systems in the strong-coupling regime is presented,\nand the emergence of an energy scale is shown, both for the bound-state and\nscattering sectors. Finally, dimensional transmutation is explicitly\nillustrated for the two-dimensional delta-function potential.",
        "category": "hep"
    },
    {
        "text": "Living on the edge in a spacetime with multiple warping: The Randall-Sundrum warped braneworld model is generalised to six and higher\ndimensions such that the warping has a non-trivial dependence on more than one\ndimension. This naturally leads to a brane-box like configuration alongwith\nscalar fields with possibly interesting cosmological roles. Also obtained\nnaturally are two towers of 3 branes with mass scales clustered around either\nof Planck scale and TeV scale. Such a scenario has interesting phenomenological\nconsequences including an explanation for the observed hierarchy in the masses\nof standard model fermions.",
        "category": "hep"
    },
    {
        "text": "Strong field limit of the Born-Infeld p-form electrodynamics: We study the strong field limit of p-form Born-Infeld theory. It turns out\nthat this limiting theory is a unique theory displaying the full symmetry group\nof the underlying canonical structure. Moreover, being a nonlinear theory, it\npossesses an infinite hierarchy of conservation laws.",
        "category": "hep"
    },
    {
        "text": "Renormalization of Lorentz violating theories: We classify the unitary, renormalizable, Lorentz violating quantum field\ntheories of interacting scalars and fermions, obtained improving the behavior\nof Feynman diagrams by means of higher space derivatives. Higher time\nderivatives are not generated by renormalization. Renormalizability is ensured\nby a \"weighted power counting\" criterion. The theories contain a dimensionful\nparameter, yet a set of models are classically invariant under a weighted scale\ntransformation, which is anomalous at the quantum level. Formulas for the\nweighted trace anomaly are derived. The renormalization-group properties are\nstudied.",
        "category": "hep"
    },
    {
        "text": "Observation of a new $\u039e_b^0$ state: Using a proton-proton collision data sample collected by the LHCb experiment,\ncorresponding to an integrated luminosity of 8.5 fb$^{-1}$, the observation of\na new excited $\\Xi_b^0$ resonance decaying to the $\\Xi_b^-\\pi^+$ final state is\npresented. The state, referred to as $\\Xi_b(6227)^0$, has a measured mass and\nnatural width of\n  $m(\\Xi_b(6227)^0) = 6227.1^{\\,+1.4}_{\\,-1.5}\\pm0.5$ MeV,\n  $\\Gamma(\\Xi_b(6227)^0) = 18.6^{\\,+5.0}_{\\,-4.1}\\pm1.4$ MeV, where the\nuncertainties are statistical and systematic. The production rate of the\n$\\Xi_b(6227)^0$ state relative to that of the $\\Xi_b^-$ baryon in the kinematic\nregion $2<\\eta<5$ and $p_{\\rm T}<30$ GeV is measured to be\n  $\\frac{f_{\\Xi_b(6227)^0}}{f_{\\Xi_b^-}}{\\mathcal{B}}(\\Xi_b(6227)^0\\to\\Xi_b^-\\pi^+)\n= 0.045\\pm0.008\\pm0.004$, where ${\\mathcal{B}}(\\Xi_b(6227)^0\\to\\Xi_b^-\\pi^+)$\nis the branching fraction of the decay, and $f_{\\Xi_b(6227)^0}$ and\n$f_{\\Xi_b^-}$ represent fragmentation fractions.\n  Improved measurements of the mass and natural width of the previously\nobserved $\\Xi_b(6227)^-$ state, along with the mass of the $\\Xi_b^-$ baryon,\nare also reported. Both measurements are significantly more precise than, and\nconsistent with, previously reported values.",
        "category": "hep"
    },
    {
        "text": "Thermal power spectrum in the CFT driven cosmology: We present an overview of the recently suggested cosmological model driven by\nconformal field theory (CFT) with the initial conditions in the form of the\nmicrocanonical density matrix. In particular, we discuss the origin of\ninflationary stage in this model and a novel feature -- the thermal nature of\nthe primordial power spectrum of the CMB anisotropy. The relevant effect of\n\"temperature of the relic temperature anisotropy\" can be responsible for a\nthermal contribution to the red tilt of this spectrum, additional to its\nconventional vacuum component. The amplification of this effect due to recently\nestablished $a$-theorem in CFT is briefly discussed.",
        "category": "hep"
    },
    {
        "text": "Nucleon Magnetic Moments and Electric Polarizabilities: Electromagnetic properties of the nucleon are explored with lattice QCD using\na novel technique. Focusing on background electric fields, we show how the\nelectric polarizability can be extracted from nucleon correlation functions. A\ncrucial step concerns addressing contributions from the magnetic moment, which\naffects the relativistic propagation of nucleons in electric fields. By\nproperly handing these contributions, we can determine both magnetic moments\nand electric polarizabilities. Lattice results from anisotropic clover lattices\nare presented. Our method is not limited to the neutron; we show results for\nthe proton as well.",
        "category": "hep"
    },
    {
        "text": "Kinetic theory of a longitudinally expanding system: We use kinetic theory in order to study the role of quantum fluctuations in\nthe isotropization of the pressure tensor in a system subject to fast\nlongitudinal expansion, such as the matter produced in the early stages of a\nheavy ion collision.",
        "category": "hep"
    },
    {
        "text": "The bottomonium spectrum at finite temperature from $N_f=2+1$ lattice\n  QCD: We present results on the bottomonium spectrum at temperatures above and\nbelow the deconfinement crossover temperature, $T_c$, from dynamical lattice\nQCD simulations. The heavy quark is treated with a non-relativistic effective\nfield theory on the lattice and serves as a probe of the hot medium. Ensembles\nwith a finer spatial lattice spacing and a greater range of temperatures below\n$T_c$ than those previously employed by this collaboration are used. In\naddition, there are $N_f=2+1$ flavours of Wilson clover quark in the sea with\n$M_\\pi\\approx400$ MeV and we perform a more careful tuning of the bottom quark\nmass in this work. We calculate the spectral functions of S and P wave\nbottomonium states using the maximum entropy method and confirm earlier\nfindings on the survival of the ground state S wave states up to at least\n$2T_c$ and the immediate dissociation of the P wave states above $T_c$.",
        "category": "hep"
    },
    {
        "text": "Interplay of Infrared Divergences and Gauge-Dependence of the Effective\n  Potential: The perturbative effective potential suffers infrared (IR) divergences in\ngauges with massless Goldstones in their minima (like Landau or Fermi gauges)\nbut the problem can be fixed by a suitable resummation of the Goldstone\npropagators. When the potential minimum is generated radiatively,\ngauge-independence of the potential at the minimum also requires resummation\nand we demonstrate that the resummation that solves the IR problem also cures\nthe gauge-dependence issue, showing this explicitly in the Abelian Higgs model\nin Fermi gauge. In the process we find an IR divergence (in the location of the\nminimum) specific to Fermi gauge and not appreciated in recent literature. We\nshow that physical observables can still be computed in this gauge and we\nfurther show how to get rid of this divergence by a field redefinition. All\nthese results generalize to the Standard Model case.",
        "category": "hep"
    },
    {
        "text": "A relation between CP violation of low energy and leptogenesis: We discuss how CP violation generating lepton number asymmetry can be related\nto CP violation in low energy.",
        "category": "hep"
    },
    {
        "text": "QCD Corrections to Higgs Boson Production: We discuss the ${\\cal O}(\\alpha_s)$\n  QCD radiative corrections to Higgs boson production in the limit in which the\ntop quark is much heavier than the Higgs boson. The subleading corrections, of\n${\\cal O} (\\alpha_s M_H^2/M_{\\rm top}^2)$, are presented for the decay\n$H\\rightarrow \\gamma\\gamma$ and shown to be small.",
        "category": "hep"
    },
    {
        "text": "Real next-to-next-to-leading-order QCD corrections to J/psi and Upsilon\n  hadroproduction in association with a photon: We update the study of the QCD corrections to direct J/psi and Upsilon\nhadroproduction in association with a photon in the QCD-based approach of the\nColour-Singlet (CS) Model. After comparison with the recent full\nnext-to-leading-order (NLO) computation for this process, we provide an\nindependent confirmation to the inclusive case that NLO QCD corrections to\nquarkonium-production processes whose LO exhibits a non-leading P_T behaviour\ncan be reliably computed at mid and large P_T by considering only the real\nemission contributions accompanied with a kinematical cut. In turn, we evaluate\nthe leading part of the alpha^4_S alpha contributions, namely those coming from\n(J/psi,Upsilon)+gamma associated with two light partons. We find that they are\ndominant at mid and large P_T. This confirms our expectations from the leading\nP_T scaling of the new topologies appearing at NNLO. We obtain that the yield\nfrom the CS becomes one order of magnitude larger than the upper value of the\npotential Colour-Octet yield. The polarization of the 3S1 quarkonia produced in\nassociation with a photon is confirmed to be longitudinal at mid and large P_T.",
        "category": "hep"
    },
    {
        "text": "Towards Order alpha_s^4 Accuracy in tau-decays: Recently computed terms of orders O(\\alpha_s^4 n_f^2) in the perturbative\nseries for the tau decay rate, and similar (new) strange quark mass\ncorrections, are used to discuss the validity of various optimization schemes.\nThe results are then employed to arrive at improved predictions for the\ncomplete terms order O(\\alpha_s^4) and O(\\alpha_s^5) in the massless limit as\nwell as for terms due to the strange quark mass. Phenomenological implications\nare presented.",
        "category": "hep"
    },
    {
        "text": "Brown-Teitelboim Instantons and the First Law of Thermodynamics of\n  (Anti) de Sitter Space: We study the instantons (or bounces) in the Brown-Teitelboim (BT) mechanism\nof relaxation of cosmological constant which is a cosmological version of the\nSchwinger mechanism. The BT mechanism is a false vacuum decay of (A)dS$_{d+1}$\n(and $R^{1, d}$) spaces via spontaneous nucleations of spherical $(d-1)$-branes\nand thus ostensibly has bearings on (A)dS$_{d+1}$/CFT$_d$ holography. In this\npaper we focus on the four-dimensional case, although the higher or\nlower-dimensional generalization is straightforward. As is the case with pair\nproductions near black hole and de Sitter horizons, we show that the BT\ninstanton action for a membrane nucleation encodes the first law of\nthermodynamics of (Anti) de Sitter space. In particular, the membrane instanton\nprecisely accounts for the change of entropy of (A)dS space before and after\nnucleation, in good accordance with AdS$_{d+1}$/CFT$_d$ in which the\n$(d-1)$-branes make up all degrees of freedom of AdS$_{d+1}$ space. In light of\nthis lesser-known perspective presented here we also make remarks on (1)\n(A)dS/CFT and (2) complexity. For the complexity we observe that the Lorentzian\nbounce action may have close connection to complexity.",
        "category": "hep"
    },
    {
        "text": "On Quiver W-algebras and Defects from Gauge Origami: In this note, using Nekrasov's gauge origami framework, we study two\ndifferent versions of the the BPS/CFT correspondence - first, the standard AGT\nduality and, second, the quiver W algebra construction which has been developed\nrecently by Kimura and Pestun. The gauge origami enables us to work with both\ndualities simultaneously and find exact matchings between the parameters. In\nour main example of an A-type quiver gauge theory, we show that the\ncorresponding quiver qW-algebra and its representations are closely related to\na large-n limit of spherical gl(n) double affine Hecke algebra whose modules\nare described by instanton partition functions of a defect quiver theory.",
        "category": "hep"
    },
    {
        "text": "Stuckelberg Axions and the Effective Action of Anomalous Abelian Models\n  1. A unitarity analysis of the Higgs-axion mixing: We analyze the quantum consistency of anomalous abelian models and of their\neffective field theories, rendered anomaly-free by a Wess-Zumino term, in the\ncase of multiple abelian symmetries. These models involve the combined\nHiggs-Stuckelberg mechanism and predict a pseudoscalar axion-like field that\nmixes with the goldstones of the ordinary Higgs sector. We focus our study on\nthe issue of unitarity of these models both before and after spontaneous\nsymmetry breaking and detail the set of Ward identities and the organization of\nthe loop expansion in the effective theory. The analysis is performed on simple\nmodels where we show, in general, the emergence of new effective vertices\ndetermined by certain anomalous interactions.",
        "category": "hep"
    },
    {
        "text": "Photon-photon scattering from a UV-complete gravity QFT: Quantum quadratic gravity (QQG) produces a tree-level differential cross\nsection for $\\gamma\\gamma\\to\\gamma\\gamma$ that is well-behaved at all energies.\nFrom this we can study how the corrections to low energy scattering amplitudes\nare related to the UV physics, in particular to the exchange of the massive\ngraviparticles. An effective forward scattering amplitude is obtained by\nseparating out the effects of the $t$-channel graviton pole. This is possible\ndue to the UV-completeness, and even though the Froissart bound is not\nsatisfied. We then consider photon-photon scattering to two graviparticles and\na further imaginary contribution to the $\\gamma\\gamma\\to\\gamma\\gamma$ forward\nscattering amplitude. Unitarity without positivity is a key property of QQG and\nit impacts all our results.",
        "category": "hep"
    },
    {
        "text": "Unique Identification of Lee-Wick Gauge Bosons at Linear Colliders: Grinstein, O'Connell and Wise have recently presented an extension of the\nStandard Model (SM), based on the ideas of Lee and Wick (LW), which\ndemonstrates an interesting way to remove the quadratically divergent\ncontributions to the Higgs mass induced by radiative corrections. This model\npredicts the existence of negative-norm copies of the usual SM fields at the\nTeV scale with ghost-like propagators and negative decay widths, but with\notherwise SM-like couplings. In earlier work, it was demonstrated that the LW\nstates in the gauge boson sector of these models, though easy to observe,\ncannot be uniquely identified as such at the LHC. In this paper, we address the\nissue of whether or not this problem can be resolved at an $e^+e^-$ collider\nwith a suitable center of mass energy range. We find that measurements of the\ncross section and the left-right polarization asymmetry associated with Bhabha\nscattering can lead to a unique identification of the neutral electroweak gauge\nbosons of the Lee-Wick type.",
        "category": "hep"
    },
    {
        "text": "Reparametrization Invariance and Partial Re-Summations of the Heavy\n  Quark Expansion: We extend existing work on reparametrization invariance (RPI) of the\nheavy-quark expansion. We discuss the total rates of inclusive processes and\nobtain results which have a manifest RPI and can be expressed through matrix\nelements of operators and states defined in full QCD. This approach leads to a\npartial re-summation of higher-order terms in the heavy-quark expansion and has\nthe advantage that the number of independent parameters is reduced.",
        "category": "hep"
    },
    {
        "text": "The Consistent Result of Cosmological Constant From Quantum Cosmology\n  and Inflation with Born-Infeld Scalar Field: The Quantum cosmology with Born-Infeld(B-I) type scalar field is considered.\nIn the extreme limits of small cosmological scale factor the wave function of\nthe universe can also be obtained by applying the methods developed by\nHartle-Hawking(H-H) and Vilenkin. H-H wave function predicts that most Probable\ncosmological constant $\\Lambda$ equals to $\\frac{1}{\\eta}$($\\frac{1}{2\\eta}$\nequals to the maximum of the kinetic energy of scalar field). It is different\nfrom the original results($\\Lambda=0$) in cosmological constant obtained by\nHartle-Hawking. The Vilenkin wave function predicts a nucleating unverse with\nlargest possible cosmological constant and it is larger than $1/\\eta$. The\nconclusions have been nicely to reconcile with cosmic inflation. We investigate\nthe inflation model with B-I type scalar field, and find that $\\eta$ depends on\nthe amplitude of tensor perturbation $\\delta_h$, with the form\n$\\frac{1}{\\eta}\\simeq \\frac{m^2}{12\\pi[(\\frac{9\\delta_{\\Phi}^2}{N\n\\delta_h^2})^2-1]}.$ The vacuum energy in inflation epoch depends on the\ntensor-to-scalar ratio $\\frac{\\delta_h}{\\delta_{\\Phi}}$. The amplitude of the\ntensor perturbation ${\\delta_{h}}$ can, in principle, be large enough to be\ndiscovered. However, it is only on the border of detectability in future\nexperiments. If it has been observed in future, this is very interesting to\ndetermine the vacuum energy in inflation epoch.",
        "category": "hep"
    },
    {
        "text": "Symmetry transformations in Batalin-Vilkovisky formalism: This short note is closely related to Sen-Zwiebach paper on gauge\ntransformations in Batalin-Vilkovisky theory (hep-th 9309027). We formulate\nsome conditions of physical equivalence of solutions to the quantum master\nequation and use these conditions to give a very transparent analysis of\nsymmetry transformations in BV-approach. We prove that in some sense every\nquantum observable (i.e. every even function $H$ obeying\n$\\Delta_{\\rho}(He^S)=0$) determines a symmetry of the theory with the action\nfunctional $S$ satisfying quantum master equation $\\Delta_{\\rho}e^S=0$ \\end",
        "category": "hep"
    },
    {
        "text": "Symmetry Nonrestoration in a Gross-Neveu Model with Random Chemical\n  Potential: We study the symmetry behavior of the Gross-Neveu model in three and two\ndimensions with random chemical potential. This is equivalent to a four-fermion\nmodel with charge conjugation symmetry as well as Z_2 chiral symmetry. At high\ntemperature the Z_2 chiral symmetry is always restored. In three dimensions the\ninitially broken charge conjugation symmetry is not restored at high\ntemperature, irrespective of the value of the disorder strength. In two\ndimensions and at zero temperature the charge conjugation symmetry undergoes a\nquantum phase transition from a symmetric state (for weak disorder) to a broken\nstate (for strong disorder) as the disorder strength is varied. For any given\nvalue of disorder strength, the high-temperature behavior of the charge\nconjugation symmetry is the same as its zero-temperature behavior. Therefore,\nin two dimensions and for strong disorder strength the charge conjugation\nsymmetry is not restored at high temperature.",
        "category": "hep"
    },
    {
        "text": "TASI lectures on quantum matter (with a view toward holographic duality): These are notes from my lectures at TASI 2015. The goal is to provide context\nfor the study of strongly-correlated quantum many-body systems using quantum\nfield theory, and possibly string theory.",
        "category": "hep"
    },
    {
        "text": "pi-pi Scattering in Twisted Mass Chiral Perturbation Theory: In this report we describe both I=2 and I=0 pi-pi scattering for twisted mass\nlattice QCD utilizing twisted mass chiral perturbation theory at\nnext-to-leading order. Focusing on the lattice spacing (b) corrections, we\ndemonstrate that in the exotic I=2, I_3=+-2 channels, the leading scaling\nviolations of pi-pi scattering at maximal twist begin at O(m_pi^2 b^2). This is\nnot the case in any other isospin channel, for which the scaling violations at\nmaximal twist begin at O(b^2). Furthermore, we demonstrate the existence of a\nmixing between the I=2, I_3 = 0 and I=0 scattering channels due to the breaking\nof isospin symmetry by the twisted mass term. The mixing term, although\nformally next-to-leading order, is relatively large, thus necessitating the use\nof a coupled channel analysis. We argue that this mixing likely renders the\ncomputation of the I=0 channel impractical with twisted mass lattice QCD.",
        "category": "hep"
    },
    {
        "text": "Constraints on the geometry of branes from massive gauge invariant\n  vector KK modes: We investigate the gauge invariance of massive vector Kaluza-Klein (KK) modes\nin different brane models with two extra dimensions. We demonstrate that some\nadditional constraint conditions on the geometry of branes are needed in order\nto get the gauge invariant effective action of the KK modes. Nevertheless, not\nall the conditions can be satisfied by the solutions of the branes, which will\nbreak the gauge invariance. Moreover, in the branes where the conditions can\nmeet the brane solutions, we calculate mass spectra of vector and scalar KK\nmodes, and the results show that when only one kind of scalar KK modes is found\nto be massive, the gauge invariance will also be broken.",
        "category": "hep"
    },
    {
        "text": "Patterns of gauge symmetry in the background field method: The correlation functions of Yang-Mills theories formulated in the background\nfield method satisfy linear Slavnov-Taylor identities, which are naive\ngeneralizations of simple tree level relations, with no deformations\noriginating from the ghost sector of the theory. In recent years, a stronger\nversion of these identities has been found to hold at the level of the\nbackground gluon self-energy, whose transversality is enforced separately for\neach special block of diagrams contributing to the gluon Schwinger-Dyson\nequation. In the present work we demonstrate by means of explicit calculations\nthat the same distinct realization of the Slavnov-Taylor identity persists in\nthe case of the background three-gluon vertex. The analysis is carried out at\nthe level of the exact Schwinger-Dyson equation for this vertex, with no\ntruncations or simplifying assumptions. The demonstration entails the\ncontraction of individual vertex diagrams by the relevant momentum, which\nactivates Slavnov-Taylor identities of vertices and multi-particle kernels\nnested inside these graphs; the final result emerges by virtue of a multitude\nof extensive cancellations, without the need of performing explicit\nintegrations. In addition, we point out that background Ward identities amount\nto replacing derivatives of propagators by zero-momentum background-gluon\ninsertions, in exact analogy to standard properties of Abelian gauge theories.\nFinally, certain potential applications of these results are briefly discussed.",
        "category": "hep"
    },
    {
        "text": "On Hpp-wave/CFT_2 Holography: We briefly review the AdS3/CFT2 correspondence and the holographic issues\nthat arise in the Penrose limit. Exploiting current algebra techniques,\ndevelopped by D'Appollonio and Kiritsis for the closely related Nappi-Witten\nmodel, we obtain preliminary results for bosonic string amplitudes in the\nresulting Hpp-wave background and comment on how to extend them to the\nsuperstring.",
        "category": "hep"
    },
    {
        "text": "Nonrelativistic Cousin of QCD: Based on the uniqueness and universality of gravity, it is clear that\ntheories with different dynamical exponents are related in the holographic\napproach. Concretely, we construct an M-theory background from pure QCD dual\nand show that a deformed $Sch_{6}^{4}$ geometry is obtained by compactification\nfrom the same background. The deformed $Sch_{6}^{4}$ geometry is considered as\nthe geometrical realization of a four-dimensional nonrelativistic field theory.\nSeveral aspects of this nonrelativistic field theory are studied in the\nholographic picture.",
        "category": "hep"
    },
    {
        "text": "Symmetries, Spin-2 Scattering Amplitudes, and Equivalence theorems in\n  Warped Five-Dimensional Gravitational Theories: Building on work by Hang and He, we show how the residual five-dimensional\ndiffeomorphism symmetries of compactified gravitational theories with a warped\nextra dimension imply Equivalence theorems which ensure that the scattering\namplitudes of helicity-0 and helicity-1 spin-2 Kaluza-Klein states equal (to\nleading order in scattering energy) those of the corresponding Goldstone bosons\npresent in the `t-Hooft-Feynman gauge. We derive a set of Ward identities that\nlead to a transparent power-counting of the scattering amplitudes involving\nspin-2 Kaluza-Klein states. We explicitly calculate these amplitudes in terms\nof the Goldstone bosons in the Randall-Sundrum model, check the correspondence\nto previous unitary-gauge computations, and demonstrate the efficacy of\n`t-Hooft-Feynman gauge for accurately computing amplitudes for scattering of\nthe spin-2 states both among themselves and with matter. Power-counting for the\nGoldstone boson interactions establishes that the scattering amplitudes grow no\nfaster than $O(s)$, explaining the origin of the behavior previously shown to\narise from intricate cancellations between different contributions to these\nscattering amplitudes in unitary gauge. We describe how our results apply to\nmore general warped geometries, including models with a stabilized extra\ndimension. In an appendix we explicitly identify the symmetry algebra of the\nresidual 5D diffeomorphisms of a Randall-Sundrum extra-dimensional theory.",
        "category": "hep"
    },
    {
        "text": "The Nucleon Electric Dipole Moment in Light-Front QCD: I present an exact relationship between the electric dipole moment and\nanomalous magnetic moment of the nucleon in the light-front formalism of QCD\nand consider its consequences.",
        "category": "hep"
    },
    {
        "text": "Supersymmetric Proton Decay Revisited: Encouraged by the advent of a new generation of underground detectors---JUNO,\nDUNE and Hyper-Kamiokande---that are projected to improve significantly on the\npresent sensitivities to various baryon decay modes, we revisit baryon decay in\nthe minimal supersymmetric SU(5) GUT. We discuss the phenomenological\nuncertainties associated with hadronic matrix elements and the value of the\nstrong coupling $\\alpha_s$---which are the most important---the weak mixing\nangle $\\theta_W$, quark masses including one-loop renormalization effects,\nquark mixing and novel GUT phases that are not visible in electroweak\ninteraction processes. We apply our analysis to a variety of CMSSM, super- and\nsub-GUT scenarios in which soft supersymmetry-breaking parameters are assumed\nto be universal at, above and below the GUT scale, respectively. In many cases,\nwe find that the next generation of underground detectors should be able to\nprobe models with sparticle masses that are ${\\cal O}(10)$~TeV, beyond the\nreach of the LHC.",
        "category": "hep"
    },
    {
        "text": "A closed clockwork theory: $\\mathbb{Z}_2$ parity and more: We develop a new class of clockwork theories with an augmented structure of\nthe near-neighbour interactions along a one-dimensional closed chain. Such a\ntopology leads to new and attractive features in addition to generating light\nstates with hierarchical couplings via the usual clockwork mechanism. For one,\nthere emerges a $\\mathbb{Z}_2$ symmetry under the exchange of fields resulting\nin a physical spectrum consisting of states, respectively even and odd under\nthe exchange parity with a two-fold degeneracy at each level. The lightest odd\nparticle, being absolutely stable, could be envisaged as a potential dark\nmatter candidate. The theory can also be obtained as a deconstruction of a\nfive-dimensional theory embedded in a geometry generated by a linear dilaton\ntheory on a $S^1/\\mathbb{Z}_2$ orbifold with three equidistant 3-branes.\nAnalogous to the discrete picture, the $\\mathbb{Z}_2$ symmetry in the bulk\ntheory necessitates the existence of a KK spectrum of even and odd states, with\ndoubly degenerate modes at each KK level when subject to certain boundary\nconditions.",
        "category": "hep"
    },
    {
        "text": "High precision study of K+- --> 3pi+- decays by NA48/2: Preliminary results of study of $K^\\pm\\to3\\pi^\\pm$ decays by the NA48/2\nexperiment at CERN SPS are presented. They include a precise measurement of the\ndirect CP violating charge asymmetry of Dalitz plot linear slope parameters\n$A_g=(g^+-g^-)/(g^++g^-)$, and a measurement of the Dalitz plot slope\nparameters $(g,h,k)$ themselves. Due to the design of the experiment, and a\nlarge data set collected, unprecedented precisions were achieved.",
        "category": "hep"
    },
    {
        "text": "Dark energy from approximate U(1)_{de} symmetry: The PLANCK observation strengthens the argument that the observed\nacceleration of the Universe is dominated by the invisible component of dark\nenergy. We address how this extremely small DE density can be obtained in an\nultraviolet completed theory. From two mass scales, the grand unification scale\nM_G and the Higgs boson mass, we parametrize this dark energy(DE). To naturally\ngenerate an extremely small DE term, we introduce an almost flat DE potential\nof a pseudo-Goldstone boson of an approximate global symmetry U(1)_{de} from\nsome discrete symmetries allowed in an ultraviolet completed theory. For the DE\npotential to be extremely shallow, the pseudo-Goldstone boson is required not\nto couple to the QCD anomaly. This fixes uniquely the nonrenormalizable term\ngenerating the potential suppressed by M_G^7 in supergravity models.",
        "category": "hep"
    },
    {
        "text": "SUSY Long-Lived Massive Particles: Detection and Physics at the LHC: We draw a possible scenario for the observation of massive long-lived charged\nparticles at the LHC detector ATLAS. The required flexibility of the detector\ntriggers and of the identification and reconstruction systems are discussed. As\nan example, we focus on the measurement of the mass and lifetime of long-lived\ncharged sleptons predicted in the framework of supersymmetric models with\ngauge-mediated supersymmetry (SUSY) breaking. In this case, the\nnext-to-lightest SUSY particle can be the light scalar partner of the tau\nlepton, possibly decaying slowly into a gravitino. A wide region of the SUSY\nparameters space was explored. The accessible range and precision on the\nmeasurement of the SUSY breaking scale parameter sqrt(F) achievable with a\ncounting method are assessed.",
        "category": "hep"
    },
    {
        "text": "Finite Width in out-of-Equilibrium Propagators and Kinetic Theory: We derive solutions to the Schwinger-Dyson equations on the Closed-Time-Path\nfor a scalar field in the limit where backreaction is neglected. In Wigner\nspace, the two-point Wightman functions have the curious property that the\nequilibrium component has a finite width, while the out-of equilibrium\ncomponent has zero width. This feature is confirmed in a numerical simulation\nfor scalar field theory with quartic interactions. When substituting these\nsolutions into the collision term, we observe that an expansion including terms\nof all orders in gradients leads to an effective finite-width. Besides, we\nobserve no breakdown of perturbation theory, that is sometimes associated with\npinch singularities. The effective width is identical with the width of the\nequilibrium component. Therefore, reconciliation between the zero-width\nbehaviour and the usual notion in kinetic theory, that the out-of-equilibrium\ncontributions have a finite width as well, is achieved. This result may also be\nviewed as a generalisation of the fluctuation-dissipation relation to\nout-of-equilibrium systems with negligible backreaction.",
        "category": "hep"
    },
    {
        "text": "The N-Quantum Approximation and Bound States in Motion: We use an alternative method to the Bethe-Salpeter equation, the N-Quantum\napproximation (NQA), for studying bound states in motion. We use this method to\nfind a relativistic equation for weakly bound states of two constituents with\ndifferent masses. We present rules for interpreting simple diagrams associated\nwith the NQA. We can use these rules to construct the bound state equations\ndirectly, avoiding some of the complications of the process. The final result\nis a bound state equation that shows Lorentz contraction in the direction of\nmotion explicitly. This result matches that of [3] found using the\nBethe-Salpeter equation. We briefly discuss some other applications of the NQA\nin studying the effects of motion on bound states.",
        "category": "hep"
    },
    {
        "text": "Path Integral Quantization of Cosmological Perturbations: We derive the first order canonical formulation of cosmological perturbation\ntheory in a Universe filled by a few scalar fields. This theory is quantized\nvia well-defined Hamiltonian path integral. The propagator which describes the\nevolution of the initial (for instance, vacuum) state, is calculated.",
        "category": "hep"
    },
    {
        "text": "Entanglement entropy and nonabelian gauge symmetry: Entanglement entropy has proven to be an extremely useful concept in quantum\nfield theory. Gauge theories are of particular interest, but for these systems\nthe entanglement entropy is not clearly defined because the physical Hilbert\nspace does not factor as a tensor product according to regions of space. Here\nwe review a definition of entanglement entropy that applies to abelian and\nnonabelian lattice gauge theories. This entanglement entropy is obtained by\nembedding the physical Hilbert space into a product of Hilbert spaces\nassociated to regions with boundary. The latter Hilbert spaces include degrees\nof freedom on the entangling surface that transform like surface charges under\nthe gauge symmetry. These degrees of freedom are shown to contribute to the\nentanglement entropy, and the form of this contribution is determined by the\ngauge symmetry. We test our definition using the example of two-dimensional\nYang-Mills theory, and find that it agrees with the thermal entropy in de\nSitter space, and with the results of the Euclidean replica trick. We discuss\nthe possible implications of this result for more complicated gauge theories,\nincluding quantum gravity.",
        "category": "hep"
    },
    {
        "text": "Rigorous treatment of the $\\mathcal{S}^1 / \\mathbb{Z}_2$ orbifold model\n  with brane-Higgs couplings: We build rigorously the attractive five-dimensional model where bulk fermions\npropagate along the $ \\mathcal{S}^1 / \\mathbb{Z}_2$ orbifold and interact with\na Higgs boson localised at a fixed point of the extra dimension. The analytical\ncalculation of the fermion mass spectrum and effective Yukawa couplings is\nshown to require the introduction of either Essential Boundary Conditions (EBC)\nimposed by the model definition or certain Bilinear Brane Terms (BBT) in the\naction, instead of the usual brane-Higgs regularisations. The obtained fermion\nprofiles along the extra dimension turn out to undergo some discontinuities, in\nparticular at the Higgs brane, which can be mathematically consistent if the\naction is well written with improper integrals. We also show that the\n$\\mathbb{Z}_2$ parity transformations in the bulk do not affect the fermion\nchiralities, masses and couplings, in contrast with the EBC and BBT, but when\nextended to the fixed points, they can generate the chiral nature of the theory\nand even select the Standard Model chirality set-up while fixing as well the\nfermion masses and couplings. Thanks to the strict analysis developed, the\nduality with the interval model is scrutinised.",
        "category": "hep"
    },
    {
        "text": "From Twistor Actions to MHV Diagrams: We show that MHV diagrams are the Feynman diagrams of certain twistor actions\nfor gauge theories in an axial gauge. The gauge symmetry of the twistor action\nis larger than that on space-time and this allows us to fix a gauge that makes\nthe MHV formalism manifest but which is inaccessible from space-time. The\nframework is extended to describe matter fields: as an illustration we\nexplicitly construct twistor actions for an adjoint scalar with arbitrary\npolynomial potential and a fermion in the fundamental representation and show\nhow this leads to additional towers of MHV vertices in the MHV diagram\nformalism.",
        "category": "hep"
    },
    {
        "text": "Wigner functions of essentially nonequilibrium systems: The aim of the article is to discuss the S-matrix interpretation of\nperturbation theory for the Wigner functions generating functional at a finite\ntemperature. For sake of definiteness, fruitful from pedagogical point of view,\nthe concrete problem from particle physics of high-temperature initial states\ndissipation into cold one is considered from experimental and theoretical\npoints of view. The temperature is introduced in the theory by typical for the\nmicrocanonical description way. The perturbation theory contains two-\ntemperature (of initial and final states) Green functions. Two possible\nboundary conditions are considered. One of them is usual in a field theory\nvacuum boundary condition. Corresponding generating functional of Wigner\nfunctions can be used in the particle physics. Another type of the boundary\ncondition assumes that the system under consideration is in environment of the\nblack-body radiation. This leads to the usual in statistics\nKubo-Martin-Schwinger boundary condition at the equilibrium (one-temperature)\nlimit. The comparison of the S-matrix approach with Schwinger-Keldysh real-time\nfinite-temperature field theory and with nonstationary statistical operator\napproach of Zubarev are considered. The range of applicability of the\nfinite-temperature description of dissipation processes is shown.",
        "category": "hep"
    },
    {
        "text": "Cascading to the MSSM: The MSSM can arise as an orientifold of a pyramid-like quiver in the context\nof intersecting D-branes. Here we consider quiver realizations of the MSSM\nwhich can emerge at the bottom of a duality cascade. We classify all possible\nminimal ways this can be done by allowing only one extra node. It turns out\nthat this requires extending the geometry of the pyramid to an octahedron. The\nMSSM at the bottom of the cascade arises in one of two possible ways, with the\nextra node disappearing either via Higgsing or confinement. Remarkably, the\nquiver of the Higgsing scenario turns out to be nothing but the quiver version\nof the left-right symmetric extension of the MSSM. In the minimal confining\nscenario the duality cascade can proceed if and only if there is exactly one\nup/down Higgs pair. Moreover, the symmetries of the octahedron naturally admit\nan automorphism of the quiver which solves a version of the mu problem\nprecisely when there are an odd number of generations.",
        "category": "hep"
    },
    {
        "text": "Divergent energy strings in $AdS_5\\times S^5$ with three angular momenta: In this paper, novel solutions for strings with three angular momenta in\n$AdS_5 \\times S^5$ geometry are presented; the divergent energy limit and the\ncorresponding conserved charges, as well as dispersion relation are also\ndetermined. Interpretations of these configurations as either a giant magnon\n(GM) or a spiky string (SS) are discussed.",
        "category": "hep"
    },
    {
        "text": "Hybrid Goldstone Modes from the Double Copy Bootstrap: We perform a systematic classification of scalar field theories whose\namplitudes admit a double copy formulation and identify two building blocks at\n4-point and 13 at 5-point. Using the 4-point blocks as bootstrap seeds, this\nnaturally leads to a single copy theory that is a gauged NLSM. Moreover, its\ndouble copy includes a novel theory that can be written in terms of Lovelock\ninvariants of an induced metric, and includes Dirac-Born-Infeld and the special\nGalileon in specific limits. The amplitudes of these Goldstone modes have two\ndistinct soft behaviour regimes, corresponding to a hybrid of non-linear\nsymmetries.",
        "category": "hep"
    },
    {
        "text": "Strange nucleon form factors in the perturbative chiral quark model: We apply the perturbative chiral quark model at one loop to calculate the\nstrange form factors of the nucleon. A detailed numerical analysis of the\nstrange magnetic moments and radii of the nucleon, and also the momentum\ndependence of the form factors is presented.",
        "category": "hep"
    },
    {
        "text": "The photon polarization tensor in pulsed Hermite- and Laguerre-Gaussian\n  beams: In this article, we provide analytical expressions for the photon\npolarization tensor in pulsed Hermite- and Laguerre-Gaussian laser beams. Our\nresults are based on a locally constant field approximation of the one-loop\nHeisenberg-Euler effective Lagrangian for quantum electrodynamics. Hence, by\nconstruction they are limited to slowly varying electromagnetic fields, varying\non spatial and temporal scales significantly larger than the Compton\nwavelength/time of the electron. The latter criterion is fulfilled by all laser\nbeams currently available in the laboratory. Our findings will, e.g., be\nrelevant for the study of vacuum birefringence experienced by probe photons\nbrought into collision with a high-intensity laser pulse which can be\nrepresented as a superposition of either Hermite- or Laguerre-Gaussian modes.",
        "category": "hep"
    },
    {
        "text": "Current-driven tricritical point in large-$N_{c}$ gauge theory: We discover a new tricritical point realized only in non-equilibrium steady\nstates, using the AdS/CFT correspondence. Our system is a (3+1)-dimensional\nstrongly-coupled large-$N_{c}$ gauge theory. The tricritical point is\nassociated with a chiral symmetry breaking under the presence of an electric\ncurrent and a magnetic field. The critical exponents agree with those of the\nLandau theory of equilibrium phase transitions. This suggests that the presence\nof a Landau-like phenomenological theory behind our non-equilibrium phase\ntransitions.",
        "category": "hep"
    },
    {
        "text": "A non-perturbative exploration of the high energy regime in\n  $N_\\text{f}=3$ QCD: Using continuum extrapolated lattice data we trace a family of running\ncouplings in three-flavour QCD over a large range of scales from about 4 to 128\nGeV. The scale is set by the finite space time volume so that recursive finite\nsize techniques can be applied, and Schr\\\"odinger functional (SF) boundary\nconditions enable direct simulations in the chiral limit. Compared to earlier\nstudies we have improved on both statistical and systematic errors. Using the\nSF coupling to implicitly define a reference scale $1/L_0\\approx 4$ GeV through\n$\\bar{g}^2(L_0) =2.012$, we quote $L_0 \\Lambda^{N_{\\rm f}=3}_{\\overline{\\rm\nMS}} =0.0791(21)$. This error is dominated by statistics; in particular, the\nremnant perturbative uncertainty is negligible and very well controlled, by\nconnecting to infinite renormalization scale from different scales $2^n/L_0$\nfor $n=0,1,\\ldots,5$. An intermediate step in this connection may involve any\nmember of a one-parameter family of SF couplings. This provides an excellent\nopportunity for tests of perturbation theory some of which have been published\nin a letter [1]. The results indicate that for our target precision of 3 per\ncent in $L_0 \\Lambda^{N_{\\rm f}=3}_{\\overline{\\rm MS}}$, a reliable estimate of\nthe truncation error requires non-perturbative data for a sufficiently large\nrange of values of $\\alpha_s=\\bar{g}^2/(4\\pi)$. In the present work we reach\nthis precision by studying scales that vary by a factor $2^5= 32$, reaching\ndown to $\\alpha_s\\approx 0.1$. We here provide the details of our analysis and\nan extended discussion.",
        "category": "hep"
    },
    {
        "text": "Extraction of the Ratio of the Neutron to Proton Structure Functions\n  from Deep Inelastic Scattering: We study the nuclear ($A$) dependence of the European Muon Collaboration\n(EMC) effect at high values of $x$ ($x \\geq 0.6$). Our approach makes use of\nconventional nuclear degrees of freedom within the Relativistic Impulse\nApproximation. By performing a non-relativistic series expansion we demonstrate\nthat relativistic corrections make a substantial contribution to the effect at\n$x \\gtrsim 0.6$ and show that the ratio of neutron to proton structure\nfunctions extracted from a global fit to all nuclei is not inconsistent with\nvalues obtained from the deuteron.",
        "category": "hep"
    },
    {
        "text": "Difficulties in a Kind of Averaging Procedure for Constructing\n  Gauge-invariant Operators out of Gauge-variant Ones: We prove that a kind of averaging procedure for constructing gauge-invariant\noperators(or functionals) out of gauge-variant ones is erroneous and\ninapplicable for a large class of operators(or functionals).",
        "category": "hep"
    },
    {
        "text": "Kazhdan-Lusztig equivalence and fusion of Kac modules in Virasoro\n  logarithmic models: The subject of our study is the Kazhdan-Lusztig (KL) equivalence in the\ncontext of a one-parameter family of logarithmic CFTs based on Virasoro\nsymmetry with the (1,p) central charge. All finite-dimensional indecomposable\nmodules of the KL-dual quantum group - the \"full\" Lusztig quantum sl(2) at the\nroot of unity - are explicitly described. These are exhausted by projective\nmodules and four series of modules that have a functorial correspondence with\nany quotient or a submodule of Feigin-Fuchs modules over the Virasoro algebra.\nOur main result includes calculation of tensor products of any pair of the\nindecomposable modules. Based on the Kazhdan-Lusztig equivalence between\nquantum groups and vertex-operator algebras, fusion rules of Kac modules over\nthe Virasoro algebra in the (1,p) LCFT models are conjectured.",
        "category": "hep"
    },
    {
        "text": "Threshold effects and radiative electroweak symmetry breaking in $SU(5)$\n  extensions of the MSSM: We make a complete analysis of radiative symmetry breaking in the MSSM and\nits $SU(5)$ extensions including low- and high-energy threshold effects in the\nframework of the two-loop renormalization group. In particular, we consider\nminimal $SU(5)$, the ``missing-doublet'' $SU(5)$, a Peccei-Quinn invariant\nversion of $SU(5)$ as well as a version with light adjoint remnants. We derive\npermitted ranges for the parameters of these models in relation to predicted\n$\\alpha_{s}$ and $M_G$ values within the present experimental accuracy. The\nparameter regions allowed under the constraints of radiative symmetry breaking,\nperturbativity and proton stability, include the experimentally designated\ndomain for $\\alpha_s$. In the case of the minimal $SU(5)$, the values of\n$\\alpha_s$ obtained are somewhat large in comparison with the experimental\naverage. The ``missing-doublet'' $SU(5)$, generally, predicts smaller values of\n$\\alpha_s$. In both versions of the ``missing-doublet'', the high energy\nthreshold effects on $\\alpha_s$ operate in the opposite direction than in the\ncase of the minimal model, leading to small values. In the case of the\nPeccei-Quinn version however the presence of an extra intermediate scale allows\nto achieve an excellent agreement with the experimental $\\alpha_s$ values.\nFinally, the last considered version, with light remnants, exhibits unification\nof couplings at string scale at the expense however of rather large $\\alpha_s$\nvalues.",
        "category": "hep"
    },
    {
        "text": "Antimatter in Different Baryogenesis Scenarios: Possible mechanisms of abundant creation of antimatter in the universe are\nreviewed. The necessary conditions for that are: baryonic charge\nnonconservation, spontaneous breaking of charge symmetry or nonequilibrium\ninitial state, and the formation of appropriate initial conditions during\ninflation. In this case the universe may be populated with domains, cells, or\neven stellar size objects consisting of antimatter.",
        "category": "hep"
    },
    {
        "text": "Neutrino oscillations in high energy cosmic neutrino flux: I discuss the effects of neutrino oscillations on high energy cosmic\nneutrinos which come from cosmologically distant astrophysical sources. I\nincorporate all the up-to-date constraints from the solar, atmospheric,\nreactor, accelerator data and give the possible pattern for the ratio of the\nhigh energy cosmic neutrinos in the cases of three and four neutrino schemes.",
        "category": "hep"
    },
    {
        "text": "Transverse densities and generalized parton distributions of $\u03c1$\n  meson in light front quark model: We have investigated the transverse charge density for longitudinal and\ntransversely polarized $\\rho$ meson in light-front quark model (LFQM). Charge\ndensities are obtained from the elastic form factors of the $\\rho$ meson\ncalculated in LFQM including the zero-mode contributions. We have computed the\ndifferent helicity matrix elements of the $\\rho$ meson. In addition to this, we\nhave also presented the results for the generalized parton distributions (GPDs)\nand impact-parameter dependent parton distribution functions (ipdpdfs) of the\n$\\rho$ meson.",
        "category": "hep"
    },
    {
        "text": "Classification of symmetric toroidal orbifolds: We provide a complete classification of six-dimensional symmetric toroidal\norbifolds which yield N>=1 supersymmetry in 4D for the heterotic string. Our\nstrategy is based on a classification of crystallographic space groups in six\ndimensions. We find in total 520 inequivalent toroidal orbifolds, 162 of them\nwith Abelian point groups such as Z_3, Z_4, Z_6-I etc. and 358 with non-Abelian\npoint groups such as S_3, D_4, A_4 etc. We also briefly explore the properties\nof some orbifolds with Abelian point groups and N=1, i.e. specify the Hodge\nnumbers and comment on the possible mechanisms (local or non-local) of gauge\nsymmetry breaking.",
        "category": "hep"
    },
    {
        "text": "Spontaneous Symmetry Breaking in Compactified $\u03bb\u03c6^4$ Theory: We consider the massive vector $N$-component $(\\lambda\\phi^{4})_{D}$ theory\nin Euclidian space and, using an extended Matsubara formalism we perform a\ncompactification on a $d$-dimensional subspace, $d\\leq D$. This allows us to\ntreat jointly the effect of temperature and spatial confinement in the\neffective potential of the model, setting forth grounds for an analysis of\nphase transitions driven by temperature and spatial boundary. For $d=2$, which\ncorresponds to the heated system confined between two parallel planes\n(separation $L$), we obtain, in the large $N$ limit at one-loop order, formulas\nfor temperature- and boundary-dependent mass and coupling constant. The\nequation for the critical curve in the $\\beta \\times L$ plane is also derived.",
        "category": "hep"
    },
    {
        "text": "Hadron energy spectrum in polarized top quark decays considering the\n  effects of hadron and bottom quark masses: We present the analytical expressions for the next-to-leading order\ncorrections to the partial decay width $t(\\uparrow) \\rightarrow bW^+$, followed\nby $b\\rightarrow H_bX$, for nonzero b-quark mass ($m_b\\neq 0$) in the\nfixed-flavor-number scheme (FFNs). To make the predictions for the energy\ndistribution of outgoing hadrons $H_b$, as a function of the normalized\n$H_b$-energy fraction $x_H$, we apply the general-mass variable-flavor-number\nscheme (GM-VFNs) in a specific helicity coordinate system where the\npolarization of top quark is evaluated relative to the b-quark momentum. We\nalso study the effects of gluon fragmentation and finite hadron mass on the\nhadron energy spectrum so that hadron masses are responsible for the low-$x_H$\nthreshold. In order to describe both the b-quark and the gluon hadronizations\nin top decays we apply realistic and nonperturbative fragmentation functions\nextracted through a global fit to $e^+e^-$ annihilation data from CERN LEP1 and\nSLAC SLC by relying on their universality and scaling violations.",
        "category": "hep"
    },
    {
        "text": "More about F-term uplifting: We study moduli stabilization and a realization of de Sitter vacua in\ngeneralized F-term uplifting scenarios of the KKLT-type anti-de Sitter vacuum,\nwhere the uplifting sector X directly couples to the light K\\\"ahler modulus T\nin the superpotential through, e.g., stringy instanton effects. F-term\nuplifting can be achieved by a spontaneous supersymmetry breaking sector, e.g.,\nthe Polonyi model, the O'Raifeartaigh model and the Intriligator-Seiberg-Shih\nmodel. Several models with the X-T mixing are examined and qualitative features\nin most models {\\it even with such mixing} are almost the same as those in the\nKKLT scenario. One of the quantitative changes, which are relevant to the\nphenomenology, is a larger hierarchy between the modulus mass m_T and the\ngravitino mass $m_{3/2}$, i.e., $m_T/m_{3/2} = {\\cal O}(a^2)$, where $a \\sim 4\n\\pi^2$. In spite of such a large mass, the modulus F-term is suppressed not\nlike $F^T = {\\cal O}(m_{3/2}/a^2)$, but like $F^T = {\\cal O}(m_{3/2}/a)$ for\n$\\ln (M_{Pl}/m_{3/2}) \\sim a$, because of an enhancement factor coming from the\nX-T mixing. Then we typically find a mirage-mediation pattern of gaugino masses\nof ${\\cal O}(m_{3/2}/a)$, while the scalar masses would be generically of\n${\\cal O}(m_{3/2})$.",
        "category": "hep"
    },
    {
        "text": "Quarkonium Production At $Z^0$ and in $\u03a5(1S)$ Decay: The conventional color-singlet model was challenged by the recent data on\nquarkonium production. Discrepancies in production rates were observed at the\nTevatron, at LEP, and in fixed-target experiments. The newly advocated\ncolor-octet mechanism provides a plausible solution to the anomalous quarkonium\nproduction observed at the Tevatron. The color-octet mechanism should also\naffect other quarkonium production channels. In this paper we will summarize\nthe studies of quarkonium production in $Z^0$ and $\\Upsilon$ decays.",
        "category": "hep"
    },
    {
        "text": "Leptogluons in dilepton production at LHC: In the composite models with colored substructure of the fermions the color\nsinglet leptons are accompanied by a composite color octet partners, which are\nknown as leptogluons. We consider the effect of leptogluons in the dilepton\nproduction at the LHC and show that in the reachable parameter range this\neffect is typically dominated by t-channel leptogluon exchange (indirect\nchannel). We show that this channel alone can give a sizable contribution to\nthe dimuon production at the LHC for TeV scale values of the invariant mass of\nthe muon-antimuon pairs.",
        "category": "hep"
    },
    {
        "text": "Rapidity and Energy Dependences of Temperatures and Volume Extracted\n  from Identified Charged Hadron Spectra in Proton-Proton Collisions at a Super\n  Proton Synchrotron (SPS): The standard (Bose-Einstein/Fermi-Dirac or Maxwell-Boltzmann) distribution\nfrom the relativistic ideal gas model is used to study the transverse momentum\n($p_{T}$) spectra of identified charged hadrons ($\\pi^-$, $\\pi^+$, $K^-$,\n$K^+$, $\\bar p$, and $p$) with different rapidities produced in inelastic\nproton-proton ($pp$) collisions at the Super Proton Synchrotron (SPS). The\nexperimental data measured by the NA61/SHINE Collaboration at the\ncenter-of-mass (c.m.) energies $\\sqrt{s}=6.3$, 7.7, 8.8, 12.3, and 17.3 GeV are\nfitted well by the distribution. It is shown that the effective temperature\n($T_{eff}$ or $T$), kinetic freeze-out temperature ($T_{0}$), and initial\ntemperature ($T_{i}$) decrease with the increase in rapidity and increase with\nthe increase in c.m. energy. The kinetic freeze-out volume ($V$) extracted from\nthe $\\pi^-$, $\\pi^+$, $K^-$, $K^+$, and $\\bar p$ spectra decreases with the\nrapidity and increase with the c.m. energy. The opposite tendency of $V$,\nextracted from the $p$ spectra, is observed to be increasing with the rapidity\nand decreasing with the c.m. energy due to the effect of leading protons.",
        "category": "hep"
    },
    {
        "text": "Associated Production of a KK-Graviton with a Higgs Boson via Gluon\n  Fusion at the LHC: In order to solve the hierarchy problem, several extra-dimensional models\nhave received considerable attention. We have considered a process where a\nHiggs boson is produced in association with a KK-graviton ($G_{\\rm KK}$) at the\nLHC. At the leading order, this process occurs through gluon fusion mechanism\n$gg \\to h G_{\\rm KK}$ via a quark loop. We compute the cross section and\nexamine some features of this process in the ADD model. We find that the quark\nin the loop does not decouple in the large quark-mass limit just as in the case\nof $gg\\to h$ process. We compute the cross section of this process for the case\nof the RS model also. We examine the feasibility of this process being observed\nat the LHC.",
        "category": "hep"
    },
    {
        "text": "$D_s$ Inclusive Decays: The availability of branching fractions for a large majority of $D_s$ decays\npermits the prediction of inclusive branching fractions. This is achieved with\nthe help of a modest amount of input from an isospin statistical model applied\nto non-resonant multibody $D_s$ decays. A systematic uncertainty in these\nmostly small branching ratios is estimated by comparing predictions of this\nmodel with those of a model involving quark-antiquark pair production. The\ncalculated inclusive branching fractions can be compared with data (for\nexample, from a large sample of $D_s^+ D_s^{*-} + D_s^{*+} D_s^-$ obtained by\nthe CLEO Collaboration) and examined for specific final states which can shed\nlight on strong and weak decay mechanisms.",
        "category": "hep"
    },
    {
        "text": "Cosmic-Ray Neutrinos from the Decay of Long-Lived Particle and the\n  Recent IceCube Result: Motivated by the recent IceCube result, we study high energy cosmic-ray\nneutrino flux from the decay of a long-lived particle. Because neutrinos are so\ntransparent, high energy neutrinos produced in the past may also contribute to\nthe present neutrino flux. We point out that the PeV neutrino events observed\nby IceCube may originate in the decay of a particle much heavier than PeV if\nits lifetime is shorter than the present cosmic time. It is shown that the mass\nof the particle responsible for the IceCube event can be as large as $\\sim\n10^{10}\\ {\\rm GeV}$. We also discuss several possibilities to acquire\ninformation about the lifetime of the long-lived particle.",
        "category": "hep"
    },
    {
        "text": "Measurement of the pseudoscalar mixing angle and $\u03b7^{\\prime}$\n  gluonium content with KLOE detector: We have measured the ratio $R_{\\phi}=BR(\\phi \\to \\eta^{\\prime}\n\\gamma)/BR(\\phi \\to \\eta \\gamma)$ by looking for the radiative decays $\\phi \\to\n\\eta^{\\prime} \\gamma$ and $\\phi \\to \\eta \\gamma$ in the final states\n$\\pi^+\\pi^-$ 7 $\\gamma$'s and 7 $\\gamma$'s respectively, in a sample of $\\sim\n1.3\\cdot 10^{9}$ $\\phi$ mesons produced at the Frascati $\\phi$-factory. We\nobtain $R_{\\phi}=(4.77\\pm0.09_{stat}\\pm0.19_{sys})\\cdot 10^{-3}$ from which we\nderive $BR(\\phi \\to \\eta^{\\prime}\n\\gamma)=(6.20\\pm0.11_{stat}\\pm0.25_{sys})\\cdot 10^{-5}$. In the hypothesis of\nno gluonium content we extract the pseudoscalar mixing angle in the\nquark-flavor basis $\\phi_P=(41.4\\pm0.3_{stat}\\pm0.7_{sys}\\pm0.6_{th})^{\\circ}$.\nCombining the value of $R_{\\phi}$ with other constraints, we estimate the\ngluonium fractional content of $\\eta^{\\prime}$ meson as $Z^2 = 0.14\\pm0.04$ and\nthe mixing angle $\\phi_P = (39.7\\pm0.7)^{\\circ}$.",
        "category": "hep"
    },
    {
        "text": "Effective Supergravity from the Weakly Coupled Heterotic String: The motivation for Calabi-Yau-like compactifications of the weakly coupled\n$E_8\\otimes E_8$ heterotic string theory, its particle spectrum and the issue\nof dilaton stabilization are briefly reviewed. Modular invariant models for\nhidden sector condensation and supersymmetry breaking are described at the\nquantum level of the effective field theory. Their phenomenological and\ncosmological implications, including a possible origin for R-parity, are\ndiscussed.",
        "category": "hep"
    },
    {
        "text": "Screening in Hot Non-Abelian Plasma: This thesis is devoted to the study of the screening masses in hot\nnon-Abelian theories. Section 1 contain a brief introduction to the topic. In\nsection 2 a detailed overview of the screening phenomena and their applications\nis given. In section 3 the screening masses are defined through the coupled gap\nequations. Section 4 deals with the determination of the screening masses of\nhot SU(2) gauge theory in the framework of the 3d lattice adjoint Higgs model\nconsidered as an effective theory. Finally in section 5 the screening masses of\nhot SU(2) Higgs model are examined.",
        "category": "hep"
    },
    {
        "text": "Twist operator correlator revisited and tau function on Hurwitz space: Correlation function of twist operators is a natural quantity of interest in\ntwo-dimensional conformal field theory (2d CFT) and finds relevance in various\nphysical contexts. For computing twist operator correlators associated with\ngeneric branched covers of genus zero and one, we present a generalization of\nthe conventional stress-tensor method to encompass generic 2d CFTs without\nrelying on any free field realization. This is achieved by employing a\ngeneralization of the argument of Calabrese-Cardy in the cyclic genus zero\ncase. The generalized stress-tensor method reveals a compelling relation\nbetween the twist operator correlator and the tau function on Hurwitz space,\nthe moduli space of branched covers, of Kokotov-Korotkin. This stems from the\nclose relation between stress-tensor one-point function and Bergman projective\nconnection of branched cover. The tau function on Hurwitz space is in turn\nrelated to the more general isomonodromic tau function, and this chain of\ncorrespondence thus relates the twist operator correlator to a canonical\nalgebro-geometric object and endows it with an integrable system\ninterpretation. Conversely, the tau function on Hurwitz space essentially\nadmits a CFT interpretation as the holomorphic part of the twist operator\ncorrelator of $c=1$ free boson.",
        "category": "hep"
    },
    {
        "text": "Electromagnetic form factors of the $B_c$-like tetraquarks: molecular\n  and diquark-antidiquark pictures: In this study, we use the molecular and diquark-antidiquark tetraquark\npictures to investigate magnetic and quadrupole moments of the $B_c$-like\nground state tetraquarks with the QCD light-cone sum rules with quantum numbers\n$J^P = 1^+$. In the numerical analysis, to obtain the magnetic and quadrupole\nmoments of $B_c$-like tetraquark states molecular and diquark-antidiquark forms\nof interpolating currents, and photon distribution amplitudes have been used.\nThe magnetic moments are acquired as $ \\mu_{Z_{{uc \\bar u \\bar\nb}}}^{Mol}=1.18^{+0.52}_{-0.40}~\\mu_N$, $\\mu_{Z_{{uc \\bar u \\bar\nb}}}^{Di}=3.05^{+1.19}_{-0.95}~\\mu_N$, $\\mu_{Z_{dc \\bar d \\bar\nb}}^{Mol}=0.32^{+0.18}_{-0.10}~\\mu_N$, and $\\mu_{Z_{dc \\bar d \\bar\nb}}^{Di}=2.38^{+0.95}_{-0.75}~\\mu_N$. The hadrons' magnetic and quadrupole\nmoments are another fundamental observable as their mass, which provides\ninformation on the underlying quark structure and dynamics. The results\nobtained in both pictures are quite different from each other. Any experimental\nmeasurement of the magnetic moments can provide an understanding of the\ninternal structure of these states. We get nonzero but small values for the\nquadrupole moments of $B_c$-like tetraquark states showing non-spherical charge\ndistributions. Hopefully, the examinations given in this study will be helpful\nto an experimental search of them, which will be an interesting research\nsubject.",
        "category": "hep"
    },
    {
        "text": "Recent Developments in the PQCD Approach: We review recent developments in the perturbative QCD approach to exclusive\nhadronic B meson decays. We discuss the important next-to-leading-order\ncorrections to B -> pi K, pi pi, and the penguin-dominated B -> PV modes, where\nP (V) is a pseudo-scalar (vector) meson.",
        "category": "hep"
    },
    {
        "text": "Islands on codim-2 branes in Gauss-Bonnet Gravity: We study the black hole information problem on codim-2 branes in Gauss-Bonnet\ngravity. Thanks to the island surface ending on the brane, the Page curve of\neternal black holes can be recovered for all of the GB couplings within the\ncausal constraints. Our results strongly support the universality of the island\nmechanism. Similar to Einstein's gravity, the HM surface can exist only in a\nfinite time in GB gravity. Remarkably, for various parameters, the maximum\ntimes of HM surface are always larger than the Page times. As a result, the\nstrange behavior of HM surfaces does not affect the Page curves for general GB\ngravity. Finally, we establish the correlation between the Page time, GB\ncouplings, and brane tension, revealing that the Page time increases with these\nfactors.",
        "category": "hep"
    },
    {
        "text": "Late-time Evolution of a Charged Massless Scalar Field in the Spacetime\n  of a Dilaton Black Hole: We investigate the power-law tails in the evolution of a charged massless\nscalar field around a fixed background of a dilaton black hole. Using both\nanalytical and numerical methods we find the inverse power-law relaxation of\ncharged fields at future timelike infinity, future null infinity, and along the\nouter horizon of the considered black hole. We invisage that a charged hair\ndecays slower than neutral ones. The oscillatory inverse power law along the\nouter horizon of the dilaton black hole is of a great importance for a mass\ninflation scenario along the Cauchy horizon of a dynamically formed dilaton\nblack hole.",
        "category": "hep"
    },
    {
        "text": "Precise strength of th piNN coupling constant: We report here a preliminary value for the piNN coupling constant deduced\nfrom the GMO sumrule for forward piN scattering. As in our previous\ndetermination from np backward differential scattering cross sections we give a\ncritical discussion of the analysis with careful attention not only to the\nstatistical, but also to the systematic uncertainties. Our preliminary\nevaluation gives $g^2_c$(GMO) = 13.99(24).",
        "category": "hep"
    },
    {
        "text": "Exactly Solvable Floquet Dynamics for Conformal Field Theories in\n  Dimensions Greater than Two: We find classes of driven conformal field theories (CFT) in d+1 dimensions\nwith d > 1, whose quench and floquet dynamics can be computed exactly. The\nsetup is suitable for studying periodic drives, consisting of square pulse\nprotocols for which Hamiltonian evolution takes place with different\ndeformations of the original CFT Hamiltonian in successive time intervals.\nThese deformations are realized by specific combinations of conformal\ngenerators with a deformation parameter $\\beta$; the $\\beta < 1$ ($\\beta > 1$)\nHamiltonians can be unitarily related to the standard (L\\\"uscher-Mack) CFT\nHamiltonians. The resulting time evolution can be then calculated by performing\nappropriate conformal transformations. For d <= 3 we show that the\ntransformations can be easily obtained in a quaternion formalism; we use this\nformalism to obtain exact expressions for the fidelity, unequal-time\ncorrelator, and the energy density for the driven system for d = 3. Our results\nfor a single square pulse drive cycle reveal qualitatively different behaviors\ndepending on the value of $\\beta$, with exponential decays characteristic of\nheating for $\\beta > 1$, oscillations for $\\beta < 1$ and power law decays for\n$\\beta = 1$. When the Hamiltonians in one cycle involve generators of a single\nSL(2, R) subalgebra we find fixed points or fixed surfaces of the corresponding\ntransformations. Successive cycles lead to either convergence to one of the\nfixed points, or oscillations, depending on the conjugacy class. This indicates\nthat the system can be in different dynamical phases as we vary the parameters\nof the drive protocol. We also point out that our results are expected to hold\nfor a broader class of QFTs that possesses an SL(2,C) symmetry with fields that\ntransform as quasi-primaries under this. As an example, we briefly comment on\ncelestial CFTs in this context.",
        "category": "hep"
    },
    {
        "text": "Chargino Production and Decay in Photon-Photon-Collisions: We study the production and leptonic decay of charginos in collisions of\npolarized photon beams including the complete spin correlations. The photons\ncan be generated by Compton backscattering of polarized laser pulses off a\npolarized electron beam. Since the production process is determined alone by\nthe electromagnetic coupling of the charginos this process allows to study\ntheir decay dynamics. The cross section and the forward-backward asymmetry of\nthe decay lepton are very sensitive to the gaugino mass parameter $M_1$ and to\nthe sneutrino mass without any ambiguities.",
        "category": "hep"
    },
    {
        "text": "Introduction to GPDs and TMDs: Generalised parton distributions (GPDs) and transverse momentum dependent\nparton distributions (TMDs) describe complementary aspects of the\nthree-dimensional structure of hadrons. We discuss their relation to each other\nand recall important theory results concerning their properties and their\nconnection with physical observables.",
        "category": "hep"
    },
    {
        "text": "A Modern Introduction to Quarkonium Theory: Recent advances in lattice and continuum QCD have given us new insights into\nquarkonium physics. These set of lectures are intend for the uninitiated. We\nfirst give a physical picture of quarkonium and describe the hybrids states\nestablished in lattice QCD. Then we give an unorthodox presentation of\nNon-Relativistic QCD (NRQCD) including a novel method for the application of\nspin-symmetries. Finally we describe the prototypical application of NRQCD:\ncancellation of infrared divergences in decays of P-wave quarkonia.",
        "category": "hep"
    },
    {
        "text": "The Dressing Method as Non Linear Superposition in Sigma Models: We apply the dressing method on the Non Linear Sigma Model (NLSM), which\ndescribes the propagation of strings on $\\mathbb{R}\\times \\mathrm{S}^2$, for an\narbitrary seed. We obtain a formal solution of the corresponding auxiliary\nsystem, which is expressed in terms of the solutions of the NLSM that have the\nsame Pohlmeyer counterpart as the seed. Accordingly, we show that the dressing\nmethod can be applied without solving any differential equations. In this\ncontext a superposition principle emerges: The dressed solution is expressed as\na non-linear superposition of the seed with solutions of the NLSM with the same\nPohlmeyer counterpart as the seed.",
        "category": "hep"
    },
    {
        "text": "Evolution of flat universe with a cosmological term in modified\n  Relativistic Theory of Gravitation as a scalar-tensor extension of General\n  Relativity: We consider the dynamics of tensor and scalar gravitational fields in the\nRelativistic Theory of Gravitation with the Minkowskian vacuum metric and\ngeneralize the formulation to the massless graviton. The potential of scalar\nfield is determined in the presence of cosmological term under clear physical\nmotivations. We find cosmological inflationary solutions and analyze conditions\nproviding the transition to the regime of hot expanding universe.",
        "category": "hep"
    },
    {
        "text": "The electro-magnetic Form Factors of the Proton in Chiral Soliton Models: The electro-magnetic form factors of the proton are calculated in a chiral\nsoliton model with relativistic corrections. The magnetic form factor $G_M$ is\nshown to agree well with the new SLAC data for spacelike $Q^2$ up to 30\n(GeV/c)$^2$ if superconvergence is imposed. The direct continuation through a\nLaurent series to the timelike region above the physical threshold is in fair\nagreement with the presently available set of data. The electric form factor\n$G_E$ is dominated by a zero in the few (GeV/c)$^2$ region which appears to be\nin conflict with the SLAC data.",
        "category": "hep"
    },
    {
        "text": "Probing the photon polarization in $B \\to K^*\u03b3$ with conversion: We re-examine the possibility to measure the photon polarization in $B \\to\nK^*\\gamma$ decays, via decays in which the photon subsequently undergoes\nnuclear conversion to a lepton pair. We obtain compact expressions for the full\ndecay-plus-conversion amplitude. With these results we show that interference\nbetween the $B \\to (K^*\\to K\\pi)\\gamma$ decay and the $\\gamma N \\to\n\\ell^+\\ell^-N$ conversion permits both the ratio and relative weak phase\nbetween the left- and right-handed photon amplitudes to be probed by an angular\nobservable, constructed from the final state dilepton, kaon and pion kinematic\nconfiguration. Exploiting this technique will be experimentally challenging.\nHowever, we present special kinematic cuts that enhance the statistical power\nof this technique by an $\\mathcal{O}(1)$ factor. We verify this effect and\nextract pertinent angular kinematic distributions with dedicated numerical\nsimulations.",
        "category": "hep"
    },
    {
        "text": "The diffraction cone shrinkage speed up with the collision energy: The multiperipheral ladder structure of the Pomeron leads to the quite\nnatural conclusion that the elastic slope Bel is not simple linear function of\nthe colliding particles energy logarithm. The existing experimental data on the\ndiffraction cone shrinkage points to such \"complicated\" dependence indeed. The\nshrinkage diffraction cone speed up with the beam energy is directly connected\nwith an extreme rise of total cross-section (Froissart limit).",
        "category": "hep"
    },
    {
        "text": "Scale Evolution of Unintegrated Distributions and the p_t Spectrum of\n  Gauge Bosons: We present predictions for the $Z$-boson $p_t$-spectrum at Tevatron within\nthe framework of unintegrated distributions evolved according to evolution\nequations recently proposed by us. We discuss the dependence of the results on\nthe choice of non-perturbative parameters, the coupling constant and the impact\nof soft gluon resummation.",
        "category": "hep"
    },
    {
        "text": "Quantum dilaton gravity as a linear dilaton conformal field theory: A model of matter-coupled gravity in two dimensions is quantized. The crucial\nrequirement for performing the quantization is the vanishing of the conformal\nanomaly, which is achieved by tuning a parameter in the interaction potential.\nThe spectrum of the theory is determined by mapping the model first onto a\nfield theory with a Liouville interaction, then onto a linear dilaton conformal\nfield theory. In absence of matter fields a pure gauge theory with massless\nground state is found; otherwise it is possible to minimally couple up to 11\nmatter scalar fields: in this case the ground state is tachyonic and the matter\nsector decouples, like the transverse oscillators in the critical bosonic\nstring.",
        "category": "hep"
    },
    {
        "text": "Thermofield Dynamics for Twisted Poincare-Invariant Field Theories: Wick\n  Theorem and S-matrix: Poincare invariant quantum field theories can be formulated on\nnon-commutative planes if the statistics of fields is twisted. This is\nequivalent to state that the coproduct on the Poincare group is suitably\ntwisted. In the present work we present a twisted Poincare invariant quantum\nfield theory at finite temperature. For that we use the formalism of\nThermofield Dynamics (TFD). This TFD formalism is extend to incorporate\ninteracting fields. This is a non trivial step, since the separation in\npositive and negative frequency terms is no longer valid in TFD. In particular,\nwe prove the validity of Wick's theorem for twisted scalar quantum field at\nfinite temperature.",
        "category": "hep"
    },
    {
        "text": "Searches for new physics with leptons and jets at CMS: A variety of models of physics beyond the standard model predict new\nparticles that decay to leptons, jets, or both together. These models include\naxigluons, colorons, diquarks, excited quarks, heavy long-lived charged\nparticles, leptoquarks, Randall-Sundrum gravitons, string resonances, and new\nvector bosons (right-handed W and Z'). Using the data collected in 2011 and\n2012 at center-of-mass energies of 7 and 8 TeV, the CMS collaboration has\nperformed searches for these new particles in channels with leptons and jets.\nThe results of these searches will be presented. No evidence of new physics has\nbeen observed, and these results set new limits on the parameters of these\nmodels.",
        "category": "hep"
    },
    {
        "text": "Abelian Gauge Invariance of the WZ-type Coupling in ABJM Theory: We construct the interaction terms between the worldvolume fields of multiple\nM2-branes and 3-form gauge field of 11-dimensional supergravity, in the context\nof ABJM theory. The obtained Wess-Zumino-type coupling is simultaneously\ninvariant under the U$_{\\textrm{L}}(N)\\times$U$_{\\textrm{R}}(N)$ non-Abelian\ngauge transformation of the ABJM theory and the Abelian gauge transformation of\nthe 3-form field in 11-dimensional supergravity.",
        "category": "hep"
    },
    {
        "text": "Collective Coordinate Quantization: Relativistic and Gauge Symmetric\n  Aspects: The introduction and quantization of a center-of-mass coordinate is\ndemonstrated for the one-soliton sector of nonlinear field theories in (1+1)\ndimensions. The present approach strongly emphazises the gauge and\nBRST-symmetry aspects of collective coordinate quantization. A gauge is\npresented which is independent of any approximation scheme and which allows to\ninterpret the new degree of freedom as the {\\em quantized} center of mass\ncoordinate of a soliton. Lorentz invariance is used from the beginning to\nintroduce fluctuations of the collective coordinate in the {\\em rest frame} of\nthe {\\em moving} soliton. It turns out that due to the extended nature of the\nsoliton retardation effects lead to differences in the quantum mechanics of the\nsoliton as compared to a point-like particle. Finally, the results of the\nsemiclassical expansion are used to analyse effective soliton-meson vertices\nand the coupling to an external source. Such a coupling in general causes\nacceleration as well as internal excitation of the soliton.",
        "category": "hep"
    },
    {
        "text": "Model independent constraints on leptoquarks from MU and TAU lepton rare\n  processes: We perform a model independent analysis so as to constrain the leptoquark\n(LQ) models from negative searches for $\\mu \\to e \\gamma$, $\\mu \\to 3e$ decays\n(and analogous processes in the $\\tau$ sector), and coherent $\\mu-e$ conversion\nin nuclei. We considerably improve some constraints obtained by analyses known\nin the literature, analyses which we show have by far underestimated the LQ\ncontributions to the $\\mu\\to 3e$. In particular we find that the coherent\n$\\mu-e$ conversion in nuclei mediated by the photon--conversion mechanism and\nthe $\\mu \\to 3e$ decay are golden plates where the flavor changing leptoquark\ncouplings, involving the second and third quark generations, can be strongly\nconstrained. This is due to the fact that these processes get the enhancements\nby large $\\log(m_q^2/m^2_{LQ})$ terms which are induced by the so-called\n``photon-penguin'' diagrams. These enhancements, which produce a mild GIM\nsuppression in the amplitudes, have not been taken into account in the previous\nanalyses. We show that the $\\mu \\to e \\gamma$ decay can set weaker constraints\non the LQ models and this is because its amplitude is strongly GIM suppressed\nby the terms of order $O(m_q^2/m^2_{LQ})$. We also present the results for the\ncorresponding constraints in the $\\tau$ sector. Finally the prospects of the\nfuture muon experiments for the improvement of the present bounds are analyzed\nand discussed.",
        "category": "hep"
    },
    {
        "text": "Vacua of N=10 three dimensional gauged supergravity: We study scalar potentials and the corresponding vacua of N=10 three\ndimensional gauged supergravity. The theory contains 32 scalar fields\nparametrizing the exceptional coset space $\\frac{E_{6(-14)}}{SO(10)\\times\nU(1)}$. The admissible gauge groups considered in this work involve both\ncompact and non-compact gauge groups which are maximal subgroups of\n$SO(10)\\times U(1)$ and $E_{6(-14)}$, respectively. These gauge groups are\ngiven by $SO(p)\\times SO(10-p)\\times U(1)$ for $p=6,...10$, $SO(5)\\times\nSO(5)$, $SU(4,2)\\times SU(2)$, $G_{2(-14)}\\times SU(2,1)$ and $F_{4(-20)}$. We\nfind many AdS$_3$ critical points with various unbroken gauge symmetries. The\nrelevant background isometries associated to the maximally supersymmetric\ncritical points at which all scalars vanish are also given. These correspond to\nthe superconformal symmetries of the dual conformal field theories in two\ndimensions.",
        "category": "hep"
    },
    {
        "text": "Inflation in Models with Large Extra Dimensions Driven by a Bulk Scalar\n  Field: We discuss inflation in models with large extra dimensions, driven by a bulk\nscalar field. The brane inflaton is then a single effective field, obtained\nfrom the bulk scalar field by scaling. The self interaction terms of the\neffective brane inflaton are then naturally suppressed. The picture is\nconsistent with a fundamental string scale in the TeV range without the problem\nof a superlight inflaton. If hybrid inflation is considered, the right\nprediction for the density perturbations as observed by COBE can be obtained\nwithout any fine tunning. The bulk inflaton then decays preferentially into\nbrane Higgses and reheating follows.",
        "category": "hep"
    },
    {
        "text": "Exploring Non-Holomorphic Soft Terms in the Framework of Gauge Mediated\n  Supersymmetry Breaking: It is known that in the absence of a gauge singlet field, a specific class of\nsupersymmetry (SUSY) breaking non-holomorphic (NH) terms can be soft breaking\nin nature so that they may be considered along with the Minimal Supersymmetric\nStandard Model (MSSM) and beyond. There have been studies related to these\nterms in minimal supergravity based models. Consideration of an F-type SUSY\nbreaking scenario in the hidden sector with two chiral superfields however\nshowed Planck scale suppression of such terms. In an unbiased point of view for\nthe sources of SUSY breaking, the NH terms in a phenomenological MSSM (pMSSM)\ntype of analysis showed a possibility of a large SUSY contribution to muon\n$g-2$, a reasonable amount of corrections to the Higgs boson mass and a drastic\nreduction of the electroweak fine-tuning for a higgsino dominated\n$\\widetilde{\\chi}^0_1$ in some regions of parameter space. We first investigate\nhere the effects of the NH terms in a low scale SUSY breaking scenario. In our\nanalysis with minimal gauge mediated supersymmetry breaking (mGMSB) we probe\nhow far the results can be compared with the previous pMSSM plus NH terms based\nstudy. We particularly analyze the Higgs, stop and the electroweakino sectors\nfocusing on a higgsino dominated $\\widetilde{\\chi}^0_1$ and\n$\\widetilde{\\chi}^{\\pm}_1$, a feature typically different from what appears in\nmGMSB. The effect of a limited degree of RG evolutions and vanishing of the\ntrilinear coupling terms at the messenger scale can be overcome by choosing a\nnon-minimal GMSB scenario, such as one with a matter-messenger interaction.",
        "category": "hep"
    },
    {
        "text": "Deviation from tri-bimaximal mixings in two types of inverted\n  hierarchical neutrino mass models: An attempt is made to explore the possibility for deviations of solar mixing\nangle ($\\theta_{12}$) from tri-bimaximal mixings, without sacrificing the\npredictions of maximal atmospheric mixing angle ($\\theta_{23}=\\pi/4$) and zero\nreactor angle ($\\theta_{13}=0$). We find that the above conjecture can be\nautomatically realised in the inverted hierarchical neutrino mass model having\n2-3 symmetry, in the basis where charged lepton mass matrix is diagonal. For\nthe observed ranges of $\\bigtriangleup m^2_{21}$ and $\\bigtriangleup m^2_{23]$,\nwe calculate the predictions on $\\tan^2\\theta_{12}=0.5, 0.45, 0.35$ for\ndifferent input values of the parameters in the neutrino mass matrix. We also\nobserve a possible crossing over from one type of inverted hierarchical model\nhaving same CP parity (Type-IHA) to other type having opposite CP parity\n(Type-IHB). Such neutrino mass matrices can be obtained from the canonical\nseesaw formula using diagonal form of Dirac neutrino mass matrix and\nnon-diagonal texture of right-handed Majorana mass matrix, and may have\nimportant implications in model building using discrete as well as non-abelian\nsymmetry groups.",
        "category": "hep"
    },
    {
        "text": "Heavy Quark Photoproduction in Ultra-peripheral Heavy Ion Collisions: Heavy quarks are copiously produced in ultra-peripheral heavy ion collisions.\nIn the strong electromagnetic fields, c c-bar and b b-bar are produced by\nphotonuclear and two-photon interactions; hadroproduction can occur in grazing\ninteractions. We present the total cross sections, quark transverse momentum\nand rapidity distributions, as well as the Q Q-bar invariant mass spectra from\nthe three production channels. We consider AA and pA collisions at the\nRelativistic Heavy Ion Collider and Large Hadron Collider. We discuss\ntechniques for separating the three processes and describe how the AA to pA\nproduction ratios might be measured accurately enough to study nuclear\nshadowing.",
        "category": "hep"
    },
    {
        "text": "Polarizations of two vector mesons in B decays: Inspired by the small longitudinal polarizations (LPs) of $B\\to K^* \\phi$\ndecays observed by BELLE and BABAR, we revise the theoretical uncertainties of\nperturbative QCD approach for determining hard scales of B decays, we find that\nthe LPs of $B\\to K^* \\phi$ could approach to 60% while the branching ratios\n(BRs) could be around $9\\times 10^{-6}$. In addition, we also study the BRs and\npolarization fractions of $B\\to \\rho (\\omega) \\rho (\\omega)$ and $B\\to \\rho\n(\\omega) K^*$ decays. For those tree dominant and color-allowed processes in\n$B\\to \\rho (\\omega) \\rho (\\omega)$ decays, we get that the BRs of $(\\rho^{+}\n\\rho^{-}, \\rho^{0} \\rho^{+}, \\omega \\rho^{+})$ are $(23.06, 11.99, 14.78)\\times\n10^{-6}$ while their LPs are close to unity. Interestingly, due to significant\ntree contributions, we find that the BR(LP) of $\\rho^{-} K^{*+}$ could be\naround $10.13 \\times 10^{-6}(60%)$; and due to the tree and electroweak\npenguin, the BR(LP) of $\\omega K^{*+}$ could be around $5.67 \\times\n10^{-6}(61%)$.",
        "category": "hep"
    },
    {
        "text": "$\\mathcal{O}(a)$ improved quark mass renormalization for a\n  non-perturbative matching of HQET to three-flavor QCD: The use of Heavy Quark Effective Theory (HQET) on the lattice as an approach\nto B-physics phenomenology is based on a non-perturbative matching of HQET to\nQCD in finite volume. As a first step to apply the underlying strategy in the\nthree-flavor ($N_f = 2+1$) theory, we determine the renormalization constant\nand improvement coefficients relating the renormalized current and subtracted\nquark mass of (quenched) valence quarks in $\\mathcal{O}(a)$ improved $N_f=3$\nlattice QCD. We present our strategy and first results for the relevant\nparameter region towards weak couplings along a line of constant physics, which\ncorresponds to lattice resolutions $a\\leq 0.02\\,$fm and fixes the physical\nextent of the matching volume to $L\\approx 0.5\\,$fm.",
        "category": "hep"
    },
    {
        "text": "The onset of classical QCD dynamics in relativistic heavy ion collisions: The experimental results on hadron production obtained recently at RHIC offer\na new prospective on the energy dependence of the nuclear collision dynamics.\nIn particular, it is possible that parton saturation -- the phenomenon likely\nproviding initial conditions for the multi--particle production at RHIC\nenergies -- may have started to set in central heavy ion collisions already\naround the highest SPS energy. We examine this scenario, and make predictions\nbased on high density QCD for the forthcoming 22 GeV run at RHIC.",
        "category": "hep"
    },
    {
        "text": "Conformal group of transformations of the quantum field operators in the\n  momentum space and the five dimensional Lagrangian approach: Conformal group of transformations in the momentum space, consisting of\ntranslations $p'_{\\mu}=p_{\\mu}+h_{\\mu}$, rotations\n$p'_{\\mu}=\\Lambda^{\\nu}_{\\mu}p_{\\nu}$, dilatation $p'_{\\mu}=\\lambda p_{\\mu}$\nand inversion $p'_{\\mu}= -M^2p_{\\mu}/p^2$ of the four-momentum $p_{\\mu}$, is\nused for the five dimensional generalization of the equations of motion for the\ninteracting massive particles. It is shown, that the ${\\cal S}$-matrix of the\ncharged and the neutral particles scattering is invariant under translations in\na four-dimensional momentum space $p'_{\\mu}=p_{\\mu}+h_{\\mu}$. In the suggested\nsystem of equations of motion, the one-dimensional equations over the fifth\ncoordinate $x_5$ are separated and these one dimensional equations have the\nform of the evaluation equations with $x_5=\\sqrt{x_o^2-{\\bf x}^2}$. The\nimportant property of the derived five dimensional equations of motion is the\nexplicit separation of the parts of these equations according to the inversion\n$p'_{\\mu}=-M^2 p_{\\mu}/p^{2}$, where $M$ is a scale constant.",
        "category": "hep"
    },
    {
        "text": "Top-quark decay into Upsilon-meson: The calculation of the partial width of the rare t-quark decay into\nUpsilon-meson, W-boson and b-quark (t -> \\Upsilon W b) is presented. The\nbranching ratio equals Br(t -> Upsilon W b) = 1.3 * 10^{-5} that make possible\nsearches for this rare $t$-quark decay at LHC.",
        "category": "hep"
    },
    {
        "text": "Minimal Massive Gravity: Conserved Charges, Excitations and the Chiral\n  Gravity Limit: We find the excitations and construct the conserved charges ( mass and\nangular momentum) of the recently found Minimal Massive Gravity (MMG) in 2+1\ndimensions in asymptotically Anti-de Sitter (AdS) spacetimes. The field\nequation of the theory does not come from an action and hence lacks the\nrequired Bianchi Identity needed to define conserved charges. But the theory,\nwhich also provides a healthy extension of the Topologically Massive Gravity in\nthe bulk and boundary of spacetime, does admit conserved charges for metric\nthat are solutions. Our construction is based on background Killing vectors and\nimperative to provide physical meaning to the integration constants in the\nblack hole type metrics. We also study the chiral gravity limit of MMG.",
        "category": "hep"
    },
    {
        "text": "Fermionic zero modes in the vortex field in arbitrary dimensions and\n  index of Dirac operator with Majorana-like interaction: In this work we consider fermionic zero modes in the external scalar and\nelectromagnetic field forming the vortex on a sphere. We find the\ncorrespondence between the equations for the fermions in different dimensions,\nfind their explicit expressions through the vortex fields in case of massless\nfermions, asymptotics near the poles in case of massive fermions and check the\nnumber of the solutions by proving index theorem for the fermions on a sphere.\nAs a part of deriving the index, we write a detailed calculation of the Green\nfunction of the Heat equation.",
        "category": "hep"
    },
    {
        "text": "An algebraic model to study the internal structure of pseudo-scalar\n  mesons with heavy-light quark content: The internal structure of all lowest-lying pseudo-scalar mesons with\nheavy-light quark content is studied in detail using an algebraic model that\nhas been applied recently, and successfully, to the same physical observables\nof pseudo-scalar and vector mesons with hidden-flavor quark content, from light\nto heavy quark sectors. The algebraic model consists on constructing simple and\nevidence-based \\emph{ans\\\"atze} of the meson's Bethe-Salpeter amplitude (BSA)\nand quark's propagator in such a way that the Bethe-Salpeter wave function\n(BSWF) can then be readily computed algebraically. Its subsequent projection\nonto the light front yields the light front wave function (LFWF) whose form\nallows us a simple access to the valence-quark Parton Distribution Amplitude\n(PDA) by integrating over the transverse momentum squared. We exploit our\ncurrent knowledge of the PDAs of lowest-lying pseudo-scalar heavy-light mesons\nto compute their Generalized Parton Distributions (GPDs) through the overlap\nrepresentation of LFWFs. From these three dimensional knowledge, different\nlimits/projections lead us to deduce the related Parton Distribution functions\n(PDFs), Electromagnetic Form Factors (EFFs), and Impact parameter space GPDs\n(IPS-GPDs). When possible, we make explicit comparisons with available\nexperimental results and earlier theoretical predictions.",
        "category": "hep"
    },
    {
        "text": "Testing lepton flavor universality in terms of data of BES III and\n  charm-tau factory: The recent measurements on $R_K$ and $R_{\\pi}$ imply that there exists a\npossible violation of the leptonic flavor universality which is one of the\ncornerstones of the standard model. It is suggested that a mixing between\nsterile and active neutrinos might induce such a violation. In this work we\nconsider the scenarios with one or two sterile neutrinos to explicitly realize\nthe data while the constraints from the available experiments have been taken\ninto account. Moreover, as indicated in literature, the deviation of the real\nPMNS matrix from the symmetric patterns may be due to a $\\mu-\\tau$ asymmetry,\ntherefore the measurements on $R_{D(D_s)e\\mu} = \\Gamma(D(D_s)\\rightarrow\ne^+\\nu_e)/\\Gamma(D(D_s)\\rightarrow \\mu^+\\nu_\\mu)$ and $R_{D(D_s)\\mu\\tau} =\n\\Gamma(D(D_s)\\rightarrow \\mu^+\\nu_\\mu)/\\Gamma(D(D_s)\\rightarrow\n\\mu^+\\tau_\\tau)$ (and for some other heavy mesons $B^{\\pm}$ and $B_c$ etc.) may\nshed more light on physics responsible for the violation of the leptonic flavor\nuniversality. The data of BES III are available to test the universality and\nthat of the future charm-tau factory will provide more accurate information\ntowards the aspect, in this work, we will discuss $R_{D(D_s)e\\mu}$ and\n$R_{D(D_s)\\mu\\tau}$ in all details and also briefly consider the cases for\n$B^{\\pm}$ and $B_c$.",
        "category": "hep"
    },
    {
        "text": "Bottomonia correlators and spectral functions at zero and finite\n  temperature: We present preliminary studies of bottomonia spectral functions at zero and\nfinite temperature using quenched anisotropic lattices. The heavy quark is\ntreated within Fermilab approach. We find no modification of the $\\eta_b$ and\n$\\Upsilon$ states up to temperatures $2.3T_c$ while our study suggest\ndissolution of $\\chi_b$ state at $1.15T_c$.",
        "category": "hep"
    },
    {
        "text": "Hubbard Model with L\u00fcscher fermions: We study the basic features of the two-dimensional quantum Hubbard Model at\nhalf-filling by means of the L\\\"uscher algorithm and the algorithm based on\ndirect update of the determinant of the fermionic matrix. We implement the\nL\\\"uscher idea employing the transfer matrix formalism which allows to\nformulate the problem on the lattice in $(2+1)$ dimensions. We discuss the\nnumerical complexity of the L\\\"uscher technique, systematic errors introduced\nby polynomial approximation and introduce some improvements which reduce long\nautocorrelations. In particular we show that preconditioning of the fermionic\nmatrix speeds up the algorithm and extends the available range of parameters.\nWe investigate the magnetic and the one-particle properties of the Hubbard\nModel at half-filling and show that they are in qualitative agreement with the\nexisting Monte Carlo data and the mean-field predictions.",
        "category": "hep"
    },
    {
        "text": "Tension of Confining Strings at Low Temperature: In the low temperature confining phase of QCD or QCD-like theories it is\nchallenging to capture the temperature dependence of observables through\nAdS/CFT. Using the blackfold approach we compute the quark-antiquark linear\nstatic potential in the low temperature confining phase, taking into account\nthe thermal excitations of the string. We find the explicit temperature\ndependence of the string tension and notice that, as naturally expected,\ntension decreases as temperature increases. We have also generalized the\nblackfold approach for the computation of the Wilson loops, making it directly\napplicable to a large class of backgrounds.",
        "category": "hep"
    },
    {
        "text": "M(atrix) Theory on T9/Z2 Orbifold and Twisted Zero Brane: M(atrix) theory compactified on an orbifold ${\\bf T}_9/{\\bf Z}_2$ is studied.\nVia zero-brane parton scattering we find that each of the $2^9 = 512$ orbifold\nfixed points carry $-1/32$ units of zero-brane charge. The anomalous flux is\ncancelled by introducing a twisted sector consisting of 32 zero-branes that are\nspacetime supersymmetry singlets. These twisted sector zero-branes are nothing\nbut gravitational waves propagating along the M-theory direction. There is no\nD0-partons in the untwisted sector, a fact consistent with holographic\nprinciple. For low-energy excitations, the orbifold compactification is\ndescribed by ten-dimensional supersymmetric Yang-Mills theory with gauge group\n$SO(32)$.",
        "category": "hep"
    },
    {
        "text": "Measurement of B Decays to phi K gamma: We search for the decays B- -> phi K- gamma and B0bar -> phi K0bar gamma in a\ndata sample of 228 million BBbar pairs collected at the Upsilon(4S) resonance\nwith the BaBar detector. We measure the branching fraction B(B- -> phi K-\ngamma) = (3.5 +/- 0.6 +/- 0.4) x 10^-6 and set an upper limit B(B0bar -> phi\nK0bar gamma) < 2.7 x 10^-6 at the 90% confidence level. We also measure the\ndirect CP asymmetry in B- -> phi K- gamma, A_CP = (-26 +/- 14 +/- 5)%. The\nuncertainties are statistical and systematic, respectively.",
        "category": "hep"
    },
    {
        "text": "First implementation of transverse spherocity analysis for heavy-ion\n  collisions at the Large Hadron Collider energies: Transverse spherocity, an event shape observable, has a very unique\ncapability to separate the events based on their geometrical shape, i.e. jetty\nand isotropic. In this work, we use transverse spherocity for the first time in\nheavy-ion collisions using A Multi-Phase Transport Model (AMPT). We obtain the\ntransverse momentum spectra, integrated yield, mean transverse momentum and\nazimuthal anisotropy for identified particles in Xe-Xe collisions at\n$\\sqrt{s_{\\rm{NN}}} = 5.44$ TeV and Pb-Pb collisions at $\\sqrt{s_{\\rm{NN}}} =\n5.02$ TeV. The indication of collectivity in heavy-ion collisions can be\nclearly seen while comparing the transverse momentum spectra from jetty and\nisotropic events. The elliptic flow as a function of transverse spherocity\nshows that the isotropic events have nearly zero elliptic flow and the elliptic\nflow is mostly dominated by the jetty events. This study will pave a way to\nfocus on jetty events in heavy-ion collisions in order to investigate jet\nmedium modification and jet hadro-chemistry in a sophisticated manner.",
        "category": "hep"
    },
    {
        "text": "Infrared structures of scattering on self-dual radiative backgrounds: The scattering of gluons and gravitons in trivial backgrounds is endowed with\nmany surprising infrared features which have interesting conformal\ninterpretations on the two-dimensional celestial sphere. However, the fate of\nthese structures in more general asymptotically flat backgrounds is far from\nclear. In this paper, we consider holomorphic infrared structures in the\npresence of non-perturbative, self-dual background gauge and gravitational\nfields which are determined by freely specified radiative data. We make use of\nexplicit formulae for tree-level gluon and graviton scattering in these\nself-dual radiative backgrounds, as well as chiral twistor sigma model\ndescriptions of the classical dynamics. Remarkably, we find that the leading\nholomorphic part of tree-level collinear splitting functions -- or celestial\nOPEs -- and infinite-dimensional chiral soft algebras are undeformed by the\nbackground. We also compute all-order holomorphic celestial OPEs in the MHV\nsectors of gauge theory and gravity.",
        "category": "hep"
    },
    {
        "text": "Dispersion-theoretical analysis of the electromagnetic form factors of\n  the $\u039b$ hyperon: The electromagnetic form factors of the $\\Lambda$ hyperon in the time-like\nregion are determined precisely through a dispersion-theoretical analysis of\nthe world data for the cross section of the annihilation process $e^+e^-\\to\n\\bar{\\Lambda}{\\Lambda}$. The spectral function is represented by a\nsuperposition of narrow and broad vector meson poles. We test different\nscenarios for the spectral function and obtain a good description of the world\ndata in the time-like region. The uncertainties in the extracted form factors\nare estimated by means of the bootstrap sampling method. The analytical\ncontinuation of the form factors to the space-like region introduces large\nerrors due to the lack of data. When the electric $\\Lambda$ radius from chiral\nperturbation theory is taken as a constraint, the magnetic radius is predicted\nas $r_M = 0.681 \\pm 0.002$ fm. We also extract various vector meson to baryon\ncoupling constants.",
        "category": "hep"
    },
    {
        "text": "(Quasi-) de Sitter solutions across dimensions and the TCC bound: In this work, we investigate the existence of string theory solutions with a\n$d$-dimensional (quasi-) de Sitter spacetime, for $3 \\leq d \\leq 10$.\nConsidering classical compactifications, we derive no-go theorems valid for\ngeneral $d$. We use them to exclude (quasi-) de Sitter solutions for $d \\geq\n7$. In addition, such solutions are found unlikely to exist in $d=6,5$. For\neach no-go theorem, we further compute the $d$-dependent parameter $c$ of the\nswampland de Sitter conjecture, $M_p \\frac{|\\nabla V|}{V} \\geq c$. Remarkably,\nthe TCC bound $c \\geq \\frac{2}{\\sqrt{(d-1)(d-2)}}$ is then perfectly satisfied\nfor $d \\geq 4$, with several saturation cases. However, we observe a violation\nof this bound in $d=3$. We finally comment on related proposals in the\nliterature, on the swampland distance conjecture and its decay rate, and on the\nso-called accelerated expansion bound.",
        "category": "hep"
    },
    {
        "text": "Matching the circular Wilson loop with dual open string solution at\n  1-loop in strong coupling: We compute the 1-loop correction to the effective action for the string\nsolution in AdS_5 x S^5 dual to the circular Wilson loop. More generically, the\nmethod we use can be applied whenever the two dimensional spectral problem\nfactorizes, to regularize and define the fluctuation determinants in terms of\nsolutions of one-dimensional differential equations. A such it can be applied\nto non-homogeneous solutions both for open and closed strings and to various\nboundary conditions. In the case of the circular Wilson loop, we obtain, for\nthe 1-loop partition function a result which up to a factor of two matches the\nexpectation from the exact gauge theory computation. The discrepancy can be\nattributed to an overall constant in the string partition function coming from\nthe normalization of zero modes, which we have not fixed.",
        "category": "hep"
    },
    {
        "text": "The spin structure of the Lambda hyperon in quenched lattice QCD: It has been suggested to use the production of Lambda hyperons for\ninvestigating the nucleon spin structure. The viability of this idea depends\ncrucially on the spin structure of the Lambda. Using nonperturbatively O(a)\nimproved Wilson fermions in the quenched approximation we have studied matrix\nelements of two-quark operators in the Lambda. We present results for the axial\nvector current, which give us the contributions of the u, d, and s quarks to\nthe Lambda spin.",
        "category": "hep"
    },
    {
        "text": "Searching for New Physics via CP Violation in B -> pi pi: We show how B -> pi pi decays can be used to search for new physics in the b\n-> d flavour-changing neutral current. One needs one piece of theoretical\ninput, which we take to be a prediction for P/T, the ratio of the penguin and\ntree amplitudes in Bd -> pi+ pi-. If present, new physics can be detected over\nmost of the parameter space. If \\alpha (\\phi_2) can be obtained independently,\nmeasurements of B+ -> pi+ pi0 and Bd/Bd(bar) -> pi0 pi0 are not even needed.",
        "category": "hep"
    },
    {
        "text": "Spin Polarisation of $t\\bar{t}\u03b3\u03b3$ production at NLO+PS with\n  GoSam interfaced to MadGraph5_aMC@NLO: We present an interface between the multipurpose NLO Monte Carlo tool\nMadGraph5_aMC@NLO and the automated one-loop amplitude generator GoSam. As a\nfirst application of this novel framework, we compute the NLO corrections to\n$pp \\to t\\bar{t}H$ and $pp \\to t\\bar{t}\\gamma\\gamma$ matched to a parton\nshower. In the phenomenological analyses of these processes, we focus our\nattention on observables which are sensitive to the polarisation of the top\nquarks.",
        "category": "hep"
    },
    {
        "text": "On the physical meaning of the Unruh effect: We present simple arguments that detectors moving with constant acceleration\n(even acceleration for a finite time) should detect particles. The effect is\nseen to be universal. Moreover, detectors undergoing linear acceleration and\nuniform, circular motion both detect particles for the same physical reason. We\nshow that if one uses a circularly orbiting electron in a constant external\nmagnetic field as the Unruh--DeWitt detector, then the Unruh effect physically\ncoincides with the experimentally verified Sokolov--Ternov effect.",
        "category": "hep"
    },
    {
        "text": "Entanglement negativity in Galilean conformal field theories: We obtain the entanglement negativity for various bipartite zero and finite\ntemperature pure and mixed state configurations in a class of\n$(1+1)$-dimensional Galilean conformal field theories. In this context we\nestablish a construction for computing the entanglement negativity for such\nbipartite states involving a suitable replica technique. Our construction\nexactly reproduces certain universal features observed for entanglement\nnegativity of corresponding states in relativistic $(1+1)$-dimensional\nconformal field theories.",
        "category": "hep"
    },
    {
        "text": "Determining alpha_s from the hyperfine splitting mUpsilon(1S)-mEta(b): The measurement of the eta_b mass, together with a QCD result for the\nhyperfine splitting E_{HFS}=M_{Upsilon(1S)}-M_{eta_b}, allows us to determine\nthe strong coupling constant alpha_s at a low energy scale. The result\nalpha_s(M_{Upsilon(1S)})=0.197\\pm 0.002_{Delta E_{HFS}^{exp}} \\pm\n0.002_{scheme} \\pm 0.002_{delta <G^2>} \\pm 0.006_{delta m_b} \\pm 0.005_{ho},\nalpha_s(M_{Z^0})=0.124\\pm 0.001_{Delta E_{HFS}^{exp}} \\pm 0.001_{scheme} \\pm\n0.001_{delta <G^2>} \\pm 0.003_{delta m_b} \\pm 0.002_{ho}, is compatible with\nthe current world average of alpha_s reported by the Particle Data Group, and\nshows that the experimental lowest-lying \\bar b b hyperfine splitting can be\nreproduced in terms of a perturbative and nonperturbative QCD contribution.",
        "category": "hep"
    },
    {
        "text": "The critical points of lattice QCD with a non--zero quark density: We study the interplay of quark number density and chiral symmetry in lattice\nQCD. We suggest that both are controlled by the eigenvalue spectrum of the\nfermionic propagator matrix, which shapes the pattern of zeros of the partition\nfunction. The onset of the quark current would be triggered by the lowest lying\neigenvalue, the chiral transition by the density of zeros, the two critical\npoints being distinct in full QCD, and coincident in the quenched\napproximation. Our preliminary estimate for the critical point in full QCD in\nthe infinite couling limit compares favourably with the predictions of the\nstrong coupling expansions and of numerical simulations based on exact,\nalternative representations of the partition function. Several reasons of\nperplexity however remain, which are briefly discussed.",
        "category": "hep"
    },
    {
        "text": "Null bootstrap for non-Hermitian Hamiltonians: A stable physical system has an energy spectrum that is bounded from below.\nFor quantum systems, the dangerous states of unboundedly low energies should\ndecouple and become null. We propose the principle of nullness and apply it to\nthe bootstrap study of Hermitian and non-Hermitian anharmonic oscillators.",
        "category": "hep"
    },
    {
        "text": "Expanding running coupling effects in the hard Pomeron: We study QCD hard processes at scales of order k^2 > Lambda^2 in the limit in\nwhich the beta-function coefficient - b is taken to be small, but alphas(k) is\nkept fixed. The (nonperturbative) Pomeron is exponentially suppressed in this\nlimit, making it possible to define purely perturbative high-energy Green's\nfunctions. The hard Pomeron exponent acquires diffusion and running coupling\ncorrections which can be expanded in the b parameter and turn out to be\ndependent on the effective coupling b alphas^2 Y. We provide a general setup\nfor this b-expansion and we calculate the first few terms both analytically and\nnumerically.",
        "category": "hep"
    },
    {
        "text": "Hadroproduction of Charm and Beauty: Recent results on the hadroproduction of charm and beauty are discussed in\nthe context of the current theoretical and experimental status. The areas\ncovered include production of open charm and beauty particles and charm and\nbeauty quarkonia. Experimental results from both fixed target and colliding\nbeam experiments are presented and compared to theoretical predictions.\nPredictions based on QCD perturbation theory are generally successful in\nexplaining the shapes of differential cross sections but underestimate the\nscale of the cross section by factors of 2-3. An exception is production of the\nvector meson quarkonia which cannot be satisfactorily explained by perturbative\nprocesses alone.",
        "category": "hep"
    },
    {
        "text": "Gauge/gravity dual dynamics for the strongly coupled sector of composite\n  Higgs models: A holographic model of chiral symmetry breaking is used to study the dynamics\nplus the meson and baryon spectrum of the underlying strong dynamics in\ncomposite Higgs models. The model is inspired by top-down D-brane\nconstructions. We introduce this model by applying it to $N_f=2$ QCD. We\ncompute meson masses, decay constants and the nucleon mass. The spectrum is\nimproved by including higher dimensional operators to reflect the UV physics of\nQCD. Moving to composite Higgs models, we impose perturbative running for the\nanomalous dimension of the quark condensate in a variety of theories with\nvarying number of colors and flavours. We compare our results in detail to\nlattice simulations for the following theories: $SU(2)$ gauge theory with two\nDirac fundamentals; $Sp(4)$ gauge theory with fundamental and sextet matter;\nand $SU(4)$ gauge theory with fundamental and sextet quarks. In each case, the\nholographic results are encouraging since they are close to lattice results for\nmasses and decay constants. Moreover, our models allow us to compute additional\nobservables not yet computed on the lattice, to relax the quenched\napproximation and move to the precise fermion content of more realistic\ncomposite Higgs models not possible on the lattice. We also provide a new\nholographic description of the top partners including their masses and\nstructure functions. With the addition of higher dimension operators, we show\nthe top Yukawa coupling can be made of order one, to generate the observed top\nmass. Finally, we predict the spectrum for the full set of models with top\npartners proposed by Ferretti and Karateev.",
        "category": "hep"
    },
    {
        "text": "Framed M-branes, corners, and topological invariants: We uncover and highlight relations between the M-branes in M-theory and\nvarious topological invariants: the Hopf invariant over $\\mathbb{Q}$,\n$\\mathbb{Z}$ and $\\mathbb{Z}_2$, the Kervaire invariant, the $f$-invariant, and\nthe $\\nu$-invariant. This requires either a framing or a corner structure. The\ncanonical framing provides a minimum for the classical action and the change of\nframing encodes the structure of the action and possible anomalies. We\ncharacterize the flux quantization condition on the C-field and the topological\naction of the M5-brane via the Hopf invariant, and the dual of the C-field as\n(a refinement of) an element of Hopf invariant two. In the signature\nformulation, the contribution to the M-brane effective action is given by the\nMaslov index of the corner. The Kervaire invariant implies that the effective\naction of the M5-brane is quadratic. Our study leads to viewing the self-dual\nstring, which is the boundary of the M2-brane on the M5-brane worldvolume, as a\nstring theory in the sense of cobordism of manifolds with corners. We show that\nthe dynamics of the C-field and its dual are encoded in unified way in the\n4-sphere, which suggests the corresponding spectrum as the generalized\ncohomology theory describing the fields. The effective action of the corner is\ncaptured by the $f$-invariant, which is an invariant at chromatic level two.\nFinally, considering M-theory on manifolds with G_2 holonomy we show that the\ncanonical ${\\rm G}_2$ structure minimizes the topological part of the M5-brane\naction. This is done via the $\\nu$-invariant and a variant that we introduce\nrelated to the one-loop polynomial.",
        "category": "hep"
    },
    {
        "text": "Dark Matter and Torsion: Superheavy right-handed Majorana neutrinos are proposed as a promising\ncandidate for dark matter, with dynamical axial torsion as the mediating agent.",
        "category": "hep"
    },
    {
        "text": "Holographic order parameter for charge fractionalization: Nonlocal order parameters for deconfinement, such as the entanglement entropy\nand Wilson loops, depend on spatial surfaces \\Sigma. These observables are\ngiven holographically by the area of a certain bulk spatial surface \\Gamma,\nending on \\Sigma. At finite charge density it is natural to consider the\nelectric flux through the bulk surface \\Gamma, in addition to its area. We show\nthat this flux provides a refined order parameter that can distinguish\n`fractionalized' phases, with charged horizons, from what we term `cohesive'\nphases, with charged matter in the bulk. Fractionalization leads to a volume\nlaw for the flux through the surface, the flux for deconfined but cohesive\nphases is between a boundary and a volume law, while finite density confined\nphases have vanishing flux through the surface. We suggest two possible field\ntheoretical interpretations for this order parameter. The first is as\ninformation extracted from the large N reduced density matrix associated to\n\\Sigma. The second is as surface operators dual to polarized bulk `D-branes',\ncarrying an electric dipole moment.",
        "category": "hep"
    },
    {
        "text": "What can be measured asymptotically?: We consider asymptotic observables in quantum field theories in which the\nS-matrix makes sense. We argue that in addition to scattering amplitudes, a\nwhole compendium of inclusive observables exists where the time-ordering is\nrelaxed. These include expectation values of electromagnetic or gravitational\nradiation fields as well as out-of-time-order amplitudes. We explain how to\ncalculate them in two ways: by relating them to amplitudes and products of\namplitudes, and by using a generalization of the LSZ reduction formula. As an\napplication, we discuss one-loop master integrals contributing to gravitational\nradiation in the post-Minkowski expansion, emphasizing the role of classical\ncut contributions and highlighting the different infrared physics of in-in\nobservables.",
        "category": "hep"
    },
    {
        "text": "Dark matter mass from relic abundance, an extra $U(1)$ gauge boson, and\n  active-sterile neutrino mixing: In a model with an extra $U(1)$ gauge to SM gauge group, we have shown the\nallowed region of masses of extra gauge boson and the dark matter which is the\nlightest one among other right-handed Majorana fermions present in the model.\nTo obtain this region, we have used bounds coming from constraints on\nactive-sterile neutrino masses and mixing from various oscillation experiments,\nconstraint on dark matter relic density obtained by PLANCK together with the\nconstraint on the extra gauge boson mass and its gauge coupling recently\nobtained by ATLAS Collaboration at LHC. From the allowed regions, it is\npossible to get some lower bounds on the masses of the extra gauge boson and\nthe dark matter and considering those values it is possible to infer what could\nbe the spontaneous symmetry breaking scale of an extra $U(1)$ gauge symmetry.",
        "category": "hep"
    },
    {
        "text": "Are there near-threshold Coulomb-like Baryonia?: The $\\Lambda_c(2590) \\Sigma_c$ system can exchange a pion near the\nmass-shell. Owing to the opposite intrinsic parity of the $\\Lambda_c(2590)$ and\n$\\Sigma_c$, the pion is exchanged in S-wave. This gives rise to a Coulomb-like\nforce that might be able to bind the system. If one takes into account that the\npion is not exactly on the mass shell, there is a shallow S-wave state, which\nwe generically call the $Y_{cc}(5045)$ and $Y_{c\\bar c}(5045)$ for the\n$\\Lambda_c(2590) \\Sigma_c$ and $\\Lambda_c(2590) \\bar{\\Sigma}_c$ systems\nrespectively. For the baryon-antibaryon case this Coulomb-like force is\nindependent of spin: the $Y_{c\\bar c}(5045)$ baryonia will appear either in the\nspin $S=0$ or $S=1$ configurations with G-parities $G=(-1)^{L+S+1}$. For the\nbaryon-baryon case the Coulomb-like force is attractive in the spin $S=0$\nconfiguration, for which a doubly charmed molecule is expected to form near the\nthreshold. This type of spectrum might be very well realized in other molecular\nstates composed of two opposite parity hadrons with the same spin and a mass\ndifference close to that of a pseudo-Goldstone boson, of which a few examples\ninclude the $\\Lambda(1405) N$, $\\Lambda(1520) \\Sigma^*$, $\\Xi(1690) \\Sigma$,\n$D_{s0}^*(2317) D$ and $D_{s1}^*(2460) D^*$ molecules.",
        "category": "hep"
    },
    {
        "text": "Conversion of protons to positrons by a black hole: The conversion of protons to positrons at the horizon of a black hole (BH) is\nconsidered. It is shown that the process may efficiently proceed for BHs with\nmasses in the range $\\sim 10^{18}$ -- $10^{21}$ g. It is argued that the\nelectric charge of BH acquired by the proton accretion to BH could create\nelectric field near BH horizon close to the critical Schwinger one. It leads to\nefficient electron-positron pair production, when electrons are back captured\nby the BH while positrons are emitted into outer space. Annihilation of these\npositrons with electrons in the interstellar medium may at least partially\nexplain the origin of the observed 511 keV line.",
        "category": "hep"
    },
    {
        "text": "M_b and f_B from non-perturbatively renormalized HQET with Nf=2 light\n  quarks: We present an updated analysis of the non-perturbatively renormalized b-quark\nmass and B meson decay constant based on CLS lattices with two dynamical\nnon-perturbatively improved Wilson quarks. This update incorporates additional\nlight quark masses and lattice spacings in large physical volume to improve\nchiral extrapolations and to reach the continuum limit. We use Heavy Quark\nEffective Theory (HQET) including 1/m_b terms with non-perturbative\ncoefficients based on the matching of QCD and HQET developed by the ALPHA\ncollaboration during the past years.",
        "category": "hep"
    },
    {
        "text": "A Density Matrix Renormalization Group Approach to an Asymptotically\n  Free Model with Bound States: We apply the DMRG method to the 2 dimensional delta function potential which\nis a simple quantum mechanical model with asymptotic freedom and formation of\nbound states. The system block and the environment block of the DMRG contain\nthe low energy and high energy degrees of freedom, respectively. The ground\nstate energy and the lowest excited states are obtained with very high\naccuracy. We compare the DMRG method with the Similarity RG method and propose\nits generalization to field theoretical models in high energy physics.",
        "category": "hep"
    },
    {
        "text": "From Neutrino Masses to Proton Decay: Current theoretical and experimental issues are reviewed in the light of the\nrecent SuperKamiokande discovery. By using quark-lepton symmetries, derived\nfrom Grand Unification and/or string theories, we show how to determine the\nnecessary neutrino parameters. In addition, the seesaw neutrino masses set the\nscale for the proton decay operators by ``measuring'' the standard model\ncut-off. The SuperKamiokande values suggest that proton decay is likely to be\nobserved early in the XXIst Century.",
        "category": "hep"
    },
    {
        "text": "Correlation functions of just renormalizable tensorial group field\n  theory: The melonic approximation: The $D$-colored version of tensor models has been shown to admit a large\n$N$-limit expansion. The leading contributions result from so-called melonic\ngraphs which are dual to the $D$-sphere. This is a note about the\nSchwinger-Dyson equations of the tensorial $\\varphi^{4}_{5}$-model (with\npropagator $1/{\\bf p}^{2}$) and their melonic approximation. We derive the\nmaster equations for two- and four-point correlation functions and discuss\ntheir solution.",
        "category": "hep"
    },
    {
        "text": "Extra U(1) as natural source of a monochromatic gamma ray line: Extensions of the Standard Model with an extra U'(1) abelian group\ngenerically generate terms coming from loops of heavy fermions, leading to\nthree gauge boson couplings, in particular Z'Z gamma. We show that WMAP data\nconstrains the gauge coupling of the group g_D to values comparable with the\nelectro-weak ones, rather independently of the mass of Z'. Moreover, the model\npredicts a monochromatic gamma-ray line which can fit a 130 GeV signal at the\nFERMI telescope for natural values of the Chern-Simons terms and a dark matter\nmass around 144.5 GeV.",
        "category": "hep"
    },
    {
        "text": "On the $p^4$--corrections to $K \\to 3\u03c0$ decay amplitudes in nonlinear\n  and linear chiral models: The calculations of isotopic amplitudes and their results for the direct\n$CP$--violating charge asymmetry in $K^\\pm \\to 3\\pi$ decays within the\nnonlinear and linear ($\\sigma$--model) chiral Lagrangian approach are compared\nwith each other. It is shown, that the latter, taking into account intermediate\nscalar resonances, does not reproduce the $p^4$--corrections of the nonlinear\napproach introduced by Gasser and Leutwyler, being saturated mainly by vector\nresonance exchange. The resulting differences concerning the $CP$ violation\neffect are traced in some detail.",
        "category": "hep"
    },
    {
        "text": "Holographic entanglement entropy for massive flavours in dS_4: We examine the holographic entanglement entropy of spherical regions in de\nSitter space in the presence of massive flavour fields which are modelled by\nprobe D7 branes in AdS_5xS^5. We focus on the finite part of the massive\ncorrection to the entropy in the limits of small mass and large mass that are\nseparated by a phase transition between two topologically distinct brane\nembeddings. For small masses, it approaches the flat space result for small\nspheres, whereas for large spheres there is a term that goes as the log of the\nsphere radius. For large masses, we find evidence for a universal contribution\nlogarithmic in the mass. In all cases the entanglement entropy is smooth as the\nsphere radius crosses the horizon.",
        "category": "hep"
    },
    {
        "text": "Entropy of near-extremal dyonic black holes: In this note it is shown that near-extremal four dimensional dyonic black\nholes, where the dilaton is not constant, can be described by a microscopic\nmodel consisting of a one-dimensional gas of massless particles.",
        "category": "hep"
    },
    {
        "text": "The Width Difference of $B_d$ Mesons: We estimate $\\dg/\\Gamma_d$, including $1/m_b$ contributions and part of the\nnext-to-leading order QCD corrections. We find that adding the latter\ncorrections decreases the value of $\\dg/\\Gamma_d$ computed at the leading order\nby a factor of almost 2. We also show that under certain conditions an upper\nbound on the value of $\\dg/\\Gamma_d$ in the presence of new physics can be\nderived. With the high statistics and accurate time resolution of the upcoming\nLHC experiment, the measurement of $\\dg$ seems to be possible. This measurement\nwould be important for an accurate measurement of $\\sin(2\\beta)$ at the LHC. In\naddition, we point out the possibility that the measurement of the width\ndifference leads to a clear signal for new physics.",
        "category": "hep"
    },
    {
        "text": "Reconciling sterile neutrinos with big bang nucleosynthesis: We re-examine the big bang nucleosynthesis (BBN) bounds on the mixing of\nneutrinos with sterile species. These bounds depend on the assumption that the\nrelic neutrino asymmetry $L_{\\nu}$ is very small. We show that for $L_{\\nu}$\nlarge enough (greater than about $10^{-5}$) the standard BBN bounds do not\napply. We apply this result to the sterile neutrino solution to the atmospheric\nneutrino anomaly and show that for $L_{\\nu} > 7 \\times 10^{-5}$ it is\nconsistent with BBN. The BBN bounds on sterile neutrinos mixing with electron\nneutrinos can also be weakened considerably.",
        "category": "hep"
    },
    {
        "text": "The c=1 String Theory S-Matrix Revisited: We revisit the perturbative S-matrix of c=1 string theory from the worldsheet\nperspective. We clarify the origin of the leg pole factors, the non-analyticity\nof the string amplitudes, and the validity as well as limitations of earlier\ncomputations based on resonance momenta. We compute the tree level 4-point\namplitude and the genus one 2-point reflection amplitude by numerically\nintegrating Virasoro conformal blocks with DOZZ structure constants on the\nsphere and on the torus, with sufficiently generic complex Liouville momenta,\nand find agreement with known answers from the c=1 matrix model.",
        "category": "hep"
    },
    {
        "text": "A Note on Large N Thermal Free Energy in Supersymmetric Chern-Simons\n  Vector Models: We compute the exact effective action for \\cN=3 U(N)_k and \\cN=4,6\nU(N)_k\\times U(N')_{-k} Chern-Simons theories with minimal matter content in\nthe 't Hooft vector model limit under which N and k go to infinity holding N/k,\nN' fixed. We also extend this calculation to \\cN=4,6 mass deformed case. We\nshow those large N effective actions except mass-deformed \\cN=6 case precisely\nreduce to that of \\cN=2 U(N)_k Chern-Simons theory with one fundamental chiral\nfield up to overall multiple factor. By using this result we argue the thermal\nfree energy and self-duality of the \\cN=3,4,6 Chern-Simons theories including\nthe \\cN=4 mass term reduce to those of the \\cN=2 case under the limit.",
        "category": "hep"
    },
    {
        "text": "The branching fraction and effective lifetime of $B_{(s)}^{0}\n  \\rightarrow \u03bc^+ \u03bc^-$ at LHCb with Run 1 and Run 2 data: After Run 1 of the LHC, global fits to $b \\rightarrow s \\ell \\ell$\nobservables show a deviation from the Standard Model (SM) with a significance\nof $\\sim$ 4 standard devations. An example of a $b \\rightarrow s \\ell \\ell$\nprocess is the decay of a $B_{s}^0$ meson into two muons ($B_{s}^0 \\rightarrow\n\\mu^+ \\mu^-$). The latest analysis of $B_{(s)}^0 \\rightarrow \\mu^+ \\mu^-$\ndecays by LHCb with Run 1 and Run 2 data is presented. The $B_{s}^0 \\rightarrow\n\\mu^+ \\mu^-$ decay is observed for the first time by a single experiment. In\naddition, the first measurement of the $B_{s}^0 \\rightarrow \\mu^+ \\mu^-$\neffective lifetime is performed. No significant excess of $B^0 \\rightarrow\n\\mu^+ \\mu^-$ decays is observed. All results are consistent with the SM and\nconstrain New Physics in $b \\rightarrow s \\ell \\ell$ processes.",
        "category": "hep"
    },
    {
        "text": "Three symmetry breakings in strong and radiative decays of strange heavy\n  mesons: In this paper, we investigate three symmetry breaking effects in strong and\nradiative decays of strange heavy mesons. We study 1/m_Q corrections within the\nheavy quark effect theory, as well as SU(3) and SU(2) symmetry breakings\ninduced by light quark mass differences and the \\eta-\\pi mixing vertex. These\neffects are studied in a covariant model. The numerical results show that the\n1/m_Q corrections of the coupling constants are consistent with \\alpha_s\n\\Lambda_{QCD}/m_Q. The SU(3) symmetry violating effect of the strong coupling\nconstant is obviously larger than that of the magnetic coupling constant. The\nvalue of the \\eta-\\pi mixing vertex has some changes because of the renewed\ndata. As compared with the other theoretical calculations and the experimental\ndata, our radiative decay rates are much larger than those of the other\ntheoretical methods, except for \\chiPT; however, our branching ratios are close\nto the experimental data.",
        "category": "hep"
    },
    {
        "text": "Saturation of $E_T/N_{ch}$ and Freeze-Out Criteria in Heavy-Ion\n  Collisions: The pseudorapidity densities of transverse energy, the charged particle\nmultiplicity and their ratios, $E_T/N_{ch}$, are estimated at mid-rapidity, in\na statistical-thermal model based on chemical freeze-out criteria, for a wide\nrange of energies from GSI-AGS-SPS to RHIC. It has been observed that in\nnucleus-nucleus collisions, $E_T/N_{ch}$ increases rapidly with beam energy and\nremains approximately constant at about a value of 800 MeV for beam energies\nfrom SPS to RHIC. $E_T/N_{ch}$ has been observed to be almost independent of\ncentrality at all measured energies. The statistical-thermal model describes\nthe energy dependence as well as the centrality independence, qualitatively\nwell. The values of $E_T/N_{ch}$ are related to the chemical freeze-out\ncriterium, $E/N \\approx 1 GeV$ valid for primordial hadrons. We have studied\nthe variation of the average mass $(<MASS>), N_{decays}/N_{primordial},\nN_{ch}/N_{decays}$ and $E_T/N_{ch}$ with $\\sqrt{s_{NN}}$ for all freeze-out\ncriteria discussed in literature. These observables show saturation around SPS\nand higher $\\sqrt{s_{NN}}$, like the chemical freeze-out temperature\n($T_{ch}$).",
        "category": "hep"
    },
    {
        "text": "A non-chiral extension of the standard model with mirror fermions: The difficulties of defining chiral gauge theories non-perturbatively suggest\na vector-like extension of the standard model with three mirror fermion\nfamilies. Some phenomenological implications of such an extension are\ndiscussed.",
        "category": "hep"
    },
    {
        "text": "Kac-Moody Symmetry in Hosotani Model: The symmetry of the massive tower of fields in higher-dimensional Yang-Mills\ntheory compactified on a space-time of the form M_d x S^1 is clarified. The\ntransformations form a loop algebra, a class of Kac-Moody algebras. Since the\nsymmetry is spontaneously broken, vector fields \"eat\" Goldstone bosons and\nacquire masses. The field of zero-mass mode can also become massive provided\nthat the field of the internal component develops a vacuum expectation value.\nThe relation between the \"restoration\" of the symmetry in massive modes and the\ngauge transformation of the zero-mode vacuum field is discussed.",
        "category": "hep"
    },
    {
        "text": "A gauge invariant infrared stabilization of 3D Yang-Mills gauge theories: We demonstrate that the inversion method can be a very useful tool in\nproviding an infrared stabilization of 3D gauge theories, in combination with\nthe mass operator $A^2$ in the Landau gauge. The numerical results will be\nunambiguous, since the corresponding theory is ultraviolet finite in\ndimensional regularization, making a renormalization scale or scheme obsolete.\nThe proposed framework is argued to be gauge invariant, by showing that the\nnonlocal gauge invariant operator $A^2_{\\min}$, which reduces to $A^2$ in the\nLandau gauge, could be treated in 3D, in the sense that it is power counting\nrenormalizable in any gauge. As a corollary of our analysis, we are able to\nidentify a whole set of powercounting renormalizable nonlocal operators of\ndimension two.",
        "category": "hep"
    },
    {
        "text": "Soft Pomeron in Holographic QCD: We study the graviton Regge trajectory in Holographic QCD as a model for high\nenergy scattering processes dominated by soft pomeron exchange. This is done by\nconsidering spin J fields from the closed string sector that are dual to\nglueball states of even spin and parity. In particular, we construct a model\nthat governs the analytic continuation of the spin J field equation to the\nregion of real J < 2, which includes the scattering domain of negative\nMaldelstam variable t. The model leads to approximately linear Regge\ntrajectories and is compatible with the measured values of 1.08 for the\nintercept and 0.25 GeV$^{-2}$ for the slope of the soft pomeron. The intercept\nof the secondary pomeron trajectory is in the same region of the subleading\ntrajectories, made of mesons, proposed by Donnachie and Landshoff, and should\ntherefore be taken into account.",
        "category": "hep"
    },
    {
        "text": "Modular Invariant Regularization of String Determinants and the Serre\n  GAGA Principle: Since any string theory involves a path integration on the world-sheet\nmetric, their partition functions are volume forms on the moduli space of genus\ng Riemann surfaces M_g, or on its super analog. It is well known that modular\ninvariance fixes strong constraints that in some cases appear only at higher\ngenus. Here we classify all the Weyl and modular invariant partition functions\ngiven by the path integral on the world-sheet metric, together with space-time\ncoordinates, b-c and/or beta-gamma systems, that correspond to volume forms on\nM_g. This was a long standing question, advocated by Belavin and Knizhnik,\ninspired by the Serre GAGA principle and based on the properties of the Mumford\nforms. The key observation is that the Bergman reproducing kernel provides a\nWeyl and modular invariant way to remove the point dependence that appears in\nthe above string determinants, a property that should have its superanalog\nbased on the super Bergman reproducing kernel. This is strictly related to the\nproperties of the propagator associated to the space-time coordinates. Such\npartition functions Z[J] have well-defined asymptotic behavior and can be\nconsidered as a basis to represent a wide class of string theories. In\nparticular, since non-critical bosonic string partition functions Z_D are\nvolume forms on M_g, we suggest that there is a mapping, based on bosonization\nand degeneration techniques, from the Liouville sector to first order systems\nthat may identify Z_D as a subclass of the Z[J]. The appearance of b-c and\nbeta-gamma systems of any conformal weight shows that such theories are related\nto W algebras. The fact that in a large N 't Hooft-like limit 2D W_N minimal\nmodels CFTs are related to higher spin gravitational theories on AdS_3,\nsuggests that the string partition functions introduced here may lead to a\nformulation of higher spin theories in a string context.",
        "category": "hep"
    },
    {
        "text": "No Mirror Symmetry in Landau-Ginzburg Spectra!: We use a recent classification of non-degenerate quasihomogeneous polynomials\nto construct all Landau-Ginzburg (LG) potentials for N=2 superconformal field\ntheories with c=9 and calculate the corresponding Hodge numbers. Surprisingly,\nthe resulting spectra are less symmetric than the existing incomplete results.\nIt turns out that models belonging to the large class for which an explicit\nconstruction of a mirror model as an orbifold is known show remarkable mirror\nsymmetry. On the other hand, half of the remaining 15\\% of all models have no\nmirror partners. This lack of mirror symmetry may point beyond the class of\nLG-orbifolds.",
        "category": "hep"
    },
    {
        "text": "Exponential BPS graphs and D-brane counting on toric Calabi-Yau\n  threefolds: Part II: We study BPS states of 5d $\\mathcal{N}=1$ $SU(2)$ Yang-Mills theory on\n$S^1\\times \\mathbb{R}^4$. Geometric engineering relates these to enumerative\ninvariants for the local Hirzebruch surface $\\mathbb{F}_0$. We illustrate\ncomputations of Vafa-Witten invariants via exponential networks, verifying\nfiber-base symmetry of the spectrum at certain points in moduli space, and\nmatching with mirror descriptions based on quivers and exceptional collections.\nAlbeit infinite, parts of the spectrum organize in families described by simple\nalgebraic equations. Varying the radius of the M-theory circle interpolates\nsmoothly with the spectrum of 4d $\\mathcal{N}=2$ Seiberg-Witten theory,\nrecovering spectral networks in the limit.",
        "category": "hep"
    },
    {
        "text": "Search for the standard model Higgs boson decaying to a W pair in the\n  fully leptonic final state in pp collisions at sqrt(s) = 7 TeV: A search for the standard model Higgs boson decaying to W+W- in pp collisions\nat sqrt(s) = 7 TeV is reported. The data are collected at the LHC with the CMS\ndetector, and correspond to an integrated luminosity of 4.6 inverse femtobarns.\nThe W+W- candidates are selected in events with two charged leptons and large\nmissing transverse energy. No significant excess of events above the standard\nmodel background expectations is observed, and upper limits on the Higgs boson\nproduction relative to the standard model Higgs expectation are derived. The\nstandard model Higgs boson is excluded in the mass range 129-270 GeV at 95%\nconfidence level.",
        "category": "hep"
    },
    {
        "text": "New Class of Quark Mass Matrices and the Flavor Mixing Matrix: We discuss a new general class of mass matrix ansatz that respects the\nfermion mass hierarchy and calculability of the flavor mixing matrix. This is a\ngeneralization of the various specific forms of the mass matrix that is\nobtained by successive breaking of the maximal permutation symmetry. By\nconfronting the experimental data, a large class of the mass matrices are shown\nto survive, while certain specific cases are phenomenologically ruled out.",
        "category": "hep"
    },
    {
        "text": "Finite Grand Unified Theories and Inflation: A class of finite GUTs in curved spacetime is considered in connection with\nthe cosmological inflation scenario. It is confirmed that the use of the\nrunning scalar-gravitational coupling constant in these models helps realizing\na successful chaotic inflation. The analyses are made for some different sets\nof the models.",
        "category": "hep"
    },
    {
        "text": "O(2)-scaling in finite and infinite volume: The exact nature of the chiral phase transition in QCD is still under\ninvestigation. In $N_f=2$ and $N_f=(2+1)$ lattice simulations with staggered\nfermions the expected O($N$)-scaling behavior was observed. However, it is\nstill not clear whether this behavior falls into the O(2) or O(4) universality\nclass. To resolve this issue, a careful scaling and finite-size scaling\nanalysis of the lattice results is needed. We use a functional renormalization\ngroup to perform a new investigation of the finite-size scaling regions in\nO(2)- and O(4)-models. We also investigate the behavior of the critical\nfluctuations by means of the $4^{\\text{th}}$-order Binder cumulant. The\nfinite-size analysis of this quantity provides an additional way for\ndetermining the universality class of the chiral phase transition in lattice\nQCD.",
        "category": "hep"
    },
    {
        "text": "A quantum field model for tachyonic neutrinos with Lorentz symmetry\n  breaking: A quantum field model for Dirac-like tachyons respecting a frame-dependent\ninterpretation rule, and thus inherently breaking Lorentz invariance, is\ndefined. It is shown how the usual paradoxa ascribed to tachyons, instability\nand acausality, are resolved in this model, and it is argued elsewhere that\nLorentz symmetry breaking is necessary to permit perturbative renormalizability\nand causality. Elimination of negative-normed states results in only\nleft-handed particles and right-handed antiparticles, suitable for describing\nthe neutrino. In this context the neutron beta decay spectrum is calculated\nnear the end point for large, but not ultrarelativistic preferred frame speed,\nassuming a vector weak interaction vertex.",
        "category": "hep"
    },
    {
        "text": "Decay constants of the pion and its excitations on the lattice: We present a calculation using lattice QCD of the ratios of decay constants\nof the excited states of the pion, to that of the pion ground state, at three\nvalues of the pion mass between 400 and 700 MeV, using an anisotropic clover\nfermion action with three flavors of quarks. We find that the decay constant of\nthe first excitation, and more notably of the second, is suppressed with\nrespect to that of the ground-state pion, but that the suppression shows little\ndependence on the quark mass. The strong suppression of the decay constant of\nthe second excited state is consistent with its interpretation as a\npredominantly hybrid state.",
        "category": "hep"
    },
    {
        "text": "Baryonic content of the pion: The baryon form factor of charged pions arises since isospin symmetry is\nbroken with unequal up and down quark masses, $m_d>m_u$, as well as\nelectromagnetic effects. We obtain estimates for this basic property in two\nphenomenological ways: from simple constituent quark models, as well as from\nfitting the $e^+e^- \\to \\pi^+ \\pi^-$ data. All our methods yield the result\nthat the baryon mean square radius, extracted from the slope of the form\nfactor, is positive for $\\pi^+$, hence a picture where the outer region has a\nnet baryon, and the inner region a net antibaryon density, both compensating\neach other such that the total baryon number is zero. For $\\pi^-$ the effect is\nequal and opposite. We estimate the corresponding mean squared baryon radius as\n$\\langle r^2 \\rangle_B^{\\pi^{+}} = (0.03-0.04~{\\rm fm})^2$.",
        "category": "hep"
    },
    {
        "text": "Matrix models for classical groups and Toeplitz$\\pm $Hankel minors with\n  applications to Chern-Simons theory and fermionic models: We study matrix integration over the classical Lie groups $U(N),Sp(2N),O(2N)$\nand $O(2N+1)$, using symmetric function theory and the equivalent formulation\nin terms of determinants and minors of Toeplitz$\\pm$Hankel matrices. We\nestablish a number of factorizations and expansions for such integrals, also\nwith insertions of irreducible characters. As a specific example, we compute\nboth at finite and large $N$ the partition functions, Wilson loops and Hopf\nlinks of Chern-Simons theory on $S^{3}$ with the aforementioned symmetry\ngroups. The identities found for the general models translate in this context\nto relations between observables of the theory. Finally, we use character\nexpansions to evaluate averages in random matrix ensembles of Chern-Simons\ntype, describing the spectra of solvable fermionic models with matrix degrees\nof freedom.",
        "category": "hep"
    },
    {
        "text": "Phase transition and hyperscaling violation for scalar Black Branes: We investigate the thermodynamical behavior and the scaling symmetries of the\nscalar dressed black brane (BB) solutions of a recently proposed, exactly\nintegrable Einstein-scalar gravity model [1], which also arises as\ncompactification of (p-1)-branes with a smeared charge. The extremal, zero\ntemperature, solution is a scalar soliton interpolating between a conformal\ninvariant AdS vacuum in the near-horizon region and a scale covariant metric\n(generating hyperscaling violation on the boundary field theory)\nasymptotically. We show explicitly that for the boundary field theory this\nimplies the emergence of an UV length scale (related to the size of the brane),\nwhich decouples in the IR, where conformal invariance is restored. We also show\nthat at high temperatures the system undergoes a phase transition. Whereas at\nsmall temperature the Schwarzschild-AdS BB is stable, above a critical\ntemperature the scale covariant, scalar-dressed BB solution, becomes\nenergetically preferred. We calculate the critical exponent z and the\nhyperscaling violation parameter of the scalar-dressed phase. In particular we\nshow that the hyperscaling violation parameter is always negative. We also show\nthat the above features are not a peculiarity of the exact integrable model of\nRef.[1], but are a quite generic feature of Einstein-scalar and\nEinstein-Maxwell-scalar gravity models for which the squared-mass of the scalar\nfield is positive and the potential vanishes exponentially as the scalar field\ngoes to minus infinity.",
        "category": "hep"
    },
    {
        "text": "Optimizing Distillation for charmonium and glueballs: We study the charmonium spectrum on an ensemble with two heavy dynamical\nquarks with a mass at half the physical charm quark mass. Operators for\ndifferent quantum numbers are used in the framework of distillation with\ndifferent smearing profiles to increase the overlap with ground and excited\nstates. The use of exact distillation, large statistics and the absence of\nlight quarks gives robust results for the charmonium spectrum. We also present\npreliminary results for the glueball spectrum in this theory.",
        "category": "hep"
    },
    {
        "text": "D-branes on Calabi-Yau Manifolds and Superpotentials: We show how to compute terms in an expansion of the world-volume\nsuperpotential for fairly general D-branes on the quintic Calabi-Yau using\nlinear sigma model techniques, and show in examples that this superpotential\ncaptures the geometry and obstruction theory of bundles and sheaves on this\nCalabi-Yau.",
        "category": "hep"
    },
    {
        "text": "Non-unimodular reductions and N = 4 gauged supergravities: We analyze the class of four-dimensional N = 4 supergravities obtained by\ngauging the axionic shift and axionic rescaling symmetries. These theories are\nformulated with the machinery of embedding tensors and shown to be deducible\nfrom higher dimensions using a Scherk--Schwarz reduction with a twist by a\nnon-compact symmetry. This allows to evade the usual unimodularity requirement\nand completes the dictionary between heterotic gaugings and fluxes, at least\nfor the \"geometric sector\".",
        "category": "hep"
    },
    {
        "text": "Evidence for single top quark production at D0: The results of the first analysis to show evidence for production of single\ntop quarks are presented. Using 0.9 fb-1 of data collected with the D0 detector\nat the Fermilab Tevatron, the analysis is performed in the electron+jets and\nmuon+jets decay modes, taking special care in modeling the large backgrounds,\napplying a new powerful b-quark tagging algorithm and using three multivariate\ntechniques to extract the small signal in the data. The combined measured\nproduction cross section is 4.8 +- 1.3 pb. The probability to measure a cross\nsection at this value or higher in the absence of a signal is 0.027%,\ncorresponding to a 3.5 standard deviation significance.",
        "category": "hep"
    },
    {
        "text": "Atomic parity violation in the economical 3-3-1 model: The deviation $\\de Q_{\\mathrm{W}}$ of the weak charge from its standard model\nprediction due to the mixing of the $W$ boson with the charged bilepton $Y$ as\nwell as of the $Z$ boson with the neutral $Z'$ and the real part of the\nnon-Hermitian neutral bilepton $X$ in the economical 3-3-1 model is\nestablished. Additional contributions to the usual $\\de Q_\\mathrm{W}$\nexpression in the extra $\\mathrm{U}(1)$ models and the left-right models are\nobtained. Our calculations are quite different from previous analyzes in this\nkind of the 3-3-1 models and give the limit on mass of the $Z'$ boson, the\n$Z-Z'$ and $W-Y$ mixing angles with the more appropriate values: $M_{Z'} > 564\\\n\\mathrm{GeV}, -0.018<\\sin \\va < 0$ and $|\\sin \\theta| < 0.043$.",
        "category": "hep"
    },
    {
        "text": "Improved Sterile Neutrino Constraints from the STEREO Experiment with\n  179 Days of Reactor-On Data: The STEREO experiment is a very short baseline reactor antineutrino\nexperiment. It is designed to test the hypothesis of light sterile neutrinos\nbeing the cause of a deficit of the observed antineutrino interaction rate at\nshort baselines with respect to the predicted rate, known as the reactor\nantineutrino anomaly. The STEREO experiment measures the antineutrino energy\nspectrum in six identical detector cells covering baselines between 9 and 11 m\nfrom the compact core of the ILL research reactor. In this article, results\nfrom 179 days of reactor turned on and 235 days of reactor turned off are\nreported at a high degree of detail. The current results include improvements\nin the modelling of detector optical properties and the gamma-cascade after\nneutron captures by gadolinium, the treatment of backgrounds, and the\nstatistical method of the oscillation analysis. Using a direct comparison\nbetween antineutrino spectra of all cells, largely independent of any flux\nprediction, we find the data compatible with the null oscillation hypothesis.\nThe best-fit point of the reactor antineutrino anomaly is rejected at more than\n99.9% C.L.",
        "category": "hep"
    },
    {
        "text": "Strong-Field Breit-Wheeler Pair Production in Short Laser Pulses:\n  Identifying Multiphoton Interference and Carrier-Envelope-Phase Effects: The creation of electron-positron pairs by the strong-field Breit-Wheeler\nprocess in intense short laser pulses is investigated in the framework of\nlaser-dressed quantum electrodynamics. Regarding laser field parameters in the\nmultiphoton regime, special attention is brought to the energy spectrum of the\ncreated particles, which can be reproduced and explained by means of an\nintuitive model. The model is based on the probabilities of multiphoton events\ndriven by the spectral components of the laser pulse. It allows, in particular,\nto identify interferences between different pair production channels which\nexhibit a characteristic dependence on the laser carrier-envelope phase.",
        "category": "hep"
    },
    {
        "text": "Aharonov-Bohm phases in a quantum LC circuit: We study novel types of contributions to the partition function of the\nMaxwell system defined on a small compact manifold. These contributions, often\nnot addressed in the perturbative treatment with physical photons, emerge as a\nresult of tunneling transitions between topologically distinct but physically\nidentical vacuum winding states. These new terms give an extra contribution to\nthe Casimir pressure, yet to be measured. We argue that this effect is highly\nsensitive to a small external electric field, which should be contrasted with\nthe conventional Casimir effect where the vacuum photons are essentially\nunaffected by any external field. Furthermore, photons will be emitted from the\nvacuum in response to a time-dependent electric field, similar to the dynamical\nCasimir effect in which real particles are radiated from the vacuum due to the\ntime-dependent boundary conditions. We also propose an experimental setup using\na quantum LC circuit to detect this novel effect. We expect physical electric\ncharges to appear on the capacitor plates when the system dimension is such\nthat coherent Aharonov-Bohm phases can be maintained over macroscopically large\ndistances.",
        "category": "hep"
    },
    {
        "text": "Dielectric correction to the Chiral Magnetic Effect: We derive an electric current density $j_{em}$ in the presence of a magnetic\nfield $B$ and a chiral chemical potential $\\mu_5$. We show that $j_{em}$ has\nnot only the anomaly-induced term $\\propto \\mu_5 B$ (i.e. Chiral Magnetic\nEffect) but also a non-anomalous correction which comes from interaction\neffects and expressed in terms of the susceptibility. We find the correction\ncharacteristically dependent on the number of quark flavors. The numerically\nestimated correction turns out to be a minor effect on heavy-ion collisions but\ncan be tested by the lattice QCD simulation.",
        "category": "hep"
    },
    {
        "text": "Finite Volume Phases of Large N Gauge Theories with Massive Adjoint\n  Fermions: The phase structure of QCD-like gauge theories with fermions in various\nrepresentations is an interesting but generally analytically intractable\nproblem. One way to ensure weak coupling is to define the theory in a small\nfinite volume, in this case S^3 x S^1. Genuine phase transitions can then occur\nin the large N theory. Here, we use this technique to investigate SU(N) gauge\ntheory with a number N_f of massive adjoint-valued Majorana fermions having\nnon-thermal boundary conditions around S^1. For N_f =1 we find a line of\ntransitions that separate the weak-coupling analogues of the confined and\nde-confined phases for which the density of eigenvalues of the Wilson line\ntransform from the uniform distribution to a gapped distribution. However, the\nsituation for N_f >1 is much richer and a series of weak-coupling analogues of\npartially-confined phases appear which leave unbroken a Z_p subgroup of the\ncentre symmetry. In these Z_p phases the eigenvalue density has p gaps and they\nare separated from the confining phase and from one-another by first order\nphase transitions. We show that for small enough mR (the mass of the fermions\ntimes the radius of the S^3) only the confined phase exists. The large N phase\ndiagram is consistent with the finite N result and with other approaches based\non R^3 x S^1 calculations and lattice simulations.",
        "category": "hep"
    },
    {
        "text": "Energy Loss of a Heavy Particle near 3D Charged Rotating Hairy Black\n  Hole: In this paper we consider charged rotating black hole in 3 dimensions with an\nscalar charge and discuss about energy loss of heavy particle moving near the\nblack hole horizon. We also study quasi-normal modes and find dispersion\nrelations. We find that the effect of scalar charge and electric charge is\nincreasing energy loss.",
        "category": "hep"
    },
    {
        "text": "Entanglement Renyi Entropies in Conformal Field Theories and Holography: An entanglement Renyi entropy for a spatial partition of a system is studied\nin conformal theories which admit a dual description in terms of an anti-de\nSitter gravity. The divergent part of the Renyi entropy is computed in 4D\nconformal N=4 super Yang-Mills theory at a weak coupling. This result is used\nto suggest a holographic formula which reproduces the Renyi entropy at least in\nthe leading approximation. The holographic Renyi entropy is an invariant\nfunctional set on a codimension 2 minimal hypersurface in the bulk geometry.\nThe bulk space does not depend on order $n$ of the Renyi entropy. The\nholographic Renyi entropy is a sum of local and non-local functionals\nmultiplied by polynomials of $1/n$.",
        "category": "hep"
    },
    {
        "text": "Exotica and discreteness in the classification of string spectra: I discuss the existence of discrete properties in the landscape of free\nfermionic heterotic-string vacua that were discovered via their classification\nby SO(10) GUT models and its subgroups such as the Pati-Salam, Flipped SU(5)\nand SU(4) x SU(2) x U(1) models. The classification is carried out by fixing a\nset of basis vectors and varying the GGSO projection coefficients entering the\none-loop partition function. The analysis of the models is facilitated by\nderiving algebraic expressions for the GSO projections that enable a\ncomputerised analysis of the entire string spectrum and the scanning of large\nspaces of vacua. The analysis reveals discrete symmetries like the\nspinor-vector duality observed at the SO(10) level and the existence of\nexophobic Pati-Salam vacua. Contrary to the Pati-Salam case the classification\nshows that there are no exophobic Flipped SU(5) vacua with an odd number of\ngenerations. It is observed that the SU(4) x SU(2) x U(1) models are\nsubstantially more constrained.",
        "category": "hep"
    },
    {
        "text": "Implications of recent MINER$\u03bd$A results for neutrino energy\n  reconstruction: Among the most important tasks of neutrino oscillation experiments is\ncorrectly estimating the parent neutrino energy from the by-products of their\ninteractions. Large uncertainties in our current understanding of such\nprocesses can significantly hamper this effort. We explore several recent\nmeasurements made using the \\mnv{} detector in the few-GeV NuMI muon neutrino\nbeam at Fermilab: the differential cross-section vs. $Q^2$ for charged-current\nquasi-elastic scattering, the differential cross-sections vs. pion angle and\npion kinetic energy for resonant single charged pion production, and the\ndifferential cross-sections vs. pion angle and kinetic energy for coherent pion\nproduction. We furthermore discuss their implications for energy reconstruction\nin oscillation measurements.",
        "category": "hep"
    },
    {
        "text": "Fuzzy de Sitter Space: We discuss properties of fuzzy de Sitter space defined by means of algebra of\nthe de Sitter group $\\mathrm{SO}(1,4)$ in unitary irreducible representations.\nIt was shown before that this fuzzy space has local frames with metrics that\nreduce, in the commutative limit, to the de Sitter metric. Here we determine\nspectra of the embedding coordinates for $(\\rho,s=\\frac 12)$ unitary\nirreducible representations of the principal continuous series of the\n$\\mathrm{SO}(1,4)$. The result is obtained in the Hilbert space representation,\nbut using representation theory it can be generalized to all representations of\nthe principal continuous series.",
        "category": "hep"
    },
    {
        "text": "On Skyrmion semiclassical quantization in the presence of an isospin\n  chemical potential: The semiclassical description of Skyrmions at small isospin chemical\npotential $\\mu_I$ is carefully analyzed. We show that when the calculation of\nthe energy of a nucleon is performed using the straightforward generalization\nof the vacuum sector techniques ($\\mu_I=0$), together with the \"natural\"\nassumption $\\mu_I = {\\cal O} (N_c^0)$, the proton and neutron masses are\nnonlinear in $\\mu_I$ in the regime $|\\mu_I| < m_\\pi$. Although these\nnonlinearities turn out to be numerically quite small, such a result fails to\nstrictly agree with the very robust prediction that for those values of $\\mui$\nthe energy excitations above the vacuum are linear in $\\mu_I$. The resolution\nof this paradox is achieved by studying the realization of the large $N_c$\nlimit of $QCD$ in the Skyrme model at finite $\\mui$. This is done in a\nsimplified context devoid of the technical complications present in the Skyrme\nmodel but which fully displays the general scaling behavior with $N_c$. The\nanalysis shows that the paradoxical result appears as a symptom of using the\nsemi-classical approach beyond its regime of validity and that, at a formal\nlevel, the standard methods for dealing with the Skyrme model are only strictly\njustified for states of high isospin $I \\sim N_c$.",
        "category": "hep"
    },
    {
        "text": "Euclidean quantum gravity and stochastic approach: Physical reality of\n  complex-valued instantons: In this talk, we compare two states: the stationary state in stochastic\ninflation and the ground state wave function of the universe. We already know\nthat, for the potential with a static field, two pictures give the same\nprobability distribution. Here, we go beyond this limit and assert that two\npictures indeed have deeper relations. We illustrate a simple example so that\nthere is a corresponding instanton if a certain field value has a non-zero\nprobability in the statistical side. This instanton should be complex-valued.\nFurthermore, the compact manifold in the Euclidean side can be interpreted as a\ncoarse-graining grid size in the stochastic universe. Finally, we summarize the\nrecent status and possible applications.",
        "category": "hep"
    },
    {
        "text": "Finite Temperature QED: Non-Cancellation of Infrared Divergencies and\n  Thermal Corrections to the Electron Magnetic Moment: In this work quantum electrodynamics at T > 0 is considered. For this purpose\nwe use thermo field dynamics and the causal approach to quantum field theory\naccording to Epstein and Glaser, the latter being a rigorous method to avoid\nthe well-known ultraviolet divergencies of quantum field theory. It will be\nshown that the theory is infrared divergent if the usual scattering states are\nused. The same is true if we use more general mixed states. This is in\ncontradiction to the results established in the literature, and we will point\nout why these earlier approaches fail to describe the infrared behaviour\ncorrectly. We also calculate the thermal corrections to the electron magnetic\nmoment in the low temperature approximation k_B T << m_e. This is done by\ninvestigating the scattering of an electron on a C-number potential in third\norder in the limit of small momentum transfer p -> q. We reproduce one of the\ndifferent results reported up to now in literature. In the low temperature\napproximation infrared finiteness is recovered in a very straightforward way:\nIn contrast to the literature we do not have to introduce a thermal Dirac\nequation or thermal spinors.",
        "category": "hep"
    },
    {
        "text": "The AdS(4) x CP(3) string and its Bethe equations in the near plane wave\n  limit: We perform a detailed study of bosonic type IIA string theory in a large\nlight-cone momentum / near plane wave limit of $AdS_4 \\times CP_3$. In order to\nattain this we derive the Hamiltonian up to cubic and quartic order in number\nof fields and calculate the energies for string excitations in a $R\\times S^2\n\\times S^2$ subspace. The computation for the string energies is performed for\narbitrary length excitations utilizing an unitary transformation which allows\nus to remove the cubic terms in the Hamiltonian. We then rewrite a recent set\nof proposed all loop Bethe equations in a light-cone language and compare their\npredictions with the obtained string energies. We find perfect agreement.",
        "category": "hep"
    },
    {
        "text": "Inverse Magnetic Catalysis in hot quark matter within (P)NJL models: Apart from Magnetic Catalysis at low temperatures, recent LQCD studies have\nshown the opposite effect at temperatures near the transition region: instead\nof enhancing, the magnetic field suppresses the quark condensates (Inverse\nMagnetic Catalysis). In this paper, two approaches are discussed within\nNJL-type models with Polyakov Loop that reproduce both effects.",
        "category": "hep"
    },
    {
        "text": "Note on the conjectured breakdown of QED perturbation theory in strong\n  fields: Strong background fields require a non-perturbative treatment, which is\nafforded in QED by the Furry expansion of scattering amplitudes. It has been\nconjectured that this expansion breaks down for sufficiently strong fields,\nbased on the asymptotic growth of loop corrections with increasing \"quantum\nnonlinearity\", essentially the product of field strength and particle energy.\nHowever, calculations to date have assumed that the background is constant. We\nshow here, using general plane waves of finite duration, that observables at\nhigh quantum nonlinearity scale differently depending on whether intensity or\nenergy is large. We find that, at high energy, loop contributions to\nobservables tend to fall with increasing quantum nonlinearity, rather than\ngrow.",
        "category": "hep"
    },
    {
        "text": "Symplectic Fermions: We study two-dimensional conformal field theories generated from a\n``symplectic fermion'' - a free two-component fermion field of spin one - and\nconstruct the maximal local supersymmetric conformal field theory generated\nfrom it. This theory has central charge c=-2 and provides the simplest example\nof a theory with logarithmic operators.\n  Twisted states with respect to the global SL(2,C)-symmetry of the symplectic\nfermions are introduced and we describe in detail how one obtains a consistent\nset of twisted amplitudes. We study orbifold models with respect to finite\nsubgroups of SL(2,C) and obtain their modular invariant partition functions. In\nthe case of the cyclic orbifolds explicit expressions are given for all two-,\nthree- and four-point functions of the fundamental fields. The C_2-orbifold is\nshown to be isomorphic to the bosonic local logarithmic conformal field theory\nof the triplet algebra encountered previously. We discuss the relation of the\nC_4-orbifold to critical dense polymers.",
        "category": "hep"
    },
    {
        "text": "On the W-gravity spectrum and its G-structure: We present results for the BRST cohomology of $\\cW[\\bfg]$ minimal models\ncoupled to $\\cW[\\bfg]$ gravity, as well as scalar fields coupled to $\\cW[\\bfg]$\ngravity. In the latter case we explore an intricate relation to the (twisted)\n$\\bfg$ cohomology of a product of two twisted Fock modules.",
        "category": "hep"
    },
    {
        "text": "The Flavor and Spin Structure of Hyperons from Quark Fragmentation: We systematically study the hadron longitudinal polarizations of the octet\nbaryons at large $z$ from quark fragmentations in $e^+e^-$-annihilation,\npolarized charged lepton deep inelastic scattering (DIS) process, and neutrino\n(antineutrino) DIS process, based on predictions of quark distributions for the\noctet baryons in the SU(6) quark-spectator-diquark model and a perturbative QCD\nbased counting rule analysis. We show that the $e^+e^-$-annihilation and\npolarized charged lepton DIS process are able to distinguish between the two\ndifferent predictions of the hyperon polarizations. We also find that the\nneutrino/antineutrino DIS process is ideal in order to study both the valence\ncontent of the hyperons and the antiquark to hyperon (quark to anti-hyperon)\nfragmentations, which might be related to the sea content of hyperons.",
        "category": "hep"
    },
    {
        "text": "Measurements of CKM angle $\u03c6_3$ at BELLE: We report recent results on $\\phi_3$ measurement at the Belle collaboration.\nThe analyses reported here are based on a large data sample that contains 657\nmillion $B\\bar{B}$ pairs collected with the Belle detector at the KEKB\nasymmetric-energy $e^+ e^-$ collider at the $\\Upsilon(4S)$ resonance.",
        "category": "hep"
    },
    {
        "text": "The role of zero-mode contributions in the matching for the twist-3 PDFs\n  $e(x)$ and $h_{L}(x)$: The perturbative procedure of matching was proposed to connect parton\nquasi-distributions that are calculable in lattice QCD to the corresponding\nlight-cone distributions which enter physical processes. Such a matching\nprocedure has so far been limited to the twist-2 distributions. Recently, we\naddressed the matching for the twist-3 PDF $g_T(x)$. In this work, we extend\nour perturbative calculations to the remaining twist-3 PDFs, $e(x)$ and\n$h_{L}(x)$. In particular, we discuss the non-trivialities involved in the\ncalculation of the singular zero-mode contributions for the quasi-PDFs.",
        "category": "hep"
    },
    {
        "text": "Extended chiral Group and Scalar Diquarks: We introduce extended chiral transformation, which depends both on\npseudoscalar and diquark fields as parameters and determine its group\nstructure. Assuming soft symmetry breaking in diquark sector, bosonisation of a\nquasi-Goldstone $ud$-diquark is performed. In the chiral limit the $ud$-diquark\nmass is defined by the gluon condensate, $m_{ud}\\approx 300 MeV$. The diquark\ncharge radius is $<r^2_{ud}>^{1/2}\\approx 0.5 fm$. We consider also the flavour\ntriplet of scalar diquarks $(ud)$, $(us)$ and $(ds)$ together with pseudoscalar\nmesons and calculate diquark masses and decay constants in terms of meson\nparameters and the gluon condensate.",
        "category": "hep"
    },
    {
        "text": "Study of the strong $\u03a3_c\\to \u039b_c \u03c0$, $\u03a3_c^{*}\\to\n  \u039b_c \u03c0$ and $\u039e_c^{*}\\to \u039e_c \u03c0$ decays in a nonrelativistic quark\n  model: We present results for the strong widths corresponding to the $\\Sigma_c\\to\n\\Lambda_c \\pi$, $\\Sigma_c^{*}\\to \\Lambda_c \\pi$ and $\\Xi_c^{*}\\to \\Xi_c \\pi$\ndecays. The calculations have been done in a nonrelativistic constituent quark\nmodel with wave functions that take advantage of the constraints imposed by\nheavy quark symmetry. Partial conservation of axial current hypothesis allows\nus to determine the strong vertices from an analysis of the axial current\nmatrix elements. Our results \\hbox{$\\Gamma(\\Sigma_c^{++}\\to \\Lambda_c^+\n\\pi^+)=2.41 \\pm0.07\\pm0.02 \\mathrm{MeV}$}, {$\\Gamma(\\Sigma_c^{+}\\to \\Lambda_c^+\n\\pi^0)=2.79 \\pm0.08\\pm0.02 \\mathrm{MeV}$}, {$\\Gamma(\\Sigma_c^{0}\\to \\Lambda_c^+\n\\pi^-)=2.37 \\pm0.07\\pm0.02 \\mathrm{MeV}$}, {$\\Gamma(\\Sigma_c^{* ++}\\to\n\\Lambda_c^+ \\pi^+)=17.52\\pm0.74\\pm0.12 \\mathrm{MeV}$}, {$\\Gamma(\\Sigma_c^{*\n+}\\to \\Lambda_c^+ \\pi^0)=17.31\\pm0.73\\pm0.12 \\mathrm{MeV}$},\n{$\\Gamma(\\Sigma_c^{* 0}\\to \\Lambda_c^+ \\pi^-)=16.90\\pm0.71\\pm0.12\n\\mathrm{MeV}$}, {$\\Gamma(\\Xi_c^{* +}\\to \\Xi_c^0\n\\pi^++\\Xi_c^+\\pi^0)=3.18\\pm0.10\\pm0.01 \\mathrm{MeV}$} and {$\\Gamma(\\Xi_c^{*\n0}\\to \\Xi_c^+ \\pi^-+\\Xi_c^0\\pi^0)=3.03\\pm0.10\\pm0.01 \\mathrm{MeV}$} are in good\nagreement with experimental determinations.",
        "category": "hep"
    },
    {
        "text": "Cosmology for Particle Physicists: In these notes we present a selection of topics, each section approximately\namounting to one lecture. We begin with a brief recapitulation of General\nRelativity, and the Standard Model of Cosmology. This is followed by lectures\non important signatures of the remote past. These include : (i) inflation, (ii)\ndensity perturbations leading to galaxy formation, (iii) study of hot and cold\nrelics decoupled from the remaining constituents, some of which can be\ncandidates for Dark Matter, (iv) baryon asymmetry of the Universe.",
        "category": "hep"
    },
    {
        "text": "Variable Flavor Number Scheme for Final State Jets in Thrust: We present results for mass effects coming from secondary radiation of heavy\nquark pairs related to gluon splitting in the thrust distribution for e+e-\ncollisions. The results are given in the dijet limit where the hard interaction\nscale and the scales related to collinear and soft radiation are widely\nseparated. We account for the corresponding fixed-order corrections at\nO(alpha_s^2) and the summation of all logarithmic terms related to the hard,\ncollinear and soft scales as well as the quark mass at N3LL order. We also\nremove the O(Lambda_QCD) renormalon in the partonic soft function leading to an\ninfrared evolution equation with a matching condition related to the massive\nquark threshold. The quark mass can be arbitrary, ranging from the infinitely\nheavy case, where decoupling takes place, down to the massless limit where the\nresults smoothly merge into the well known predictions for massless quarks. Our\nresults are formulated in the framework of factorization theorems for e+e-\ndijet production and provide universal threshold corrections for the\nrenormalization group evolution of the hard current, the jet and soft functions\nat the scale where the massive quarks are integrated out. The results represent\na first explicit realization of a variable flavor number scheme for final state\njets along the lines of the well known flavor number dependent evolution of the\nstrong coupling alpha_s and the parton distribution functions.",
        "category": "hep"
    },
    {
        "text": "Renormalization of beta decay at three loops and beyond: The anomalous dimension for heavy-heavy-light effective theory operators\ndescribing nuclear beta decay is computed through three-loop order in the\nstatic limit. The result at order $Z^2\\alpha^3$ corrects a previous result in\nthe literature. An all-orders symmetry is shown to relate the anomalous\ndimensions at leading and subleading powers of $Z$ at a given order of\n$\\alpha$. The first unknown coefficient for the anomalous dimension now appears\nat $O(Z^2\\alpha^4)$.",
        "category": "hep"
    },
    {
        "text": "Lattice Matter: I review recent developments in the study of strongly interacting field\ntheories with non-zero chemical potential mu. In particular I focus on (a) the\ndetermination of the QCD critical endpoint in the (mu,T) plane; (b) superfluid\ncondensates in Two Color QCD; and (c) Fermi surface effects in the NJL model.\nSome remarks are made concerning the relation of superconductivity with the\nsign problem.",
        "category": "hep"
    },
    {
        "text": "Lepton Flavor Violating Process in Degenerate and Inverse-Hierarchical\n  Neutrino Models: We have investigated the lepton flavor violation in the supersymmetric\nframework assuming the large mixing angle MSW solution with the\nquasi-degenerate and the inverse-hierarchical neutrino masses. In the case of\nthe quasi-degenerate neutrinos, the predicted branching ratio BR$(\\mu \\to e\n\\gamma)$ strongly depends on $m_\\nu$ and $U_{e3}$. For $U_{e3}\\simeq 0.05$ with\n$m_\\nu \\simeq 0.3 \\eV$, the prediction is close to the present experimental\nupper bound if the right-handed Majorana neutrino masses are degenerate. On the\nother hand, the prediction is larger than the experimental upper bound for\n$U_{e3}\\geq 0.05$ in the case of the inverse-hierarchical neutrino masses.",
        "category": "hep"
    },
    {
        "text": "Constraining Dissipative Dark Matter Self-Interactions: We study the gravothermal evolution of dark matter halos in the presence of\ndissipative dark matter self-interactions. Dissipative interactions are present\nin many particle-physics realizations of the dark-sector paradigm and can\nsignificantly accelerate the gravothermal collapse of halos compared to purely\nelastic dark matter self-interactions. This is the case even when the\ndissipative interaction timescale is longer than the free-fall time of the\nhalo. Using a semianalytical fluid model calibrated with isolated and\ncosmological $N$-body simulations, we calculate the evolution of the halo\nproperties -- including its density profile and velocity dispersion profile --\nas well as the core-collapse time as a function of the particle model\nparameters that describe the interactions. A key property is that the inner\ndensity profile at late times becomes cuspy again. Using 18 dwarf galaxies that\nexhibit a corelike dark matter density profile, we derive constraints on the\nstrength of the dissipative interactions and the energy loss per collision.",
        "category": "hep"
    },
    {
        "text": "Benchmarking regulator-sourced 2PI and average 1PI flow equations in\n  zero dimensions: We elucidate the regulator-sourced 2PI and average 1PI approaches for\nderiving exact flow equations in the case of a zero dimensional quantum field\ntheory, wherein the scale dependence of the usual renormalisation group\nevolution is replaced by a simple parametric dependence. We show that both\napproaches are self-consistent, while highlighting key differences in their\nbehaviour and the structure of the would-be loop expansion.",
        "category": "hep"
    },
    {
        "text": "Jet analysis by Deterministic Annealing: We perform a comparison of two jet clusterization algorithms. The first one\nis the standard Durham algorithm and the second one is a global optimization\nscheme, Deterministic Annealing, often used in clusterization problems, and\nadapted to the problem of jet identification in particle production by high\nenergy collisions; in particular we study hadronic jets in WW production by\nhigh energy electron positron scattering. Our results are as follows. First, we\nfind that the two procedures give basically the same output as far as the\nparticle clusterization is concerned. Second, we find that the increase of CPU\ntime with the particle multiplicity is much faster for the Durham jet\nclustering algorithm in comparison with Deterministic Annealing. Since this\nresult follows from the higher computational complexity of the Durham scheme,\nit should not depend on the particular process studied here and might be\nsignificant for jet physics at LHC as well.",
        "category": "hep"
    },
    {
        "text": "Gauge Theory and the Analytic Form of the Geometric Langlands Program: We present a gauge-theoretic interpretation of the \"analytic\" version of the\ngeometric Langlands program, in which Hitchin Hamiltonians and Hecke operators\nare viewed as concrete operators acting on a Hilbert space of quantum states.\nThe gauge theory ingredients required to understand this construction -- such\nas electric-magnetic duality between Wilson and 't Hooft line operators in\nfour-dimensional gauge theory -- are the same ones that enter in understanding\nvia gauge theory the more familiar formulation of geometric Langlands, but now\nthese ingredients are organized and applied in a novel fashion.",
        "category": "hep"
    },
    {
        "text": "Fluid/Gravity Correspondence, Local Wald Entropy Current and\n  Gravitational Anomaly: We propose, in the framework of the fluid/gravity correspondence, a\ndefinition for a local horizon entropy current for higher-curvature\ngravitational theories. The current is well-defined to first order in fluid\ngradients for general gravity actions with an algebraic dependence on the\nRiemann tensor. As a detailed example, we consider five-dimensional\nEinstein-Maxwell theory with a mixed gauge-gravitational Chern-Simons term. In\nthis theory, we construct the proposed entropy current on a charged black-brane\nbackground, and show that it has a non-negative divergence. Moreover, a\ncomplete correspondence between the charged black-brane horizon's dynamics and\nthe hydrodynamics of an anomalous four-dimensional field theory is established.\nOur proposed entropy current is then found to coincide with the entropy current\nof the anomalous field theory fluid.",
        "category": "hep"
    },
    {
        "text": "Mono-Higgs Signature in the Scotogenic Model with Majorana Dark Matter: We study the phenomenology of scotogenic model in the case of Majorana Dark\nMatter (DM) candidate. This scenario gives important consequences since the\nparameter space of the model is almost unconstrained compared to the Inert\nHiggs Doublet Model (or the scotogenic model with scalar DM), and hence, offers\nnew opportunities for discovery at future high energy collider, e.g. the\nHL-LHC. As an example, we focus on the production of the Standard Model (SM)\nHiggs boson in association with a pair of dark scalars. Owing to its clean\nsignature, the $\\gamma\\gamma$ decay channel of the SM Higgs boson is\ninvestigated in great detail at both the HL-LHC (at $\\sqrt{s}=14$ TeV) and the\nfuture FCC-hh (at $\\sqrt{s}=100$ TeV). After revisiting the LHC constraints\nfrom run-II on the parameter space of the model, and selecting benchmark points\nsatisfying all the theoretical and experimental constraints, we found that\nscalars with mass up to $140$ GeV ($160$ GeV) can be probed at the LHC (FCC-hh)\nwith a $3$ ab$^{-1}$ of integrated luminosity assuming $5\\%$ of uncertainty.",
        "category": "hep"
    },
    {
        "text": "Lectures on (abelian) Chern-Simons vortices: Various aspects including the construction and the symmetries of Abelian\nChern-Simons vortices are reviewed. Extended version of the Lectures delivered\nat NIKHEF (Amsterdam), July 2006. Typos corrected, some refernces added.",
        "category": "hep"
    },
    {
        "text": "Sensitivity measuring expected on the electromagnetic anomalous\n  couplings in the $t\\bar t\u03b3$ vertex at the FCC-he: In this paper, we consider the electroweak production cross-section of a\nsingle anti-top-quark, a neutrino and a photon via charged current through the\n$e^-p \\to e^-\\bar b \\to \\bar t \\nu_e \\gamma \\to \\bar t(\\to W^- \\to (qq', l^-\n\\bar\\nu_l)+b) \\nu_e\\gamma$ signal. Further, we derived the sensitivity expected\nto the magnetic dipole moment $(\\hat a_V)$ and the electric dipole moment\n$(\\hat a_A)$ of the top-quark at the Future Circular Collider Hadron Electron\n(FCC-he). We present our study for $\\sqrt{s}=7.07, 10\\hspace{0.8mm}TeV$, ${\\cal\nL}=50, 100, 300, 500, 1000\\hspace{0.8mm}fb^{-1}$, $\\delta_{sys}=0, 3,\n5\\hspace{0.8mm}\\%$ and $P_{e^-}=0\\%, 80\\%, -80\\%$, respectively. We find that\nthe sensitivity estimated on dipole moments of the top-quark is of the order of\nmagnitude ${\\cal O}(10^{-1})$ for both hadronic and leptonic decay modes of\n$W^-$: $\\hat a_V=[-0.2308, 0.2204]$, $|\\hat a_A|=0.2259$ at $95\\%$ C.L. in the\nhadronic channel with unpolarized electron beam $P_{e^-}=0\\%$. Our results with\npolarized electron beam for $P_{e^-}=80\\%$ and $P_{e^-}=-80\\%$ are $\\hat\na_V=[-0.3428, 0.3321]$, $|\\hat a_A|=0.3371$ and $\\hat a_V=[-0.2041, 0.1858]$,\n$|\\hat a_A|=0.1939$ at $95\\%$ C.L. in the hadronic channel. The corresponding\nresults for the leptonic channel with $P_{e^-}=0\\%, 80\\% -80\\%$ are $\\hat\na_V=[-0.3067, 0.2963]$, $|\\hat a_A|=0.3019$, $\\hat a_V=[-0.4563, 0.4456]$,\n$|\\hat a_A|=0.4505$ and $\\hat a_V=[-0.2695, 0.2512]$, $|\\hat a_A|=0.2592$,\nrespectively. The results for $\\hat a_V$ and $\\hat a_A$ in the leptonic channel\nare weaker by a factor of 0.75 than those corresponding to the hadronic\nchannel. Given these prospective sensitivities we highlight that the FCC-he is\npotential top-quark factory that is particularly well suited to sensitivity\nstudy on its dipole moments and with cleaner environments.",
        "category": "hep"
    },
    {
        "text": "Critical behaviors near the (tri-)critical end point of QCD within the\n  NJL model: We investigate the dynamical chiral symmetry breaking and its restoration at\nfinite density and temperature within the two-flavor Nambu-Jona-Lasinio model,\nand mainly focus on the critical behaviors near the critical end point (CEP)\nand tricritical point (TCP) of quantum chromodynamics. The multi-solution\nregion of the Nambu and Wigner ones is determined in the phase diagram for the\nmassive and massless current quark, respectively. We use the various\nsusceptibilities to locate the CEP/TCP and then extract the critical exponents\nnear them. Our calculations reveal that the various susceptibilities share the\nsame critical behaviors for the physical current quark mass, while they show\ndifferent features in the chiral limit.",
        "category": "hep"
    },
    {
        "text": "Z' boson detection in the Minimal Quiver Standard Model: We undertake a phenomenological study of the extra neutral Z' boson in the\nMinimal Quiver Standard Model and discuss limits on the model's parameters from\nprevious precision electroweak experiments, as well as detection prospects at\nthe Large Hadron Collider at CERN. We find that masses lower than around 700\nGeV are excluded by the $Z$-pole data from the CERN-LEP collider, and below 620\nGeV by experimental data from di-electron events at the Fermilab-Tevatron\ncollider. We also find that at a mass of 1 TeV the LHC cross section would show\na small peak in the di-lepton and top pair channel.",
        "category": "hep"
    },
    {
        "text": "Generalized Poincare algebras and Lovelock-Cartan gravity theory: We show that the Lagrangian for Lovelock-Cartan gravity theory can be\nre-formulated as an action which leads to General Relativity in a certain\nlimit. In odd dimensions the Lagrangian leads to a Chern-Simons theory\ninvariant under the generalized Poincar\\'{e} algebra $\\mathfrak{B}_{2n+1},$\nwhile in even dimensions the Lagrangian leads to a Born-Infeld theory invariant\nunder a subalgebra of the $\\mathfrak{B}_{2n+1}$ algebra. It is also shown that\ntorsion may occur explicitly in the Lagrangian leading to new torsional\nLagrangians, which are related to the Chern-Pontryagin character for the\n$B_{2n+1}$ group.",
        "category": "hep"
    },
    {
        "text": "Correlated Disorder in the SYK$_{2}$ model: We study the SYK$_{2}$ model of $N$ Majorana fermions with random quadratic\ninteractions through a detailed spectral analysis and by coupling the model to\n2- and 4-point sources. In particular, we define the generalized spectral form\nfactor and level spacing distribution function by generalizing from the\npartition function to the generating function. For $N=2$, we obtain an exact\nsolution of the generalized spectral form factor. It exhibits qualitatively\nsimilar behavior to the higher $N$ case with a source term. The exact solution\nhelps understand the behavior of the generalized spectral form factor. We\ncalculate the generalized level spacing distribution function and the mean\nvalue of the adjacent gap ratio defined by the generating function. For the\nSYK$_2$ model with a 4-point source term, we find a Gaussian unitary ensemble\nbehavior in the near-integrable region of the theory, which indicates a\ntransition to chaos. This behavior is confirmed by the connected part of the\ngeneralized spectral form factor with an unfolded spectrum. The departure from\nthis Gaussian random matrix behavior as the relative strength of the source\nterm is increased is consistent with the observation that the 4-point source\nterm alone, without the SYK$_2$ couplings turned on, exhibits an integrable\nspectrum from the spectral form factor and level spacing distribution function\nin the large $N$ limit.",
        "category": "hep"
    },
    {
        "text": "Top-quark production measurements: Recent measurements of top-quark production at hadron colliders are reviewed.\nThe inclusive top-quark pair production is determined at four centre-of-mass\nenergies at Tevatron and LHC with experimental uncertainties that are close to\nthe uncertainties in theoretical calculations at next-to-next-to-leading order\nin QCD. Several differential measurements are performed and compared to\nsimulation. Production of single top quarks is studied in the three different\nproduction channels. Top-quark pair production with neutral and charged vector\nbosons has been observed by the LHC experiments. Finally, production of\nadditional heavy flavour quark pairs ($b\\bar{b}$, $t\\bar{t}$) is studied or\nsearched for.",
        "category": "hep"
    },
    {
        "text": "Newly observed D_{sJ}(3040) and the radial excitations of P-wave\n  charmed-strange mesons: Inspired by the newly observed $D_{sJ}(3040)^+$ state, in this work we\nsystemically study the two-body strong decays of P-wave charmed-strange mesons\nwith the first radial excitation. Under the assignment of $1^{+}(j^P=1/2^+)$,\ni.e. the first radial excitation of $D_{s1}(2460)^+$, we find that the width of\n$D_{sJ}(3040)^+$ is close to the lower limit of the BaBar measurement. This\nindicates that it is reasonable to interpret $D_{sJ}(3040)^+$ as the first\nradial excitation of $D_{s1}(2460)^+$. Our calculation further predicts that\n$0^-+1^-$ channels e.g. $D^+K^{*0}$, $D^0 K^{*+}$ and $D_s^+\\phi$ are important\nfor the search for $D_{sJ}(3040)^+$. To help future experiments finding the\nremaining three P-wave charmed-strange mesons with the first radial excitation,\nwe present the predictions for the strong decays of these three P-wave\ncharmed-strange mesons.",
        "category": "hep"
    },
    {
        "text": "QCD renormalization for the top-quark mass in a mass geometrical mean\n  hierarchy: $QCD$ renormalization for the top-quark mass is calculated in a mass\ngeometrical mean hierarchy, $m_d m_b = m_s^2$ and $m_u m_t = m_c^2$. The\nphysical mass, $m_t(m_t) = 160 {\\pm} 50 GeV$ is obtained, which agrees very\nwell with electroweak precision measurement.",
        "category": "hep"
    },
    {
        "text": "(beta beta)_{0 nu}-decay: a possible test of the nuclear matrix element\n  calculations: The existing calculations of the nuclear matrix elements of the neutrinoless\ndouble beta-decay differ by about a factor three. This uncertainty prevents\nquantative interpretation of the results of experiments searching for this\nprocess. We suggest here that the observation of the neutrinoless double\nbeta-decay of several nuclei in future experiments of could allow to test\ndifferent calculations of the nuclear matrix elements through the direct\ncomparison of them with the experimental data.",
        "category": "hep"
    },
    {
        "text": "Reply to A. Patrascioiu's and E. Seiler's comment on our paper \"The\n  two-phase issue in the O(n) non-linear sigma-model: a Monte Carlo study\": We reply to a comment by A. Patrascioiu and E. Seiler appeared in\nhep-lat/9608138 on our paper hep-lat/9608002.",
        "category": "hep"
    },
    {
        "text": "Effects of Shock Waves on Neutrino Oscillations in Three Supernova\n  Models: It has been realized that the shock wave effects play an important role in\nneutrino oscillations during the supernova explosion. In recent years, with the\ndevelopment of simulations about supernova explosion, we have a better\nunderstanding about the density profiles and the shock waves in supernovae than\nbefore. It has been shown that the appearance of shock waves not only varies\nwith time, but is also affected by the mass of the supernova. When the mass of\nthe supernova happens to be in a certain range (e.g. it equals 10.8 times the\nmass of the sun), there might be a reverse shock wave, another sudden change of\ndensity except the forward shock wave, emerging in the supernova. In addition,\nthere are some other time-dependent changes of density profiles in different\nsupernova models. Because of these complex density profiles, the expression of\nthe crossing probability at the high resonance, $P_H$, which we used previously\nwould be no longer applicable. In order to get more accurate and reasonable\nresults, we use the data of density profiles in three different supernova\nmodels obtained from simulations to study the variations of $P_s$ (the survival\nprobability of $\\nu_e\\rightarrow\\nu_e$), as well as $P_c$ (the conversion\nprobability of $\\nu_x\\rightarrow\\nu_e$). It is found that the mass of the\nsupernova does make a difference on the behavior of $P_s$, and affects $P_c$ at\nthe same time. With the results of $P_s$ and $P_c$, we can estimate the number\nof $\\nu_e$ remained after they go through the matter in the supernova.",
        "category": "hep"
    },
    {
        "text": "Composition of the Pseudoscalar Eta and Eta' Mesons: The composition of the eta and eta' mesons has long been a source of\ndiscussion and is of current interest with new experimental results appearing.\nWe investigate what can be learnt from a number of different processes: V to P\ngamma and P to V gamma (V and P are light vector and pseudoscalar mesons\nrespectively), P to gamma gamma, J/psi,psi' to P gamma, J/psi,psi' to P V, and\nchi_{c0,2} to PP. These constrain the eta-eta' mixing angle to a consistent\nvalue, phi approx 42 degrees; we find that the c cbar components are lesssim 5%\nin amplitude. We also find that, while the data hint at a small gluonic\ncomponent in the eta', the conclusions depend sensitively on unknown form\nfactors associated with exclusive dynamics. In addition, we predict BR(psi' to\neta' gamma) approx 1 10^{-5} and BR(chi_{c0} to eta eta') approx 2 10^{-5} - 1\n10^{-4}. We provide a method to test the mixing using chi_{c2} to eta eta, eta'\neta', and eta eta' modes and make some general observations on chi_{c0,2}\ndecays. We also survey the semileptonic and hadronic decays of bottom and\ncharmed mesons and find some modes where the mixing angle can be extracted\ncleanly with the current experimental data, some where more data will allow\nthis, and some where a more detailed knowledge of the different amplitudes is\nrequired.",
        "category": "hep"
    },
    {
        "text": "The one example of Lorentz group: The aim of this work is to show, on the example of the behaviour of the\nspinless charged particle in the homogeneous electric field, that one can\nquantized the velocity of particle by the special gauge fixation. The work\ngives also the some information about the theory of second quantisation in the\nspace of Hilbert- Fock and the theory of projectors in the Hilbert space. One\nconsider in Appendix the theory of the spinless charged particle in the\nhomogeneous addiabatical changed electrical field.",
        "category": "hep"
    },
    {
        "text": "Taniguchi Lecture on Principal Bundles on Elliptic Fibrations: In this talk we discuss the description of the moduli space of principal\nG-bundles on an elliptic fibration X-->S in terms of cameral covers and their\ndistinguished Prym varieties. We emphasize the close relationship between this\nproblem and the integrability of Hitchin's system and its generalizations. The\ndiscussion roughly parallels that of [D2], but additional examples are included\nand some important steps of the argument are illustrated. Some of the\napplications to heterotic/F-theory duality were described in the accompanying\nICMP talk (hep-th/9802093).",
        "category": "hep"
    },
    {
        "text": "Torsion Limits From $t\\bar{t}$ Production at the LHC: Torsion models constitute a well known class of extended quantum gravity\nmodels. In this work, one investigates the phenomenological consequences of a\ntorsion field interacting with top quarks at the LHC. A torsion field could\nappear as a new heavy state characterized by its mass and couplings to\nfermions. This new state would form a resonance decaying into a top anti-top\npair. The latest ATLAS $t\\bar t$ production results from LHC 13 TeV data are\nused to set limits on torsion parameters. The integrated luminosity needed to\nobserve torsion resonance at the next LHC upgrades are also evaluated,\nconsidering different values for the torsion mass and its couplings to Standard\nModel fermions. Finally, prospects for torsion exclusion at the future LHC\nphases II and III are obtained using fast detector simulations.",
        "category": "hep"
    },
    {
        "text": "Detecting an invisible Higgs boson at Fermilab Tevatron and CERN LHC: In this paper, we study the observability of an invisible Higgs boson at\nFermilab Tevatron and CERN LHC through the production channel $ q \\bar{q} \\to Z\nH \\to \\ell^+\\ell^-+ \\ptmiss $, where $\\ptmiss$ is reconstructed from the\n$\\ell^+\\ell^-$ with $\\ell=e$ or $\\mu$. A new strategy is proposed to eliminate\nthe largest irreducible background, namely $ q \\bar{q} \\to Z(\\to \\ell^+\\ell^-)\nZ(\\to \\nu \\bar\\nu)$. This strategy utilizes the precise measurements of $ q\n\\bar{q} \\to Z(\\to \\ell^+\\ell^-) Z(\\to \\ell^+\\ell^-)$. For $m_H=120$ GeV and\nwith luminosity $30 fb^{-1}$ at Tevatron, a $5\\sigma$ observation of the\ninvisible Higgs boson is possible. For $m_H=114 \\sim 140$ GeV with only $10\nfb^{-1}$ luminosity at LHC, a discovery signal over $5\\sigma$ can be achieved.",
        "category": "hep"
    },
    {
        "text": "Electroweak Symmetry Breaking in the DSSM: We study the theoretical and phenomenological consequences of modifying the\nKahler potential of the MSSM two Higgs doublet sector. Such modifications\nnaturally arise when the Higgs sector mixes with a quasi-hidden conformal\nsector, as in some F-theory GUT models. In the Delta-deformed Supersymmetric\nStandard Model (DSSM), the Higgs fields are operators with non-trivial scaling\ndimension 1 < Delta < 2. The Kahler metric is singular at the origin of field\nspace due to the presence of quasi-hidden sector states which get their mass\nfrom the Higgs vevs. The presence of these extra states leads to the fact that\neven as Delta approaches 1, the DSSM does not reduce to the MSSM. In\nparticular, the Higgs can naturally be heavier than the W- and Z-bosons.\nPerturbative gauge coupling unification, a large top quark Yukawa, and\nconsistency with precision electroweak can all be maintained for Delta close to\nunity. Moreover, such values of Delta can naturally be obtained in\nstring-motivated constructions. The quasi-hidden sector generically contains\nstates charged under SU(5)_GUT as well as gauge singlets, leading to a rich,\nalbeit model-dependent, collider phenomenology.",
        "category": "hep"
    },
    {
        "text": "Measurement of $Br(D^{0}\\to K^{-}\u03c0^{+})$ using Partila Reconstruction\n  of $\\bar{B}\\to D^{*+}X\\ell^{-}\\bar\u03bd$: We present a measurement of the absolute branching fraction for $D^0 -> K^-\npi^+$ using the reconstruction of the decay chain $Bbar -> D^{*+} X l^- nubar\n$, $D^{*+} -> D^0 pi^+$ where only the lepton and the low-momentum pion from\nthe $D^{*+}$ are detected. With data collected by the CLEO II detector at the\nCornell Electron Storage Ring, we have determined $Br(D^0 -> K^- pi^+)= [3.81\n+- 0.15(stat.) +- 0.16(syst.)]%$.",
        "category": "hep"
    },
    {
        "text": "Proton Structure Functions from Chiral Dynamics and QCD Constraints: The spin fractions and deep inelastic structure functions of the proton are\nanalyzed using chiral field theory involving Goldstone bosons. A detailed\ncomparison with recent chiral models sheds light on their successful\ndescription of the spin fractions of the proton as being due to neglecting\nhelicity non-flip chiral transitions. This approximation is valid for zero mass\nquarks but not for constituent quarks. Since the chiral spin fraction models\nwith the pure spin-flip approximation reproduce the measured spin fractions of\nthe proton, axialvector constituent-quark-Goldstone boson coupling is found to\nbe inconsistent with the proton spin data. Initial quark valence distributions\nare then constructed using quark counting constraints at Bjorken $x \\to 1$ and\nRegge behavior at $x \\to 0$. Sea quark distributions predicted by chiral field\ntheory on this basis have correct order of magnitude and shape. The spin\nfractions agree with the data.",
        "category": "hep"
    },
    {
        "text": "IR-improved Soft-wall AdS/QCD Model for Baryons: We construct an infrared-improved soft-wall AdS/QCD model for baryons by\nconsidering the infrared-modified 5D conformal mass and Yukawa coupling of the\nbulk baryon field. The model is also built by taking into account the\nparity-doublet pattern for the excited baryons. When taking the bulk vacuum\nstructure of the meson field to be the one obtained consistently in the\ninfrared-improved soft-wall AdS/QCD model for mesons, we arrive at a consistent\nprediction for the baryon mass spectrum in even and odd parity. The prediction\nshows a remarkable agreement with the experimental data. We also perform a\ncalculation for the $\\rho(a_1)$ meson-nucleon coupling constant and obtain a\nconsistent result in comparison with the experimental data and many other\nmodels.",
        "category": "hep"
    },
    {
        "text": "1-Loop Analysis of the Photon Self-Energy due to 3D-Gravity: A Maxwell-Chern-Simons field is minimally coupled to 3D-gravity. Feynman\nrules are written down and 1-loop corrections to the gauge-field self-energy\nare calculated. Transversality is verified and gauge-field dynamical mass\ngeneration does not take place.",
        "category": "hep"
    },
    {
        "text": "Indirect limits on the CPT violating background in the neutrino sector: CPT violation in the neutrino sector, suggested as a new way to reconcile\ndifferent neutrino anomalies, induces at the radiative level observable effects\namong charged leptons, where high-precision tests of the CPT symmetry are\navailable. We show that, in the models with heavy right-handed Majorana\nneutrinos, constraints imposed by these experiments require CPT violation in\nneutrino spectrum be suppressed to a level undetectable for any conceivable\nneutrino experiment. We find that the CPT violation in the neutrino sector may\nevade indirect constraints only at the expense of light right-handed neutrinos\nwith small Yukawa couplings to the Standard Model sector or by allowing\nnon-locality well below the electroweak scale.",
        "category": "hep"
    },
    {
        "text": "The semileptonic form factors of B and D mesons in the Quark Confinement\n  Model: The form factors of the weak currents, which appear in the semileptonic\ndecays of the heavy pseudoscalar mesons, are calculated within the quark\nconfinement model by taking into account, for the first time, the structure of\nheavy meson vertex and the finite quark mass contribution in the heavy quark\npropagators. The results are in quite good agreement with the experimental\ndata.",
        "category": "hep"
    },
    {
        "text": "Supersymmetric Model of Radiative Seesaw Majorana Neutrino Masses: The radiative seesaw mechanism proposed recently is minimally extended to\ninclude supersymmetry in a specific model. Relevant related issues such as\nleptogenesis and dark matter are discussed.",
        "category": "hep"
    },
    {
        "text": "Search for $CP$ violation using $T$-odd correlations in $D^0 \\to\n  K^+K^-\u03c0^+\u03c0^-$ decays: A search for $CP$ violation using $T$-odd correlations is performed using the\nfour-body $D^0 \\to K^+K^-\\pi^+\\pi^-$ decay, selected from semileptonic $B$\ndecays. The data sample corresponds to integrated luminosities of\n$1.0\\,\\text{fb}^{-1}$ and $2.0\\,\\text{fb}^{-1}$ recorded at the centre-of-mass\nenergies of 7 TeV and 8 TeV, respectively. The $CP$-violating asymmetry\n$a_{CP}^{T\\text{-odd}}$ is measured to be $(0.18\\pm 0.29\\text{(stat)}\\pm\n0.04\\text{(syst)})\\%$. Searches for $CP$ violation in different regions of\nphase space of the four-body decay, and as a function of the $D^0$ decay time,\nare also presented. No significant deviation from the $CP$ conservation\nhypothesis is found.",
        "category": "hep"
    },
    {
        "text": "Search for an invisible $Z^\\prime$ in a final state with two muons and\n  missing energy at Belle II: The $L_{\\mu}-L_{\\tau}$ extension of the standard model predicts the existence\nof a lepton-flavor-universality-violating $Z^{\\prime}$ boson that couples only\nto the heavier lepton families. We search for such a $Z^\\prime$ through its\ninvisible decay in the process $e^+ e^- \\to \\mu^+ \\mu^- Z^{\\prime}$. We use a\nsample of electron-positron collisions at a center-of-mass energy of 10.58GeV\ncollected by the Belle II experiment in 2019-2020, corresponding to an\nintegrated luminosity of 79.7fb$^{-1}$. We find no excess over the expected\nstandard-model background. We set 90$\\%$-confidence-level upper limits on the\ncross section for this process as well as on the coupling of the model, which\nranges from $3 \\times 10^{-3}$ at low $Z^{\\prime}$ masses to 1 at $Z^{\\prime}$\nmasses of 8$GeV/c^{2}$.",
        "category": "hep"
    },
    {
        "text": "On Schr\u00f6dinger superalgebras: We construct, using the supersymplectic framework of Berezin, Kostant and\nothers, two types of supersymmetric extensions of the Schr\\\"odinger algebra\n(itself a conformal extension of the Galilei algebra). An `$I$-type' extension\nexists in any space dimension, and for any pair of integers $N_+$ and $N_-$. It\nyields an $N=N_++N_-$ superalgebra, which generalizes the N=1 supersymmetry\nGauntlett et al. found for a free spin-$\\half$ particle, as well as the N=2\nsupersymmetry of the fermionic oscillator found by Beckers et al. In two space\ndimensions, new, `exotic' or `$IJ$-type' extensions arise for each pair of\nintegers $\\nu_+$ and $\\nu_-$, yielding an $N=2(\\nu_++\\nu_-)$ superalgebra of\nthe type discovered recently by Leblanc et al. in non relativistic Chern-Simons\ntheory. For the magnetic monopole the symmetry reduces to\n$\\o(3)\\times\\osp(1/1)$, and for the magnetic vortex it reduces to\n$\\o(2)\\times\\osp(1/2)$.",
        "category": "hep"
    },
    {
        "text": "Unravelling Medium Effects in Heavy Ion Collisions with Zeal: We propose a new observable, called zeal, to analyze events with jets in\nheavy ion collisions. The observable measures how a thermal medium affects the\nmultiplicity and distribution of energetic particles in a jet. Using few known\nmodels for energy loss and jet quenching, we demonstrate its capability to\ndistinguish the physics of these models.",
        "category": "hep"
    },
    {
        "text": "Limits on muon-neutrino to tau-neutrino oscillations induced by a\n  sterile neutrino state obtained by OPERA at the CNGS beam: The OPERA experiment, exposed to the CERN to Gran Sasso $\\nu_\\mu$ beam,\ncollected data from 2008 to 2012. Four oscillated $\\nu_\\tau$ Charged Current\ninteraction candidates have been detected in appearance mode, which are\nconsistent with $\\nu_\\mu \\to \\nu_\\tau$ oscillations at the atmospheric $\\Delta\nm^2$ within the \"standard\" three-neutrino framework. In this paper, the OPERA\n$\\nu_\\tau$ appearance results are used to derive limits on the mixing\nparameters of a massive sterile neutrino.",
        "category": "hep"
    },
    {
        "text": "Hadronic decays of B_c mesons with flavor SU(3)_F symmetry: We study implications of a recent observation of non-leptonic $B^+_c\\to D^0\nK^+$ decay and a bound on $B^+_c\\to D^0 \\pi^+$ transition on CP-violating\nasymmetries in $B_c$ decays. In the U-spin symmetry limit, we derive a relation\nbetween the CP-asymmetries in the $B^+_c\\to D^0 K^+$ and $B^+_c\\to D^0 \\pi^+$\nchannels and the corresponding branching ratios. We also derive several\nrelations between non-leptonic $B_c$ decays into the final states with $D$\nmesons in the flavor $SU(3)_F$ limit. We point out that a combined study of\n$SU(3)_F$ amplitudes in these decays can be used to constrain the angle\n$\\gamma$ of the Cabibbo-Kobayashi-Maskawa (CKM) matrix.",
        "category": "hep"
    },
    {
        "text": "Multigrid Monte Carlo with higher cycles in the Sine Gordon model: We study the dynamical critical behavior of multigrid Monte Carlo for the two\ndimensional Sine Gordon model on lattices up to 128 x 128. Using piecewise\nconstant interpolation, we perform a W-cycle (gamma=2). We examine whether one\ncan reduce critical slowing down caused by decreasing acceptance rates on large\nblocks by doing more work on coarser lattices. To this end, we choose a higher\ncycle with gamma = 4. The results clearly demonstrate that critical slowing\ndown is not reduced in either case.",
        "category": "hep"
    },
    {
        "text": "Vacuum energy and trace anomaly: Concerning the trace anomaly in field theory a nonvanishing vacuum energy\nbreaks the scale symmetry as well, in addition to the usual beta function\ndependent term, requiring a unit operator in the trace anomaly. This additional\nterm is also necessary in quantum chromodynamics (QCD) to cancel the inherent\nambiguity in the gluon condensate. The inseparability of the gluon condensate\neffect from the perturbative contribution to the vacuum energy renders it\nimpossible to isolate the gluon condensate effect on the cosmological constant.",
        "category": "hep"
    },
    {
        "text": "Glueballs in Radiative $J/\u03c8$ Decays: The scalar glueball is observed in a coupled-channel analysis of the $S$-wave\namplitude from BESIII data on radiative $J/\\psi$ decays and further data. Ten\nscalar isoscalar resonances were required to fit the data. Five of them were\ninterpreted as mainly-singlet, five as mainly-octet resonances in SU(3). The\nyield of resonances showed a striking peak with properties expected from a\nscalar glueball. The $D$ wave amplitude in the BESIII data on radiative\n$J/\\psi$ decays reveales a high-mass structure which can be described by a\nsingle Breit-Wigner or by the sum of three $\\phi\\phi$ resonances interpreted as\ntensor glueballs a long time ago. The structure - and further tensor resonances\nobserved in radiative $J/\\psi$ decays - are tentatively interpreted as tensor\nglueball. In $J/\\psi$ decays into $\\gamma\\pi^0\\pi^0\\eta'$ several resonances\nare reported. The possibility is discussed that the pseudoscalar glueball might\nbe hidden in these data.",
        "category": "hep"
    },
    {
        "text": "4-d Chern-Simons Theory: Higher Gauge Symmetry and Holographic Aspects: We present and study a 4d Chern-Simons (CS) model whose gauge symmetry is\nencoded in a balanced Lie group crossed module. Using the derived formal set-up\nrecently found, the model can be formulated in a way that in many respects\nclosely parallels that of the familiar 3d CS one. In spite of these formal\nresemblance, the gauge invariance properties of the 4d CS model differ\nconsiderably. The 4d CS action is fully gauge invariant if the underlying base\n4fold has no boundary. When it does, the action is gauge variant, the gauge\nvariation being a boundary term. If certain boundary conditions are imposed on\nthe gauge fields and gauge transformations, level quantization can then occur.\nIn the canonical formulation of the theory, it is found that, depending again\non boundary conditions, the 4d CS model is characterized by surface charges\nobeying a non trivial Poisson bracket algebra. This is a higher counterpart of\nthe familiar WZNW current algebra arising in the 3d model. 4d CS theory thus\nexhibits rich holographic properties. The covariant Schroedinger quantization\nof the 4d CS model is performed. A preliminary analysis of 4d CS edge field\ntheory is also provided. The toric and Abelian projected models are described\nin some detail.",
        "category": "hep"
    },
    {
        "text": "Influence of intense laser fields on measurable quantities in\n  $W^{-}$-boson decay: In principle, this paper suggests powerful laser technology as a promising\ninstrument that can be experimentally useful to control the lifetime and\nbranching ratio for an unstable particle decay. In a recent paper\n[arXiv:2101.00224], we calculated theoretically the $W^{-}$-boson leptonic\ndecay $(W^{-}\\rightarrow \\ell^{-} \\bar{\\nu}_{\\ell})$ in the presence of a\ncircularly polarized laser and we showed that the laser significantly\ncontributed to the diminution of the leptonic decay rate. In this paper, as a\ncontinuation of the previous one, we mainly deal with the theoretical\ncalculation of the $W^{-}$-boson hadronic decay $(W^{-}\\rightarrow q \\bar{q}')$\nand we combine the analytical results obtained in both papers to examine the\neffect of an intense laser, in terms of its field strength and frequency, on\nthe three measurable quantities in $W^{-}$-boson decay (total decay rate,\nlifetime and branching ratios). It was found that the laser has notably\ncontributed to the reduction of the total decay rate leading to a longer\nlifetime. Most importantly, the two branching ratios (one for leptons and the\nother for hadrons) are affected (increased or decreased) by the presence of a\nstrong external electromagnetic field. Combined together, these two\ncomplementary works may provide an in-depth and comprehensive study that would\nbe useful for any experimental investigation in the future.",
        "category": "hep"
    },
    {
        "text": "Solving Renormalization Group Equations by Recursion Relations: Renormalization Group Equations in integro-differential form describing the\nevolution of cascades or resumming logarithmic scaling violations have been\nknown in quantum field theory for a long time. These equations have been\ntraditionally solved by turning to Mellin moments, since in this space they\nbecome algebraic. x-space solutions are less known, but special asymptotic\nexpansions exists which allow a fast numerical implementation of these\nequations. We illustrate how the equations can be solved using recursion\nrelations in the next-to-leading order approximation.",
        "category": "hep"
    },
    {
        "text": "On the effects at colliding mu-meson beams: Possible influence of the weak interaction on the $\\mu^+ + \\mu^- \\to \\mu^+ +\n\\mu^- $ scattering and the $\\mu^+ + \\mu^- \\to e^+ + e^- $ reaction, both\nthrough the neutral lepton currents and the charged ones (in the second order\non weak constant), are considered.\n  The calculations show that $P$ - odd effects in the mentioned processes would\nprove the existence of the neutral currents which, in their turn, give the\nprincipal basis for explanation of the mass difference of a muon and an\nelectron from the point of view of Ref. [1].",
        "category": "hep"
    },
    {
        "text": "Electroweak Symmetry Breaking without the $\u03bc^2$ Term: We demonstrate that from a low energy perspective a viable breaking of the\nelectroweak symmetry, as present in nature, can be achieved without the\n(negative sign) $\\mu^2$ mass term in the Higgs potential, thereby avoiding\ncompletely the appearance of relevant operators, featuring coefficients with a\npositive mass dimension, in the theory. We show that such a setup is self\nconsistent and not ruled out by Higgs physics. In particular, we point out that\nit is the lightness of the Higgs boson that allows for the electroweak symmetry\nto be broken dynamically via operators of $D\\geq 4$, consistent with the power\nexpansion. Beyond that, we entertain how this scenario might even be preferred\nphenomenologically compared to the ordinary mechanism of electroweak symmetry\nbreaking, as realized in the Standard Model, and argue that it can be fully\ntested at the LHC. In an appendix, we classify UV completions that could lead\nto such a setup, considering also the option of generating all scales\ndynamically.",
        "category": "hep"
    },
    {
        "text": "Systematically Testing Singlet Models for $(g-2)_\u03bc$: We comprehensively study all viable new-physics scenarios that resolve the\nmuon $(g-2)_\\mu$ anomaly with only Standard Model singlet particles coupled to\nmuons via renormalizable interactions. Since such models are only viable in the\nMeV -- TeV mass range and require sizable muon couplings, they predict abundant\naccelerator production through the same interaction that resolves the anomaly.\nWe find that a combination of fixed-target (NA64$\\mu$, $M^3$), $B$-factory\n(BABAR, Belle II), and collider (LHC, muon collider) searches can cover nearly\nall viable singlets scenarios, independently of their decay modes. In\nparticular, future muon collider searches offer the only certain test of\nsinglets above the GeV scale, covering all higher masses up to the TeV-scale\nunitarity limit for these models. Intriguingly, we find that\n$\\mathcal{O}(100~\\mathrm{GeV})$ muon colliders may yield better coverage for\nGeV-scale singlets compared to TeV-scale concepts, which has important\nimplications for the starting center-of-mass energy of a staged muon collider\nprogram.",
        "category": "hep"
    },
    {
        "text": "Unparticle Physics in Single Top Signals: We study the single production of top quarks in $e^+e^-, ep$ and $pp$\ncollisions in the context of unparticle physics through the Flavor Violating\n(FV) unparticle vertices and compute the total cross sections for single top\nproduction as functions of scale dimension $d_{\\U}$. We find that among all,\nLHC is the most promising facility to probe the unparticle physics via single\ntop quark production processes.",
        "category": "hep"
    },
    {
        "text": "Dipole factorization for DIS at NLO: Combining the $q\\bar{q}$ and\n  $q\\bar{q}g$ contributions: The NLO corrections to the DIS structure functions $F_2$ and $F_L$ (or\nequivalently the photon-target cross sections $\\sigma^{\\gamma^*}_{T}$ and\n$\\sigma^{\\gamma^*}_{L}$) at low $x_{Bj}$ are obtained, as a generalization of\nthe dipole factorization formula. For the first time, the contributions of both\nthe $q\\bar{q}$ and the $q\\bar{q}g$ Fock states in the photon are directly\ncalculated, using earlier results for the $q\\bar{q}$ light-front wave-functions\nat one loop inside a dressed virtual photon. Both the $q\\bar{q}$ and the\n$q\\bar{q}g$ contributions have UV divergences, which are shown to cancel each\nother, using conventional dimensional regularization as UV regulator. Finally,\nthe resummation of high-energy logarithms on top of the NLO results for\n$\\sigma^{\\gamma^*}_{T}$ and $\\sigma^{\\gamma^*}_{L}$ is discussed.",
        "category": "hep"
    },
    {
        "text": "Schwinger Mechanism for Fermion Pair Production in the Presence of\n  Arbitrary Time Dependent Background Electric Field: We study the Schwinger mechanism for the pair production of fermions in the\npresence of an arbitrary time-dependent background electric field E(t) by\ndirectly evaluating the path integral. We obtain an exact non-perturbative\nresult for the probability of fermion-antifermion pair production per unit time\nper unit volume per unit transverse momentum (of the fermion or antifermion)\nfrom the arbitrary time dependent electric field E(t) via Schwinger mechanism.\nWe find that the exact non-perturbative result is independent of all the time\nderivatives d^nE(t)/dt^n, where n=1,2,....\\infty. This result has the same\nfunctional dependence on E as the Schwinger's constant electric field E result\nwith the replacement: E -> E(t).",
        "category": "hep"
    },
    {
        "text": "Fitting high-energy Littlest Seesaw parameters using low-energy neutrino\n  data and leptogenesis: We show that the four high-energy Littlest Seesaw parameters in the flavour\nbasis,namely two real Yukawa couplings plus the two right-handed neutrino\nmasses, can be determined by an excellent fit to the seven currently\nconstrained observables of low-energy neutrino data and leptogenesis. Taking\ninto account renormalisation group corrections, we estimate $\\chi^2 \\simeq\n1.5-2.6$ for the three d.o.f., depending on the high-energy scale and the type\nof non supersymmetric Littlest Seesaw model. We extract allowed ranges of\nneutrino parameters from our fit data, including the approximate mu-tau\nsymmetric predictions $\\theta_{23}=45^o\\pm 1^o$ and $\\delta = -90^o \\pm 5^o $,\nwhich, together with a normal mass ordering with $m_1=0$, will enable Littlest\nSeesaw models to be tested in future neutrino experiments.",
        "category": "hep"
    },
    {
        "text": "Stability of the holographic description of the Universe: We investigate the stability of the holographic description of the universe.\nBy treating the perturbation globally, we discover that this description is\nstable, which is support for the holographic description of the universe.",
        "category": "hep"
    },
    {
        "text": "The Casimir-Aharonov-Bohm effect?: The combined effect of the magnetic field background in the form of a\nsingular vortex and the Dirichlet boundary condition at the location of the\nvortex on the vacuum of quantized scalar field is studied. We find the induced\nvacuum energy density and current to be periodic functions of the vortex flux\nand holomorphic functions of the space dimension.",
        "category": "hep"
    },
    {
        "text": "Towards the matrix model of M-theory on a lattice: The Wilson discretization of the dimensionally reduced supersymmetric\nYang-Mills theory is constructed. This gives a lattice version of the matrix\nmodel of M-theory. An SU(2) model is studied numerically in the quenched\napproximation for D=4. The system shows canonical scaling in the continuum\nlimit. A clear signal for a prototype of the \"black hole to strings\" phase\ntransition is found. The pseudocritical temperature is determined and the\ntemperature dependence of the total size of the system is measured in both\nphases. Further applications are outlined.",
        "category": "hep"
    },
    {
        "text": "$\u03b7\\to \u03c0^0 \u03b3\u03b3$ decay within a chiral unitary approach\n  revisited: In view of the recent experimental developments on the experimental side in\nthe $\\eta \\to \\pi^0 \\gamma \\gamma$ decay, and the fact that the Particle Data\nGroup in the on line edition of 2007 reports sizable changes of the radiative\ndecay widths of vector mesons used as input in the theoretical calculations of\n\\cite{eta}, a reevaluation of the decay width of the $\\eta$ in this channel has\nbeen done, reducing its uncertainty by almost a factor of two. The new input of\nthe PDG is used and invariant mass distributions and total widths are compared\nwith the most recent results from AGS, MAMI and preliminary ones of KLOE. The\nagreement of the theory with the AGS and MAMI data is very good, both for the\ntotal rates as well as for the invariant mass distributions of the two photons.",
        "category": "hep"
    },
    {
        "text": "BMN operators with a scalar fermion pair and operator mixing in N=4\n  Super Yang-Mills Theory: The mixings between BMN operators with two scalar impurities and those with a\nscalar fermion pair are discussed to the lowest order at planar level. For this\npurpose, matrix model effective vertices are calculated to O(g^3). All the\nmixing patterns are explicitly obtained.",
        "category": "hep"
    },
    {
        "text": "Phenomenological aspects of nonstandard supersymmetry breaking terms: In realistic supersymmetric models, very small hard supersymmetry breaking\nterms generally appear. Some of them violate baryon and/or lepton number. We\ndiscuss their possible applications to proton decay and generation of neutrino\nmasses.",
        "category": "hep"
    },
    {
        "text": "Parity and Front-Form Quantization of Field Theories: Recently, we proposed a new front-form quantization which treated both the\n$x^{+}$ and the $x^{-}$ coordinates as front-form 'times.' This quantization\nwas found to preserve parity explicitly. In this paper we extend this\nconstruction to fermion fields in the context of the Yukawa theory. We quantize\nthis theory using a method proposed originally by Faddeev and Jackiw . We find\nthat $P^-$ {\\it and} $P^+$ become dynamical and that the theory is manifestly\ninvariant under parity.",
        "category": "hep"
    },
    {
        "text": "Effects of the next-to-leading order terms in the chiral SU(3)\n  Lagrangian on the strangeness -1 s-wave meson-baryon interactions: The meson-baryon interactions in s-wave in the strangeness S=-1 sector are\nstudied using a chiral unitarity approach based on the next-to-leading order\nchiral SU(3) Lagrangian. The model is fitted to the large set of experimental\ndata in different two-body channels. Particular attention is paid to the $\\Xi$\nhyperon production reaction, $\\bar{K} N \\rightarrow K \\Xi$, where the effect of\nthe next-to-leading order terms in the Lagrangian play a crucial role, since\nthe cross section of this reaction at tree level is zero.",
        "category": "hep"
    },
    {
        "text": "Quantum Braided Poincar\u00c9 Group: A new deformation of the of the Poincar\\'e group and of the Minkowski\nspace-time is given. From the mathematical point of view this deformation is\nrather quantum-braided group. Global and local structure of this\nquantum-braided Poincar\\'e group is investigated. A kind of ``quantum metrics''\nis introduced in the $q$-Minkowski space.",
        "category": "hep"
    },
    {
        "text": "A substrate for brane shells from $T\\bar{T}$: A solvable current-current deformation of the worldsheet theory of strings on\n$AdS_3$ has been recently conjectured to be dual to an irrelevant deformation\nof the spacetime orbifold CFT, commonly referred to as single-trace $T\\bar{T}$.\nThese deformations give rise to a family of bulk geometries which realize a\nnon-trivial flow towards the UV. For a particular sign of this deformation, the\ncorresponding three-dimensional geometry approaches $AdS_3$ in the interior,\nbut has a curvature singularity at finite radius, beyond which there are closed\ntimelike curves. It has been suggested that this singularity is due to the\npresence of \"negative branes,\" which are exotic objects that generically change\nthe metric signature. We propose an alternative UV-completion for these\ngeometries by cutting and gluing to a regular background which approaches a\nlinear dilaton vacuum in the UV. In the S-dual picture, a singularity\nresolution mechanism known as the enhan\\c{c}on induces this transition by the\nformation of a shell of $D5$-branes at a fixed radial position near the\nsingularity. The solutions involving negative branes gain a new interpretation\nin this context.",
        "category": "hep"
    },
    {
        "text": "Collider Signatures of Sneutrino Cold Dark Matter: Decays of sneutrinos are considered in the case that in the presence of\nlepton-number violation in the sneutrino sector the lighter tau-sneutrino is\nthe Lightest Supersymmetric Particle and the Cold Dark Matter in the Universe.\nIn such circumstances the signals from sparticle decays differ considerably\nfrom the ``standard'' case where the lightest neutralino is the Lightest\nSupersymmetric Particle and it is found that in a wide range of parameters\ncompatible with the sneutrino Cold Dark Matter hypothesis signatures\ncharacteristic for such a scenario should be easily observable at for example a\nNext Linear Collider.",
        "category": "hep"
    },
    {
        "text": "Probing Top Changing Neutral Higgs Couplings at Colliders: The $h(125)$ boson, discovered only in 2012, is lower than the top quark in\nmass, hence $t \\to ch$ search commenced immediately thereafter, with current\nlimits at the per mille level and improving. As the $t \\to ch$ rate vanishes\nwith the $h$-$H$ mixing angle $\\cos\\gamma \\to 0$, we briefly review the\ncollider probes of the top changing $tcH/tcA$ coupling $\\rho_{tc}$ of the\nexotic $CP$-even/odd Higgs bosons $H/A$. Together with an extra top conserving\n$ttH/ttA$ coupling $\\rho_{tt}$, one has an enhanced $cbH^+$ coupling alongside\nthe familiar $tbH^+$ coupling, where $H^+$ is the charged Higgs boson. The main\nprocesses we advocate are $cg \\to tH/A \\to tt\\bar c,\\; tt\\bar t$ (same-sign top\nand triple-top), and $cg \\to bH^+ \\to bt\\bar b$. We also discuss some related\nprocesses such as $cg \\to thh$, $tZH$ that depend on $\\cos\\gamma$ being\nnonzero, comment briefly on $gg \\to H/A \\to t\\bar t, t\\bar c$ resonant\nproduction, and touch upon the $\\rho_{tu}$ coupling.",
        "category": "hep"
    },
    {
        "text": "Holographic Entanglement Entropy of Mass-deformed ABJM Theory: We investigate the effect of supersymmetry preserving mass deformation near\nthe UV fixed point represented by the ${\\cal N}=6$ ABJM theory. In the context\nof the gauge/gravity duality, we analytically calculate the leading small mass\neffect on the renormalized entanglement entropy (REE) for the most general\nLin-Lunin-Maldacena (LLM) geometries in the cases of the strip and disk shaped\nentangling surfaces. Our result shows that the properties of the REE in\n(2+1)-dimensions are consistent with those of the $c$-function in\n(1+1)-dimensions. We also discuss the validity of our computations in terms of\nthe curvature behavior of the LLM geometry in the large $N$ limit and the\nrelation between the correlation length and the mass parameter for a special\nLLM solution.",
        "category": "hep"
    },
    {
        "text": "The lift of type IIA supergravity with D6 sources: M-theory with torsion: This paper is concerned with an extension of the well known Kaluza-Klein\nmechanism. As the standard ansatz for Kaluza-Klein reduction implies the\nexistence of a gauge potential associated with the KK field strength, it\nfollows immediately that this field strength satisfies its Bianchi identity.\nHence, the standard KK formalism breaks down in the presence of a violated\nBianchi identity. This occurs for example in the context of D6 sources.\n  We will investigate and partially solve this problem in the context of the\ntype IIA/M-theory duality. Our discussion is motivated by the construction of\ngauge/string duals with backreacting flavor branes using D6-branes, which\nappear in M-theory as KK-monopoles. We are able to derive source-modified\nequations of motion for the eleven-dimensional theory, and are subsequently\nable to obtain the source-modified type IIA equations by direct dimensional\nreduction.",
        "category": "hep"
    },
    {
        "text": "Study of the structure of e+e- -> b bbar g events and improved limits on\n  the anomalous chromomagnetic coupling of the b-quark: The structure of e+e- -> bbg events was studied using Z0 decays recorded in\nthe SLD experiment at SLAC. Three-jet final states were selected and the\nCCD-based vertex detector was used to identify two of the jets as b or bbar.\nDistributions of the gluon energy and polar angle were measured over the full\nkinematic range, and compared with perturbative QCD predictions. The energy\ndistribution is potentially sensitive to an anomalous b chromomagnetic moment\nkappa. We measured kappa to be consistent with zero and set limits on its\nvalue, -0.11 < kappa < 0.08 at 95% c.l. (preliminary).",
        "category": "hep"
    },
    {
        "text": "Charged lepton Flavor Violation in Supersymmetry with Bilinear R-Parity\n  Violation: The simplest unified extension of the Minimal Supersymmetric Standard Model\nwith bi-linear R-parity violation naturally predicts a hierarchical neutrino\nmass spectrum, suitable to explain atmospheric and solar neutrino fluxes. We\nstudy whether the individual violation of the lepton numbers L_{e,mu,tau} in\nthe charged sector can lead to measurable rates for BR(mu->e gamma)and\n$BR(tau-> mu gamma). We find that some of the R-parity violating terms that are\ncompatible with the observed atmospheric neutrino oscillations could lead to\nrates for mu->e gamma measurable in projected experiments. However, the Delta\nm^2_{12} obtained for those parameters is too high to be compatible with the\nsolar neutrino data, excluding therefore the possibility of having measurable\nrates for mu->e gamma in the model.",
        "category": "hep"
    },
    {
        "text": "Algebraic structure of gravity in Ashtekar variables: The BRST transformations for gravity in Ashtekar variables are obtained by\nusing the Maurer-Cartan horizontality conditions. The BRST cohomology in\nAshtekar variables is calculated with the help of an operator $\\delta$\nintroduced by S.P. Sorella, which allows to decompose the exterior derivative\nas a BRST commutator. This BRST cohomology leads to the differential invariants\nfor four-dimensional manifolds.",
        "category": "hep"
    },
    {
        "text": "Gauge Independence of the Lagrangian Path Integral in a Higher-Order\n  Formalism: We propose a Lagrangian path integral based on gauge symmetries generated by\na symmetric higher-order $\\Delta$-operator, and demonstrate that this path\nintegral is independent of the chosen gauge-fixing function. No explicit change\nof variables in the functional integral is required to show this.",
        "category": "hep"
    },
    {
        "text": "Higgs Production in Association with a Dark-Z at Future Electron\n  Positron Colliders: In recent years there have been many proposals for new electron-positron\ncolliders, such as the Circular Electron-Positron Collider, the International\nLinear Collider, and the Future Circular Collider in electron-positron mode.\nMuch of the motivation for these colliders is precision measurements of the\nHiggs boson and searches for new electroweak states. Hence, many of these\nstudies are focused on energies above the $h\\,Z$ threshold. However, there are\nproposals to run these colliders at the lower $WW$ threshold and $Z$-pole\nenergies. In this paper, we propose a new search for Higgs physics accessible\nat lower energies: $e^+e^-\\rightarrow h\\,Z_d$, where $Z_d$ is a new light gauge\nboson such as a dark photon or dark-$Z$. Such searches can be conducted at the\n$WW$ threshold, i.e. energies below the $h\\,Z$ threshold where exotic Higgs\ndecays can be searched for in earnest. Additionally, due to very good angular\nand energy resolution at future electron-positron colliders, these searches\nwill be sensitive to $Z_d$ masses below 1 GeV, which is lower than the current\ndirect LHC searches. We will show that at $\\sqrt{s}=160$ GeV with 10 ab$^{-1}$,\na search for $e^+e^-\\rightarrow h\\,Z_d$ is sensitive to $h-Z-Z_d$ couplings of\n$\\delta\\sim 8\\times 10^{-3}$ and cross sections of $\\sim 1-2$ ab for $Z_d$\nmasses below 1 GeV. The results are similar at $\\sqrt{s}=240$ GeV with 5\nab$^{-1}$.",
        "category": "hep"
    },
    {
        "text": "Critical flavour number of the Thirring model in three dimensions: The Thirring model is a four fermion theory with vector interaction. We study\nit in three dimensions, where it is closely related to QED and other models\nused to describe properties of graphene. In addition it is a good toy model to\nstudy chiral symmetry breaking, since a phase with broken chiral symmetry is\npresent for the model with one fermion flavour. On the other hand, there is no\nsuch phase in the limit of infinitely many fermion flavours. Thus, a transition\nat some critical flavour number Nfc is expected, where the broken phase\nvanishes. The model was already studied with different methods, including\nSchwinger-Dyson, functional renormalization group and lattice approaches. Most\nstudies agree that there is indeed a phase transition from a chirally symmetric\nphase to a spontaneously broken phase for a small number of fermion flavours.\nBut there is no agreement on the critical flavour number and further details of\nthe critical behaviour. Values of Nfc found in the literature usually range\nbetween 2 and 7. All earlier lattice studies were performed with staggered\nfermions, where it is questionable if the continuum limit of the lattice model\nhas the same chiral symmetry as the continuum model. We present an approach for\nsimulations of the Thirring model with SLAC fermions. With this choice, we can\nbe sure to implement the full chiral symmetry of the continuum model. First\nresults from simulations are shown but do not allow a reliable estimate of Nfc\nso far.",
        "category": "hep"
    },
    {
        "text": "Bosonic Seesaw in the Unparticle Physics: Recently, conceptually new physics beyond the Standard Model has been\nproposed by Georgi, where a new physics sector becomes conformal and provides\n\"unparticle\" which couples to the Standard Model sector through higher\ndimensional operators in low energy effective theory. Among several\npossibilities, we focus on operators involving the (scalar) unparticle, Higgs\nand the gauge bosons. Once the Higgs develops the vacuum expectation value\n(VEV), the conformal symmetry is broken and as a result, the mixing between the\nunparticle and the Higgs boson emerges. In this paper, we consider a natural\nrealization of bosonic seesaw in the context of unparticle physics. In this\nframework, the negative mass squared or the electroweak symmetry breaking\nvacuum is achieved as a result of mass matrix diagonalization. In the\ndiagonalization process, it is important to have zero value in the\n(1,1)-element of the mass matrix. In fact, the conformal invariance in the\nhidden sector can actually assure the zero of that element. So, the bosonic\nseesaw mechanism for the electroweak symmetry breaking can naturally be\nunderstood in the framework of unparticle physics.",
        "category": "hep"
    },
    {
        "text": "Reactor-based Neutrino Oscillation Experiments: The status of neutrino oscillation searches employing nuclear reactors as\nsources is reviewed. This technique, a direct continuation of the experiments\nthat proved the existence of neutrinos, is today an essential tool in\ninvestigating the indications of oscillations found in studying neutrinos\nproduced in the sun and in the earth's atmosphere. The low-energy of the\nreactor \\nuebar makes them an ideal tool to explore oscillations with small\nmass differences and relatively large mixing angles.\n  In the last several years the determination of the reactor anti-neutrino flux\nand spectrum has reached a high degree of accuracy. Hence measurements of these\nquantities at a given distance L can be readily compared with the expectation\nat L = 0, thus testing \\nuebar disappearance.\n  While two experiments, Chooz and Palo Verde, with baselines of about 1 km and\nthus sensitive to the neutrino mass differences associated with the atmospheric\nneutrino anomaly, have collected data and published results recently, an\nambitious project with a baseline of more than 100 km, Kamland, is preparing to\ntake data. This ultimate reactor experiment will have a sensitivity sufficient\nto explore part of the oscillation phase space relevant to solar neutrino\nscenarios. It is the only envisioned experiment with a terrestrial source of\nneutrinos capable of addressing the solar neutrino puzzle.",
        "category": "hep"
    },
    {
        "text": "Kinks in higher derivative scalar field theory: We study static kink configurations in a type of two-dimensional higher\nderivative scalar field theory whose Lagrangian contains second-order\nderivative terms of the field. The linear fluctuation around arbitrary static\nkink solutions is analyzed. We find that, the linear spectrum can be described\nby a supersymmetric quantum mechanics problem, and the criteria for stable\nstatic solutions can be given analytically. We also construct a superpotential\nformalism for finding analytical static kink solutions. Using this formalism we\nfirst reproduce some existed solutions and then offer a new solution. The\nproperties of our solution is studied and compared without those preexisted. We\nalso show the possibility in constructing twinlike model in the higher\nderivative theory, and give the consistency conditions for twinlike models\ncorresponding to the canonical scalar field theory.",
        "category": "hep"
    },
    {
        "text": "Exploiting stellar explosion induced by the QCD phase transition in\n  large-scale neutrino detectors: The centers of the core-collapse supernovae are one of the densest\nenvironments in the Universe. Under such conditions, it is conceivable that a\nfirst-order phase transition from ordinary nuclear matter to the quark-gluon\nplasma occurs. This transition releases a large amount of latent heat that can\ndrive a supernova explosion and may imprint a sharp signature in the neutrino\nsignal. We show how this snap feature, if observed at large-scale neutrino\ndetectors, can set competitive limits on the neutrino masses and assist the\nlocalization of the supernova via triangulation. The 95\\%C.L. limit on the\nneutrino mass can reach 0.16~eV in Ice-Cube, 0.22~eV in Hyper-Kamiokande, and\n0.58~eV in DUNE, for a supernova at a distance of 10 kpc. For the same distance\nand in the most optimistic neutrino conversion case, the triangulation method\ncan constrain the $1\\sigma$ angular uncertainty of the supernova localization\nwithin $\\sim 0.3^{\\circ}-9.0^{\\circ}$ in the considered pairs of the detectors,\nleading to an improvement up to an order of magnitude with respect to the often\nconsidered in the literature rise time of the neutronization burst.",
        "category": "hep"
    },
    {
        "text": "The phase structure and effective action of 3D CDT at higher spatial\n  genus: We perform a detailed investigation of the phase structure and the\nsemiclassical effective action of (2+1)-dimensional Causal Dynamical\nTriangulations (CDT) quantum gravity using computer simulations. On the one\nhand, we study the effect of enlarging the ensemble of triangulations by\nrelaxing the simplicial manifold conditions in a controlled way. On the other\nhand, we cast a first look at CDT geometries with spatial topology beyond that\nof the sphere or torus. We measure the phase structure of the model for several\ntriangulation ensembles and spatial topologies, finding evidence that the phase\nstructure is qualitatively unaffected by these generalizations. Furthermore, we\ndetermine the effective action for the spatial volumes of the system, again\nvarying the simplicial manifold conditions and the spatial topology. In all\ncases where we were able to gather sufficient statistics, we found the\nresulting effective action to be consistent with a minisuperspace action\nderived from continuum Einstein gravity. We interpret our overall results as\nevidence that 1) partially relaxing simplicial manifold conditions or changing\nthe spatial genus does not affect the continuum limit of 3D CDT and that 2)\nincreasing the spatial genus of the system likely does not influence the\nleading-order terms in the emergent effective action.",
        "category": "hep"
    },
    {
        "text": "Jet Function with a Jet Algorithm in SCET: The jet function for the factorized cross section $e^+e^-$ into dijets is\ngiven as a function of the jet invariant mass s and with a generic jet\nalgorithm at $\\mathcal{O}(\\alpha_s)$. We demonstrate the results using the\nSterman-Weinberg algorithm and show that the jet function is independent of the\nenergy fraction $\\beta$ of the soft radiation. The anomalous dimension has the\nsame form with and without the cone half-angle $\\delta$. The dependence of the\nfinite part of the jet function on the cone angle is given.",
        "category": "hep"
    },
    {
        "text": "Casimir effect for fermion condensate in conical rings: The fermion condensate (FC) is investigated for a (2+1)-dimensional massive\nfermionic field confined on a truncated cone with an arbitrary planar angle\ndeficit and threaded by a magnetic flux. Different combinations of the boundary\nconditions are imposed on the edges of the cone. They include the bag boundary\ncondition as a special case. By using the generalized Abel-Plana-type summation\nformula for the series over the eigenvalues of the radial quantum number, the\nedge-induced contributions in the FC are explicitly extracted. The FC is an\neven periodic function of the magnetic flux with the period equal to the flux\nquantum. Depending on the boundary conditions, the condensate can be either\npositive or negative. For a massless field the FC in the boundary-free conical\ngeometry vanishes and the nonzero contributions are purely edge-induced\neffects. This provides a mechanism for time-reversal symmetry breaking in the\nabsence of magnetic fields. Combining the results for the fields corresponding\nto two inequivalent irreducible representations of the Clifford algebra, the FC\nis investigated in the parity and time-reversal symmetric fermionic models and\napplications are discussed for graphitic cones.",
        "category": "hep"
    },
    {
        "text": "On Cosmological Perturbations on a Brane in an Anti-de Sitter Bulk: In this paper, we consider cosmological perturbations on a brane universe\nembedded in an Anti-de Sitter bulk. We use a novel gauge, in which the full\nfive-dimensional problem is in principle solvable. In this gauge we derive the\nequations for scalar, vector and tensor perturbations. These equations are\nnecessary in order to calculate microwave background anisotropies in this\nparticular scenario. Throughout the paper, we draw attention to the influence\nof the bulk gravitons, which act as a source for the perturbations on the\nbrane. In addition, we find that isocurvature modes are generated due to the\ninfluence of bulk gravitons.",
        "category": "hep"
    },
    {
        "text": "On T-duality transformations for the three-sphere: We study collective T-duality transformations along one, two and three\ndirections of isometry for the three-sphere with H-flux. Our aim is to obtain\nnew non-geometric backgrounds along lines similar to the example of the\nthree-torus. However, the resulting backgrounds turn out to be geometric in\nnature. To perform the duality transformations, we develop a novel procedure\nfor non-abelian T-duality, which follows a route different compared to the\nknown literature, and which highlights the underlying structure from an\nalternative point of view.",
        "category": "hep"
    },
    {
        "text": "S-duality wall of SQCD from Toda braiding: Exact field theory dualities can be implemented by duality domain walls such\nthat passing any operator through the interface maps it to the dual operator.\nThis paper describes the S-duality wall of four-dimensional ${\\cal N}=2$ SU(N)\nSQCD with 2N hypermultiplets in terms of fields on the defect, namely\nthree-dimensional ${\\cal N}=2$ SQCD with gauge group U(N-1) and 2N flavours,\nwith a monopole superpotential. The theory is self-dual under a duality found\nby Benini, Benvenuti and Pasquetti, in the same way that T[SU(N)] (the\nS-duality wall of ${\\cal N}=4$ super Yang-Mills) is self-mirror. The\ndomain-wall theory can also be realized as a limit of a USp(2N-2) gauge theory;\nit reduces to known results for N=2. The theory is found through the AGT\ncorrespondence by determining the braiding kernel of two semi-degenerate vertex\noperators in Toda CFT.",
        "category": "hep"
    },
    {
        "text": "$\\bar{K}NN$ Absorption within the Framework of the Fixed Center\n  Approximation to Faddeev equations: We present a method to evaluate the $\\bar{K}$ absorption width in the bound\n$\\bar{K}NN$ system. Most calculations of this system ignore this channel and\nonly consider the $\\bar{K}N \\rightarrow \\pi \\Sigma$ conversion. Other works\nmake a qualitative calculation using perturbative methods. Since the $\n\\Lambda(1405) $ resonance is playing a role in the process, the same resonance\nis changed by the presence of the absorption channels and we find that a full\nnonperturbative calculation is called for, which we present here. We employ the\nFixed Center Approximation to Faddeev equations to account for $\\bar{K}$\nrescattering on the $ (NN) $ cluster and we find that the width of the states\nfound previously for $ S=0 $ and $ S=1 $ increases by about 30 MeV due to the\n$\\bar{K}NN$ absorption, to a total width of about 80 MeV.",
        "category": "hep"
    },
    {
        "text": "Effects of a strong magnetic field on the QCD flux tube: In this work we investigate the effect of an external magnetic field B on the\nshape of flux tubes in QCD by means of lattice simulations, performed with\nN_f=2+1 flavors of stout improved dynamical staggered quarks with physical\nmasses. After having discussed some difficulties in the practical definition of\nthe flux tube at B=0, we show that these ambiguities do not affect the\ndetermination of the flux tube modifications induced by the magnetic field.\nDifferent results are obtained depending on the relative orientations of the\nflux tube and of the magnetic field: they confirm that the magnetic field acts\nas transverse confinement catalyser and longitudinal confinement inhibitor;\nmoreover, the flux tube itself loses its axial symmetry when it is not directed\nalong the magnetic background.",
        "category": "hep"
    },
    {
        "text": "W-Geometries: It is shown that, classically, the W-algebras are directly related to the\nextrinsic geometry of the embedding of two-dimensional manifolds with chiral\nparametrisation (W-surfaces) into higher dimensional K\\\"ahler manifolds. We\nstudy the local and the global geometries of such embeddings, and connect them\nto Toda equations. The additional variables of the related KP hierarchy are\nshown to yield a specific coordinate system of the target-manifold, and this\nallows us to prove that W-transformations are simply particular diffeomorphisms\nof this target space. The W-surfaces are shown to be instantons of the\ncorresponding non-linear $\\sigma$-models.",
        "category": "hep"
    },
    {
        "text": "N=4, d=1 Supersymmetric Hyper-Kaehler Sigma Models and Non-Abelian\n  Monopole Background: We construct a Lagrangian formulation of \\Nf supersymmetric mechanics with\nhyper-K\\\"{a}hler sigma models in a bosonic sector in the non-Abelian background\ngauge field. The resulting action includes a wide class of \\Nf supersymmetric\nmechanics describing the motion of an isospin-carrying particle over spaces\nwith non-trivial geometry. In two examples we discuss in details, the\nbackground fields are identified with the field of BPST instantons in the flat\nand Taub-NUT spaces.",
        "category": "hep"
    },
    {
        "text": "Minicharged Particles at Accelerators: Progress and Prospects: Minicharged particles (mCPs), hypothetical free particles with tiny electric\ncharges below the elementary charge, $e$, offer a valuable probe of dark\nsectors and fundamental physics through several clear experimental signatures.\nVarious models of physics beyond the Standard Model predict the existence of\nsuch particles, which could help elucidate the ongoing mysteries regarding\nelectric charge quantization and the nature of dark matter. Moreover, a\nhypothetical scenario involving a small minicharged subcomponent of dark matter\nhas recently been demonstrated as a viable explanation of the anomaly in the 21\ncm hydrogen absorption signal reported by the EDGES collaboration. Although\nseveral decades of indirect observations and direct experimental searches for\nmCPs at particle accelerators have led to severe constraints, a substantial\nwindow of the mCP mass$\\unicode{x2013}$mixing parameter space remains\nunexplored at the energy frontier accessible to current state-of-the-art\naccelerators, such as the Large Hadron Collider (LHC). Consequently, mCPs have\nremained topical over the years, and new experimental searches at accelerators\nhave been gaining interest. In this article, we review the theoretical\nframeworks in which mCPs emerge and their phenomenological implications, the\ncurrent direct and indirect constraints on mCPs, and the present state of the\nongoing and upcoming searches for mCPs at particle accelerators. Additionally,\nwe present the results of an updated study of the projected sensitivity of the\nrecently approved (and relocated) Phase-1 detector of the MoEDAL's Apparatus\nfor Penetrating Particles (MAPP) experiment to Drell$\\unicode{x2013}$Yan\npair-produced mCPs at the LHC's Run 3 and the future High-Luminosity LHC.",
        "category": "hep"
    },
    {
        "text": "Gravitational Correction to Running of Gauge Couplings: We calculate the contribution of graviton exchange to the running of gauge\ncouplings at lowest non-trivial order in perturbation theory. Including this\ncontribution in a theory that features coupling constant unification does not\nupset this unification, but rather shifts the unification scale. When\nextrapolated formally, the gravitational correction renders all gauge couplings\nasymptotically free.",
        "category": "hep"
    },
    {
        "text": "Production of Z'-Boson Resonances with Large Width at the LHC: Di-lepton searches for Beyond the Standard Model (BSM) Z' bosons that rely on\nthe analysis of the Breit-Wigner (BW) line shape are appropriate in the case of\nnarrow resonances, but likely not sufficient in scenarios featuring Z' states\nwith large widths. Conversely, alternative experimental strategies applicable\nto wide Z' resonances are much more dependent than the default bump search\nanalyses on the modelling of QCD higher-order corrections to the production\nprocesses, for both signal and background. For heavy Z' boson searches in the\ndi-lepton channel at the CERN Large Hadron Collider (LHC), the transverse\nmomentum q_T of the di-lepton system peaks at q_T \\ltap 10^{-2} M_{ll}, where\nM_{ll} is the di-lepton invariant mass. We exploit this to treat the QCD\ncorrections by using the logarithmic resummation methods in M_{ll} / q_T to all\norders in the strong coupling constant \\alpha_s. We carry out studies of Z'\nstates with large width at the LHC by employing the program {\\tt reSolve},\nwhich performs QCD transverse momentum resummation up to\nNext-to-Next-to-Leading Logarithmic (NNLL) accuracy. We consider two benchmark\nBSM scenarios, based on the Sequential Standard Model (SSM) and dubbed `SSM\nwide' and `SSM enhanced'. We present results for the shape and size of Z' boson\nsignals at the differential level, mapped in both cross section (\\sigma) and\nForward-Backward Asymmetry (A_{\\rm FB}), and perform numerical investigations\nof the experimental sensitivity at the LHC Run 3 and High-Luminosity LHC\n(HL-LHC).",
        "category": "hep"
    },
    {
        "text": "Interference Fragmentation Functions and Valence Quark Spin\n  Distributions in the Nucleon: We explore further applications of the twist-two quark interference\nfragmentation functions introduced earlier. We show that semi-inclusive\nproduction of two pions in the current fragmentation region in deep inelastic\nscattering of a longitudinally polarized electron on a longitudinally polarized\nnucleon can provide a probe of the valence quark spin (or helicity difference)\ndistribution in the nucleon.",
        "category": "hep"
    },
    {
        "text": "A status report concerning theoretical predictions for various kaon\n  decays: A short overview of theoretical predictions for various kaon decays is\npresented. Particular attention is devoted to pure and radiative nonleptonic\ndecays in the framework of Chiral Perturbation Theory. The relevance of KLOE's\nfuture results to improve our knowledge of kaon physics and more generally of\nthe Standard Model at low energy is also emphasized.",
        "category": "hep"
    },
    {
        "text": "TASI 2014 Lectures: The Hunt for Dark Matter: These lectures, given at the 2014 Theoretical Advanced Study Institute\n(TASI), are an introduction to what we know at present about dark matter and\nthe major current experimental and observational efforts to identify what it\nconsists of. They attempt to present the complexities of the subject, making\nclear common simplifying assumptions, to better understand the reach of dark\nmatter searches.",
        "category": "hep"
    },
    {
        "text": "A trial to find an elliptic quantum algebra for $sl_2$ using the\n  Heisenberg and Clifford algebra: A Heisenberg-Clifford realization of a deformed $U(sl_{2})$ by two parameters\n$p$ and $q$ is discussed. The commutation relations for this deformed algebra\nhave interesting connection with the theta functions.",
        "category": "hep"
    },
    {
        "text": "Compton scattering in the Endpoint Model: We use the Endpoint model for exclusive hadronic processes to study Compton\nscattering of the proton. The parameters of the Endpoint model are fixed using\nthe data for $F_1$ and the ratio of Pauli and Dirac form factors ($F_2/F_1$)\nand then used to get numerical predictions for the differential scattering\ncross section. We studied the Compton scattering at fixed $\\theta_{CM}$ in the\n$s \\sim t \\gg \\Lambda_{QCD}$ limit and at fixed $s$ much larger than $t$ limit.\nWe observed that the calculations in the Endpoint Model give a good fit with\nexperimental data in both regions.",
        "category": "hep"
    },
    {
        "text": "Circularly polarized gravitational waves in Chern-Simons gravity\n  originated from an axion domain wall: We study a scattering problem of gravitational waves (GWs) by an axion domain\nwall in Chern-Simons (CS) gravity. We find that circular polarization of GWs is\nproduced after passing through the domain wall. It turns out that the circular\npolarization is sizable if the frequency of the GW is comparable to a critical\nvalue determined by the characteristic CS length scale and the energy scale of\nthe axion domain wall. Thus, observations of the circular polarization could\ngive a stringent constraint on the characteristic CS length scale or could be a\nnew avenue to search for axion.",
        "category": "hep"
    },
    {
        "text": "Model analysis of thermal UV-cutoff effects on the chiral critical\n  surface at finite temperature and chemical potential: We study the effects of temporal UV-cutoff on the chiral critical surface in\nhot and dense QCD using a chiral effective model. Recent lattice QCD\nsimulations indicate that the curvature of the critical surface might change\ntoward the direction in which the first order phase transition becomes stronger\non increasing the number of lattice sites. To investigate this effect on the\ncritical surface in an effective model approach, we use the Nambu-Jona-Lasinio\nmodel with finite Matsubara frequency summation. We find that qualitative\nfeature of the critical surface does not alter appreciably as we decrease the\nsummation number, which is unlike the case what is observed in the recent\nlattice QCD studies. This may either suggest the dependence of chemical\npotential on the coupling strength or due to some additional interacting terms\nsuch as vector interactions which could play an important role at finite\ndensity.",
        "category": "hep"
    },
    {
        "text": "Fermion Zero Modes and Cosmological Constant: A general condition for the existence of fermion zero modes is derived for\nthe M-5-brane, the M-2-brane and the D=4, N=2 Majumdar-Papapetrou 0-brane. The\nfermion zero modes of these p-branes do not exist if the supersymmetry spinor\ngenerator goes to a constant at the horizon and they exist only if it vanishes\nthere. In particular it is shown that the fermion zero mode of the M-2-brane in\nD=11 can be forbidden from existence if Rarita-Schwinger gamma tracelessness\ncondition is imposed on the gravitino field. Non-existence of fermion zero mode\nis interpreted, in analogy to the three dimensional example of Becker et.al.,\nas a world with zero cosmological constant without supersymmetric excited\nstates. Also derived are the spin of the M-5-brane and its 3-form electric and\nmagnetic dipole moments.",
        "category": "hep"
    },
    {
        "text": "Non-planar BCFW Grassmannian Geometries: In this paper, we study non-adjacent BCFW recursion relations and their\nconnection to positive geometry. For an adjacent BCFW shift, the $n$-point\nN$^k$MHV tree-level amplitude in ${\\cal N}=4$ SYM theory is expressed as a sum\nover planar on-shell diagrams, corresponding to canonical dlog forms on the\ncells in the positive Grassmannian $G_+(k,n)$. Non-adjacent BCFW shifts\nnaturally lead to an expansion of the amplitude in terms of a different set of\nobjects, which do not manifest the cyclic ordering and the hidden Yangian\nsymmetry of the amplitude. We show that these terms can be interpreted as dlog\nforms on the non-planar Grassmannian geometries, generalizing the cells of the\npositive Grassmannian $G_+(k,n)$ to a larger class of objects which live in\n$G(k,n)$. We focus mainly on the case of NMHV amplitudes and discuss in detail\nthe Grassmannian geometries. We also propose an alternative way to calculate\nthe associated on-shell functions and dlog forms using an intriguing connection\nbetween Grassmannian configurations and the geometry in the kinematical space.",
        "category": "hep"
    },
    {
        "text": "Searching Higgs in Noncommutative Electroweak Model at Photon-Photon\n  Collider: We discuss the process of Higgs boson production in $\\gamma\\gamma$ collider\non noncommutative spacetime and compare the results with large extra dimension\nin KK graviton channel. Summing all KK mode on IR brane, the affections are in\nthe same order by comparing noncommutatve model prediction. This process is\ncompletely forbidden in standard model on unitarity condition and bosonic\ndistribution. In noncommutative theory, the effect is induced by the\ncoordinates noncommutable relation, $[x^{\\mu}, x^{\\nu}]$ = $i\\theta^{\\mu\\nu}$.\nDue to the constant background strength tensor does not contain any conserved\nquantum number, hence, this effort is indicated into particle power spectrum.\nParticle mass spectrum is corrected by radiational and anisotropic\nsurroundings. The process of $\\gamma\\gamma\\to H^{0}H^{0}$ restricts the\nunitarity condition in noncommutative field theory. Under power law\nconservation condition, the neutral Higgs mass below gauge boson resonance will\nproduce a accelerated phenomena as the central energy is higher than $Z_{0}$\ngauge boson creation scale. The effects generated from the vast light Higgs\nparticles descend the power rate energy distribution as far as the ambient is\nunder a balance. The fractional rate on polarized polars are very small\nembedded into the unpolarized surroundings depend on background electric field\ncouplings.",
        "category": "hep"
    },
    {
        "text": "Measurement of the Resonance Parameters of the $\u03c7_{1}(1^3P_1)$ and\n  $\u03c7_{2}(1^3P_2)$ States of Charmonium formed in Antiproton-Proton\n  Annihilations: We have studied the $^3P_J$ ($\\chi_c)$ states of charmonium in formation by\nantiproton-proton annihilations in experiment E835 at the Fermilab Antiproton\nSource. We report new measurements of the mass, width, and $B(\\chi_{cJ} \\to\n\\bar{p} p) \\times \\Gamma(\\chi_{cJ} \\to J/\\psi + anything)$ for the $\\chi_{c1}$\nand $\\chi_{c2}$ by means of the inclusive reaction $\\bar{p}p \\to \\chi_{cJ}\n  \\to J/\\psi + anything \\to (e^{+}e^{-}) +anything $. Using the subsample of\nevents where $\\chi_{cJ} \\to \\gamma + J/\\psi \\to \\gamma + (e^{+}e^{-}) $ is\nfully reconstructed, we derive $B(\\chi_{cJ} \\to \\bar p p)\\times\n\\Gamma(\\chi_{cJ} \\to J/\\psi + \\gamma) $. We summarize the results of the E760\n(updated) and E835 measurements of mass, width and $ B(\\chi_{cJ} \\to \\bar{p}p)\n\\Gamma(\\chi_{cJ} \\to J/\\psi+\\gamma)$ (J=0,1,2) and discuss the significance of\nthese measurements.",
        "category": "hep"
    },
    {
        "text": "CP violation including universal one-loop corrections and heterotic\n  M-theory: CP violation by soft supersymmetry-breaking terms in orbifold\ncompactifications is investigated. We include the universal part of the\nmoduli-dependent threshold corrections in the construction of the\nnon-perturbative effective potential due to gaugino-condensation. This allows\ninterpolation of the magnitude of CP violating phases between the weakly and\nstrongly coupled regimes. We find that the universal threshold corrections have\na large effect on the CP violating phases in the weakly coupled regime.",
        "category": "hep"
    },
    {
        "text": "DBI-Curvaton: In this paper, we study a curvaton model described by a\nDirac-Born-Infeld-like action. We calculate the spectrum of curvature\nperturbation induced by DBI-curvaton and estimate its non-Gaussianity. We find\nthat in the limit of low sound speed the amplitude of curvature perturbation is\nenhanced more than that in DBI inflation. This result also means that the\ninflationary scale with DBI-curvaton may be lower than that in usual curvaton\nmodel. In addition, we also find that the local non-Gaussianity level in\nDBI-curvaton is generally about 10 times larger than that in usual curvaton\nmodel, which is interesting for current observations. This work in some sense\nexplores a new application of brane-cosmology in inflation.",
        "category": "hep"
    },
    {
        "text": "Coherent Showers in Decays of Colored Resonances: We present a new approach to coherent parton showers in the decays of\ncoloured resonances, based on the notion of \"resonance-final\" (RF) QCD\nantennae. A full set of mass- and helicity-dependent $2\\to 3$ antenna functions\nare defined, with the additional requirement of positivity over the respective\nbranching phase spaces. Their singularity structure is identical to that of\ninitial-final (IF) antennae in $2\\to N$ hard processes (once mass terms\nassociated with the incoming legs are allowed for), but the phase-space\nfactorisations are different. The consequent radiation patterns respect QCD\ncoherence (at leading colour) and reduce to\nDokshitzer-Gribov-Lipatov-Altarelli-Parisi and eikonal kernels in the\nrespective collinear and soft limits. The main novelty in the phase-space\nfactorisation is that branchings in RF antennae impart a collective recoil to\nthe other partons within the same decay system. An explicit implementation of\nthese ideas, based on the Sudakov veto algorithm, is provided in the VINCIA\nantenna-shower plug-in to the PYTHIA 8 Monte Carlo event generator. We apply\nour formalism, matched to next-to-leading order accuracy using POWHEG, to top\nquark production at the LHC, and investigate implications for direct\nmeasurement of the top quark mass. Finally, we make recommendations for\nassessing theoretical uncertainties arising from parton showers in this\ncontext.",
        "category": "hep"
    },
    {
        "text": "Static QCD Potential at r < 1/Lambda_QCD: Perturbative expansion and\n  operator-product expansion: We analyze the static QCD potential V_QCD(r) in the distance region 0.1 fm <\nr < 1 fm using perturbative QCD and OPE as basic theoretical tools. We assemble\ntheoretical developments up to date and perform a solid and accurate analysis.\nThe analysis consists of 3 major steps: (I) We study large-order behavior of\nthe perturbative series of V_QCD(r) analytically. (II) In the frame of OPE, we\ndefine two types of renormalization schemes for the leading Wilson coefficient.\n(III) We compare numerically perturbative predictions of the Wilson coefficient\nand lattice computations of V_QCD(r). We perform fits to simultaneously\ndetermine non-perturbative contribution and the relation between lattice scale\nand Lambda_MSbar. (Short version)",
        "category": "hep"
    },
    {
        "text": "Plasma Effects on Lasing of Uniform Ultralight Axion Condensate: Lasing of ultralight axion condensate into photons can be sensitive to the\npresence of a background plasma owing to its coupling to electromagnetism. Such\na scenario is particularly relevant for superradiant axion condensate around\nstellar mass black holes since the axion mass can be within a few orders of\nmagnitude of the plasma frequency of the surrounding medium. In this paper I\ndiscuss the properties of the plasma around a black hole and analyze its\neffects on the lasing of a uniform axion condensate of mass of the order of the\nplasma frequency.",
        "category": "hep"
    },
    {
        "text": "Emergent Majorana Mass and Axion Couplings in Superfluids: Axions (in the general sense) may acquire qualitatively new couplings inside\nsuperfluids. Their conventional couplings to fermions, in empty space, involve\npurely imaginary masses; the new couplings involve emergent Majorana masses.\nThe possibility of weak links for axions, recently put forward, is analyzed,\nrejected, and replaced with a non-local analogue.",
        "category": "hep"
    },
    {
        "text": "The contribution of off-shell gluons to the structure functions F_2^c\n  and F_L^c$ and the unintegrated gluon distributions: We calculate the perturbative parts of the structure functions $F_2^c$ and\n$F_L^c$ for a gluon target having nonzero transverse momentum squared at order\n$\\alpha_s$. The results of the double convolution (with respect to the Bjorken\nvariable $x_B$ and the transverse momentum) of the perturbative part and the\nunintegrated gluon densities are compared with HERA experimental data for\n$F_2^c$. The contribution from $F_L^c$ structure function ranges (10-30)% of\nthat of $F_2^c$ at the kinematical range of HERA experiments.",
        "category": "hep"
    },
    {
        "text": "One-loop quantization of rigid spinning strings in $AdS_3 \\times S^3\n  \\times T^4$ with mixed flux: We compute the one-loop correction to the classical dispersion relation of\nrigid closed spinning strings with two equal angular momenta in the $AdS_3\n\\times S^3 \\times T^4$ background supported with a mixture of R-R and NS-NS\nthree-form fluxes. This analysis is extended to the case of two arbitrary\nangular momenta in the pure NS-NS limit. We perform this computation by means\nof two different methods. The first method relies on the Euler-Lagrange\nequations for the quadratic fluctuations around the classical solution, while\nthe second one exploits the underlying integrability of the problem through the\nfinite-gap equations. We find that the one-loop correction vanishes in the pure\nNS-NS limit.",
        "category": "hep"
    },
    {
        "text": "Lagrangian Formulations of Self-dual Gauge Theories in Diverse\n  Dimensions: In this work, we study Lagrangian formulations for self-dual gauge theories,\nalso known as chiral $n$-form gauge theories, for $n = 2p$ in $D = 4p+2$\ndimensional spacetime. Motivated by a recent formulation of M5-branes derived\nfrom the BLG model, we generalize the earlier Lagrangian formulation based on a\ndecomposition of spacetime into $(D-1)$ dimensions plus a special dimension, to\nconstruct Lagrangian formulations based on a generic decomposition of spacetime\ninto $D'$ and $D\" = D - D'$ dimensions. Although the Lorentz symmetry is not\nmanifest, we prove that the action is invariant under modified Lorentz\ntransformations.",
        "category": "hep"
    },
    {
        "text": "Transverse Momentum Spectra of Pions at LHC Energies: In order to characterize the transverse momentum spectra of positive pions\nmeasured in the ALICE experiment, two thermal approaches are utilized; one is\nbased on degeneracy of non-perfect Bose-Einstein gas and the other imposes an\n{\\it ad-hoc} finite pion-chemical potential. The inclusion of missing haron\nstates and the out-of-chemical equilibrium greatly contribute to the excellent\ncharacterization of pion production. The excellent reproduction of the\nexperimental data can be understood as a manifestation of not-yet-regarded\nanomalous pion-production, which likely contribute to the long-standing debate\non the {\\it \"anomalous\"} proton-to-pion ratios at top RHIC and LHC energies.",
        "category": "hep"
    },
    {
        "text": "Dark Freeze-out Cogenesis: We propose a new mechanism where a multi-component dark sector generates the\nobserved dark matter abundance and baryon asymmetry and thus addresses the\ncoincidence between the two. The thermal freeze-out of dark matter annihilating\ninto meta-stable dark partners sets the dark matter relic abundance while\nproviding the out-of-equilibrium condition for baryogenesis. The meta-stable\nstate triggers baryon asymmetry production by its decay well after the\nfreeze-out and potentially induces a period of early matter domination before\nits decay. The dark matter and baryon abundances are related through number\nconservation within the dark sector (cogenesis). The \"coincidence\" is a natural\noutcome with GeV- to TeV-scale symmetric dark matter and the dark sector's\ninteractions with the Standard Model quarks. We present a UV-complete model and\nexplore its phenomenological predictions, including dark matter direct\ndetection signals, LHC signatures of new massive particles with color charges\nand long-lived particles with displaced vertices, dark matter-induced nucleon\nconversions, (exotic) dark matter indirect detection signals, and effects on\nthe cosmological matter power spectrum. As a side result, we provide a novel\nanalytical treatment for dark sector freeze-out, which may prove useful in the\nstudy of related scenarios.",
        "category": "hep"
    },
    {
        "text": "Finite volume effects with stationary wave solution from\n  Nambu--Jona-Lasinio model: In this paper, we use the two-flavor Nambu-Jona-Lasinio (NJL) model with the\nproper time regularization to study the finite-volume effects of QCD chiral\nphase transition.\n  Within a cubic volume of finite size $L$, we choose the stationary wave\ncondition (SWC) as the real physical spatial boundary conditions of quark\nfields and compare our results with that by means of commonly used\n(anti-)period boundary condition (APBC or PBC). It is found that the results by\nmeans of SWC are obviously different to the results from the APBC or PBC.\nAlthough the three boundary conditions give the same chiral crossover\ntransition curve in the infinite volume limit, the limit size $L_0$ (when\n$L\\geq L_{0}$, the chiral quark condensate $-\\left\\langle { \\bar \\psi \\psi}\n\\right\\rangle_L$ is indistinguishable from that at $L=\\infty$) using SWC is\n$L_0\\approx 500$ fm which is much larger than the results obtained using APBC\nor PBC. More importantly, $L_0\\approx 500$ fm is also much large than the\ntypical size of the quark-gluon plasma produced by the relativistic heavy ion\ncollisions. This means that the finite volume effects play a very important\nrole in Relativistic Heavy Ion Collisions. In addition, we also found that when\n$L\\leq 2$ fm, even at zero temperature the chiral symmetry is effectively\nrestored. Furthermore, to quantitatively reflect the finite volume effects on\nthe QCD chiral phase transition, we introduce a new vacuum susceptibility,\n$\\chi_{1/L}(T)=-\\frac{\\partial \\left\\langle { \\bar \\psi \\psi}\n\\right\\rangle}{\\partial (1/L)}$. With this new vacuum susceptibility, it is\nvery interesting to find $\\chi_{1/L}(T=0)=\\chi_{1/L}(T=1/L)$ for SWC.",
        "category": "hep"
    },
    {
        "text": "Gravitational instanton, inflation and cosmological constant: Quantum fluctuation of unstable modes about gravitational instantons causes\nthe instability of flat space at finite temperature, leading to the spontaneous\nprocess of nucleating quantum black holes. The density of vacuum energy-gain in\nsuch process gives the cosmological term in the Einstein equation. This\nnaturally results in the inflationary phase of Early Universe. While the\nreheating phase is attributed to the Hawking radiation of these quantum black\nholes. In the Standard cosmology era, this cosmological term depends on the\nreheating temperature and asymptotically approaches to the cosmological\nconstant in matter domination phase, consistently with current observations.",
        "category": "hep"
    },
    {
        "text": "Charm and Bottom Production Measurements at the LHC: Early data of the ATLAS and CMS experiments at the LHC will allow us to\nmeasure the cross sections for beauty and heavy quarkonia production in\nproton-proton collisions at a center-of-mass energy of 14 TeV to a reasonable\nprecision. Different experimental approaches employing single or di-muon\ntriggered events and b-tagging methods are discussed. The potential for\nextracting the polarization of vector states from the decays J/psi to mu+ mu-\nand Y to mu+ mu- is presented.",
        "category": "hep"
    },
    {
        "text": "Geometric engineering of (framed) BPS states: BPS quivers for N=2 SU(N) gauge theories are derived via geometric\nengineering from derived categories of toric Calabi-Yau threefolds. While the\noutcome is in agreement of previous low energy constructions, the geometric\napproach leads to several new results. An absence of walls conjecture is\nformulated for all values of N, relating the field theory BPS spectrum to large\nradius D-brane bound states. Supporting evidence is presented as explicit\ncomputations of BPS degeneracies in some examples. These computations also\nprove the existence of BPS states of arbitrarily high spin and infinitely many\nmarginal stability walls at weak coupling. Moreover, framed quiver models for\nframed BPS states are naturally derived from this formalism, as well as a\nmathematical formulation of framed and unframed BPS degeneracies in terms of\nmotivic and cohomological Donaldson-Thomas invariants. We verify the\nconjectured absence of BPS states with \"exotic\" SU(2)_R quantum numbers using\nmotivic DT invariants. This application is based in particular on a complete\nrecursive algorithm which determine the unframed BPS spectrum at any point on\nthe Coulomb branch in terms of noncommutative Donaldson-Thomas invariants for\nframed quiver representations.",
        "category": "hep"
    },
    {
        "text": "Quantum Kramers-Wannier Duality And Its Topology: We show for any oriented surface, possibly with a boundary, how to generalize\nKramers-Wannier duality to the world of quantum groups. The generalization is\nmotivated by quantization of Poisson-Lie T-duality from the string theory.\nCohomologies with quantum coefficients are defined for surfaces and their\nmeaning is revealed. They are functorial with respect to some glueing\noperations and connected with q-invariants of 3-folds.",
        "category": "hep"
    },
    {
        "text": "Non-standard interactions from the future neutrino solar sector: The next-generation neutrino experiment JUNO will determine the solar\noscillation parameters - $\\sin^2 \\theta_{12}$ and $\\Delta m^2_{21}$ - with\ngreat accuracy, in addition to measuring $\\sin^2\\theta_{13}$, $\\Delta\nm^2_{31}$, and the mass ordering. In parallel, the continued study of solar\nneutrinos at Hyper-Kamiokande will provide complementary measurements in the\nsolar sector. In this paper, we address the expected sensitivity to\nnon-universal and flavour-changing non-standard interactions (NSI) with\n$d$-type quarks from the combination of these two future neutrino experiments.\nWe also show the robustness of their measurements of the solar parameters\n$\\sin^2 \\theta_{12}$ and $\\Delta m^2_{21}$ in the presence of NSI. We study the\nimpact of the exact experimental configuration of the Hyper-Kamiokande\ndetector, and conclude it is of little relevance in this scenario. Finally, we\nfind that the LMA-D solution is expected to be present if no additional input\nfrom non-oscillation experiments is considered.",
        "category": "hep"
    },
    {
        "text": "Rapidity Gaps Between Jets: An excess of events with a rapidity gap between jets, over what would be\nexpected from non-diffractive processes, has been observed at HERA. A process\nbased on a perturbative QCD calculation of colour singlet exchange has been\nadded to HERWIG. With this addition, HERWIG is able to describe the number of\nevents with a gap between jets over the number without a gap. This gap fraction\nis predicted to rise at large rapidity intervals between jets which would only\nbe visible if the detector coverage were increased.",
        "category": "hep"
    },
    {
        "text": "Gauging Spacetime Symmetries on the Worldsheet and the Geometric\n  Langlands Program: We study the two-dimensional twisted (0,2) sigma-model on various smooth\ncomplex flag manifolds G/B, and explore its relevance to the geometric\nLanglands program. We find that an equivalence - at the level of the\nholomorphic chiral algebra - between a bosonic string on G/B and a B-gauged\nversion of itself on G, will imply an isomorphism of classical W-algebras and a\nlevel relation which underlie a geometric Langlands correspondence for\nG=SL(N,C). This furnishes an alternative physical interpretation of the\ngeometric Langlands correspondence for G=SL(N,C), to that demonstrated earlier\nby Kapustin and Witten via an electric-magnetic duality of four-dimensional\ngauge theory. Likewise, the Hecke operators and Hecke eigensheaves will have an\nalternative physical interpretation in terms of the correlation functions of\nlocal operators in the holomorphic chiral algebra of a quasi-topological\nsigma-model without boundaries. A forthcoming paper will investigate the\ninterpretation of a ``quantum'' geometric Langlands correspondence for\nG=SL(N,C) in a similar setting, albeit with fluxes of the sigma-model moduli\nwhich induce a ``quantum'' deformation of the relevant classical algebras\nturned on.",
        "category": "hep"
    },
    {
        "text": "Rare Semileptonic $B_{s}$ Decays to $\u03b7$ and $\u03b7'$ mesons in QCD: We analyze the rare semileptonic $B_s \\to (\\eta, \\eta') l^+ l^-$, $(l=e, \\mu,\n\\tau)$ and $B_s \\to (\\eta, \\eta') \\nu \\bar{\\nu}$ transitions probing the $\\bar\ns s$ content of the $\\eta$ and $\\eta'$ mesons via three--point QCD sum rules.\nWe calculate responsible form factors for these transitions in full theory.\nUsing the obtained form factors, we also estimate the related branching\nfractions and longitudinal lepton polarization asymmetries. Our results are in\na good consistency with the predictions of the other existing nonperturbative\napproaches.",
        "category": "hep"
    },
    {
        "text": "Little String Instanton Partition Functions and Scalar Propagators: We discuss a class of Little String Theories (LSTs) whose low energy\ndescriptions are supersymmetric gauge theories on the $\\Omega$-background with\ngauge group $U(N)$ and matter in the adjoint representation. We show that the\ninstanton partition function of these theories can be written in terms of\nKronecker-Eisenstein series, which in a particular limit of the deformation\nparameters of the $\\Omega$-background organise themselves into Greens functions\nof free scalar fields on a torus. We provide a concrete identification between\n(differences of) such propagators and Nekrasov subfunctions. The latter are\nalso characterised by counting specific holomorphic curves in a Calabi-Yau\nthreefold $X_{N,1}$ which engineers the LST. Furthermore, using the formulation\nof the partition function in terms of the Kronecker-Eisenstein series, we argue\nfor new recursive structures which relate higher instanton contributions to\nproducts of lower ones.",
        "category": "hep"
    },
    {
        "text": "Shockwaves in Supernovae: New Implications on the Diffuse Supernova\n  Neutrino Background: We investigate shock wave effects upon the diffuse supernova neutrino\nbackground using dynamic profiles taken from hydrodynamical simulations and\ncalculating the neutrino evolution in three flavors with the S-matrix\nformalism. We show that the shock wave impact is significant and introduces\nmodifications of the relic fluxes by about $20 \\%$ and of the associated event\nrates at the level of $10-20 \\%$. Such an effect is important since it is of\nthe same order as the rate variation introduced when different oscillation\nscenarios (i.e. hierarchy or $\\theta_{13}$) are considered. In addition, due to\nthe shock wave, the rates become less sensitive to collective effects, in the\ninverted hierarchy and when $\\sin^2 2 \\theta_{13}$ is between the Chooz limit\nand $10^{-5}$. We propose a simplified model to account for shock wave effects\nin future predictions.",
        "category": "hep"
    },
    {
        "text": "Quantum Electric Field Fluctuations and Potential Scattering: Some physical effects of time averaged quantum electric field fluctuations\nare discussed. The one loop radiative correction to potential scattering are\napproximately derived from simple arguments which invoke vacuum electric field\nfluctuations. For both above barrier scattering and quantum tunneling, this\neffect increases the transmission probability. It is argued that the shape of\nthe potential determines a sampling function for the time averaging of the\nquantum electric field operator. We also suggest that there is a\nnonperturbative enhancement of the transmission probability which can be\ninferred from the probability distribution for time averaged electric field\nfluctuations.",
        "category": "hep"
    },
    {
        "text": "Form Factors of $B_{u,d,s}$ Decays into P-Wave Axial-Vector Mesons in\n  the Light-Cone Sum Rule Approach: We calculate the vector and axial-vector form factors of $B_{u,d,s}$ decays\ninto P-wave axial-vector mesons in the light-cone sum rule approach. For the\nsum rule results, we have included corrections of order $m_A/m_b$, where $m_A$\nis the mass of the axial-vector meson $A$. The results are relevant to the\nlight-cone distribution amplitudes of the axial-vector mesons. It is important\nto note that, owing to the $G$-parity, the chiral-even two-parton light-cone\ndistribution amplitudes of the $^3P_1$ ($^1P_1$) mesons are symmetric\n(antisymmetric) under the exchange of quark and anti-quark momentum fractions\nin the SU(3) limit. For chiral-odd light-cone distribution amplitudes, it is\nthe other way around. The predictions for decay rates of $B_{u,d,s} \\to A e\n\\nu_e$ are also presented.",
        "category": "hep"
    },
    {
        "text": "FEWZ 2.0: A code for hadronic Z production at next-to-next-to-leading\n  order: We introduce an improved version of the simulation code FEWZ (Fully Exclusive\nW and Z Production) for hadron collider production of lepton pairs through the\nDrell-Yan process at next-to-next-to-leading-order (NNLO) in the strong\ncoupling constant. The program is fully differential in the phase space of\nleptons and additional hadronic radiation. The new version offers users\nsignificantly more options for customization. FEWZ now bins multiple,\nuser-selectable histograms during a single run, and produces parton\ndistribution function (PDF) errors automatically. It also features a\nsignifcantly improved integration routine, and can take advantage of multiple\nprocessor cores locally or on the Condor distributed computing system. We\nillustrate the new features of FEWZ by presenting numerous phenomenological\nresults for LHC physics. We compare NNLO QCD with initial ATLAS and CMS\nresults, and discuss in detail the effects of detector acceptance on the\nmeasurement of angular quantities associated with Z-boson production. We\naddress the issue of technical precision in the presence of severe phase-space\ncuts.",
        "category": "hep"
    },
    {
        "text": "Gauge conditions for an Abelian Chern-Simons system consistent with\n  equations of motion: Complete constraint analysis and choice of gauge conditions consistent with\nequations of motion is done for Abelian Chern Simons field interacting\nminimally with a complex scalar field. The Dirac-Schwinger consistency\ncondition is satisfied by the reduced phase space Hamiltonian density with\nrespect to the the Dirac bracket. It is shown that relativistic invariance\nunder boosts can be obtained only if gauge conditions were chosen consistent\nwith the equations of motion. Moreover all gauge invariant quantities are shown\nto be free of transformation anomaly.",
        "category": "hep"
    },
    {
        "text": "Five Jet Production with Heavy Quarks at $e^+ e^-$ Colliders: Heavy quark production in five jet events at $e^+e^-$ colliders is studied at\ntree level using helicity amplitudes. Total production rates for $2b3j$ and\n$4bj$ are given and compared with the corresponding results for massless\nquarks. The process $e^+e^-\\rightarrow q\\bar q gg\\gamma$ which is the dominant\ncontribution to $4j\\gamma$ production is briefly discussed.",
        "category": "hep"
    },
    {
        "text": "Indirect searches for sterile neutrinos at a high-luminosity Z-factory: A future high-luminosity $Z$-factory will offer the possibility to study rare\n$Z$ decays, as those leading to lepton flavour violating final states.\nProcesses such as $Z \\to \\ell_1^\\mp \\ell_2^\\pm$ are potentially complementary\nto low-energy (high-intensity) observables of lepton flavour violation. In this\nwork we address the impact of new sterile fermions on lepton flavour violating\n$Z$ decays, focusing on potential searches at FCC-ee (TLEP), and taking into\naccount experimental and observational constraints on the sterile states. We\nconsider a minimal extension of the Standard Model by one sterile fermion\nstate, and two well-motivated frameworks of neutrino mass generation, the\nInverse Seesaw embedded into the Standard Model, and the $\\nu$MSM. Our study\nshows that sterile neutrinos can give rise to contributions to BR($Z \\to\n\\ell_1^\\mp \\ell_2^\\pm$) within reach of the FCC-ee. We also discuss the\ncomplementarity between a high-luminosity $Z$-factory and low-energy charged\nlepton flavour violation facilities.",
        "category": "hep"
    },
    {
        "text": "Shift of Symmetries of Naive Fermions in QCD-like Lattice Theories: We study the global symmetries of naive lattices Dirac operators in QCD-like\ntheories in any dimension larger than two. In particular we investigate how the\nchosen number of lattice sites in each direction affects the global symmetries\nof the Dirac operator. These symmetries are important since they do not only\ndetermine the infra-red spectrum of the Dirac operator but also the symmetry\nbreaking pattern and, thus, the lightest pseudo-scalar mesons. We perform the\nsymmetry analysis and discuss the possible zero modes and the degree of\ndegeneracy of the lattice Dirac operators. Moreover we explicitly identify a\n\"reduced\" lattice Dirac operator which is the naive Dirac operator apart from\nthe degeneracy. We verify our predictions by comparing Monte Carlo simulations\nof QCD-like theories in the strong coupling limit with the corresponding random\nmatrix theories.",
        "category": "hep"
    },
    {
        "text": "Giant Gravitons, Harish-Chandra integrals, and BPS states in symplectic\n  and orthogonal $\\mathcal{N}$= 4 SYM: We find generating functions for half BPS correlators in $\\mathcal{N}=4$ SYM\ntheories with gauge groups $Sp(2N)$, $SO(2N+1)$, and $SO(2N)$ by computing the\nnorms of a class of BPS coherent states. These coherent states are built from\noperators involving Harish-Chandra integrals. Such operators have an\ninterpretation as localized giant gravitons in the bulk of anti-de-Sitter\nspace. This extends the analysis of \\cite{Berenstein:2022srd} to $Sp(2N)$,\n$SO(2N+1)$, and $SO(2N)$ gauge theories. We show that we may use ordinary Schur\nfunctions as a basis for the sector of states with no cross-caps in these\ntheories. This is consistent with the construction of these theories as\norientifold projections of an $SU(2N)$ theory. We make note of some relations\nbetween the symmetric functions that appear in the expansion of these coherent\nstates and symplectic Schur functions. We also comment on some connections to\nSchubert calculus and Gromov-Witten invariants, which suggest that the\nHarish-Chandra integral may be extended to such problems.",
        "category": "hep"
    },
    {
        "text": "Quantum Gravity, Torsion, Parity Violation and all that: We discuss the issue of parity violation in quantum gravity. In particular,\nwe study the coupling of fermionic degrees of freedom in the presence of\ntorsion and the physical meaning of the Immirzi parameter from the viewpoint of\neffective field theory. We derive the low-energy effective lagrangian which\nturns out to involve two parameters, one measuring the non-minimal coupling of\nfermions in the presence of torsion, the other being the Immirzi parameter. In\nthe case of non-minimal coupling the effective lagrangian contains an\naxial-vector interaction leading to parity violation. Alternatively, in the\ncase of minimal coupling there is no parity violation and the effective\nlagrangian contains only the usual axial-axial interaction. In this situation\nthe real values of the Immirzi parameter are not at all constrained. On the\nother hand, purely imaginary values of the Immirzi parameter lead to violations\nof unitarity for the case of non-minimal coupling. Finally, the effective\nlagrangian blows up for the positive and negative unit imaginary values of the\nImmirzi parameter.",
        "category": "hep"
    },
    {
        "text": "Candidates for Inelastic Dark Matter: Although we have yet to determine whether the DAMA data represents a true\ndiscovery of new physics, among such interpretations inelastic dark matter\n(IDM) can match the energy spectrum of DAMA very well while not contradicting\nthe results of other direct detection searches. In this paper we investigate\nthe general properties that a viable IDM candidate must have and search for\nsimple models that realize these properties in natural ways. We begin by\ndetermining the regions of IDM parameter space that are allowed by direct\ndetection searches including DAMA, paying special attention to larger IDM\nmasses. We observe that an inelastic dark matter candidate with electroweak\ninteractions can naturally satisfy observational constraints while\nsimultaneously yielding the correct thermal relic abundance. We comment on\nseveral other proposed dark matter explanations for the DAMA signal and\ndemonstrate that one of the proposed alternatives -- elastic scattering of dark\nmatter off electrons -- is strongly disfavored when the modulated and\nunmodulated DAMA spectral data are taken into account. We then outline the\ngeneral essential features of IDM models in which inelastic scattering off\nnuclei is mediated by the exchange of a massive gauge boson, and construct\nnatural models in the context of a warped extra dimension and supersymmetry.",
        "category": "hep"
    },
    {
        "text": "New brane-like solutions in modified four-dimensional\n  Einstein-Gauss-Bonnet gravity: We investigate solutions of a new $4D$ Einstein-Gauss-Bonnet gravity. We\nfirst describe the bulk vacuum solution, then we add a massive probe scalar\nfield, and we follow considering a self-interacting scalar field which acts as\na source to support thick brane solutions in the four-dimensional\nEinstein-Gauss-Bonnet scenario with a single extra dimension of infinite\nextent. We illustrate our results with some distinct brane-like configurations\nengendering controllable thickness.",
        "category": "hep"
    },
    {
        "text": "Gauge invariance and the physical spectrum in the two-Higgs-doublet\n  model: Observable states are gauge-invariant. In a non-Abelian gauge theory, these\nare necessarily composite operators. We investigate the spectrum of these\noperators in the two-Higgs-doublet model. For this purpose, we are working\nalong the lines of the Fr\\\"ohlich-Morchio-Strocchi mechanism to relate the\nphysical spectrum to the spectrum of the elementary particles. We also\ninvestigate the consequences of spontaneous breaking of the global (custodial)\nsymmetry group. Finally, we briefly comment on how to test the results using\nlattice methods.",
        "category": "hep"
    },
    {
        "text": "Topology of Minimal Walking Technicolor: We perform a lattice study of the topological susceptibility and instanton\nsize distribution of the $\\su{2}$ gauge theory with two adjoint Dirac fermions\n(also known as Minimal Walking Technicolor), which is known to be in the\nconformal window. In the theory deformed with a small mass term, by drawing a\ncomparison with the pure gauge theory, we find that topological observables are\ndecoupled from the fermion dynamics. This provides further evidence for the\ninfrared conformality of the theory. A study of the instanton size distribution\nshows that this quantity can be used to detect the onset of finite size\neffects.",
        "category": "hep"
    },
    {
        "text": "Gauged $B - 3 L_\u03c4$ and Baryogenesis: It has recently been shown that by extending the minimal standard model to\ninclude a right-handed partner to $\\nu_\\tau$, it is possible to gauge the $B -\n3 L_\\tau$ quantum number consistently. If we add two scalar triplets, one\ntrivial ($\\xi_1$) and one nontrivial ($\\xi_2$) under $B - 3 L_\\tau$, it is\npossible also to have desirable neutrino masses and mixing for neutrino\noscillations. At the same time, a lepton asymmetry can be generated in the\nearly universe through the novel mechanism of the decay of the heavier $\\xi_1$\ninto the lighter $\\xi_2$ plus a neutral singlet ($\\zeta^0$). This lepton\nasymmetry then gets converted into a baryon asymmetry at the electroweak phase\ntransition.",
        "category": "hep"
    },
    {
        "text": "Energy Correlators Taking Charge: The confining transition from asymptotically free partons to hadrons remains\none of the most mysterious aspects of Quantum Chromodynamics. With the wealth\nof high quality jet substructure data we can hope to gain new experimental\ninsights into the details of its dynamics. Jet substructure has traditionally\nfocused on correlations, $\\langle \\mathcal{E}(n_1) \\mathcal{E}(n_2) \\cdots\n\\mathcal{E}(n_k) \\rangle$, in the energy flux of hadrons. However,\nsignificantly more information about the confinement transition is encoded in\nhow energy is correlated between hadrons with different quantum numbers, for\nexample electric charge. In this Letter we develop the field theoretic\nformalism to compute general correlations, $\\langle \\mathcal{E}_{R_1}(n_1)\n\\mathcal{E}_{R_2}(n_2) \\cdots\\mathcal{E}_{R_k}(n_k) \\rangle$, between the\nenergy flux carried by hadrons with quantum numbers $R_i$, by introducing new\nuniversal non-perturbative functions, which we term joint track functions.\nUsing this formalism we show that the strong interactions introduce enhanced\nsmall angle correlations between opposite-sign hadrons, relative to like-sign\nhadrons, identifiable as an enhanced scaling of $\\langle \\mathcal{E}_+(n_1)\n\\mathcal{E}_-(n_2) \\rangle$ relative to $\\langle \\mathcal{E}_+(n_1)\n\\mathcal{E}_+(n_2) \\rangle$. We are also able to compute the scaling of a\n$C$-odd three-point function, $\\langle \\mathcal{E}_\\mathcal{Q}(n_1)\n\\mathcal{E}_\\mathcal{Q}(n_2) \\mathcal{E}_\\mathcal{Q}(n_3) \\rangle$. Our results\ngreatly extend the class of systematically computable jet substructure\nobservables, pushing perturbation theory deeper into the parton to hadron\ntransition, and providing new observables to understand the dynamics of\nconfinement.",
        "category": "hep"
    },
    {
        "text": "Three dimensional fermionic determinants, Chern-Simons and nonlinear\n  field redefinitions: The three dimensional abelian fermionic determinant of a two component\nmassive spinor in flat euclidean space-time is resetted to a pure Chern-Simons\naction through a nonlinear redefinition of the gauge field.",
        "category": "hep"
    },
    {
        "text": "The effect of higher dimensional QCD operators on the spectroscopy of\n  bottom-up holographic models: Within the bottom-up holographic approach to QCD, the highly excited hadrons\nare identified with the bulk normal modes in the fifth \"holographic\" dimension.\nWe show that additional states in the same mass range can appear also from\ntaking into consideration the 5D fields dual to higher dimensional QCD\noperators. The possible effects of these operators were not taken into account\nin almost all phenomenological applications. Using the scalar case as the\nsimplest example, we demonstrate that the additional higher dimensional\noperators lead to a large degeneracy of highly excited states in the Soft Wall\nholographic model while in the Hard Wall holographic model, they result in a\nproliferation of excited states. The considered model can be viewed as the\nfirst analytical toy-model predicting a one-to-one mapping of the excited meson\nstates to definite QCD operators to which they prefer to couple.",
        "category": "hep"
    },
    {
        "text": "A Search For the Higgs Boson in CMS in the Two Photon Decay Channel: We report on a search for SM Higgs Boson in the two photon decay mode\nconducted by the CMS experiment with the data accumulated during the 2010 &\n2011 running of the LHC at center of mass collision energy of 7 TeV.",
        "category": "hep"
    },
    {
        "text": "Asymptotic Scale Invariance and its Consequences: Scale invariance supplemented by the requirement of the absence of new heavy\nparticles may play an important role in addressing the hierarchy problem. We\ndiscuss how the Standard Model may become scale invariant at the quantum level\nabove a certain value of the Higgs field value without addition of new degrees\nof freedom and analyze phenomenological and cosmological consequences of this\nsetup, in particular, possible metastability of the electroweak vacuum and\nHiggs inflation.",
        "category": "hep"
    },
    {
        "text": "Spacetime models, fundamental interactions and noncommutative geometry: We discuss the problem of determining the spacetime structure. We show that\nwhen we are using only topological methods the spacetime can be modelled as an\nR- or Q-compact space although the R-compact spaces seem to be more\nappropriate. Demanding the existence of a differential structure substantially\nnarrows the choice of possible models. The determination of the differential\nstructure may be difficult if it is not unique. By using the noncommutative\ngeometry construction of the standard model we show that fundamental\ninteractions determine the spacetime in the class of R-compact spaces. Fermions\nare essential for the process of determining the spacetime structure.",
        "category": "hep"
    },
    {
        "text": "String Theory Bounds on the Cosmological Constant, the Higgs mass, and\n  the Quark and Lepton Masses: We elaborate on the new understanding of the cosmological constant and the\ngauge hierarchy problems in the context of string theory in its metastring\nformulation, based on the concepts of modular spacetime and Born geometry. The\ninterplay of phase space (and Born geometry), the Bekenstein bound, the mixing\nbetween ultraviolet (UV) and infrared (IR) physics and modular invariance in\nstring theory is emphasized. This new viewpoint is fundamentally rooted in\nquantum contextuality and not in statistical observer bias (anthropic\nprinciple). We also discuss the extension of this point of view to the problem\nof masses of quarks and leptons and their respective mixing matrices.",
        "category": "hep"
    },
    {
        "text": "From N=2 Fermionic Strings to Superstrings?: I review the covariant quantization of the critical $N{=}2$ fermionic string\nwith and without a global ${\\bf Z}_2$ twist. The BRST analysis yields massless\nbosonic and fermionic vertex operators in various ghost and picture number\nsectors, as well as picture-changers and their inverses, depending on the field\nbasis chosen for bosonization. Two distinct GSO projections exist, one\n(untwisted) retaining merely the known bosonic scalar and its spectral-flow\npartner, the other (twisted) yielding two fermions and one boson, on the\nmassless level. The absence of interactions in the latter case rules out\nstandard spacetime supersymmetry. In the untwisted theory, the\n$U(1,1)$-invariant three-point and vanishing four-point functions are confirmed\nat tree level. I comment on the $N{=}2$ string field theory, the integration\nover moduli and the realization of spectral flow.",
        "category": "hep"
    },
    {
        "text": "Integrability and Scheme-Independence of Even Dimensional Quantum\n  Geometry Effective Action: We investigate how the integrability conditions for conformal anomalies\nconstrain the form of the effective action in even-dimensional quantum\ngeometry. We show that the effective action of four-dimensional quantum\ngeometry (4DQG) satisfying integrability has a manifestly diffeomorphism\ninvariant and regularization scheme-independent form. We then generalize the\narguments to six dimensions and propose a model of 6DQG. A hypothesized form of\nthe 6DQG effective action is given.",
        "category": "hep"
    },
    {
        "text": "Renormalization of a model for spin-1 matter fields: In this work, the one-loop renormalization of a theory for fields\ntransforming in the $(1,0)\\oplus(0,1)$ representation of the Homogeneous\nLorentz Group is studied. The model includes an arbitrary gyromagnetic factor\nand self-interactions of the spin 1 field, which has mass dimension one. The\nmodel is shown to be renormalizable for any value of the gyromagnetic factor.",
        "category": "hep"
    },
    {
        "text": "Nucleon form factors: From the space-like to the time-like region: I discuss how dispersion relations can be used to analyse the nucleon\nelectromagnetic form factors, with particular emphasis on the constraints from\nunitarity and pQCD. Results for nucleon radii, vector-meson couplings, the\nonset of pQCD and bounds on the strangeness form factors are presented. The em\nform factors in the time-like region reveal some interesting physics which is\nnot yet understood in full detail. The need for a better data basis at low,\nintermediate and large momentum transfer and also in the time-like region is\nstressed.",
        "category": "hep"
    },
    {
        "text": "From lightcone actions to maximally supersymmetric amplitudes: In this article actions for N=4 SYM and N=8 supergravity are formulated in\nterms of a chiral superfield, which contains only the physical degrees of\nfreedom of either theory. In these new actions, which originate from the\nlightcone superspace, the supergravity cubic vertex is the square of the gauge\ntheory one (omitting the color structures). Amplitude calculations using the\ncorresponding Feynman supergraph rules are tedious, but can be simplified by\nchoosing a preferred superframe. Recursive calculations of all MHV amplitudes\nin N=4 SYM and the four-point N=8 supergravity amplitude are shown to agree\nwith the known results and connections to the BCFW recursion relations are\npointed out. Finally, the new path integrals are discussed in the context of\nthe double-copy property relating N=4 SYM theory to N=8 supergravity.",
        "category": "hep"
    },
    {
        "text": "Gravitational Wave from Axion-SU(2) Gauge Fields: Effective Field Theory\n  for Kinetically Driven Inflation: Building on Weinberg's approach to effective field theory for inflation, we\nconstruct an effective Lagrangian for a pseudo scalar (axion) inflaton field\nwith shift symmetry. In this Lagrangian we allow the axion field to couple to\nnon-Abelian gauge fields via a Chern-Simons term. We then analyze a class of\ninflation models driven by kinetic terms. We find that the observational\nconstraints on the amplitudes of curvature perturbations and non-Gaussianity\nyield a lower bound for the tensor-to-scalar ratio of $r\\gtrsim 5\\times\n10^{-3}$ from the vacuum fluctuation. The sourced gravitational wave from SU(2)\ngauge fields further increases the tensor-to-scalar ratio and makes the total\ngravitational wave partially chiral and non-Gaussian, which can be probed by\npolarization of the cosmic microwave background and direct detection\nexperiments. We discuss constraints on parameter space due to backreaction of\nspin-2 particles produced by the gauge field.",
        "category": "hep"
    },
    {
        "text": "Topological B-model and ${\\hat c}=1$ String Theory: We study the topological B-model on a deformed $\\Z_2$ orbifolded conifold by\ninvestigating variation of complex structures via quantum Kodaira-Spencer\ntheories. The fermionic/brane formulation together with systematic utilization\nof symmetries of the geometry gives rise to a free fermion realization of the\namplitudes. We derive Ward identities which solve the perturbed free energy\nexactly. We also obtain the corresponding Kontsevich-like matrix model. All\nthese confirm the recent conjecture on the connection of the theory with ${\\hat\nc}=1$ type 0A string theory compactified at the radius $R=\\sqrt{\\alpha'/2}$.",
        "category": "hep"
    },
    {
        "text": "Pair structure of heavy tetraquark systems: We study the pair description of heavy tetraquark systems $|QQ\\bar Q \\bar\nQ\\rangle$ in the frame of a non-relativistic potential model. By taking the two\nheavy quark pairs $(Q\\bar Q)$ as colored clusters, the four-quark Schr\\\"odinger\nequation is reduced to a two-pair equation, when the inner motion inside the\npairs can be neglected. Taking into account all the Casimir scaling potentials\nbetween two quarks and using the lattice QCD simulated mixing angle between the\ntwo color-singlet states for the tetraquark system, we extracted a detailed\npair potential between the two heavy quark pairs.",
        "category": "hep"
    },
    {
        "text": "Connection Between $\u03bd_e, \u03bd_\u03bc, \u03bd_\u03c4$ and $\u03bd_1, \u03bd_2, \u03bd_3$\n  Neutrino States and Time Dependence of Neutrino Wave Functions and Transition\n  Probabilities at Three Neutrino Oscillations in Vacuum: For description of the $d, s, b$ quark mixings the Cabibbo-Kobayashi-Maskawa\nmatrices are used but they do not contain the time dependence. In this work the\nanalogous matrix is obtained for the case of three neutrino ($\\nu_{e}, \\nu_{\\mu\n}, \\nu_{\\tau}$) mixings (oscillations) in vacuum in the general case, when CP\nviolation is absent. In contrast to the quark case this matrix contains the\ntime dependence. The matrix for probability of neutrino transitions\n(oscillations) in vacuum is also obtained. Naturally, it contains the time\ndependence. The matrix which does not contain the time dependence is obtained\nby using time $t$ averaging of this matrix. Elements of this matrix can be used\nto describe neutrino decays.",
        "category": "hep"
    },
    {
        "text": "Parametric Amplification of Gravitational Fluctuations During Reheating: We demonstrate that cosmological perturbations can undergo amplification by\nparametric resonance during the preheating period following inflation, even on\nscales larger than the Hubble radius, without violating causality. A unified\ndescription of gravitational and matter fluctuations is crucial in order to\ndetermine the strength of the instability. To extract specific signatures of\nthe oscillating inflaton field during reheating, it is essential to focus on a\nvariable describing metric fluctuations which is constant in the standard\nanalyses of inflation. When doing this in the case of a massive inflaton\nwithout self coupling, we find no additional growth of super-horizon modes\nduring reheating beyond what the usual analyses of the growth of fluctuations\npredict. However, for a massless self coupled inflaton, there is an initial\nincrease in the value of the gravitational potential, which may lead to\ndifferent predictions for observations.",
        "category": "hep"
    },
    {
        "text": "Topological Amplitudes and the String Effective Action: In this work, we study a class of higher derivative couplings in the string\neffective action arising at the junction of topological string theory and\nsupersymmetric gauge theories in the $\\Omega$-background. They generalise a\nseries of gravitational couplings involving gravitons and graviphotons, which\nreproduces the topological string theory partition function. The latter\nreduces, in the field theory limit, to the partition function of the gauge\ntheory in the $\\Omega$-background when one if its parameters, say $\\epsilon_+$,\nis set to zero. This suggests the existence of a one-parameter extension called\nthe refined topological string. The couplings considered in this work involve\nan additional vector multiplet and are evaluated, perturbatively and\nnon-perturbatively, at the string level. In the field theory limit, they\ncorrectly reproduce the partition function of the gauge theory in a general\n$\\Omega$-background. Hence, these couplings provide new perspectives toward a\nworldsheet definition of the refined topological string.",
        "category": "hep"
    },
    {
        "text": "Reflection Factors for the Principal Chiral Model: We consider the SU(2) Principal Chiral Model (at level $k=1$) on the\nhalf-line with scale invariant boundary conditions. By looking at the IR\nlimiting conformal field theory and comparing with the Kondo problem, we\npropose the set of permissible boundary conditions and the corresponding\nreflection factors.",
        "category": "hep"
    },
    {
        "text": "Reconstructing charged particle track segments with a quantum-enhanced\n  support vector machine: Reconstructing the trajectories of charged particles from the collection of\nhits they leave in the detectors of collider experiments like those at the\nLarge Hadron Collider (LHC) is a challenging combinatorics problem and\ncomputationally intensive. The ten-fold increase in the delivered luminosity at\nthe upgraded High Luminosity LHC will result in a very densely populated\ndetector environment. The time taken by conventional techniques for\nreconstructing particle tracks scales worse than quadratically with track\ndensity. Accurately and efficiently assigning the collection of hits left in\nthe tracking detector to the correct particle will be a computational\nbottleneck and has motivated studying possible alternative approaches. This\npaper presents a quantum-enhanced machine learning algorithm that uses a\nsupport vector machine (SVM) with a quantum-estimated kernel to classify a set\nof three hits (triplets) as either belonging to or not belonging to the same\nparticle track. The performance of the algorithm is then compared to a fully\nclassical SVM. The quantum algorithm shows an improvement in accuracy versus\nthe classical algorithm for the innermost layers of the detector that are\nexpected to be important for the initial seeding step of track reconstruction.",
        "category": "hep"
    },
    {
        "text": "Strangelets -- Effects of Finite Size and Exact Color Singletness: Matter consisting of up, down and strange quarks, socalled Strange Quark\nMatter, has been hypothesized to be stable in bulk, and conceivably stable or\nmetastable in finite systems---strangelets---as an alternative state to\nordinary baryonic matter. Strangelets, if they exist, may be relics from the\nhot and dense early universe, or they could be produced in high energy events,\nsuch as collisions of heavy nuclei at relativistic speeds. This thesis\ninvestigates the implications of various effects that affects the possible\n(meta-) stability of strangelets, such as finite size, distribution of quark\nstates (shell model), interaction with a hadron gas, non-zero temperature and\nQCD constraints of color singletness of the wave function. These effects are\nstudied within the phenomenological MIT bag model of quark matter using the\nmultiple reflection expansion for a liquid drop model equation of state with\ncomparison to a shell model. Finite size, non-zero temperature and color\nsinglet constraints have a destabilizing effect on strangelets, and can\nsuppress their production in heavy ion collisions.\n  The work presented has been described in part in the following publications:\n  Dan M{\\o}nster Jensen and Jes Madsen, Strangelets at Non-Zero Temperature, in\nStrangeness and Quark Matter, edited by G. Vassiliadis, A. D. Panagiotou, S.\nKumar, and J. Madsen (World Scientific, Singapore, 1995), pp. 220--229.\n  Jes Madsen, Dan M. Jensen, and Michael B. Christiansen, Color Singlet\nSuppression of Quark-Gluon Plasma Formation, Phys. Rev. C 53, 1883 (1996).\n  Dan M. Jensen and Jes Madsen, Strangelets with Finite Entropy, Phys. Rev. D\n53, R4719 (1996).\n  Dan M{\\o}nster Jensen, Jes Madsen, and Michael B. Christiansen, Color Singlet\nStrangelets, Heavy Ion Phys. 4 (1-4), 387-394 (1996).",
        "category": "hep"
    },
    {
        "text": "Assisted Contraction: We consider the dynamics of a contracting universe ruled by two minimally\ncoupled scalar fields with general exponential potentials. This model describes\nstring-inspired scenarios in the Einstein frame. Both background and\nperturbations can be solved analytically in this model. Curvature perturbations\nare generated with a scale invariant spectrum only for a dust-like collapse, as\nhappens for a single field model with an exponential potential. We find the\nconditions for which a scale invariant spectrum for isocurvature perturbation\nis generated.",
        "category": "hep"
    },
    {
        "text": "Effect of spatial fluctuations on the scaled factorial moments in\n  second-order quark-hadron phase transition within Ginzburg-Landau description: The scaled factorial moments in second-order quark-hadron phase transition\nare reexamined within the Ginzburg-Landau description, with the spatial\nfluctuations of phase angle of the complex field $\\phi$ taken into account\nrigorously. Scaling behaviors between $F_q$ and $F_2$ are shown, and the\nexponent $\\nu$ is found very close to the one without spatial fluctuations.",
        "category": "hep"
    },
    {
        "text": "Searches for exotica at LEP: The results of various searches for new physical phenomena beyond the\nStandard Model using data from the four LEP experiments are summarized. Topics\npresented include the search for flavour-changing neutral currents with single\ntop production, compositeness leading to the production of excited leptons, and\nmanifestations of extra dimensions.",
        "category": "hep"
    },
    {
        "text": "Topological susceptibility in finite temperature (2+1)-flavor QCD using\n  gradient flow: We compute the topological charge and its susceptibility in finite\ntemperature (2+1)-flavor QCD on the lattice applying a gradient flow method.\nWith the Iwasaki gauge action and nonperturbatively $O(a)$-improved Wilson\nquarks, we perform simulations on a fine lattice\nwith~$a\\simeq0.07\\,\\mathrm{fm}$ at a heavy $u$, $d$ quark mass with\n$m_\\pi/m_\\rho\\simeq0.63$ but approximately physical $s$ quark mass with\n$m_{\\eta_{ss}}/m_\\phi\\simeq0.74$. In a temperature range\nfrom~$T\\simeq174\\,\\mathrm{MeV}$ ($N_t=16$) to $697\\,\\mathrm{MeV}$ ($N_t=4$), we\nstudy two topics on the topological susceptibility. One is a comparison of\ngluonic and fermionic definitions of the topological susceptibility. Because\nthe two definitions are related by chiral Ward-Takahashi identities, their\nequivalence is not trivial for lattice quarks which violate the chiral symmetry\nexplicitly at finite lattice spacings. The gradient flow method enables us to\ncompute them without being bothered by the chiral violation. We find a good\nagreement between the two definitions with Wilson quarks. The other is a\ncomparison with a prediction of the dilute instanton gas approximation, which\nis relevant in a study of axions as a candidate of the dark matter in the\nevolution of the Universe. We find that the topological susceptibility shows a\ndecrease in $T$ which is consistent with the predicted $\\chi_\\mathrm{t}(T)\n\\propto (T/T_{\\rm pc})^{-8}$ for three-flavor QCD even at low temperature\n$T_{\\rm pc} < T\\le1.5 T_{\\rm pc}$.",
        "category": "hep"
    },
    {
        "text": "Towards a unified theory of the fundamental physical interactions based\n  on the underlying geometric structure of the tangent bundle: This paper pursues the hypothesis that the tangent bundle (TB) with the\ncentral extended little groups of the SO(3,1) group as gauge group is the\nunderlying geometric structure for a unified theory of the fundamental physical\ninteractions. Based on this hypothesis as a first step recently I presented a\ngeneralized theory of electroweak interaction which includes hypothetical dark\nmatter particles (Eur. Phys. J C 79, 779 (2019). The vertical Laplacian of the\ntangent bundle possesses the same form as the Hamiltonian of a 2D semiconductor\nquantum Hall system. This explains fractional charge quantization of quarks and\nthe existence of lepton and quark families. As will be shown the SU(3) colour\nsymmetry for strong interaction arises in the TB as an emergent symmetry\nsimilar as Chern-Simon gauge symmetries in quantum Hall systems. This predicts\na signature of quark confinement as an universal large-scale property of the\nChern-Simon fields and induces a new understanding of the vacuum as the ground\nstate occupied with a condensate of quark-antiquark pairs. The gap for\nquark-antiquark pairing is calculated in the mean-field approximation which\nallows a numerical estimation of the characteristic parameters of the vacuum\nsuch as its chemical potential, the quark condensation parameter and the vacuum\nenergy. Note that previously a gauge theoretical understanding of gravity has\nbeen achieved by considering the translation group T(3,1) in the TB as gauge\ngroup. Therefore the theory presented here can be considered as a new type of\nunified theory for all known fundamental interactions linked with the\ngeometrization program of physics.",
        "category": "hep"
    },
    {
        "text": "Neutrino and Charged Lepton Flavour Today: Flavour physics is a priceless window on physics beyond the Standard Model.\nIn particular, flavour violation in the lepton sector looks very promising, as\nhigh precision measurements are prospected in future experiments investigating\non $\\mu\\rightarrow e$ conversion in atomic nuclei: the predictions for this\nobservable are analysed in the context of the type I Seesaw mechanism.\nFurthermore, new ideas to explain the Flavour Puzzle recently appeared, mainly\nbased on a possible dynamical origin of the Yukawa couplings and on flavour\nsymmetries. The focus of this proceeding will be set on the Minimal Flavour\nViolation ansatz and on the role of the neutrino Majorana character: when an\n$O(2)_{N}$ flavour symmetry acts on the right-handed neutrino sector, the\nminimum of the scalar potential allows for large mixing angles -in contrast to\nthe simplest quark case- and predicts a maximal Majorana phase. This leads to a\nstrong correlation between neutrino mass hierarchy and mixing pattern.",
        "category": "hep"
    },
    {
        "text": "Observation of $\u039b_b^0\\rightarrow D^+ p \u03c0^-\u03c0^-$ and\n  $\u039b_b^0\\rightarrow D^{*+} p \u03c0^-\u03c0^-$ decays: The multihadron decays $\\Lambda_b^0\\rightarrow D^+ p \\pi^-\\pi^-$ and\n$\\Lambda_b^0\\rightarrow D^{*+} p \\pi^-\\pi^-$ are observed in data corresponding\nto an integrated luminosity of 3fb$^{-1}$, collected in proton-proton\ncollisions at centre-of-mass energies of 7 and 8TeV by the LHCb detector. Using\nthe~decay $\\Lambda_b^0\\rightarrow \\Lambda_c^+ \\pi^+ \\pi^-\\pi^-$ as a\nnormalisation channel, the ratio of branching fractions is measured to be $$\n\\frac { {\\mathcal{B}} ( \\Lambda_b^0\\rightarrow D^+ p \\pi^-\\pi^- ) }\n  { {\\mathcal{B}} ( \\Lambda_b^0\\rightarrow \\Lambda_c^+ \\pi^+ \\pi^-\\pi^- ) }\n  \\times\n  \\frac { {\\mathcal{B}} ( D^+ \\rightarrow K^-\\pi^+\\pi^+) }\n  { {\\mathcal{B}} ( \\Lambda_c^+ \\rightarrow p K^-\\pi^+ ) }\n  = ( 5.35 \\pm 0.21 \\pm 0.16 ) \\% \\,, $$ where the first uncertainty is\nstatistical and the second systematic. The ratio of branching fractions for\n$\\Lambda_b^0\\rightarrow D^{*+} p \\pi^-\\pi^-$ and $\\Lambda_b^0\\rightarrow D^+ p\n\\pi^-\\pi^-$ decays is found to be $$ \\frac{ {\\mathcal{B}} (\n\\Lambda_b^0\\rightarrow D^{*+} p \\pi^-\\pi^- )}\n  { {\\mathcal{B}} ( \\Lambda_b^0\\rightarrow D^{+} p \\pi^-\\pi^- )}\n  \\times\n  (\n  {\\mathcal{B}}( D^{*+} \\rightarrow \\pi^0 ) +\n  {\\mathcal{B}}( D^{*+} \\rightarrow \\gamma ))\n  = ( 61.3 \\pm 4.3 \\pm 4.0 ) \\% \\,. $$",
        "category": "hep"
    },
    {
        "text": "Imprints of Cosmic Phase Transition in Inflationary Gravitational Waves: We discuss the effects of cosmic phase transition on the spectrum of\nprimordial gravitational waves generated during inflation. The energy density\nof the scalar condensation responsible for the phase transition may become\nsizable at the epoch of phase transition, which significantly affects the\nevolution of the universe. As a result, the amplitudes of the gravitational\nwaves at high frequency modes are suppressed. Thus the gravitational wave\nspectrum can be a probe of phase transition in the early universe.",
        "category": "hep"
    },
    {
        "text": "Fermion scattering on topological solitons in the $\\mathbb{CP}^{N-1}$\n  model: The scattering of Dirac fermions in the background fields of topological\nsolitons of the $(2+1)$-dimensional $\\mathbb{CP}^{N-1}$ model is studied using\nanalytical and numerical methods. It is shown that the exact solutions for\nfermionic wave functions can be expressed in terms of the confluent Heun\nfunctions. The question of the existence of bound states for the\nfermion-soliton system is then investigated. General formulae describing\nfermion scattering are obtained, and a symmetry property for the partial phase\nshifts is derived. The amplitudes and cross-sections of the fermion-soliton\nscattering are obtained in an analytical form within the framework of the Born\napproximation, and the symmetry properties and asymptotic forms of the Born\namplitudes are investigated. The dependences of the first few partial phase\nshifts on the fermion momentum are obtained by numerical methods, and some of\ntheir properties are investigated and discussed.",
        "category": "hep"
    },
    {
        "text": "Three Roads to Probe-Brane Superconductivity: We study a defect system of two parallel D5 probe branes in a large-N_c D3\nbackground. Using the non-abelian DBI action, we study three different fields\nthat can give rise to a superconducting phase transition: A vector (p-wave), a\nscalar corresponding to a non-trivial \"separation\"' of the branes in the (3+1)\nfield theory directions and a scalar corresponding to a separation in the\n\"internal\" S^5 (both s-wave).\n  Comparing these phases first in the \\alpha'^2 expansion, we find that the\ninternal scalar has the largest critical temperature and is always\nthermodynamically preferred. Further, there is an interesting attractor\nbehavior.\n  Taking a simplified version of the full DBI action that preserves its\nregularity and geometry, we find that the divergences of the \\alpha'^2\nexpansion are resolved and some second order transitions turn into first order\nones. In addition to some other changes of the phase diagram due to the\nstructure of the DBI action, we observe that the ground state degeneracy of the\nunbroken theory is lifted. We also isolate the unphysical artifacts of our\nsimplification.",
        "category": "hep"
    },
    {
        "text": "Searches for B0 decays to eta K0, eta eta, eta' eta', eta phi, and eta'\n  phi: We search for B0 meson decays into two-body combinations of K0, eta, eta',\nand phi mesons in 324 million B Bbar pairs collected with the BaBar detector at\nthe PEP-II asymmetric-energy e+e- collider at SLAC. We measure the following\nbranching fractions (upper limits at 90% confidence level) in units of 10^{-6}:\nBr(B0->eta K0) =1.8+0.7-0.6 +-0.1(2.9), Br(B0->eta eta)=1.1+0.5-0.4 +-0.1(1.8),\nBr(B0->eta phi)=0.1+-0.2 +-0.1(0.6), Br(B0->eta' phi)=0.2+0.4-0.3 +-0.1(1.0),\nBr(B0->eta' eta')=1.0+0.8-0.6 +-0.1(2.4), where the first error is statistical\nand the second systematic.",
        "category": "hep"
    },
    {
        "text": "$P^\u039b_{\u03c8s}(4459)$ and $P^\u039b_{\u03c8s}(4338)$ as molecular\n  states in $ J/\u03c8\u039b$ invariant mass spectra: Recently, the LHCb Collaboration has reported two strange hidden-charm\npentaquark states named $P^\\Lambda_{\\psi s}(4459)$ and $P^\\Lambda_{\\psi\ns}(4338)$ in the $ J/\\psi \\Lambda$ invariant mass spectra of decays\n$\\Xi_b^-$$\\to$$ J/\\psi \\Lambda K^-$ and $B^-$$\\to$$J/\\psi \\Lambda\n\\bar{p}$,respectively. In this work, we perform a coupled-channel study of the\ninteractions $\\Xi_c^*\\bar{D}^*$, $\\Xi'_c\\bar{D}^*$, $\\Xi^*_c\\bar{D}$,\n$\\Xi_c\\bar{D}^*$, $\\Xi'_c\\bar{D}$, $\\Lambda_c\\bar{D}_s^{*}$, $\\Xi_c\\bar{D}$,\n$\\Lambda_c\\bar{D}_s$, and $\\Lambda J/\\psi$ in the quasipotential Bethe-Salpeter\nequation approach to estimate the $ J/\\psi \\Lambda$ invariant mass spectra.\nWith the help of effective Lagrangians, the potential kernel can be constructed\nby meson exchanges to obtain the scattering amplitudes, from which the poles of\nthe bound states and the invariant mass spectra can be reached. The\ncoupled-channel calculation results in that the width of state\n$\\Xi_c\\bar{D}^{*}(1/2^-)$ is about $18$~MeV and that of state\n$\\Xi_c\\bar{D}^{*}(3/2^-)$ is only about $1.6$~MeV. By comparison with\nexperimental data, it indicates that the structure $P^{\\Lambda}_{\\psi s}(4459)$\nis mainly from the contribution from the $\\Xi_c \\bar{D}^{*}(1/2^-)$ state while\nthe role of state $\\Xi_c \\bar{D}^{*}(3/2^-)$ cannot be excluded. The line shape\nof the structure $P^{\\Lambda}_{\\psi s}(4338)$ can be reproduced roughly by a\nnarrow molecular state from the $\\Xi_c \\bar{D}$ interaction with $J^P$=$1/2^-$,\nwhich is extremely close to the threshold, with a large interference effect.\nBesides, an additional state $\\Xi'_c \\bar{D}(1/2^-)$ is suggested to be\nobserved as a dip structure in the $J/\\psi \\Lambda$ invariant mass spectrum.",
        "category": "hep"
    },
    {
        "text": "Fate of Heavy Quark Bound States inside Quark-Gluon Plasma: Transport equations have been applied successfully to describe the quarkonium\nevolution inside the quark-gluon plasma, which include both plasma screening\neffects and recombination. We demonstrate how the quarkonium transport equation\nis derived from QCD by using the open quantum system framework and effective\nfield theory. Weak coupling and Markovian approximations used in the derivation\nare justified from a separation of scales. By solving the equations\nnumerically, we study the Upsilon production in heavy ion collisions.",
        "category": "hep"
    },
    {
        "text": "Discrete Symmetries from Broken $SU(N)$ and the MSSM: In order that discrete symmetries should not be violated by gravitational\neffects, it is necessary to gauge them. In this paper we discuss the gauging of\n$\\Z_N$ from the breaking of a high energy $SU(N)$ gauge symmetry, and derive\nconsistency conditions for the resulting discrete symmetry fr om the\nrequirement of anomaly cancellation in the parent symmetry. These results are\nthen applied to a detailed analysis of the possible discrete symmetries\nforbidding proton decay in the minimal supersymmetric standard model.",
        "category": "hep"
    },
    {
        "text": "Source terms for electroweak baryogenesis in the vev-insertion\n  approximation beyond leading order: In electroweak baryogenesis the baryon asymmetry of the universe is created\nduring the electroweak phase transition. The quantum transport equations\ngoverning the dynamics of the plasma particles can be derived in the\nvev-insertion approximation, which treats the vev-dependent part of the\nparticle masses as a perturbation. We calculate the next-to-leading order (NLO)\ncontribution to the CP-violating source term and CP-conserving relaxation rate,\ncorresponding to Feynman diagrams for the self-energies with four mass\ninsertions. We consider both a pair of Weyl fermions and a pair of complex\nscalars, that scatter off the bubble wall. We find: (i) The NLO correction\nbecomes large for $\\mathcal O(1)$ couplings. If only the Standard Model (SM)\nHiggs obtains a vev during the phase transition, this implies the vev-insertion\napproximation breaks down for top quarks. (ii) The resonant enhancement of the\nsource term and relaxation rate, that exists at leading order in the limit of\ndegenerate thermal masses for the fermions/scalars, persists at NLO.",
        "category": "hep"
    },
    {
        "text": "A possible hadronic excess in psi(2S) decay and rho-pi puzzle: We examine the so-called rho-pi puzzle of the psi(2S) decay by incorporating\ntwo inputs: One is the relative phase between the one-photon and the gluon\ndecay amplitude, and the other is a possible anomaly in the inclusive\nnonelectromagnetic decay rate of psi(2S). We propose the possibility that in\nthe psi(2S) decay a hadronic decay process of long distance origin is important\nin addition to the short-distance decay process. The amplitude of this\nadditional process should nearly cancel the three-gluon amplitude in the\nexclusive psi(2S)---> 1-0- and turn the sum dominantly real in contrast to the\nJ/psi decay. We present general consequences of this mechanism and then briefly\nlook into two models which possibly explain the course of this additional\namplitude.",
        "category": "hep"
    },
    {
        "text": "Quantum Anomalies, Running Vacuum and Leptogenesis: an Interplay: We discuss a connection between gravitational-wave physics, quantum theory\nanomalies, right-handed (sterile) neutrinos, (spontaneous) CPT Violation and\nLeptogenesis, within the framework of string-inspired cosmological models. In\nparticular, we present a scenario, according to which (primordial)\ngravitational waves induce gravitational anomalies during inflation. This, in\nturn, results in the existence of an undiluted (at the exit of\ninflation/beginning of radiation era) bakcground of the Kalb-Ramond (KR) axion\nof the massless bosonic string gravitational multiplet. The latter may violate\nspontaneously CP and CPT symmetries, and induce leptogenesis during the\nradiation-dominated era in models involving right-handed neutrinos. The\nso-generated lepton asymmetry may then be communicated to the baryon sector by\nappropriate baryon-minus-lepton-number (B - L)-conserving, but (B +\nL)-violating, (sphaleron) processes in the Standard Model sector, thus leading\nto matter dominance over antimatter in the Universe.In the current\n(approximately de Sitter) era, the KR axion background may provide a source for\nan axionic dark matter in the Universe, through its mixing with other axions\nthat are abundant in string models. As an interesting byproduct of our\nanalysis, we demonstrate that the anomalies contribute to the vacuum energy\ndensity of the Universe terms of 'running-vacuum' type, proportional to the\nsquare of the Hubble parameter, $H^2$.",
        "category": "hep"
    },
    {
        "text": "Testing the CP-violating MSSM in stau decays at the LHC and ILC: We study CP violation in the two-body decay of a scalar tau into a neutralino\nand a tau, which should be probed at the LHC and ILC. From the normal tau\npolarization, a CP asymmetry is defined which is sensitive to the CP phases of\nthe trilinear scalar coupling parameter $A_\\tau$, the gaugino mass parameter\n$M_1$, and the higgsino mass parameter $\\mu$ in the stau-neutralino sector of\nthe Minimal Supersymmetric Standard Model. Asymmetries of more than 70% are\nobtained in scenarios with strong stau mixing. As a result, detectable CP\nasymmetries in stau decays at the LHC are found, motivating further detailed\nexperimental studies for probing the SUSY CP phases.",
        "category": "hep"
    },
    {
        "text": "The Case for a Muon Collider Higgs Factory: We propose the construction of a compact Muon Collider Higgs Factory. Such a\nmachine can produce up to \\sim 14,000 at 8\\times 10^{31} cm^-2 sec^-1 clean\nHiggs events per year, enabling the most precise possible measurement of the\nmass, width and Higgs-Yukawa coupling constants.",
        "category": "hep"
    },
    {
        "text": "Search for New Hadronic Decays of $h_c$ and Observation of\n  $h_c\\rightarrow K^{+}K^{-}\u03c0^{+}\u03c0^{-}\u03c0^{0}$: Ten hadronic final states of the $h_c$ decays are investigated via the\nprocess $\\psi(3686)\\rightarrow \\pi^0 h_c$, using a data sample of $(448.1 \\pm\n2.9) \\times 10^6$ $\\psi(3686)$ events collected with the BESIII detector. The\ndecay channel $h_c\\rightarrow K^{+}K^{-}\\pi^{+}\\pi^{-}\\pi^{0}$ is observed for\nthe first time with a significance of $6.0 \\sigma$. The corresponding branching\nfraction is determined to be $\\mathcal{B}(h_c\\rightarrow\nK^{+}K^{-}\\pi^{+}\\pi^{-}\\pi^{0}) =(3.3 \\pm 0.6 \\pm 0.6)\\times 10^{-3}$ (the\nfirst uncertainty is statistical and the second systematical). Evidence for the\ndecays $h_c\\rightarrow \\pi^{+} \\pi^{-} \\pi^{0} \\eta$ and $h_c\\rightarrow\nK^{0}_{S}K^{\\pm}\\pi^{\\mp}\\pi^{+}\\pi^{-}$ is found with a significance of $3.6\n\\sigma$ and $3.8 \\sigma$, respectively. The corresponding branching fractions\n(and upper limits) are obtained to be $\\mathcal{B}(h_c\\rightarrow \\pi^{+}\n\\pi^{-} \\pi^{0} \\eta ) =(7.2 \\pm 1.8 \\pm 1.3)\\times 10^{-3}$ $(< 1.8 \\times\n10^{-2})$ and $\\mathcal{B}(h_c\\rightarrow\nK^{0}_{S}K^{\\pm}\\pi^{\\mp}\\pi^{+}\\pi^{-}) =(2.8 \\pm 0.9 \\pm 0.5)\\times 10^{-3}$\n$(<4.7\\times 10^{-3})$. Upper limits on the branching fractions for the final\nstates $h_c \\rightarrow K^{+}K^{-}\\pi^{0}$, $K^{+}K^{-}\\eta$,\n$K^{+}K^{-}\\pi^{+}\\pi^{-}\\eta$, $2(K^{+}K^{-})\\pi^{0}$,\n$K^{+}K^{-}\\pi^{0}\\eta$, $K^{0}_{S}K^{\\pm}\\pi^{\\mp}$, and\n$p\\bar{p}\\pi^{0}\\pi^{0}$ are determined at a confidence level of 90\\%.",
        "category": "hep"
    },
    {
        "text": "A New Class of Non-canonical Conformal Attractors for Multifield\n  Inflation: We propose a new broad class of multi-field non-canonical inflationary models\nas an extension of multi-field conformal cosmological attractors. This also\ngeneralizes the recently discovered class of non-canonical conformal attractors\nfor single field inflation. Kinetic terms of this class of models are\nphenomenologically arising from ${\\cal N}=1$ supergravity and from ${\\cal N}=1$\nsuperconformal theory, with two conformal scalar compensator fields in the\nlatter. We show that the inflationary dynamics and predictions of this class of\nmodels are stable with respect to the significant modification of both radial\nand angular part of the potential, but it is very sensitive to its minuscule\nmodification in the geometry of the field space metric. We also show that our\nframework can pass the latest observational constraints set by Planck 2018.",
        "category": "hep"
    },
    {
        "text": "$T\\bar{T}$ deformation of chiral bosons and Chern-Simons AdS$_3$ gravity: We study the $T\\bar{T}$ deformation of the chiral bosons and show the\nequivalence between the chiral bosons of opposite chiralities and the scalar\nfields at the Hamiltonian level under the deformation. We also derive the\ndeformed Lagrangian of more generic theories which contain an arbitrary number\nof chiral bosons to all orders. By using these results, we derive the\n$T\\bar{T}$ deformed boundary action of the AdS$_3$ gravity theory in the\nChern-Simons formulation. We compute the deformed one-loop torus partition\nfunction, which satisfies the $T\\bar{T}$ flow equation up to the one-loop\norder. Finally, we calculate the deformed stress tensor of a solution\ndescribing a BTZ black hole in the boundary theory, which coincides with the\nboundary stress tensor derived from the BTZ black hole with a finite cutoff.",
        "category": "hep"
    },
    {
        "text": "D-brane Spectrum and K-theory Constraints of D=4, N=1 Orientifolds: We study the spectrum of stable BPS and non-BPS D-branes in Z_2 x Z_2\norientifolds for all choices of discrete torsion between the orbifold and\norientifold generators. We compute the torsion K-theory charges in these D=4,\nN=1 orientifold models directly from worldsheet conformal field theory, and\ncompare with the K-theory constraints obtained indirectly using D-brane probes.\nThe K-theory torsion charges derived here provide non-trivial constraints on\nstring model building. We also discuss regions of stability for non-BPS\nD-branes in these examples.",
        "category": "hep"
    },
    {
        "text": "On supersymmetry algebra based on a spinor-vector generator: We study the unitary representation of supersymmetry (SUSY) algebra based on\na spinor-vector generator for both massless and massive cases. A systematic\nlinearization of nonlinear realization for the SUSY algebra is also discussed\nin the superspace formalism with a spinor-vector Grassmann coordinate.",
        "category": "hep"
    },
    {
        "text": "Modeling small dark energy scale with quintessential pseudoscalar boson: Democracy among the same type of particles is a useful paradigm in studying\nmasses and interactions of particles with supersymmetry(SUSY) or without SUSY.\nThis simple idea predicts the presence of massless particles. We attempt to use\none of these massless pseudoscalar particles as generating the cosmological\ndark energy(DE) potential. To achieve the extremely shallow potential of DE,\nthe pseudoscalar boson is required not to couple to the QCD anomaly. So, we\nconsider two pseudoscalars, one coupling to the QCD anomaly (i.e. QCD axion)\nand the other not coupling to the QCD anomaly. To obtain these two\npseudoscalars, we introduce two approximate global U(1) symmetries to realize\nthem as the pseudo-Goldstone bosons of the spontaneously broken U(1)'s. These\nglobal symmetries are dictated by a gravity respected discrete symmetry.\nSpecifically, we consider an S2(L) X S2(R) X Z(10R) example, and attempt to\nobtain the DE scale in terms of two observed fundamental mass scales, the grand\nunification scale M(G) and the electroweak scale v(ew).",
        "category": "hep"
    },
    {
        "text": "3D Supergravity from wrapped D3-branes: AdS_3 solutions dual to N = (0,2) SCFTs arise when D3-branes wrap Kahler\ntwo-cycles in manifolds with SU(4) holonomy. Here we review known AdS_3\nsolutions and identify the corresponding three-dimensional gauged\nsupergravities, solutions of which uplift to type IIB supergravity. In\nparticular, we discuss gauged supergravities dual to twisted compactifications\non Riemann surfaces of both N=4 SYM and N =1 SCFTs with Sasaki-Einstein duals.\nWe check in each case that c-extremization gives the exact central charge and R\nsymmetry. For completeness, we also study AdS_3 solutions from intersecting\nD3-branes, generalise recent KK reductions of Detournay & Guica and identify\nthe underlying gauged supergravities. Finally, we discuss examples of\nnull-warped AdS_3 solutions to three-dimensional gauged supergravity, all of\nwhich embed in string theory.",
        "category": "hep"
    },
    {
        "text": "QCD at Low Energies: The modern status of basic low energy QCD parameters is reviewed. It is\ndemonstrated, that the recent data allows one to determine the light quark mass\nratios with an accuracy 10-15%. The general analysis of vacuum condensates in\nQCD is presented, including those induced by external fields. The QCD coupling\nconstant alpha_s is found from the tau-lepton hadronic decay rate. V-A spectral\nfunctions of tau-decay are used for construction of the V-A polarization\noperator Pi_{V-A}(s) in the complex s-plane. The operator product expansion\n(OPE) is used up to dimension D=10 and the sum rules along the rays in the\ncomplex s-plane are constructed. The best values of quark condensate and\nalpha_s<0|qq|0>^2 are found. The value of quark condensate is confirmed by\nconsidering the sum rules for baryon masses. Gluon condensate is found in four\nways: by considering of V+A polarization operator based on the tau-decay data,\nby studying the sum rules for polarization operators momenta in charmonia in\nvector, pseudoscalar and axial channels. All of these determinations are in\nagreement and result in <(alpha_s/pi)G^2 > =0.005 \\pm 0.004 GeV^4. Valence\nquark distributions in proton are calculated in QCD using the OPE in proton\ncurrent virtuality. The quark distributions agree with those found from the\ndeep inelastic scattering data. The same value of gluon condensate is favoured.",
        "category": "hep"
    },
    {
        "text": "Asymptotic Structure of Einstein-Maxwell-Dilaton Theory and Its Five\n  Dimensional Origin: We consider Einstein-Maxwell-dilaton theory in four dimensions including the\nKaluza-Klein theory and obtain the general asymptotic solutions in Bondi gauge.\nWe find that there are three different types of news functions representing\ngravitational, electromagnetic, and scalar radiations. The mass density at any\nangle of the system can only decrease whenever there is any type of news\nfunction. The solution space of the Kaluza-Klein theory is also lifted to five\ndimensions. We also compute the asymptotic symmetries in both four dimensional\nEinstein-Maxwell-dilaton theory and five dimensional pure Einstein theory. We\nfind that the symmetry algebras of the two theories are the same.",
        "category": "hep"
    },
    {
        "text": "Possible influence of the two string events on the hadron formation in a\n  nuclear environment: One of the basic assumptions of the string model is that as a result of a DIS\nin nucleus a single string arises, which then breaks into hadrons. However the\npomeron exchange considered in this work, leads to the production of two\nstrings in the one event. The hadrons produced in these events have smaller\nformation lengths, than those with the same energy produced in the single\nstring events. As a consequence, they undergo more substantial absorption in\nthe nuclear matter.",
        "category": "hep"
    },
    {
        "text": "Nearly Degenerate Neutrino Masses and Nearly Decoupled Neutrino\n  Oscillations: We introduce a simple flavor symmetry breaking scheme, in which charged\nlepton masses have a strong hierarchy and neutrino masses are almost\ndegenerate. It is possible to obtain a natural suppression of lepton flavor\nmixing between the 1st and 3rd families as well as the approximate decoupling\nof atmospheric and solar neutrino oscillations with nearly bi-maximal mixing\nfactors. The similarity and difference between lepton and quark flavor mixing\nschemes are briefly discussed.",
        "category": "hep"
    },
    {
        "text": "Hairy black holes and holographic heat engine: By considering AdS charged black hole in the context of extended\nthermodynamic as the working substance we use it as a heat engine. We\ninvestigate the effect of hairy charge on the evolution of efficiency and\nCarnot efficiency along with electric charge. Because of interesting\nthermodynamic behavior of hairy black holes it would be natural to know their\neffects when we use black hole as a heat engine. We show that the hairy charge\nincreases the efficiency, and so maximum temperature would be happened for\nbigger Maxwell charge when this hairy charge grows. For the fixed electric\ncharges, the efficiency has a minimum value. In fact all critical points\ndescribe physical states except when the charge removed. If the electric charge\ntakes a zero value then the hairy charge must be negative. We also seek\nbehavior of the system for large charges which is provided a model with\nlow-temperature thermodynamics.",
        "category": "hep"
    },
    {
        "text": "Higgs Sector Motivations for an e-minus e-minus Linear Collider: I briefly review the crucial role an $\\emem$ linear collider could play in\nunravelling the nature of a non-minimal Higgs sector and/or\nstrongly-interacting $WW$ sector.",
        "category": "hep"
    },
    {
        "text": "Interpreting LHCb's $\u039b_b\\to \u039b_c\u03c4\\bar\u03bd$ measurement and\n  puzzles in semileptonic $\u039b_b$ decays: Normalizing the recent LHCb measurement of $\\Lambda_b \\to \\Lambda_c \\tau\n\\bar\\nu$ to the standard model (SM) prediction for the $\\Lambda_b \\to \\Lambda_c\n\\mu \\bar\\nu$ rate, instead of a LEP measurement, provides a more consistent\ncomparison with the SM prediction for the lepton flavor universality ratio\n$R(\\Lambda_c)$. This modestly increases $R(\\Lambda_c)$ compared to the quoted\nLHCb result, such that it no longer hints at a suppression compared to the SM,\nwhich would be hard to accommodate in new physics scenarios that enhance\n$R(D^{(*)})$. We point out that the fraction of excited states in inclusive\nsemileptonic $\\Lambda_b$ decay may be significantly greater than the\ncorresponding fraction in $B$ decays. Possible implications are speculated\nupon.",
        "category": "hep"
    },
    {
        "text": "Discussions on the Line-shape of $X(4660)$ Resonance: A careful reanalysis is made on $e^+e^-\\to X(4660)\\to\n(\\Lambda_c\\bar{\\Lambda}_c)/(\\psi'\\pi\\pi)$ processes, aiming at resolving the\napparent conflicts between Belle and BESIII data above\n$\\Lambda_c\\bar{\\Lambda}_c$ threshold. We use a model containing a Breit-Wigner\nresonance and $\\Lambda_c\\bar{\\Lambda}_c$ four-point contact interactions, with\nwhich the enhancement right above the $\\Lambda_c\\bar{\\Lambda}_c$ threshold is\nwell explained by a virtual pole generated by $\\Lambda_c\\bar{\\Lambda}_c$\nattractive final state interaction, located at $M_V=4.566\\pm0.007$ GeV.\nMeanwhile, $X(4660)$ remains to be a typical Breit-Wigner resonance, and is\nhence of confinement nature. Our analysis strongly suggests the existence of\nthe virtual pole with statistical significance of $4.2$ standard deviation\n($\\sigma$). Nevertheless, the conclusion crucially depends on the line-shape of\ncross sections which are of limited statistics, hence we urge new experimental\nanalyses from Belle II, BESIII, and LHCb to settle the issue.",
        "category": "hep"
    },
    {
        "text": "Light Higgsinos, Heavy Gluino and $b-\u03c4$ Quasi-Yukawa Unification:\n  Will the LHC find the Gluino?: A wide variety of unified models predict asymptotic relations at $M_{GUT}$\nbetween the b quark and $\\tau$ lepton Yukawa couplings. Within the framework of\nsupersymmetric SU(4) $\\times$ SU(2)$_L \\times$ SU(2)$_R$, we explore regions of\nthe parameter space that are compatible with b-$\\tau$ quasi-Yukawa unification\nand the higgsinos being the lightest supersymmetric particles ($\\lesssim$ 1\nTeV). Among the colored sparticles, the stop weighs more than 1.5 TeV or so,\nwhereas the squarks of the first two families are signifcantly heavier,\napproaching 10 TeV in some cases. The gluino mass is estimated to lie in the\n2-4 TeV range which raises the important question: Will the LHC find the\ngluino?",
        "category": "hep"
    },
    {
        "text": "DGP Specteroscopy: We systematically explore the spectrum of gravitational perturbations in\ncodimension-1 DGP braneworlds, and find a 4D ghost on the self-accelerating\nbranch of solutions. The ghost appears for any value of the brane tension,\nalthough depending on the sign of the tension it is either the helicity-0\ncomponent of the lightest localized massive tensor of mass $0<m^2 < 2H^2$ for\npositive tension, the scalar `radion' for negative tension, or their admixture\nfor vanishing tension. Because the ghost is gravitationally coupled to the\nbrane-localized matter, the self-accelerating solutions are not a reliable\nbenchmark for cosmic acceleration driven by gravity modified in the IR. In\ncontrast, the normal branch of solutions is ghost-free, and so these solutions\nare perturbatively safe at large distance scales. We further find that when the\n$\\mathbb{Z}_2$ orbifold symmetry is broken, new tachyonic instabilities, which\nare much milder than the ghosts, appear on the self-accelerating branch.\nFinally, using exact gravitational shock waves we analyze what happens if we\nrelax boundary conditions at infinity. We find that non-normalizable bulk\nmodes, if interpreted as 4D phenomena, may open the door to new ghost-like\nexcitations.",
        "category": "hep"
    },
    {
        "text": "Renormalization Theory for Interacting Crumpled Manifolds: We consider a continuous model of D-dimensional elastic (polymerized)\nmanifold fluctuating in d-dimensional Euclidean space, interacting with a\nsingle impurity via an attractive or repulsive delta-potential (but without\nself-avoidance interactions). Except for D=1 (the polymer case), this model\ncannot be mapped onto a local field theory. We show that the use of intrinsic\ndistance geometry allows for a rigorous construction of the high-temperature\nperturbative expansion and for analytic continuation in the manifold dimension\nD. We study the renormalization properties of the model for 0<D<2, and show\nthat for d<d* where d*=2D/(2-D) is the upper critical dimension, the\nperturbative expansion is UV finite, while UV divergences occur as poles at\nd=d*. The standard proof of perturbative renormalizability for local field\ntheories (the BPH theorem) does not apply to this model. We prove perturbative\nrenormalizability to all orders by constructing a subtraction operator based on\na generalization of the Zimmermann forests formalism, and which makes the\ntheory finite at d=d*. This subtraction operation corresponds to a\nrenormalization of the coupling constant of the model (strength of the\ninteraction with the impurity). The existence of a Wilson function, of an\nepsilon-expansion around the critical dimension, of scaling laws for d<d* in\nthe repulsive case, and of non-trivial critical exponents of the delocalization\ntransition for d>d* in the attractive case is thus established. To our\nknowledge, this provides the first proof of renormalizability for a model of\nextended objects, and should be applicable to the study of self-avoidance\ninteractions for random manifolds.",
        "category": "hep"
    },
    {
        "text": "Generalized Gaugino Condensation in Super Yang-Mills Theories: Discrete\n  R-Symmetries and Vacua: One can define generalized models of gaugino condensation as theories which\ndynamically break a discrete R-symmetry, but do not break supersymmetry. We\nconsider general examples consisting of gauge and matter fields, and the\nminimal number of gauge singlet fields to avoid flat directions in the\npotential. We explore which R-symmetries can arise, and their spontaneous\nbreaking. In general, we find that the discrete symmetry is\n$\\mathbb{Z}_{2b_0R}$ and the number of supersymmetric vacua is $b_0$, where\n$b_0$ is the coefficient of the one-loop beta function. Results are presented\nfor various groups, including $SU(N_c), SO(N_c), Sp(2N_c)$, and $G_2$, for\nvarious numbers of flavors, $N_f$, by several methods. This analysis can also\napply to the other exceptional groups, and thus all simple Lie groups. We also\ncomment on model building applications where a discrete R-symmetry, broken by\nthe singlet vevs, can account for $\\mu$-type terms and allow a realistic Higgs\nspectrum naturally.",
        "category": "hep"
    },
    {
        "text": "An Extended Colored Zee-Babu Model: We study the extended colored Zee-Babu model introducing a vector-like quark\nand singlet scalar. The active neutrino mass matrix and muon anomalous magnetic\nmoment are analyzed, which can be fitted to experimental data satisfying the\nconstraints from flavor changing neutral current. Then we discuss signature of\nour model via vector-like quark production. In addition, the diphoton excess\ncan be explained with the contribution from vector-like quark",
        "category": "hep"
    },
    {
        "text": "Dark Matter and Global Symmetries: General considerations in general relativity and quantum mechanics are known\nto potentially rule out continuous global symmetries in the context of any\nconsistent theory of quantum gravity. Assuming the validity of such\nconsiderations, we derive stringent bounds from gamma-ray, X-ray, cosmic-ray,\nneutrino, and CMB data on models that invoke global symmetries to stabilize the\ndark matter particle. We compute up-to-date, robust model-independent limits on\nthe dark matter lifetime for a variety of Planck-scale suppressed\ndimension-five effective operators. We then specialize our analysis and apply\nour bounds to specific models including the Two-Higgs-Doublet, Left-Right,\nSinglet Fermionic, Zee-Babu, 3-3-1 and Radiative See-Saw models. {Assuming that\n(i) global symmetries are broken at the Planck scale, that (ii) the\nnon-renormalizable operators mediating dark matter decay have $O(1)$ couplings,\nthat (iii) the dark matter is a singlet field, and that (iv) the dark matter\ndensity distribution is well described by a NFW profile}, we are able to rule\nout fermionic, vector, and scalar dark matter candidates across a broad mass\nrange (keV-TeV), including the WIMP regime.",
        "category": "hep"
    },
    {
        "text": "Extended Lambda-Maxwell duality and related large class of dyonic and\n  neutral exactly solvable 4D Einstein-Maxwell-dilaton models discovered: We report the discovered class of exact static solutions of several 4D\nEinstein-Maxwell-dilaton systems: string-induced, Liouville, trigonometric,\npolynomial, etc., for three basic topologies (spherical, hyperbolical and flat)\nbeing uniformly treated. In addition to the usual electric-magnetic duality\nthis class obeys a certain extended duality between Maxwell-dilaton coupling\nand dilaton mass. Though major solutions we obtain are dyonic, the class also\ncomprises interesting neutral models.\n  As a by-product, we significantly succeded in resolving of the two important\nproblems, one of which has been standing more than a decade (system with the\nstring-inspired exponential Maxwell-dilaton coupling and non-vanishing dilaton\nmass) and another one - gravity coupled to massive neutral scalar field:\ngeneralized Liouville, Sin(h), Cos(h) - is about fifty years old.\n  Finally, we demonstrate the full separability of the static EMD system and\npublicize the simple procedure of how to generate new integrability classes.",
        "category": "hep"
    },
    {
        "text": "Aspects of Three-dimensional Spin-4 Gravity: We discuss some interesting holographical aspects of three-dimensional\nhigher-spin gravity with a negative cosmological constant in the framework of\nSL(4, R) \\times SL(4, R) Chern-Simons theory. Using a recently found technique,\nwe construct explicitly a solution that can be interpreted as spin-4\ngeneralization of the BTZ solution, and demonstrate how W_4 symmetry and the\nhigher-spin Ward identities arise from the bulk equations of motion coupled to\nspin-3 and spin-4 currents. We match the eigenvalues of a Wilson loop along the\ntime-like direction of the BTZ to that of the spin-4 solution, and show that\nthis yields remarkably consistent gravitational thermodynamics for the latter.\nThis furnishes an important, concrete supporting example for a recent proposal\nto understand spacetime geometries in three-dimensional higher-spin gravity\nformulated via SL(N, R) \\times SL(N, R) Chern-Simons theories.",
        "category": "hep"
    },
    {
        "text": "Predicting the $\\sin\u03c6_S$ Transverse Single-spin Asymmetry of Pion\n  Production at an Electron Ion Collider: We study the transverse single-spin asymmetry with a $\\sin\\phi_S$ modulation\nin semi-inclusive deep inelastic scattering. Particularly, we consider the case\nin which the transverse momentum of the final state hadron is integrated out.\nThus, the asymmetry is merely contributed by the coupling of the transversity\ndistribution function $h_1(x)$ and the twist-3 collinear fragmentation function\n$\\tilde{H}(z)$. Using the available parametrization of $h_1(x)$ from SIDIS data\nand the recent extracted result for $\\tilde{H}(z)$, we predict the $\\sin\\phi_S$\nasymmetry for charged and neutral pion production at an Electron Ion Collider.\nWe find that the asymmetry is sizable and could be measured. We also study the\nimpact of the leading-order QCD evolution effect and find that it affects the\n$\\sin\\phi_S$ asymmetry at EIC considerably.",
        "category": "hep"
    },
    {
        "text": "The Skyrmion strikes back: baryons and a new large $N_c$ limit: In the large $N_c$ limit of QCD, baryons can be modeled as solitons, for\ninstance, as Skyrmions. This modeling has been justified by Witten's\ndemonstration that all properties of baryons and mesons scale with $N_c^{-1/2}$\nin the same way as the analogous meson-based soliton model scales with a\ngeneric meson-meson coupling constant $g$. An alternative large $N_c$ limit\n(the orientifold large $N_c$ limit) has recently been proposed in which quarks\ntransform in the two-index antisymmetric representation of $SU(N_c)$. By\ncarrying out the analog of Witten's analysis for the new orientifold large\n$N_c$ limit, we show that baryons and solitons can also be identified in the\norientifold large $N_c$ limit. However, in the orientifold large $N_c$ limit,\nthe interaction amplitudes and matrix elements scale with $N_c^{-1}$ in the\nsame way as soliton models scale with the generic meson coupling constant $g$\nrather than as $N_c^{-1/2}$ as in the traditional large $N_c$ limit.",
        "category": "hep"
    },
    {
        "text": "Radiative Two Loop Inverse Seesaw and Dark Matter: Seesaw mechanism provides a natural explanation of light neutrino masses\nthrough suppression of heavy seesaw scale. In inverse seesaw models the seesaw\nscale can be much lower than that in the usual seesaw models. If terms inducing\nseesaw masses are further induced by loop corrections, the seesaw scale can be\nlowered to be in the range probed by experiments at the LHC without fine\ntuning. In this paper we construct models in which inverse seesaw neutrino\nmasses are generated at two loop level. These models also naturally have dark\nmatter candidates. Although the recent data from Xenon100 put stringent\nconstraint on the models, they can be consistent with data on neutrino masses,\nmixing, dark matter relic density and direct detection. These models also have\nsome interesting experimental signatures for collider and flavor physics.",
        "category": "hep"
    },
    {
        "text": "Spectral function of the Bloch-Nordsieck model at finite temperature: In this paper we determine the exact fermionic spectral function of the\nBloch-Nordsieck model at finite temperature. Analytic results are presented for\nsome special parameters, for other values we have numerical results. The\nspectral function is finite and normalizable for any nonzero temperature\nvalues. The real time dependence of the retarded Green's function is power-like\nfor small times and exhibits exponential damping for large times. Treating the\ntemperature as an infrared regulator, we can also give a safe interpretation of\nthe zero temperature result.",
        "category": "hep"
    },
    {
        "text": "Predicting $\\sin(2\u03c6-\u03c6_{s})$ azimuthal asymmetry in pion-proton\n  induced Drell-Yan process using holographic light-front QCD: We compute the $\\sin(2\\phi-\\phi_{s})$ azimuthal asymmetry in the pion-nucleon\ninduced Drell-Yan process within transverse momentum dependent factorization.\nWe employ the holographic light-front pion wave functions to calculate its\nleading-twist transverse momentum dependent parton distributions (TMDs). The\nBoer-Mulders TMD of the pion is then convoluted with the transversity TMD of\nthe proton evaluated in a light-front quark-diquark model constructed with the\nwave functions predicted by the soft-wall AdS/QCD to obtain the azimuthal\nasymmetry in the Drell-Yan process. The gluon rescattering is pivotal to\npredict nonzero pion Boer-Mulders TMD. We investigate the utility of a\nnonperturbative SU$(3)$ gluon rescattering kernel going beyond the usual\napproximation of perturbative U$(1)$ gluons. The holographic light-front QCD\napproach provides a powerful tool for exploring the role of nonperturbative QCD\neffects in the Drell-Yan process and may help to guide future experimental\nmeasurements.",
        "category": "hep"
    },
    {
        "text": "Calculating the Rest Tension for a Polymer of String Bits: We explore the application of approximation schemes from many body physics,\nincluding the Hartree-Fock method and random phase approximation (RPA), to the\nproblem of analyzing the low energy excitations of a polymer chain made up of\nbosonic string bits. We accordingly obtain an expression for the rest tension\n$T_0$ of the bosonic relativistic string in terms of the parameters\ncharacterizing the microscopic string bit dynamics. We first derive an exact\nconnection between the string tension and a certain correlation function of the\nmany-body string bit system. This connection is made for an arbitrary\ninteraction potential between string bits and relies on an exact dipole sum\nrule. We then review an earlier calculation by Goldstone of the low energy\nexcitations of a polymer chain using RPA. We assess the accuracy of the RPA by\ncalculating the first order corrections. For this purpose we specialize to the\nunique scale invariant potential, namely an attractive delta function potential\nin two (transverse) dimensions. We find that the corrections are large, and\ndiscuss a method for summing the large terms. The corrections to this improved\nRPA are roughly 15\\%.",
        "category": "hep"
    },
    {
        "text": "S-wave nonleptonic hyperon decays and $\u039e^-_b \\to \u03c0^- \u039b_b$: The decay $\\Xi^-_b \\to \\pi^- \\Lambda_b$ has recently been observed by the\nLHCb Collaboration at CERN. In contrast to most weak decays of $b$-flavored\nbaryons, this process involves the decay of the strange quark in $\\Xi_b$, and\nthus has features in common with nonleptonic weak decays of hyperons. Thanks to\nthe expected pure S-wave nature of the decay in question in the heavy $b$ quark\nlimit, we find that its amplitude may be related to those for S-wave\nnonleptonic decays of $\\Lambda$, $\\Sigma$, and $\\Xi$ in a picture inspired by\nduality. The calculated branching fraction ${\\cal B}(\\Xi^-_b \\to \\pi^-\n\\Lambda_b) = (6.3 \\pm 4.2) \\times 10^{-3}$ is consistent with the range allowed\nin the LHCb analysis. The error is dominated by an assumed 30\\% uncertainty in\nthe amplitude due to possible U(3) violation. A more optimistic view based on\nsum rules involving nonleptonic hyperon decay S-wave amplitudes reduces the\nerror on the branching fraction to $2.0 \\times 10^{-3}$.",
        "category": "hep"
    },
    {
        "text": "Neutrino masses, dark matter and leptogenesis with $U(1)_{B-L}$ gauge\n  symmetry: We propose a model with an $U(1)_{B-L}$ gauge symmetry, in which small\nneutrino masses, dark matter and the matter-antimatter asymmetry in the\nUniverse can be simultaneously explained. In particular, the neutrino masses\nare generated radiatively, while the matter-antimatter asymmetry is led by the\nleptogenesis mechanism, at TeV scale. We also explore allowed regions of the\nmodel parameters and discuss some phenomenological effects including lepton\nflavor violating processes.",
        "category": "hep"
    },
    {
        "text": "Lorentz Invariance, Scattering Amplitudes and the Emergence of\n  Semiclassical Geometry: It has been known for some time now that error correction plays a fundamental\nrole in the determining the emergence of semiclassical geometry in quantum\ngravity. In this work I connect several different lines of reasoning to argue\nthat this should indeed be the case. The kinematic data which describes the\nscattering of $ N $ massless particles in flat spacetime can put in one-to-one\ncorrespondence with coherent states of quantum geometry. These states are\nlabeled by points in the Grassmannian $ Gr_{2,n} $, which can be viewed as\nlabeling the code-words of a quantum error correcting code. The condition of\nLorentz invariance of the background geometry can then be understood as the\nrequirement that co-ordinate transformations should leave the code subspace\nunchanged. In this essay I show that the language of subsystem (or operator)\nquantum error correcting codes provides the proper framework for understanding\nthese aspects of particle scattering and quantum geometry.",
        "category": "hep"
    },
    {
        "text": "Deep generative models for fast photon shower simulation in ATLAS: The need for large-scale production of highly accurate simulated event\nsamples for the extensive physics programme of the ATLAS experiment at the\nLarge Hadron Collider motivates the development of new simulation techniques.\nBuilding on the recent success of deep learning algorithms, variational\nautoencoders and generative adversarial networks are investigated for modelling\nthe response of the central region of the ATLAS electromagnetic calorimeter to\nphotons of various energies. The properties of synthesised showers are compared\nwith showers from a full detector simulation using GEANT4. Both variational\nautoencoders and generative adversarial networks are capable of quickly\nsimulating electromagnetic showers with correct total energies and\nstochasticity, though the modelling of some shower shape distributions requires\nmore refinement. This feasibility study demonstrates the potential of using\nsuch algorithms for ATLAS fast calorimeter simulation in the future and shows a\npossible way to complement current simulation techniques.",
        "category": "hep"
    },
    {
        "text": "On the nature of fermion-monopole supersymmetry: It is shown that the generator of the nonstandard fermion-monopole\nsupersymmetry uncovered by De Jonghe, Macfarlane, Peeters and van Holten, and\nthe generator of its standard N=1/2 supersymmetry have to be supplemented by\ntheir product operator to be treated as independent supercharge. As a result,\nthe fermion-monopole system possesses the nonlinear N=3/2 supersymmetry having\nthe nature of the 3D spin-1/2 free particle's supersymmetry generated by the\nsupercharges represented in a scalar form. Analyzing the supercharges'\nstructure, we trace how under reduction of the fermion-monopole system to the\nspherical geometry the nonlinear N=3/2 superalgebra comprising the Hamiltonian\nand the total angular momentum as even generators is transformed into the\nstandard linear N=1 superalgebra with the Hamiltonian to be the unique even\ngenerator.",
        "category": "hep"
    },
    {
        "text": "Noncommutative corrections to the minimal surface areas of the pure AdS\n  spacetime and Schwarzschild-AdS black hole: Based on the perturbation expansion, we compute the noncommutative\ncorrections to the minimal surface areas of the pure AdS spacetime and\nSchwarzschild-AdS black hole, where the noncommutative background is suitably\nconstructed in terms of the Poincar\\'e coordinate system. In particular, we\nfind a reasonable tetrad with subtlety, which not only matches the metrics of\nthe pure AdS spacetime and Schwarzschild-AdS black hole in the commutative\ncase, but also makes the corrections real rather than complex in the\nnoncommutative case. For the pure AdS spacetime, the nocommutative effect is\nonly a logarithmic term, while for the Schwarzschild-AdS black hole, it\ncontains a logarithmic contribution plus both a mass term and a noncommutative\nparameter related term. Furthermore, we show that the holographic entanglement\nentropy with noncommutativity obeys a relation which is similar to the first\nlaw of thermodynamics in the pure AdS spacetime.",
        "category": "hep"
    },
    {
        "text": "Calculation of Green-Schwarz Superstring Amplitudes Using the N=2\n  Twistor-String Formalism: The manifestly SU(4)xU(1) super-Poincare invariant free-field N=2 twistor-\nstring action for the ten-dimensional Green-Schwarz superstring is quantized\nusing standard BRST methods. Unlike the light-cone and semi-light-cone\ngauge-fixed Green-Schwarz actions, the twistor-string action does not require\ninteraction-point operators at the zeroes of the light-cone momentum, $\\dz\nx^+$, which complicated all previous calculations. After defining the vertex\noperator for the massless physical supermultiplet, as well as two\npicture-changing operators and an instanton-number-changing operator,\nscattering amplitudes for an arbitrary number of loops and external massless\nstates are explicitly calculated by evaluating free-field correlation functions\nof these operators on N=2 super-Riemann surfaces of the appropriate topology,\nand integrating over the global moduli. Although there is no sum over spin\nstructures, only discrete values of the global U(1) moduli contribute to the\namplitudes. Because the spacetime supersymmetry generators do not contain ghost\nfields, the amplitudes are manifestly spacetime supersymmetric, there is no\nmultiloop ambiguity, and the non-renormalization theorem is easily proven. By\nchoosing the picture-changing operators to be located at the zeroes of $\\dz\nx^+$, these amplitudes are shown to agree with amplitudes obtained using the\nmanifestly unitary light-cone gauge formalism.",
        "category": "hep"
    },
    {
        "text": "BV QUANTIZATION OF A VECTOR-TENSOR GAUGE THEORY WITH TOPOLOGICAL\n  COUPLING: We use the BV quantization method for a theory with coupled tensor and vector\ngauge fields through a topological term. We consider in details the\nreducibility of the tensorial sector as well as the appearance of a mass term\nin the effective vectorial theory .",
        "category": "hep"
    },
    {
        "text": "Composite electric S-brane solutions with maximal number of branes and\n  several scalar fields: A (n+1)-dimensional cosmological model with a set of scalar fields and\nantisymmetric (p+2)-form is considered. Some of scalar fields may have negative\nkinetic terms, i.e. they may describe ``phantom'' fields. For certain odd\ndimensions (D = 4m+1 = 5, 9, 13, ...) and (p+2)-forms (p = 2m-1 = 1, 3, 5, ...)\nand non-exceptional dilatonic coupling vector $\\vec{\\lambda}$ we obtain\ncosmological-type solutions to the field equations. These solutions are\ncharacterized by self-dual or anti-self-dual charge density forms Q (of rank\n2m) and may describe the maximal set of branes (i.e. when all the branes have\nnon-zero charge densities). Some properties of these solutions are considered,\ne.g. Kasner-like behavior, the existence of non-singular (e.g. bouncing)\nsolutions and those with acceleration. The solutions with bouncing and\nacceleration take place when at least there is one ``phantom'' field in the\nmodel.",
        "category": "hep"
    },
    {
        "text": "The Dynamical Composite Higgs: We present a simple microscopic realization of a pseudo-Nambu-Goldstone\n(pNGB) boson Higgs scenario arising from the breaking of $SO(5) \\rightarrow\nSO(4)$. The Higgs constituents are explicitly identified as well as the\ninteractions responsible for forming the bound state and breaking the\nelectroweak symmetry. This outcome follows from the presence of four-fermion\ninteractions with a super-critical coupling, and uses the Nambu-Jona-Lasinio\nmechanism to break the global $SO(5)$ symmetry. The Higgs potential is found to\nbe insensitive to high energy scales due to the existence of an approximate\ninfrared fixed point. The appearance of vector resonances is described and the\ncorrespondence with other proposals in the literature established. The model\ndescribed here is significantly simpler than other recent ultraviolet\ncompletions of pNGB scenarios. The observed Higgs mass can be accommodated, and\nagreement with electroweak precision tests achieved in certain regions of\nparameter space. There are also new vector-like fermions, some of which may lie\nwithin reach of the LHC. In addition, we predict a heavy standard model singlet\nscalar in the multi-TeV range. The amount of fine-tuning required in the model\nis studied. Finally, we show that such a scheme can be completed in the\nultraviolet by a renormalizable theory.",
        "category": "hep"
    },
    {
        "text": "JUNIPR: a Framework for Unsupervised Machine Learning in Particle\n  Physics: In applications of machine learning to particle physics, a persistent\nchallenge is how to go beyond discrimination to learn about the underlying\nphysics. To this end, a powerful tool would be a framework for unsupervised\nlearning, where the machine learns the intricate high-dimensional contours of\nthe data upon which it is trained, without reference to pre-established labels.\nIn order to approach such a complex task, an unsupervised network must be\nstructured intelligently, based on a qualitative understanding of the data. In\nthis paper, we scaffold the neural network's architecture around a\nleading-order model of the physics underlying the data. In addition to making\nunsupervised learning tractable, this design actually alleviates existing\ntensions between performance and interpretability. We call the framework\nJUNIPR: \"Jets from UNsupervised Interpretable PRobabilistic models\". In this\napproach, the set of particle momenta composing a jet are clustered into a\nbinary tree that the neural network examines sequentially. Training is\nunsupervised and unrestricted: the network could decide that the data bears\nlittle correspondence to the chosen tree structure. However, when there is a\ncorrespondence, the network's output along the tree has a direct physical\ninterpretation. JUNIPR models can perform discrimination tasks, through the\nstatistically optimal likelihood-ratio test, and they permit visualizations of\ndiscrimination power at each branching in a jet's tree. Additionally, JUNIPR\nmodels provide a probability distribution from which events can be drawn,\nproviding a data-driven Monte Carlo generator. As a third application, JUNIPR\nmodels can reweight events from one (e.g. simulated) data set to agree with\ndistributions from another (e.g. experimental) data set.",
        "category": "hep"
    },
    {
        "text": "Generalized Q-Exponentials Related to Orthogonal Quantum Groups and\n  Fourier Transformations of Noncommutative Spaces: An essential prerequisite for the study of q-deformed physics are particle\nstates in position and momentum representation. In order to relate x- and\np-space by Fourier transformations the appropriate q-exponential series related\nto orthogonal quantum symmetries is constructed. It turns out to be a new\nq-special function giving rise to q-plane wave solutions that transform with a\nnoncommuting phase under translations.",
        "category": "hep"
    },
    {
        "text": "Gauge- and point-invariant vertices of nucleon-to-resonance interactions: We construct interactions of nucleons N with higher-spin resonances R\ninvariant under point and gauge transformations of the Rarita-Schwinger field.\nIt is found for arbitrarily high spin of a resonance that the requirement of\npoint- and gauge-invariance uniquely determines a Lagrangian of NR interactions\nwith pions, photons, and vector mesons, which might reduce model ambiguity in\neffective-field calculations involving such vertices. Considering the NR\ninteractions with photons and vector mesons, the symmetry provides a\nclassification of three NR vertices in terms of their differential order. The\nQ^2 dependencies of the point and gauge invariant form factors are considered\nin a vector-meson-dominance model. The model is in good agreement with\nexperimental data. In addition, we point out some empirical patterns in the Q^2\ndependencies of the form factors: low-Q^2 scaling of the N-Delta(1232) form\nfactor ratios and relations between form factors for N-N(1520) and N-N(1680)\ntransitions.",
        "category": "hep"
    },
    {
        "text": "Cosmological Constraints on Large Extra Dimensions: We calculate the production of massive Kaluza-Klein(KK) modes via\nnucleon-nucleon gravi-bremsstrahlung in the early universe. Overproduction of\nthese states would result in early matter domination and therefore a low age\nfor the universe so it is possible to place constraints on the number and size\nof large extra dimensions. The constraints are stronger than those from Sn1987a\n- for 2 large extra dimensions and T_QCD=170 MeV, we show the fundamental scale\nmust be larger than 1,000 TeV.",
        "category": "hep"
    },
    {
        "text": "Zero mode-soliton duality and pKdV kinks in Boussinesq system for\n  non-linear shallow water waves: A Boussinesq system for a non-linear shallow water is considered. The\nnonlinear and topological effects are examined through an associated matrix\nspectral problem. It is shown an equivalence relationship between the bound\nstates and topological soliton charge densities which resembles a formula of\nthe Atiyah-Patodi-Singer-type index theorem. The zero mode components describe\na topologically protected Kelvin wave of KdV-type and a novel Boussinesq-type\nfield. We show that either the $1+1$ dimensional pKdV kink or the Kelvin mode\ncan be mapped to the bulk velocity potential in $2+1$ dimensions.",
        "category": "hep"
    },
    {
        "text": "Scale Anomalies, States, and Rates in Conformal Field Theory: This paper presents two methods to compute scale anomaly coefficients in\nconformal field theories (CFTs), such as the c anomaly in four dimensions, in\nterms of the CFT data. We first use Euclidean position space to show that the\nanomaly coefficient of a four-point function can be computed in the form of an\noperator product expansion (OPE), namely a weighted sum of OPE coefficients\nsquared. We compute the weights for scale anomalies associated with scalar\noperators and show that they are not positive. We then derive a different sum\nrule of the same form in Minkowski momentum space where the weights are\npositive. The positivity arises because the scale anomaly is the coefficient of\na logarithm in the momentum space four-point function. This logarithm also\ndetermines the dispersive part, which is a positive sum over states by the\noptical theorem. The momentum space sum rule may be invalidated by UV and/or IR\ndivergences, and we discuss the conditions under which these singularities are\nabsent. We present a detailed discussion of the formalism required to compute\nthe weights directly in Minkowski momentum space. A number of explicit checks\nare performed, including a complete example in an 8-dimensional free field\ntheory.",
        "category": "hep"
    },
    {
        "text": "Heavy quark induced effective action for gauge fields in the SU(N_c) x\n  U(1) model and the low-energy structure of heavy quark current correlators: We calculate the low-energy limit of heavy quark current correlators within\nan expansion in the inverse heavy quark mass. The induced low-energy currents\nbuilt from the gluon fields corresponding to the initial heavy quark currents\nare obtained from an effective action for gauge fields in the one-loop\napproximation at the leading order of the 1/m expansion. Explicit formulae for\nthe low-energy spectra of electromagnetic and tensor heavy quark current\ncorrelators are given. Consequences of the appearance of a nonvanishing\nspectral density below the two-particle threshold for high precision\nphenomenology of heavy quarks are discussed quantitatively.",
        "category": "hep"
    },
    {
        "text": "$\u03c3$ exchange in the one-boson exchange model involving the ground\n  state octet baryons: Based on the one-boson-exchange framework that the $\\sigma$ meson serves as\nan effective parameterization for the correlated scalar-isoscalar $\\pi\\pi$\ninteraction, we calculate the coupling constants of the $\\sigma$ to the\n$\\frac{1}{2}^+$ ground state light baryon octet ${\\mathbb B}$ by matching the\namplitude of ${\\mathbb B}\\bar{{\\mathbb B}}\\to\\pi\\pi\\to\\bar{{\\mathbb B}}{\\mathbb\nB}$ to that of ${\\mathbb B}\\bar{{\\mathbb B}}\\to\\sigma\\to\\bar{{\\mathbb\nB}}{\\mathbb B}$. The former is calculated using a dispersion relation,\nsupplemented with chiral perturbation theory results for the ${\\mathbb\nB}{\\mathbb B}\\pi\\pi$ couplings and the Muskhelishvili-Omn\\` es representation\nfor the $\\pi\\pi$ rescattering. Explicitly, the coupling constants are obtained\nas $g_{NN\\sigma}=8.7_{-1.9}^{+1.7}$,\n$g_{\\Sigma\\Sigma\\sigma}=3.5_{-1.3}^{+1.8}$,\n$g_{\\Xi\\Xi\\sigma}=2.5_{-1.4}^{+1.5}$, and\n$g_{\\Lambda\\Lambda\\sigma}=6.8_{-1.7}^{+1.5}$. These coupling constants can be\nused in the one-boson-exchange model calculations of the interaction of light\nbaryons with other hadrons.",
        "category": "hep"
    },
    {
        "text": "Slow Roll during the Waterfall Regime: The Small Coupling Window for\n  SUSY Hybrid Inflation: It has recently been pointed out that a substantial amount of e-folds can\noccur during the waterfall regime of hybrid inflation. Moreover, Kodama et.al.\nhave derived analytic approximations for the trajectories of the inflaton and\nof the waterfall fields. Based on these, we derive here the consequences for F-\nand D-term SUSY hybrid inflation: A substantial amount of e-folds may occur in\nthe waterfall regime, provided kappa << M^2/M_P^2, where kappa is the\nsuperpotential coupling, M the scale of symmetry breaking and M_P the reduced\nPlanck mass. When this condition is amply fulfilled, a number of e-folds much\nlarger than N_e\\approx60 can occur in the waterfall regime and the scalar\nspectral index is then given by the expression found by Kodama et.al.\nn_s=1-4/N_e. This value may be increased up to unity, if only about N_e e-folds\noccur during the waterfall regime, such that the largest observable scale\nleaves the horizon close to the critical point of hybrid inflation, what can be\nachieved for kappa\\approx10^(-13) and M\\approx5x10^(12) GeV in F-term\ninflation. Imposing the normalization of the power spectrum leads to a lower\nbound on the scale of symmetry breaking.",
        "category": "hep"
    },
    {
        "text": "Lorentzian quantum gravity and the graviton spectral function: We present the first direct and non-perturbative computation of the graviton\nspectral function in quantum gravity. This is achieved with the help of a novel\nLorentzian renormalisation group approach, combined with a spectral\nrepresentation of correlation functions. We find a positive graviton spectral\nfunction, showing a massless one-graviton peak and a multi-graviton continuum\nwith an asymptotically safe scaling for large spectral values. We also study\nthe impact of a cosmological constant. Further steps to investigate scattering\nprocesses and unitarity in asymptotically safe quantum gravity are indicated.",
        "category": "hep"
    },
    {
        "text": "A Double Take on New Physics in Double Higgs Production: Gluon-initiated double Higgs production is the most important channel to\nextract the Higgs self-coupling at hadron colliders. However, new physics could\nenter into this channel in several distinctive ways including, but not limited\nto, the Higgs self-coupling, a modified top Yukawa coupling, and an anomalous\nHiggs-top quartic coupling. In this work we initiate a study on the interplay\nof these effects in the kinematic distributions of the Higgs bosons. More\nspecifically, we divide the transverse momentum and the total invariant mass\nspectra into two bins and use the differential rates in each bin to constrain\nthe magnitude of the aforementioned effects. Significantly improved results\ncould be obtained over those using total cross section alone. However, some\ndegeneracy remains, especially in the determination of the Higgs trilinear\ncoupling. Therefore, an accurate measurement of the Higgs self-coupling in this\nchannel would require precise knowledge of the magnitudes of other new physics\neffects. We base our analysis on a future 100 TeV proton-proton collider.",
        "category": "hep"
    },
    {
        "text": "Classification of lepton mixing patterns from finite flavour symmetries: Flavour symmetries have been used to constrain both quark and lepton mixing\nparameters. In particular, they can be used to completely fix the mixing\nangles. For the lepton sector, assuming that neutrinos are Majorana particles,\nwe have derived the complete list of mixing patterns achievable in this way, as\nwell as the symmetry groups associated to each case. Partial computer scans\ndone in the past have hinted that such list is limited, and this does indeed\nturn out to be the case. In addition, most mixing patterns are already 3-sigma\nexcluded by neutrino oscillation data.",
        "category": "hep"
    },
    {
        "text": "Search for neutrino non-standard interactions with ANTARES and\n  KM3NeT-ORCA: Non-standard interactions (NSIs) in the propagation of neutrinos in matter\ncan lead to significant deviations in neutrino oscillations expected within the\nstandard 3-neutrino framework. These additional interactions would result in an\nanomalous flux of neutrinos observable at neutrino telescopes. The ANTARES\ndetector and its next-generation successor, KM3NeT, located in the abyss of the\nMediterranean Sea, have the potential to measure sub-dominant effects in\nneutrino oscillations, coming from non-standard neutrino interactions. In this\ncontribution, a likelihood-based search for NSIs with 10 years of atmospheric\nmuon-neutrino data recorded with ANTARES is reported and sensitivity\nprojections for KM3NeT/ORCA, based on realistic detector simulations, are\nshown. The bounds obtained with ANTARES in the NSI $\\mu - \\tau$ sector\nconstitute the most stringent limits up to date.",
        "category": "hep"
    },
    {
        "text": "On Gauge Invariant Cosmological Perturbations in UV-modified Horava\n  Gravity: We consider gauge invariant cosmological perturbations in UV-modified, z=3\nHorava gravity with one scalar matter field, which has been proposed as a\nrenormalizable gravity theory without the ghost problem in four dimensions. In\norder to exhibit its dynamical degrees of freedom, we consider the Hamiltonian\nreduction method and find that, by solving \"all\" the constraint equations, the\ndegrees of freedom are the same as those of Einstein gravity: One scalar and\ntwo tensor (graviton) modes when a scalar matter field presents. However, we\nconfirm that there is no extra graviton modes and general relativity is\nrecovered in IR, which achieves the consistency of the model. From the\nUV-modification terms which break the detailed balance condition in UV, we\nobtain scale-invariant power spectrums for \"non\"-inflationary backgrounds, like\nthe power-law expansions, without knowing the details of early expansion\nhistory of Universe. This could provide a new framework for the Big Bang\ncosmology. Moreover, we find that \"tensor and scalar fluctuations travel\ndifferently in UV, generally\". We present also some clarifying remarks about\nconfusing points in the literatures.",
        "category": "hep"
    },
    {
        "text": "Displaced or invisible? ALPs from $B$ decays at Belle II: At colliders, neutral long-lived particles can be detected through displaced\ndecay products or as missing energy. Which search strategy is better depends on\nthe particle's decay length just as on the detector properties. We investigate\nthe complementarity of displaced and invisible signatures for the Belle II\nexperiment. Focusing on axion-like particles $a$ produced from meson decays, we\npresent a new search strategy for two-body decays $B^+ \\to K^+ a, a\\to\nE\\!\\!\\!/$ with missing energy $E\\!\\!\\!/$. With $50\\,$ab$^{-1}$ of data, Belle\nII can probe light invisible resonances with branching ratio\n$\\mathcal{B}(B^+\\to K^+ a) \\gtrsim 10^{-7}$ and decay length $c\\tau_a \\gtrsim\n1\\,$m. For axion-like particles, we expect the sensitivity of $B^+ \\to K^+\nE\\!\\!\\!/$ to small couplings to improve by up to two orders of magnitude\ncompared to previous searches at collider and fixed-target experiments. For\nsub-GeV particles, $B^+ \\to K^+ E\\!\\!\\!/$ at Belle II and searches at beam-dump\nexperiments are most sensitive; for heavier particles, searches for displaced\nvertices at Belle II, long-lived particle experiments at the LHC, and future\nfixed-target experiments can probe the smallest couplings.",
        "category": "hep"
    },
    {
        "text": "Energy Spectrum of Anyons in a Magnetic Field: For the many-anyon system in external magnetic field, we derive the energy\nspectrum as an exact solution of the quantum eigenvalue problem with particular\ntopological constraints. Our results agree with the numerical spectra recently\nobtained for the 3- and the 4-anyon systems.",
        "category": "hep"
    },
    {
        "text": "Mirror Symmetry, D-brane Superpotential and Ooguri-Vafa Invariants of\n  Compact Calabi-Yau Manifolds: The D-brane superpotential is very important in the low energy effective\ntheory. As the generating function of all disk instantons from the worldsheet\npoint of view, it plays a crucial role in deriving some important properties of\nthe compact Calabi-Yau manifolds. By using the GKZ-generalized hypergeometric\nsystem, we will calculate the B-brane superpotentials of two non-fermat type\ncompact Calabi-Yau hypersurfaces in toric varieties,respectively. Then\naccording to the mirror symmetry, we obtain the A-model superpotentials and the\nOoguri-Vafa invariants for the mirror Calabi-Yau manifolds.",
        "category": "hep"
    },
    {
        "text": "Probing Transverse Momentum Broadening via Dihadron and Hadron-jet\n  Angular Correlations in Relativistic Heavy-ion Collisions: Dijet, dihadron, hadron-jet angular correlations have been reckoned as\nimportant probes of the transverse momentum broadening effects in relativistic\nnuclear collisions. When a pair of high-energy jets created in hard collisions\ntraverse the quark-gluon plasma produced in heavy-ion collisions, they become\nde-correlated due to the vacuum soft gluon radiation associated with the\nSudakov logarithms and the medium-induced transverse momentum broadening. For\nthe first time, we employ the systematical resummation formalism and establish\na baseline calculation to describe the dihadron and hadron-jet angular\ncorrelation data in $pp$ and peripheral $AA$ collisions where the medium effect\nis negligible. We demonstrate that the medium-induced broadening $\\langle\np_\\perp^2\\rangle$ and the so-called jet quenching parameter $\\hat q$ can be\nextracted from the angular de-correlations observed in $AA$ collisions. A\nglobal $\\chi^2$ analysis of dihadron and hadron-jet angular correlation data\nrenders the best fit $\\langle p_\\perp^2 \\rangle \\sim 13~\\textrm{GeV}^2$ for a\nquark jet at RHIC top energy. Further experimental and theoretical efforts\nalong the direction of this work shall significantly advance the quantitative\nunderstanding of transverse momentum broadening and help us acquire\nunprecedented knowledge of jet quenching parameter in relativistic heavy-ion\ncollisions.",
        "category": "hep"
    },
    {
        "text": "The decay of the X(3872) into \u03c7_{cJ} and the Operator Product\n  Expansion in XEFT: XEFT is a low energy effective theory for the X(3872) that can be used to\nsystematically analyze the decay and production of the X(3872) meson, assuming\nthat it is a weakly bound state of charmed mesons. In a previous paper, we\ncalculated the decays of X(3872) into \\chi_{cJ} plus pions using a two-step\nprocedure in which Heavy Hadron Chiral Perturbation Theory (HH\\chiPT)\namplitudes are matched onto XEFT operators and then X(3872) decay rates are\nthen calculated using these operators. The procedure leads to IR divergences in\nthe three-body decay X(3872) \\to \\chi_{cJ} \\pi \\pi when virtual D mesons can go\non-shell in tree level HH\\chiPT diagrams. In previous work, we regulated these\nIR divergences with the $D^{*0}$ width. In this work, we carefully analyze\nX(3872) \\to \\chi_{cJ} \\pi^0 and X(3872) \\to \\chi_{cJ} \\pi \\pi using the\noperator product expansion (OPE) in XEFT. Forward scattering amplitudes in\nHH\\chiPT are matched onto local operators in XEFT, the imaginary parts of which\nare responsible for the decay of the X(3872). Here we show that the IR\ndivergences are regulated by the binding momentum of the X(3872) rather than\nthe width of the D^{*0} meson. In the OPE, these IR divergences cancel in the\ncalculation of the matching coefficients so the correct predictions for the\nX(3872) \\to \\chi_{c1} \\pi \\pi do not receive enhancements due to the width of\nthe D^{*0}. We give updated predictions for the decay X(3872) \\to \\chi_{c1} \\pi\n\\pi at leading order in XEFT.",
        "category": "hep"
    },
    {
        "text": "Gravity-Yang-Mills-Higgs unification by enlarging the gauge group: We revisit an old idea that gravity can be unified with Yang-Mills theory by\nenlarging the gauge group of gravity formulated as gauge theory. Our starting\npoint is an action that describes a generally covariant gauge theory for a\ngroup G. The Minkowski background breaks the gauge group by selecting in it a\npreferred gravitational SU(2) subgroup. We expand the action around this\nbackground and find the spectrum of linearized theory to consist of the usual\ngravitons plus Yang-Mills fields charged under the centralizer of the SU(2) in\nG. In addition, there is a set of Higgs fields that are charged both under the\ngravitational and Yang-Mills subgroups. These fields are generically massive\nand interact with both gravity and Yang-Mills sector in the standard way. The\narising interaction of the Yang-Mills sector with gravity is also standard.\nParameters such as the Yang-Mills coupling constant and Higgs mass arise from\nthe potential function defining the theory. Both are realistic in the sense\nexplained in the paper.",
        "category": "hep"
    },
    {
        "text": "Shear Viscosity from AdS Born-Infeld Black Holes: We calculate the shear viscosity in the frame of AdS/CFT correspondence for\nthe field theory with a gravity dual of Einstein-Born-Infeld gravity. We find\nthat the ratio of $\\eta/s$ is still the conjectured universal value $1/4\\pi$ at\nleast up to the first order of the Born-Infeld parameter $1/b^2$.",
        "category": "hep"
    },
    {
        "text": "Effect of small cosmological constant on electromagnetic memory effect: We consider a generic scattering process that takes place in a region of size\nR inside the static patch of the de Sitter spacetime such that R is smaller\nthan the curvature length scale of the background. The effect of curvature can\nthus be studied perturbatively. We obtain the asymptotic electromagnetic field\ngenerated by the scattering process including the leading order correction due\nto the presence of de Sitter background and discuss its universal aspects. We\nfinally caculate the resultant first order corrections to the flat spacetime\nvelocity memory effect.",
        "category": "hep"
    },
    {
        "text": "Magnetic Moment of $\u039e_b(6227)$ as Molecular Pentaquark State: Motivated by the observation of $\\Xi_b(6227)$ state, in this study\nconsidering $\\Xi_b(6227)$ has a molecular structure, we calculate magnetic\nmoment of this state in quark model. The magnetic moment of a hadron gives\nvaluable information about the internal structure and shape deformations. We\nobserve that orbital excitation of $\\Xi_b(6227)$ molecular state change the\nresults of magnetic moment significantly. We also observe that light quarks in\n$\\Xi_b(6227)$ molecular state determine magnetic moment. Measurement of the\nmagnetic moment of $\\Xi_b(6227)$ can clarify the nature of this state and be\nuseful to identify the quantum numbers.",
        "category": "hep"
    },
    {
        "text": "Double spin azimuthal asymmetries A_{LT} and A_{LL} in semi-inclusive\n  DIS: Within the LO QCD parton model of SIDIS with unintegrated quark distribution\nand fragmentation functions we study the transverse momentum and azimuthal\ndependencies of the double spin asymmetries $A_{LT}$ and $A_{LL}$. For later we\ninclude ${\\cal O}(k_{\\perp}/Q)$ kinematic corrections, which induce an\nazimuthal modulation of the asymmetry, analogous to the Cahn effect in\nunpolarized SIDIS. We show that a study of these asymmetries allows to extract\nthe transverse momentum dependence of the unintegrated helicity distribution\nfunction $g_{1L}^q(x,k_\\perp)$ and $g_{1T}^q(x,k_\\perp)$.\n  This report is based on research published in [1] and [2], where predictions\nare given for ongoing COMPASS, HERMES and JLab experiments.",
        "category": "hep"
    },
    {
        "text": "Quantum stabilization of Z-strings in the electroweak model: We study the quantum energy of the Z-string in 2+1 dimensions using the phase\nshift formalism. Our main interest is the question of stability of a Z-string\ncarrying a finite fermion number.",
        "category": "hep"
    },
    {
        "text": "Synergies of Drell-Yan, beauty, top, and Z observables in MFV-SMEFT: The Standard Model Effective Field Theory (SMEFT) is a powerful tool to\nsearch for new physics in a model-independent way. We explore the synergies\narising from different types of observables in a combined, global SMEFT fit.\nSpecifically, we investigate the combination of top-quark measurements, $b\\to\ns$ flavor changing neutral current transitions, $Z\\to b \\bar b$ and $Z\\to c\n\\bar c$, as well as Drell-Yan data from the LHC. We also examine the impact of\nMinimal Flavor Violation (MFV) as a flavor pattern in the global fit. We find\nthat the combination of high-p$_T$ with flavor physics observables provides\npowerful synergies that significantly improve the fit and enable more precise\ntests of various SMEFT operators. By incorporating different observables, we\nare able to remove flat directions in the parameter space and infer on the\nflavor structure based on the MFV parameterization. In particular, we find that\nMFV significantly strengthens the constraints in comparison to a\nflavor-specific approach. Furthermore, our analysis yields a prediction for the\ndineutrino branching ratios ${\\cal{B}}(B \\to K^{(*)} \\nu \\bar \\nu)$ within MFV,\nwhich can be tested experimentally at Belle II.",
        "category": "hep"
    },
    {
        "text": "II. The mass gap and solution of the quark confinement problem in QCD: We have investigated a closed system of equations for the quark propagator,\nobtained earlier within our general approach to QCD at low energies. It implies\nquark confinement (the quark propagator has no pole, indeed), as well as the\ndynamical breakdown of chiral symmetry (a chiral symmetry preserving solution\nis forbidded). This system can be solved exactly in the chiral limit. We have\nestablished the space of the smooth test functions (consisting of the Green's\nfunctions for the quark propagator and the corresponding quark-gluon vertex) in\nwhich our generalized function (the confining gluon propagator) becomes a\ncontinuous linear functional. It is a linear topological space $K(c)$ of the\ninfinitely differentiable functions (with respect to the dimensionless momentum\nvariable $x$), having compact support in the region $x \\leq c$. We develop an\nanalytical formalism, the so-called chiral perturbtion theory at the\nfundamental quark level, which allows one to find explicit solution for the\nquark propagator in powers of the light quark masses. We also develop an\nanalytical formalism, which allows one to find the solution for the quark\npropagator in the inverse powers of the heavy quark masses. It justifies the\nuse for the heavy quark propagator its free counterpart up to terms of the\norder $1/m_Q^3$, where $m_Q$ is the heavy quark mass. So this solution\nautomatically possesses the heavy quark spin-flavor symmetry.",
        "category": "hep"
    },
    {
        "text": "Higgs boson compositeness: from $e^+e^-\\to ZH$ to $e^+e^-\\to Z_L,W_L\n  +anything $: We assume that the Higgs doublet has a composite structure, respecting the\nmain standard model properties, and therefore called Composite Standard Model\n(CSM), but leading (through Goldstone equivalence) to $Z_L$ and $W_L$ form\nfactors. We illustrate how such a form factor affecting the $ZZ_LH$ coupling\nwill be directly observable in $e^+e^-\\to ZH$. We then show the spectacular\nconsequences which would appear in the inclusive processes $e^+e^-\\to\nZ_L+anything $. Such a form factor could also affect the $\\gamma W^+_LW^-_L$\nand $Z W^+_LW^-_L$ vertices and we show what effects this would generate in\n$e^+e^-\\to W^+W^-$ (especially in $e^+e^-_R\\to W^+_LW^-_L$) and in $e^+e^-\\to\nW_L+anything $. We finally mention the $\\gamma\\gamma\\to W^+W^-$ process and\nseveral other processes in hadronic collisions which could be similarly\naffected.",
        "category": "hep"
    },
    {
        "text": "Hadron interaction with heavy quarkonia: Dynamics of hadro-quarkonium system is formulated, based on the channel\ncoupling of a light hadron (h) and heavy quarkonium (Q\\bar{Q}) to intermediate\nopen-flavor heavy-light mesons (Q\\bar{q}, \\bar{Q}q). The resulting effective\ninteraction is defined by overlap integrals of meson wavefunctions and (hq\\bar\nq) coupling, where h is pi, rho, omega, phi, without fitting parameters.\nEquations for hadro-quarkonium amplitudes and resonance positions are written\nexplicitly, and numerically calculated for the special case of pi Upsilon(nS)\n(n=1,2,3). It is also shown, that the recently observed by Belle two peaks\nZ_b(10610) and Z_b(10650) are in agreement with the proposed theory. It is\ndemonstrated, that theory predicts peaks at the BB*, B*B* thresholds in all\navailable pi Upsilon(nS) channels. Analytic nature of these peaks is\ninvestigated, and shown to be due to a common multichannel resonance poles\nclose to the BB*, B*B* thresholds. The general mechanism of these\nhadro-quarkonium resonances does not assume any molecular or four-quark\n(tetraquark) dynamics.",
        "category": "hep"
    },
    {
        "text": "Recent KLOE results on radiative kaon decays: While measuring the ratio R_K = \\Gamma(K+e2(\\gamma))/\\Gamma(K+\\mu2(\\gamma)),\nthe KLOE Collaboration has studied the radiative process Ke2\\gamma. The ratio\nof the width for the Ke2\\gamma decay with a positively polarized photon from\nstructure-dependent radiation to the inclusive K\\mu2(\\gamma) width is found to\nbe 1.484(68) 10-5. The observed radiation spectrum agrees with predictions from\nchiral perturbation theory and is in contrast with predictions based on the\nlight front quark model. This result reduces the contribution to systematic\nuncertainties on measurements of R_K. In a separate study, KLOE has measured\nthe ratio of the radiative Ke3\\gamma decay width to the inclusive Ke3(\\gamma)\nwidth to be 924(28) 10-5. The distribution in energy and angle of the radiative\nphoton has been analyzed in an attempt to isolate the signature from\ninterference of the inner-bremsstrahlung and structure-dependent amplitudes.",
        "category": "hep"
    },
    {
        "text": "Minimal warm inflation with a heavy QCD axion: We propose the first model of warm inflation in which the particle production\nemerges directly from coupling the inflaton to Standard Model particles. Warm\ninflation, an early epoch of sustained accelerated expansion at finite\ntemperature, is a compelling alternative to cold inflation, with distinct\npredictions for inflationary observables such as the amplitude of fluctuations,\nthe spectral tilt, the tensor-to-scalar ratio, and non-gaussianities. In our\nmodel a heavy QCD axion acts as the warm inflaton whose coupling to Standard\nModel gluons sources the thermal bath during warm inflation. Axion-like\ncouplings to non-Abelian gauge bosons have been considered before as a\nsuccessful microphysical theory with emerging thermal friction that can\nmaintain finite temperature during inflation via sphaleron heating. However,\nthe presence of light fermions charged under the non- Abelian group suppresses\nparticle production, hindering a realization of warm inflation by coupling to\nQCD. We point out that the Standard Model quarks can be heavy during warm\ninflation if the Higgs field resides in a high-energy second minimum which\nrestores efficient sphaleron heating. A subsequent large reheating temperature\nis required to allow the Higgs field to relax to its electroweak minimum.\nExploring a scenario in which hybrid inflation provides the large reheating\ntemperature, we show that future collider and beam dump experiments have\ndiscovery potential for a heavy QCD axion taking the role of the minimal warm\ninflaton.",
        "category": "hep"
    },
    {
        "text": "Neutralino Dark Matter from Heavy Gravitino Decay: We propose a new scenario of non-thermal production of neutralino cold dark\nmatter, in which the overproduction problem of lightest supersymmetric\nparticles (LSPs) in the standard thermal history is naturally solved. The\nmechanism requires a heavy modulus field which decays mainly to ordinary\nparticles releasing large entropy to dilute gravitinos produced just after\ninflation and thermal relics of LSPs. Significant amount of gravitinos are also\npair-produced at the decay, which subsequently decay into the neutralinos. We\nidentify the regions of the parameter space in which the requisite abundance of\nthe neutralino dark matter is obtained without spoiling the big-bang\nnucleosynthesis by injection of hadronic showers from gravitino decay. The\nneutralino abundance obtained in this mechanism is insensitive to the details\nof the superparticle mass spectrum, unlike the standard thermal abundance. We\nalso briefly mention the testability of the scenario in future experiments.",
        "category": "hep"
    },
    {
        "text": "The Quantum Group Structure of 2D Gravity and Minimal Models II: The\n  Genus-Zero Chiral Bootstrap: The F and B matrices associated with Virasoro null vectors are derived in\nclosed form by making use of the operator-approach suggested by the Liouville\ntheory, where the quantum-group symmetry is explicit. It is found that the\nentries of the fusing and braiding matrices are not simply equal to\nquantum-group symbols, but involve additional coupling constants whose\nderivation is one aim of the present work. Our explicit formulae are new, to\nour knowledge, in spite of the numerous studies of this problem. The\nrelationship between the quantum-group-invariant (of IRF type) and\nquantum-group-covariant (of vertex type) chiral operator-algebras is fully\nclarified, and connected with the transition to the shadow world for\nquantum-group symbols. The corresponding 3-j-symbol dressing is shown to reduce\nto the simpler transformation of Babelon and one of the author (J.-L. G.) in a\nsuitable infinite limit defined by analytic continuation. The above two types\nof operators are found to coincide when applied to states with Liouville\nmomenta going to $\\infty$ in a suitable way. The introduction of\nquantum-group-covariant operators in the three dimensional picture gives a\ngeneralisation of the quantum-group version of discrete three-dimensional\ngravity that includes tetrahedra associated with 3-j symbols and universal\nR-matrix elements. Altogether the present work gives the concrete realization\nof Moore and Seiberg's scheme that describes the chiral operator-algebra of\ntwo-dimensional gravity and minimal models.",
        "category": "hep"
    },
    {
        "text": "Complexity for Charged Thermofield Double States: We study Nielsen's circuit complexity for a charged thermofield double state\n(cTFD) of free complex scalar quantum field theory in the presence of\nbackground electric field. We show that the ratio of the complexity of\nformation for cTFD state to the thermodynamic entropy is finite and it depends\njust on the temperature and chemical potential. Moreover, this ratio smoothly\napproaches the value for real scalar theory. We compare our field theory\ncalculations with holographic complexity of charged black holes and confirm\nthat the same cost function which is used for neutral case continues to work in\npresence of $U(1)$ background field. For $t>0$, the complexity of cTFD state\nevolves in time and contrasts with holographic results, it saturates after a\ntime of the order of inverse temperature. This discrepancy can be understood by\nthe fact that holographic QFTs are actually strong interacting theories, not\nfree ones.",
        "category": "hep"
    },
    {
        "text": "An Elementary Derivation of the Black-Hole Area-Entropy Relation in Any\n  Dimension: A straightforward two-line derivation of the Bekenstein-Hawking Area-Entropy\nrelation for Black-Holes in {\\bf any} dimension is shown based on Shannon's\ninformation theory and Clifford algebras required by the New Relativity\nPrinciple.",
        "category": "hep"
    },
    {
        "text": "Hidden-charm Hexaquarks from Lattice QCD: We present a lattice QCD study of hidden-charm hexaquarks with quark content\n$usc\\bar{d}\\bar{s}\\bar{c}$ based on four ensembles of gauge configurations\ngenerated by CLQCD Collaboration with pion mass in the range of 220-300MeV.\nFour operators with quantum numbers $0^{++}, 0^{-+}, 1^{++}$ and $1^{--}$\nrespectively are constructed to interpolate the hexaquarks. After validating\nthe spectrum and the dispersion relation for ordinary hadrons, we calculate the\nmasses of the hexaquarks and extrapolate the results to the physical pion mass\nand the continuum limit. We find that the masses of the four hexaquarks are all\nbelow the $\\Xi_c \\bar \\Xi_c$ threshold, while the $0^{-+}$ hexaquark lies\naround the $\\eta_c K^+K^-$ threshold. These results will be helpful for\nexperimental searches in future and for a deep understanding of the nature of\nmultiquark states.",
        "category": "hep"
    },
    {
        "text": "The fate of horizons under quantum corrections: We have studied a lagrangian in which the Einstein-Hilbert term is deformed\nby the Weyl cube operator, which is the lowest-dimension operator that is\nnon-vanishing on shell and appears as a two-loop counterterm. There is a\ntension between the Schwarzschild de Sitter (SdS) spacetime and this operator,\nwhich we study in some detail.",
        "category": "hep"
    },
    {
        "text": "Stop Lepton Associated Production at Hadron Colliders: At hadron colliders, the search for R-parity violating supersymmetry can\nprobe scalar masses beyond what is covered by pair production processes. We\nevaluate the next-to-leading order SUSY-QCD corrections to the associated stop\nor sbottom production with a lepton through R-parity violating interactions. We\nshow that higher order corrections render the theoretical predictions more\nstable with respect to variations of the renormalization and factorization\nscales and that the total cross section is enhanced by a factor up to 70% at\nthe Tevatron and 50% at the LHC. We investigate in detail how the heavy\nsupersymmetric states decouple from the next-to-leading order process, which\ngives rise to a theory with an additional scalar leptoquark. In this scenario\nthe inclusion of higher order QCD corrections increases the Tevatron reach on\nleptoquark masses by up to 40 GeV and the LHC reach by up to 200 GeV.",
        "category": "hep"
    },
    {
        "text": "Entropic f(R) Gravity: In this short paper we follow the entropic gravity approach and demonstrate\nhow \\(f(R)\\) theories of gravity can be emergent. This is done by introducing\nan effective gravitational constant which is naturally arising from the\n\\(f(R)\\)'s equations of motion.",
        "category": "hep"
    },
    {
        "text": "Aspects of self-dual Yang-Mills and self-dual gravity: In this thesis, we study the all same helicity loop amplitudes in self-dual\nYang-Mills and self-dual gravity. These amplitudes have long been conjectured\nto be interpreted as an anomaly and are recently linked to the UV divergence of\ntwo-loop quantum gravity. In the first part of the thesis, we study the loop\namplitudes in self-dual Yang-Mills. We show that the four point one-loop\namplitude can be reduced to a computation of shifts, which strongly suggests a\ncase for an anomaly interpretation. We next propose a new formula for the\none-loop amplitudes at all multiplicity, in terms of the Berends-Giele currents\nconnected by an effective propagator. We prove the formula by observing that it\nreadily implies the correct collinear properties. To demonstrate the validity\nof our formula, we do an explicit computation at 3, 4 and 5 points and\nreproduce the known results. The region momenta variables play an important\nrole in our formula and thus it points to both the worldsheet and the momentum\ntwistor interpretations. In the second part of the thesis, we study the one\nloop behaviour of chiral Einstein-Cartan gravity and the one-loop amplitudes in\nself-dual gravity.",
        "category": "hep"
    },
    {
        "text": "Perspectives in Neutrino Physics: This is a Concluding Talk, not a Summary of the Conference. I will discuss\nsome of the highlights that particularly impressed me (a subjective choice) and\nmake some comments on the status and the prospects of neutrino mass and mixing.",
        "category": "hep"
    },
    {
        "text": "Comment on 'Gravitating magnetic monopole in the global monopole\n  spacetime': We point out a problem with the stability of composite (global-magnetic)\nmonopoles recently proposed by J. Spinelly, U. de Freitas and E.R. Bezerra de\nMello [Phys. Rev. D66, 024018 (2002)].",
        "category": "hep"
    },
    {
        "text": "Leading neutron production at the EIC and LHeC: estimating the impact of\n  the absorptive corrections: Leading neutron (LN) production in $ep$ collisions at high energies is\ninvestigated using the color dipole formalism and taking into account\nsaturation effects. We update the treatment of absorptive effects and estimate\nthe impact of these effects on LN spectra in the kinematical range that will be\nprobed by the Electron Ion Collider (EIC) and by the Large Hadron electron\nCollider (LHeC). We demonstrate that Feynman scaling, associated to saturation,\nis not violated by the inclusion of absorptive effects. Moreover, our results\nindicate that the LN spectrum is strongly suppressed at small photon\nvirtualities. These results suggest that absorptive effects cannot be\ndisregarded in future measurements of the $\\gamma \\pi$ cross section to be\nextracted from data on leading neutron production.",
        "category": "hep"
    },
    {
        "text": "Higher Derivative Supergravities in Diverse Dimensions: We survey on-shell and off-shell higher derivative supergravities in\ndimensions $1\\le D\\le 11$. Various approaches to their construction, including\nthe Noether procedure, (harmonic) superspace, superform method, superconformal\ntensor calculus, $S$-matrix and dimensional reduction, are summarized.\nPrimarily the bosonic parts of the invariants and the supertransformations of\nthe fermionic fields are provided. The process of going on-shell, solutions to\nthe Killing spinor equations, typical supersymmetric solutions, and the role of\nduality symmetries in the context of $R^4, D^4 R^4$ and $D^6 R^4$ invariants\nare reviewed.",
        "category": "hep"
    },
    {
        "text": "Line Shapes of the Z(4430): The Belle Collaboration recently discovered the first manifestly exotic\nmeson: Z^+(4430), which decays into psi' pi^+ and therefore has quark content c\nc-bar u d-bar. The proximity of its mass to the D_1 D-bar^* threshold has\nmotivated the interpretation of the Z^+ as a charm meson molecule whose\nconstituents are an S-wave superposition of D_1^+ D-bar^{*0}$ and D^{*+}\nD-bar_1^0$. If this interpretation is correct, the small ratio of the binding\nenergy of the Z^+ to the width Gamma_1 of its constituent D_1 can be exploited\nto predict properties of its line shapes. Its full width at half maximum in the\nchannel psi' pi^+ should be approximately sqrt{3} Gamma_1 = 35 MeV, which is\nconsistent with the measured width of the Z^+. The Z^+ should also decay into\nD^* D-bar^* pi through decay of its constituent D_1. The peak in the line shape\nfor D^* D-bar^* pi should be at a higher energy than the peak in the line shape\nfor psi' pi^+ by about Gamma_1/sqrt{12} = 6 MeV. The line shape in D^* D-bar^*\npi should also be broader and asymmetric, with a shoulder on the high energy\nside that can be attributed to a threshold enhancement in the production of D_1\nD-bar^*.",
        "category": "hep"
    },
    {
        "text": "Brane singularities and their avoidance in a fluid bulk: Using the method of asymptotic splittings, the possible singularity\nstructures and the corresponding asymptotic behavior of a 3-brane in a\nfive-dimensional bulk are classified, in the case where the bulk field content\nis parametrized by an analog of perfect fluid with an arbitrary equation of\nstate $P=\\gamma\\rho$ between the `pressure' $P$ and the `density' $\\rho$. In\nthis analogy with homogeneous cosmologies, the time is replaced by the extra\ncoordinate transverse to the 3-brane, whose world-volume can have an arbitrary\nconstant curvature. The results depend crucially on the constant parameter\n$\\gamma$: (i) For $\\gamma>-1/2$, the flat brane solution suffers from a\ncollapse singularity at finite distance, that disappears in the curved case.\n(ii) For $\\gamma<-1$, the singularity cannot be avoided and it becomes of the\ntype big rip for a flat brane. (iii) For $-1<\\gamma\\le -1/2$, the surprising\nresult is found that while the curved brane solution is singular, the flat\nbrane is not, opening the possibility for a revival of the self-tuning\nproposal.",
        "category": "hep"
    },
    {
        "text": "Pion and Kaon box contribution to $a_\u03bc^{\\text{HLbL}}$: We present an evaluation of the $\\pi^\\pm$ and $K^\\pm$ box contributions to\nthe hadronic light-by-light piece of the muon's anomalous magnetic moment,\n$a_\\mu$. The calculation of the corresponding electromagnetic form factors\n(EFFs) is performed within a Dyson-Schwinger equations (DSE) approach to\nquantum chromodynamics. These form factors are calculated in the so-called\nrainbow-ladder (RL) truncation, following two different evaluation methods and,\nsubsequently, in a further improved approximation scheme which incorporates\nmeson cloud effects. The results are mutually consistent, indicating that in\nthe domain of relevance for $a_\\mu$ the obtained EFFs are practically\nequivalent. Our analysis yields the combined estimates of\n$a_\\mu^{\\pi^\\pm-box}=-(15.6\\pm 0.2)\\times 10^{-11}$ and\n$a_\\mu^{K^\\pm-\\text{box}}=-(0.48\\pm 0.02)\\times 10^{-11}$, in full agreement\nwith results previously obtained within the DSE formalism and other\ncontemporary estimates.",
        "category": "hep"
    },
    {
        "text": "Study of RPC gas mixtures for the ARGO-YBJ experiment: The ARGO-YBJ experiment consists of a RPC carpet to be operated at the\nYangbajing laboratory (Tibet, P.R. China), 4300 m a.s.l., and devoted to the\ndetection of showers initiated by photon primaries in the energy range 100 GeV\n- 20 TeV. The measurement technique, namely the timing on the shower front with\na few tens of particles, requires RPC operation with 1 ns time resolution, low\nstrip multiplicity, high efficiency and low single counting rate. We have\ntested RPCs with many gas mixtures, at sea level, in order to optimize these\nparameters. The results of this study are reported.",
        "category": "hep"
    },
    {
        "text": "Dynamical Dark Matter and the Positron Excess in Light of AMS: The AMS-02 experiment has recently released data which confirms a rise in the\ncosmic-ray positron fraction as a function of energy up to approximately 350\nGeV. Over the past decade, attempts to interpret this positron excess in terms\nof dark-matter decays have become increasingly complex and have led to a number\nof general expectations about the decaying dark-matter particles: such\nparticles cannot undergo simple two-body decays to leptons, for example, and\nthey must have rather heavy TeV-scale masses. In this paper, by contrast, we\nshow that Dynamical Dark Matter (DDM) can not only match existing AMS-02 data\non the positron excess, but also accomplish this feat with significantly\nlighter dark-matter constituents undergoing simple two-body decays to leptons.\nMoreover, we demonstrate that this can be done without running afoul of\nnumerous other competing constraints from FERMI and Planck on decaying dark\nmatter. Finally, we demonstrate that the Dynamical Dark Matter framework makes\na fairly robust prediction that the positron fraction should level off and then\nremain roughly constant out to approximately 1 TeV, without experiencing any\nsharp downturns. Indeed, if we interpret the positron excess in terms of\ndecaying dark matter, we find that the existence of a plateau in the positron\nfraction at energies less than 1 TeV may be taken as a \"smoking gun\" of\nDynamical Dark Matter.",
        "category": "hep"
    },
    {
        "text": "Solutions of D=4 Gauged Pseudo-Supergravity: The techniques of spinorial geometry are used to classify solutions admitting\nKilling spinors in the theory of minimal anti-de Sitter $N=2$, $D=4$\nsupergravity, where the gauge kinetic term comes with the opposite sign. There\nare four classes of solutions. One class is described by metrics corresponding\nto gravitational waves propagating on $AdS_2\\times H^2$. The second class of\nsolution is a new solution corresponding to a special limiting case of the\nKilling spinor. The third class of solution corresponds to fibrations over a\nLorentzian three dimensional manifold which has a Lorentzian Gauduchon-Tod\nstructure. The fourth class of solution is a cosmological extension of a\nMajumdar-Papapetrou type solution, described by a function satisfying the wave\nequation on $\\mathbb{R}^{2,1}$ .",
        "category": "hep"
    },
    {
        "text": "Higgs Bosons in Warped Space, from the Bulk to the Brane: In the context of warped extra-dimensional models with all fields propagating\nin the bulk, we address the phenomenology of a bulk scalar Higgs boson, and\ncalculate its production cross section at the LHC as well as its tree-level\neffects on mediating flavor changing neutral currents. We perform the\ncalculations based on two different approaches. First, we compute our\npredictions analytically by considering all the degrees of freedom emerging\nfrom the dimensional reduction (the infinite tower of Kaluza Klein modes (KK)).\nIn the second approach, we perform our calculations numerically by considering\nonly the effects caused by the first few KK modes, present in the 4-dimensional\neffective theory. In the case of a Higgs leaking far from the brane, both\napproaches give the same predictions as the effects of the heavier KK modes\ndecouple. However, as the Higgs boson is pushed towards the TeV brane, the two\napproaches seem to be equivalent only when one includes heavier and heavier\ndegrees of freedom (which do not seem to decouple). To reconcile these results\nit is necessary to introduce a type of higher derivative operator which\nessentially encodes the effects of integrating out the heavy KK modes and\ndresses the brane Higgs so that it looks just like a bulk Higgs.",
        "category": "hep"
    },
    {
        "text": "Non-linear Breit-Wheeler pair production in collisions of bremsstrahlung\n  $\u03b3-$quanta and a tightly focussed laser pulse: Experimental efforts toward the detection of the nonperturbative strong-field\nregime of the Breit-Wheeler pair creation process plan to combine incoherent\nsources of GeV $\\gamma$ quanta and the coherent fields of tightly focussed\noptical laser pulses. This endeavour calls for a theoretical understanding of\nhow the pair yields depend on the applied laser field profile. We provide\nestimates for the number of produced pairs in a setup where the high-energy\nradiation is generated via bremsstrahlung. Attention is paid to the role of the\ntransversal and longitudinal focussing of the laser field, along with the\nincorporation of a Gaussian pulse envelope. We compare our corresponding\nresults with predictions from plane-wave models and determine the parameters of\nfocused laser pulses which maximize the pair yield at fixed pulse energy.\nBesides, the impact of various super-Gaussian profiles for the laser pulse\nenvelope and its transverse shape is discussed.",
        "category": "hep"
    },
    {
        "text": "The forward particle production in the energy range of 1 PeV as seen\n  with the Tibet hybrid experiment: We are now operating the 500 m2 Yangbajing air-shower core (YAC-II) array\nnear the center of the Tibet air-shower array (Tibet-III) to observe cosmic-ray\nchemical composition at the knee energy region since February 2011. The first\nstep of YAC, called YAC-I, containing 16 detector units, was operated from May,\n2009 to February, 2010. In this paper, we used the YAC-I and Tibet-III\ncoincident data set obtained from May, 2009 through January, 2010 to present\nthe electromagnetic spectrum of air shower cores at around 1015 eV energy\nregion. The effective live time is calculated as 100.5 days. We would like to\nreport the comparison of our experimental data with MC model prediction in this\npaper.",
        "category": "hep"
    },
    {
        "text": "Yukawa Hierarchy Transfer from Superconformal Sector and Degenerate\n  Sfermion Masses: We propose a new type of supersymmetric models coupled to superconformal\nfield theories (SCFT's), leading simultaneously to hierarchical Yukawa\ncouplings and completely degenerate sfermion masses. We consider models with an\nextra Abelian gauge symmetry to generate hierarchical structure for couplings\nbetween the SM sector and the SC sector. Interestingly, this hierarchy is\ninversely transferred to the Yukawa couplings in the SM sector. In this type of\nmodels, flavor-independent structure of the superconformal fixed point\nguarantees that the sfermion masses of the first and the second generations are\ncompletely degenerate at low energy.",
        "category": "hep"
    },
    {
        "text": "The $N_f \\,C_F^3$ contribution to the non-singlet splitting function at\n  four-loop order: We report a new result for the $N_f \\,C_F^3$ contribution to the four-loop\nanomalous dimensions of non-singlet, twist-two operators in Quantum\nChromodynamics. This result is obtained through computations of off-shell\noperator matrix elements. Employing integration-by-parts reductions and\ndifferential equations with respect to a tracing parameter allowed us to derive\nanalytic results valid for arbitrary Mellin moment $n$.",
        "category": "hep"
    },
    {
        "text": "Experimental observation of a Rindler horizon: In this manuscript we confirm the presence of a Rindler horizon at CERN-NA63\nby exploring its thermodynamics induced by the Unruh effect in their high\nenergy channeling radiation experiments. By linking the entropy of the emitted\nradiation to the photon number, we find the measured spectrum to be a simple\nmanifestation of the second law of Rindler horizon thermodynamics and thus a\ndirect measurement of the recoil Fulling-Davies-Unruh (FDU) temperature.\nMoreover, since the experiment is born out of an ultra-relativistic positron,\nand the FDU temperature is defined in the proper frame, we find that\ntemperature boosts as a length and thus fast objects appear colder. The\nspectrum also provides us with a simple setting to measure fundamental\nconstants, and we employ it to measure the positron mass.",
        "category": "hep"
    },
    {
        "text": "Constructing the off-diagonal part of active-neutrino mass matrix from\n  annihilation and creation matrices in neutrino-generation space: The off-diagonal part of the active-neutrino mass matrix is constructed from\ntwo $3\\times 3$ matrices playing the role of annihilation and creation matrices\nacting in the neutrino-generation space of $\\nu_e, \\nu_\\mu, \\nu_\\tau$. The\nconstruction leads to a new relation, $M_{\\mu \\tau} = 4\\sqrt{3} M_{e \\mu} $,\nwhich predicts in the case of tribimaximal neutrino mixing that $m_3 - m_1 =\n\\eta (m_2 - m_1)$ with $\\eta = 5.28547$. Then, the maximal possible value of\n${\\Delta m^2_{32}}/{\\Delta m^2_{21}}$ is equal to $\\eta^2 -1 = 26.9362$ and\ngives $m_1 = 0$. With the experimental estimate ${\\Delta m^2_{21}}\\sim\n8.0\\times 10^{-5} {\\rm eV}^2$, this maximal value, if realized, predicts\n$\\Delta m^2_{32} \\sim 2.2\\times 10^{-3} {\\rm eV}^2$, near to the popular\nexperimental estimation $\\Delta m^2_{32} \\sim 2.4\\times 10^{-3} {\\rm eV}^2$.",
        "category": "hep"
    },
    {
        "text": "Down Type Isosinglet Quarks in ATLAS: We evaluate the discovery reach of the ATLAS experiment for down type\nisosinglet quarks, $D$, using both their neutral and charged decay channels,\nnamely the process $pp\\to D\\bar{D}+X$ with subsequent decays resulting in\n$2\\ell+2j+E^{miss}_{T}$, $3\\ell+2j+E^{miss}_{T}$ and $2\\ell+4j$ final states.\nThe integrated luminosity required for observation of a heavy quark is\nestimated for a mass range between 600 and 1000 GeV using the combination of\nresults from different search channels.",
        "category": "hep"
    },
    {
        "text": "A guide to two-dimensional conformal field theory: This is a review of two-dimensional conformal field theory including some of\nthe relations to integrable models. An effort is made to develop the basic\nformalism in a way which is as elementary and flexible as possible at the same\ntime. Some advanced topics like conformal field theory on higher genus surfaces\nand relations to the isomonodromic deformation problem are discussed, for other\ntopics we offer a first guide to the literature.",
        "category": "hep"
    },
    {
        "text": "On the IR Divergences in de Sitter Space: loops, resummation and the\n  semi-classical wavefunction: In this paper, we revisit the infrared (IR) divergences in de Sitter (dS)\nspace using the wavefunction method, and explicitly explore how the resummation\nof higher-order loops leads to the stochastic formalism. In light of recent\ndevelopments of the cosmological bootstrap, we track the behaviour of these\nnontrivial IR effects from perturbation theory to the non-perturbative regime.\nSpecifically, we first examine the perturbative computation of wavefunction\ncoefficients, and show that there is a clear distinction between classical\ncomponents from tree-level diagrams and quantum ones from loop processes.\nCosmological correlators at loop level receive contributions from tree-level\nwavefunction coefficients, which we dub classical loops. This distinction\nsignificantly simplifies the analysis of loop-level IR divergences, as we find\nthe leading contributions always come from these classical loops. Then we\ncompare with correlators from the perturbative stochastic computation, and find\nthe results there are essentially the ones from classical loops, while quantum\nloops are only present as subleading corrections. This demonstrates that the\nleading IR effects are contained in the semi-classical wavefunction which is a\nresummation of all the tree-level diagrams. With this insight, we go beyond\nperturbation theory and present a new derivation of the stochastic formalism\nusing the saddle-point approximation. We show that the Fokker-Planck equation\nfollows as a consequence of two effects: the drift from the Schr\\\"odinger\nequation that describes the bulk time evolution, and the diffusion from the\nPolchinski's equation which corresponds to the exact renormalization group flow\nof the coarse-grained theory on the boundary.",
        "category": "hep"
    },
    {
        "text": "Conformal symmetry and its breaking in two dimensional Nearly\n  Anti-de-Sitter space: We study a two dimensional dilaton gravity system, recently examined by\nAlmheiri and Polchinski, which describes near extremal black holes, or more\ngenerally, nearly $AdS_2$ spacetimes. The asymptotic symmetries of $AdS_2$ are\nall the time reparametrizations of the boundary. These symmetries are\nspontaneously broken by the $AdS_2$ geometry and they are explicitly broken by\nthe small deformation away from $AdS_2$. This pattern of spontaneous plus\nexplicit symmetry breaking governs the gravitational backreaction of the\nsystem. It determines several gravitational properties such as the linear in\ntemperature dependence of the near extremal entropy as well as the\ngravitational corrections to correlation functions. These corrections include\nthe ones determining the growth of out of time order correlators that is\nindicative of chaos. These gravitational aspects can be described in terms of a\nSchwarzian derivative effective action for a reparametrization.",
        "category": "hep"
    },
    {
        "text": "Inclusive charmed-meson production from bottom hadron decays at the LHC: We present predictions for the inclusive productions of the D meson\noriginating from bottom hadrons at the CERN LHC in the general-mass\nvariable-flavour-number scheme at next-to-leading order. We present results\nusing two methods to describe the transition for $b\\rightarrow D$: a two-step\ntransition $b\\rightarrow B \\rightarrow D$, based on the $b\\rightarrow B$\nfragmentation functions and the spectra for $B\\rightarrow D$ as measured by\nCLEO and a one-step transition based on the fragmentation functions for\n$b\\rightarrow D$. The results of both approaches are compared.",
        "category": "hep"
    },
    {
        "text": "Parton distributions incorporating QED contributions: We perform a global parton analysis of deep inelastic and related\nhard-scattering data, including ${\\cal O}(\\alpha_{\\rm QED})$ corrections to the\nparton evolution. Although the quality of the fit is essentially unchanged,\nthere are two important physical consequences. First, the different DGLAP\nevolution of u and d type quarks introduces isospin violation, i.e. $u^p \\neq\nd^n$, which is found to be unambiguously in the direction to reduce the NuTeV\n$\\sin^2\\theta_W$ anomaly. A second consequence is the appearance of photon\nparton distributions $\\gamma(x,Q^2)$ of the proton and the neutron. In\nprinciple these can be measured at HERA via the deep inelastic scattering\nprocesses $e N \\to e\\gamma X$; our predictions are in agreement with the\npresent data.",
        "category": "hep"
    },
    {
        "text": "String cosmology from Poisson-Lie T-dual sigma models on supermanifolds: We generalize the formulation of Poisson-Lie T-dual sigma models on manifolds\nto supermanifolds. In this respect, we formulate 1+1 dimensional string\ncosmological models on the Lie supergroup C^3 and its dual (A_1,1 +\n2A)^0_(1,0,0), which are coupled to two fermionic fields. Then, we solve the\nequations of motion of the models and show that there is a essential\nsingularity for the metric of the original model and its dual.",
        "category": "hep"
    },
    {
        "text": "Behavior near $\u03b8=\u03c0$ of the mass gap in the 2D O(3) non-linear\n  sigma model: The validity of the Haldane's conjecture entails that the mass gap of the\n2-dimensional O(3) non-linear sigma model with a $\\theta$-term must tend to\nzero as $\\theta$ approaches the value $\\pi$ by following a precise law. In the\npresent paper we extract the related critical exponents by simulating the model\nat imaginary $\\theta$.",
        "category": "hep"
    },
    {
        "text": "Higgs scalar potential coupled to gravity in the exponential\n  parametrization in arbitrary gauge: We study the parametrization and gauge dependences in the Higgs field coupled\nto gravity in the context of asymptotic safety. We use the exponential\nparametrization to derive the fixed points for the cosmological constant,\nPlanck mass, Higgs mass and its coupling, keeping arbitrary gauge parameters\n$\\alpha$ and $\\beta$, and compare the results with the linear split. We find\nthat the beta functions for the Higgs potential are expressed in terms of\nredefined Planck mass such that the apparent gauge dependence is absent. Only\nthe trace mode of the gravity fluctuations couples to the Higgs potential and\nit tends to decouple in the large $\\beta$ limit, but the anomalous dimension\nbecomes large, invalidating the local potential approximation. This gives the\nlimitation of the exponential parametrization. There are also singularities for\nsome values of the gauge parameters but well away from these, we find rather\nstable fixed points and critical exponents. We thus find that there are regions\nfor the gauge parameters to give stable fixed points and critical exponents\nagainst the change of gauge parameters. The Higgs coupling is confirmed to be\nirrelevant for the reasonable choice of gauge parameters.",
        "category": "hep"
    },
    {
        "text": "On non-linear superfield versions of the vector-tensor multiplet: We propose a harmonic superspace description of the non-linear vector-tensor\nN=2 multiplet. We show that there exist two inequivalent version: the old one\nin which one of the vectors is the field-strength of a gauge two-form, and a\nnew one in which this vector satisfies a non-linear constraint and cannot be\nexpressed in terms of a potential. In this the new version resembles the\nnon-linear N=2 multiplet. We perform the dualization of both non-linear\nversions and discuss the resulting K\\\"ahler potentials. Finally, we couple the\nnon-linear vector-tensor multiplet to an abelian background gauge multiplet.",
        "category": "hep"
    },
    {
        "text": "PP-waves from BPS supergravity monopoles: We discuss the Penrose limit of the Chamseddine-Volkov BPS selfgravitating\nmonopole in four dimensional N=4 supergravity theory with non-abelian gauge\nmultiplets. We analyze the properties of the resulting supersymmetric pp-wave\nsolutions when various Penrose limits are considered. Apart from the usual\nrescaling of coordinates and fields we find that a rescaling of the gauge\ncoupling constant to zero is required, rendering the theory abelian. We also\nstudy the Killing spinor equations showing an enhancement of the\nsupersymmetries preserved by the solutions and discuss the embedding of the\npp-wave solution in $d=10$ dimensions.",
        "category": "hep"
    },
    {
        "text": "Through the blackness -- high p_T hadrons probing the central region of\n  200 AGeV Au-Au collisions: The energy loss of high p_T partons propagating through a hot and dense\nmedium is regarded as a valuable tool to probe the medium created in\nultrarelativistic heavy-ion collisions. The angular correlation pattern of\nhadrons associated with a hard trigger in the region of p_T ~1-2 GeV which\nexhibits a dip in the expected position of the away side jet has given rise to\nthe idea that energy is lost predominantly to propagating collective modes\n('Mach cones'). Recent measurements by the STAR collaboration have shown that\nfor a high p_T > 8 GeV trigger the angular pattern of associate hadrons for p_T\n> 4 GeV shows the emergence of the expected away side peak. These di-jet events\nsuggest that the away side parton may emerge occasionally without substantial\nenergy loss. Since in such a back-to-back configuration one of the partons may\ntravel through the central region of the fireball, the average in-medium\npathlength is substantial and the expected energy loss is not only sensitive to\nthe initial geometry of matter but also to the change of geometry due to\nexpansion. We show that radiative energy loss is able to explain the dijet\nevents provided that the expansion of the medium is taken into account.",
        "category": "hep"
    },
    {
        "text": "Monopoles and deconfinement transition in finite temperature $SU(2)$ QCD: We investigate the role of monopoles in the deconfinement transition of\nfinite temperature $SU(2)$ QCD in the maximally abelian gauge. In the\nconfinement phase a long monopole loop exists in each configuration, whereas no\nlong loop exists in the deep deconfinement region. Balancing of the energy and\nthe entropy of loops of the maximally extended monopoles can explain the\noccurrence of the deconfinement transition.",
        "category": "hep"
    },
    {
        "text": "Thermal modification of open heavy-flavor mesons from an effective\n  hadronic theory: We have developed a self-consistent theoretical approach to study the\nmodification of the properties of heavy mesons in hot mesonic matter which\ntakes into account chiral and heavy-quark spin-flavor symmetries. The\nheavy-light meson-meson unitarized scattering amplitudes in coupled channels\nincorporate thermal corrections by using the imaginary-time formalism, as well\nas the dressing of the heavy mesons with the self-energies. We report our\nresults for the ground-state thermal spectral functions and the implications\nfor the excited mesonic states generated dynamically in the heavy-light\nmolecular model. We have applied these to the calculation of meson Euclidean\ncorrelators and transport coefficients for D mesons and summarize here our\nfindings.",
        "category": "hep"
    },
    {
        "text": "BRST approach to Lagrangian construction for fermionic higher spin\n  fields in AdS space: We develop a general gauge invariant Lagrangian construction for half-integer\nhigher spin fields in the AdS space of any dimension. Starting with formulation\nin terms of auxiliary Fock space we derive the closed nonlinear symmetry\nalgebras of higher spin fermionic fields in the AdS space and find the\ncorresponding BRST operator. A universal procedure of constructing the gauge\ninvariant Lagrangians describing the dynamics of fermionic fields of any spin\nis developed. No off-shell constraints for the fields and gauge parameters are\nimposed from the very beginning. It is shown that all the constraints\ndetermining the irreducible representation of the AdS group arise as a\nconsequence of the equations of motion and gauge transformations. As an example\nof the general procedure, we derive the gauge invariant Lagrangians for massive\nfermionic fields of spin 1/2 and 3/2 containing the total set of auxiliary\nfields and gauge symmetries.",
        "category": "hep"
    },
    {
        "text": "Two-loop stability of singlet extensions of the SM with dark matter: We present a study of the high energy stability of a minimal complex singlet\nextension of the Standard Model with or without dark matter (CxSM). We start by\nobtaining the beta functions of the couplings of the theory from the effective\npotential and then perform the RGE evolution for the allowed parameter space of\nthe model at the electroweak scale. We obtain the scale up to which the model\nsurvives and combine this information with all the LHC measurements as well as\nbounds from dark matter detection experiments as well as the relic density best\nmeasurement from Planck. We conclude that scenarios which solve both the dark\nmatter and stability problems must contain a dark particle heavier than 50 GeV\nand a new visible state (mixing with the SM-like Higgs) heavier than 170 GeV.",
        "category": "hep"
    },
    {
        "text": "APPLICATIONS OF EFFECTIVE LAGRANGIANS: The applications of effective lagrangians to the determination of the effects\nof physics beyond the Standard Model are briefly described. Emphasis is given\nto those effective operators which generate the largest deviations form the\nStandard Model; some applications are described. of the paper (or other short\ndescription) [Talk given at \"Beyond the Standard Model IV\", Lake Tahoe, CA,\nDec. 13-18, 1994]",
        "category": "hep"
    },
    {
        "text": "Heavy Meson Radiative Decays and Light Vector Meson Dominance: Electromagnetic interactions are introduced in the effective chiral\nLagrangian for heavy mesons which includes light vector particles. A suitable\nnotion of vector meson dominance is formulated. The constraints on the heavy\nmeson -light vector and heavy meson-light pseudoscalar coupling constants are\nobtained using experimental $D^* \\ra D \\, \\gamma $ branching ratios. These\nconstraints are compared with values estimated from semi-leptonic transition\namplitudes as well as from extension of the light meson coupling pattern.\nApplication to the heavy baryon spectrum in the ``bound state \" model is made.",
        "category": "hep"
    },
    {
        "text": "Nilpotent (Anti-)BRST and (Anti-)co-BRST Symmetries in 2D non-Abelian\n  Gauge Theory: Some Novel Observations: We discuss the nilpotent Becchi-Rouet-Stora-Tyutin (BRST), anti-BRST and\n(anti-)co-BRST symmetry transformations and derive their corresponding\nconserved charges in the case of a two (1+1)-dimensional (2D) self-interacting\nnon-Abelian gauge theory (without any interaction with matter fields). We point\nout a set of novel features that emerge out in the BRST and co-BRST analysis of\nthe above 2D gauge theory. The algebraic structures of the symmetry operators\n(and corresponding conserved charges) and their relationship with the\ncohomological operators of differential geometry are established, too. To be\nmore precise, we demonstrate the existence of a single Lagrangian density that\nrespects the continuous symmetries which obey proper algebraic structure of the\ncohomological operators of differential geometry. In literature, such\nobservations have been made for the coupled (but equivalent) Lagrangian\ndensities of the 4D non-Abelian gauge theory. We lay emphasis on the existence\nand properties of the Curci-Ferrari (CF) type restrictions in the context of\n(anti-)BRST and (anti-)co-BRST symmetry transformations and pinpoint their key\ndifferences and similarities. All the observations, connected with the\n(anti-)co-BRST symmetries, are completely novel.",
        "category": "hep"
    },
    {
        "text": "Instanton Effects in Matrix Models and String Effective Lagrangians: We perform an explicit calculation of the lowest order effects of single\neigenvalue instantons on the continuous sector of the collective field theory\nderived from a $d=1$ bosonic matrix model. These effects consist of certain\ninduced operators whose exact form we exhibit.",
        "category": "hep"
    },
    {
        "text": "On the Connection of Leptogenesis with Low Energy CP Violation and LFV\n  Charged Lepton Decays: Assuming only a hierarchical structure of the heavy Majorana neutrino masses\nand of the neutrino Dirac mass matrix m_D of the see-saw mechanism, we find\nthat in order to produce the observed baryon asymmetry of the Universe via\nleptogenesis, the scale of m_D should be given by the up-quark masses. Lepton\nflavor violating decays \\mu \\to e + \\gamma, \\tau \\to \\mu + \\gamma and \\tau \\to\ne + \\gamma are considered and a characteristic relation between their decay\nrates is predicted. The effective Majorana mass in neutrinoless double beta\ndecay depends on the CP violating phase controlling the leptogenesis if one of\nthe heavy Majorana neutrinos is much heavier than the other two. Successful\nleptogenesis requires a rather mild mass hierarchy between the latter. The\ncompatibility of this hierarchical see-saw model with the low energy neutrino\nmixing phenomenology requires that the mixing angle limited by the CHOOZ and\nPalo Verde experiments should be relatively large, \\sin^2\\theta_3 \\gtap 0.01.\nThe CP violation effects in neutrino oscillations can be observable. In\ngeneral, there is no direct connection between the latter and the CP violation\nin leptogenesis. If the CP violating phases of the see-saw model satisfy\ncertain relations, the baryon asymmetry of the Universe and the rephasing\ninvariant J_{CP} which determines the magnitude of the CP violation effects in\nneutrino oscillations, depend on the same CP violating phase and their signs\nare correlated.",
        "category": "hep"
    },
    {
        "text": "Chiral Symmetry Restoration through Hawking-Unruh Thermalization Effect: Comments on the chiral symmetry restoration through the Hawking-Unruh effect\nare given.",
        "category": "hep"
    },
    {
        "text": "Precise Determination of the Weak Mixing Angle from a measurement of ALR\n  in e+e- -> Z0: In the 1993 SLC/SLD run, the SLD recorded 50,000 $\\z0$ events produced by the\ncollision of longitudinally polarized electrons on unpolarized positrons at a\ncenter-of-mass energy of 91.26 GeV. The luminosity-weighted average\npolarization of the SLC electron beam was (63.0$\\pm$1.1)\\%. We measure the\nleft-right cross-section asymmetry in $\\z0$ boson production, $\\alr$, to be\n0.1628$\\pm$0.0071(stat.)$\\pm$0.0028(syst.) which determines the effective weak\nmixing angle to be $\\swein=0.2292\\pm0.0009({\\rm stat.})\\pm0.0004({\\rm syst.}).$",
        "category": "hep"
    },
    {
        "text": "Dimensional reduction to hypersurface of foliation: When the bulk spacetime has a foliation structure, the collective dynamics of\nthe hypersurfaces should reveal certain aspects of the bulk physics. The\nprocedure of reducing the bulk to a hypersurface, called ADM reduction, was\nimplemented in \\cite{Park:2013iqa} where the 4D Einstein-Hilbert action was\nreduced along the radial reduction. In this work, reduction along the angular\ndirections is considered {with a main goal to firmly establish the method of\ndimensional reduction to a hypersurface of foliation.} We obtain a theory on a\n2D plane (the $(t,r)$-plane) and observe that novel and elaborate boundary\neffects are crucial for the consistency of the reduction. The reduction leads\nto a 2D interacting quantum field theory. We comment on its application to\nblack hole information physics.",
        "category": "hep"
    },
    {
        "text": "String Field Theory Around the Tachyon Vacuum: Assuming that around the tachyon vacuum the kinetic term of cubic open string\nfield theory is made purely of ghost operators we are led to gauge invariant\nactions which manifestly implement the absence of open string dynamics around\nthis vacuum. We test this proposal by showing the existence of lump solutions\nof arbitrary codimension in this string field theory. The key ingredients in\nthis analysis are certain assumptions about the analyticity properties of\ntachyon Green's functions. With the help of some further assumptions about the\nproperties of these Green's functions, we also calculate the ratios of tensions\nof lump solutions of different dimensions. The result is in perfect agreement\nwith the known answers for the ratios of tensions of D-branes of different\ndimensions.",
        "category": "hep"
    },
    {
        "text": "One-particle reducible contribution to the one-loop scalar propagator in\n  a constant field: Recently, Gies and Karbstein showed that the two-loop Euler-Heisenberg\nLagrangian receives a finite one-particle reducible contribution in addition to\nthe well-known one-particle irreducible one. Here, we demonstrate that a\nsimilar contribution exists for the propagator in a constant field already at\nthe one-loop level, and we calculate this contribution for the scalar QED case.\nWe also present an independent derivation of the Gies-Karbstein result using\nthe worldline formalism, treating the scalar and spinor QED cases in a unified\nmanner.",
        "category": "hep"
    },
    {
        "text": "Angular analyses of exclusive $\\overline{B} \\to X_J \\ell_1 \\ell_2$\n  decays for spin $J \\leq 4$: As an update to our previous calculation for spin $J\\leq2$, we present the\nangular moments for exclusive $\\overline{B} \\to X_J \\ell_1 \\ell_2$, where\n$\\ell_1$ is a charged massless lepton and $\\ell_2$ is a charged or neutral\nmassless lepton, and $X_J$ is a mesonic system with spin $J\\leq4$. The expected\napplications include higher resonances in the $[K\\pi]$ system in\n$\\overline{B}^0 \\to K^- \\pi^+ \\mu^- \\mu^+$ at LHCb in Run~II, and in the $[\\pi\n\\pi]$ system for $ \\overline{B} \\to \\pi \\pi \\ell^- \\bar{\\nu}_\\ell$ at Belle~II.\nFor the $J\\leq2$ case, we also provide a set of consistency relations among the\nmeasured moments observables and validate them against the latest measurements\nfrom LHCb.",
        "category": "hep"
    },
    {
        "text": "Enhanced $h\\rightarrow \u03b3\u03b3$ rate in MSSM singlet extensions: We study the di-photon rate in Higgs decays within singlet extensions of the\nsupersymmetric standard model. In particular we point out that light charginos\nas well as a light charged Higgs can significantly contribute to the\ncorresponding partial decay width, allowing for an explanation of the\nexperimental indication whithin a natural supersymmetric model. This is in\ncontrast to the `light stau scenario' proposed within the framework of the MSSM\nwhich requires a large amount of electroweak fine tuning.",
        "category": "hep"
    },
    {
        "text": "Quintessence models in Supergravity: Scalar field models of quintessence typically require that the expectation\nvalue of the field today is of order the Planck mass, if we want them to\nexplain the observed acceleration of the Universe. This suggests that we should\nbe considering models in the context of supergravity. We discuss a particular\nclass of supergravity models and analyze their behavior under different choices\nof the Kahler metric.",
        "category": "hep"
    },
    {
        "text": "On a generalised bootstrap principle: The S-matrices for non-simply-laced affine Toda field theories are considered\nin the context of a generalised bootstrap principle. The S-matrices, and in\nparticular their poles, depend on a parameter whose range lies between the\nCoxeter numbers of dual pairs of the corresponding non-simply-laced algebras.\nIt is proposed that only odd order poles in the physical strip with positive\ncoefficients throughout this range should participate in the bootstrap. All\nother singularities have an explanation in principle in terms of a generalised\nColeman-Thun mechanism. Besides the S-matrices introduced by Delius, Grisaru\nand Zanon, the missing case ($f_4^{(1)},e_6^{(2)}$), is also considered and\nprovides many interesting examples of pole generation.",
        "category": "hep"
    },
    {
        "text": "Analysis of the vertexes $\u03a9^*_Q\u03a9_Q^*\u03c6$,\n  $\u03a9^*_Q\u039e_Q^*K^*$, $\u039e_Q^*\u03a3^*_QK^*$ and $\u03a3_Q^*\u03a3^*_Q\n  \u03c1$ with the light-cone QCD sum rules: In this article, we parameterize the vertexes $\\Omega^*_Q\\Omega_Q^*\\phi$,\n$\\Omega^*_Q\\Xi_Q^*K^*$,\n  $\\Xi_Q^*\\Sigma^*_QK^*$ and $\\Sigma_Q^*\\Sigma^*_Q \\rho$ with four tensor\nstructures due to Lorentz invariance, and study the corresponding four strong\ncoupling constants with the light-cone QCD sum rules.",
        "category": "hep"
    },
    {
        "text": "D = 5 maximally supersymmetric Yang-Mills theory diverges at six loops: The connection of maximally supersymmetric Yang-Mills theory to the (2,0)\ntheory in six dimensions has raised the possibility that it might be\nperturbatively ultraviolet finite in five dimensions. We test this hypothesis\nby computing the coefficient of the first potential ultraviolet divergence of\nplanar (large N_c) maximally supersymmetric Yang-Mills theory in D = 5, which\noccurs at six loops. We show that the coefficient is nonvanishing. Furthermore,\nthe numerical value of the divergence falls very close to an approximate\nexponential formula based on the coefficients of the divergences through five\nloops. This formula predicts the approximate values of the ultraviolet\ndivergence at loop orders L > 6 in the critical dimension D = 4 + 6/L. To\nobtain the six-loop divergence we first construct the planar six-loop\nfour-point amplitude integrand using generalized unitarity. The ultraviolet\ndivergence follows from a set of vacuum integrals, which are obtained by\nexpanding the integrand in the external momenta. The vacuum integrals are\nintegrated via sector decomposition, using a modified version of the FIESTA\nprogram.",
        "category": "hep"
    },
    {
        "text": "Self-consistent determination of hard modes in hot QCD: We determine self-consistently the hard-quark and hard-gluon modes in hot\nQCD. The damping-rate part in resummed hard-quark or hard-gluon propagators,\nrather than the thermal-mass part, plays the dominant role.",
        "category": "hep"
    },
    {
        "text": "Measurement of the semileptonic $CP$ asymmetry in $B^0-\\overline{B}{}^0$\n  mixing: The semileptonic $CP$ asymmetry in $B^0-\\overline{B}{}^0$ mixing, $a_{\\rm\nsl}^d$, is measured in proton-proton collision data, corresponding to an\nintegrated luminosity of 3.0 fb$^{-1}$, recorded by the LHCb experiment.\nSemileptonic $B^0$ decays are reconstructed in the inclusive final states\n$D^-\\mu^+$ and $D^{*-}\\mu^+$, where the $D^-$ meson decays into the\n$K^+\\pi^-\\pi^-$ final state, and the $D^{*-}$ meson into the\n$\\overline{D}{}^0(\\rightarrow K^+\\pi^-)\\pi^-$ final state. The asymmetry\nbetween the numbers of $D^{(*)-}\\mu^+$ and $D^{(*)+}\\mu^-$ decays is measured\nas a function of the decay time of the $B^0$ mesons. The $CP$ asymmetry is\nmeasured to be $a_{\\rm sl}^d = (-0.02 \\pm 0.19 \\pm 0.30)\\%$, where the first\nuncertainty is statistical and the second systematic. This is the most precise\nmeasurement of $a_{\\rm sl}^d$ to date and is consistent with the prediction\nfrom the Standard Model.",
        "category": "hep"
    },
    {
        "text": "Maximally localized states and quantum corrections of black hole\n  thermodynamics in the framework of a new generalized uncertainty principle: As a generalized uncertainty principle (GUP) leads to the effects of the\nminimal length of the order of the Planck scale and UV/IR mixing, some\nsignificant physical concepts and quantities are modified or corrected\ncorrespondingly. On the one hand, we derive the maximally localized states ---\nthe physical states displaying the minimal length uncertainty associated with a\nnew GUP proposed in our previous work. On the other hand, in the framework of\nthis new GUP we calculate quantum corrections to the thermodynamic quantities\nof the Schwardzschild black hole, such as the Hawking temperature, the entropy,\nand the heat capacity, and give a remnant mass of the black hole at the end of\nthe evaporation process. Moreover, we compare our results with that obtained in\nthe frameworks of several other GUPs. In particular, we observe a significant\ndifference between the situations with and without the consideration of the\nUV/IR mixing effect in the quantum corrections to the evaporation rate and the\ndecay time. That is, the decay time can greatly be prolonged in the former\ncase, which implies that the quantum correction from the UV/IR mixing effect\nmay give rise to a radical rather than a tiny influence to the Hawking\nradiation.",
        "category": "hep"
    },
    {
        "text": "Celestial $w_{1+\\infty}$ charges and the subleading structure of\n  asymptotically-flat spacetimes: We study the subleading structure of asymptotically-flat spacetimes and its\nrelationship to the $w_{1+\\infty}$ loop algebra of higher spin charges. We do\nso using both the Bondi-Sachs and the Newman-Penrose formalism, via a\ndictionary built from a preferred choice of tetrad. This enables us to access\nproperties of the so-called higher Bondi aspects, such as their evolution\nequations, their transformation laws under asymptotic symmetries, and their\nrelationship to the Newman-Penrose and the higher spin charges. By studying the\nrecursive Einstein evolution equations defining these higher spin charges, we\nderive the general form of their transformation behavior under BMSW symmetries.\nThis leads to an immediate proof that the spin 0,1 and spin $s$ brackets\nreproduce upon linearization the structure expected from the $w_{1+\\infty}$\nalgebra. We then define renormalized higher spin charges which are conserved in\nthe radiative vacuum at quadratic order, and show that they satisfy for all\nspins the $w_{1+\\infty}$ algebra at linear order in the radiative data.",
        "category": "hep"
    },
    {
        "text": "The Temperley-Lieb algebra and its generalizations in the Potts and XXZ\n  models: We discuss generalizations of the Temperley-Lieb algebra in the Potts and XXZ\nmodels. These can be used to describe the addition of different types of\nintegrable boundary terms.\n  We use the Temperley-Lieb algebra and its one-boundary, two-boundary, and\nperiodic extensions to classify different integrable boundary terms in the 2,\n3, and 4-state Potts models. The representations always lie at critical points\nwhere the algebras becomes non-semisimple and possess indecomposable\nrepresentations. In the one-boundary case we show how to use representation\ntheory to extract the Potts spectrum from an XXZ model with particular boundary\nterms and hence obtain the finite size scaling of the Potts models. In the\ntwo-boundary case we find that the Potts spectrum can be obtained by combining\nseveral XXZ models with different boundary terms. As in the Temperley-Lieb case\nthere is a direct correspondence between representations of the lattice algebra\nand those in the continuum conformal field theory.",
        "category": "hep"
    },
    {
        "text": "Exploring the structure of the proton through polarization observables\n  in l p \\to jet X: We present results for a complete set of polarization observables for jet\nproduction in lepton proton collision, where the final state lepton is not\nobserved. The calculations are carried out in collinear factorization at the\nlevel of Born diagrams. For all the observables we also provide numerical\nestimates for typical kinematics of a potential future Electron Ion Collider.\nOn the basis of this numerical study, the prospects for the transverse single\ntarget spin asymmetry are particularly promising. This observable is given by a\ncertain quark-gluon correlation function, which has a direct relation to the\ntransverse momentum dependent Sivers parton distribution.",
        "category": "hep"
    },
    {
        "text": "New results in exclusive hard reactions: Generalized Parton Distributions offer a new way to access the quark and\ngluon nucleon structure. We review recent progress in this domain, emphasizing\nthe need to supplement the experimental study of DVCS by its crossed version,\ntimelike Compton scattering (TCS), where data at high energy should appear\nthanks to the study of ultraperipheral collisions at the LHC. This will open\nthe access to very low skewness quark and gluon GPDs. Our leading order\nestimates show that the factorization scale dependence of the amplitudes is\nquite high. This fact demands the understanding of higher order contributions\nwith the hope that they will stabilize this scale dependence. The magnitudes of\nthe NLO coefficient functions are not small and neither is the difference of\nthe coefficient functions appearing respectively in the DVCS and TCS\namplitudes. The conclusion is that extracting the universal GPDs from both TCS\nand DVCS reactions requires much care. We also describe the extension of the\nGPD concept to three quark operators and the relevance of their nucleon to\nmeson matrix elements, namely the transition distribution amplitudes (TDAs)\nwhich factorize in hard exclusive pion electroproduction off a nucleon in the\nbackward region and baryon-antibaryon annihilation into a pion and a lepton\npair. We discuss the main properties of the TDAs.",
        "category": "hep"
    },
    {
        "text": "Greybody Factors of Charged Dilaton Black Holes in 2 + 1 Dimensions: We have studied scalar perturbations of charged dilaton black holes in 2+1\ndimensions. The black hole considered here is a solution to the low-energy\nstring theory in 2+1 dimensions. The exact decay rates and the grey body\nfactors for the massless minimally coupled scalar is computed for both the\ncharged and the uncharged dilaton black holes. The charged and the uncharged\nblack hole show similar behavior for grey body factors, reflection coefficients\nand decay rates.",
        "category": "hep"
    },
    {
        "text": "Thermodynamics of the Reissner-Nordstr\u00f6m-de Sitter Spacetime with\n  Quintessence: For Anti-de Sitte (AdS) black holes, the isochoric heat capacity of system is\nvanished, while the isobaric heat capacity is not. However, this situation does\nnot hold on for de Sitter (dS) black holes. In this work, by introducing the\ninteraction between the black hole horizon and the cosmological horizon of the\nReissner-Nordstr\\\"om-de Sitter (RNdS) spacetime with quintessence, we discuss\nthe phase transition of this system. The results show that the spacetime not\nonly has the similar phase transition behavior to that of Van der Waals (VdW)\nsystem, and the non-vanishing isochoric heat capacity fulfills the whole\nthermodynamics system. Through the discussion of the entropic force between two\nhorizons, we find out the role of entropic force in the evolution of spacetime.\nIn addition, we also study the influence of various parameters on the phase\ntransition and entropic force, which will provide a new method for exploring\nthe interaction among black hole molecules from a micro perspective.",
        "category": "hep"
    },
    {
        "text": "Aharonov-Bohm Radiation of Fermions: We analyze Aharonov-Bohm radiation of charged fermions from oscillating\nsolenoids and cosmic strings. We find that the angular pattern of the radiation\nhas features that differ significantly from that for bosons. For example,\nfermionic radiation in the lowest harmonic is approximately isotropically\ndistributed around an oscillating solenoid, whereas for bosons the radiation is\ndipolar. We also investigate the spin polarization of the emitted\nfermion-antifermion pair. Fermionic radiation from kinks and cusps on cosmic\nstrings is shown to depend linearly on the ultraviolet cut-off, suggesting\nstrong emission at an energy scale comparable to the string energy scale.",
        "category": "hep"
    },
    {
        "text": "The dissipative potential induced by QCD at finite temperature and\n  density: In the framework of QCD at finite temperature we have obtained dissipative\nterms for the effective potential between $q$ and $\\bar q$ which would partly\nexplain the $J/\\psi$ suppression in the Quark Gluon Plasma (QGP). The\nderivation of the dissipative potential for QGP is presented and the case for\nHadron Matter (HM) is briefly discussed. The suppression effects are estimated\nbased on simple approximations.",
        "category": "hep"
    },
    {
        "text": "Heavy Quark Symmetry: We review the current status of heavy quark symmetry and its applications to\nweak decays of hadrons containing a single heavy quark. After an introduction\nto the underlying physical ideas, we discuss in detail the formalism of the\nheavy quark effective theory, including a comprehensive treatment of symmetry\nbreaking corrections. We then illustrate some nonperturbative approaches, which\naim at a dynamical, QCD-based calculation of the universal form factors of the\neffective theory. The main focus is on results obtained using QCD sum rules.\nFinally, we perform an essentially model-independent analysis of semileptonic\n$B$ meson decays in the context of the heavy quark effective theory.",
        "category": "hep"
    },
    {
        "text": "Improving the Effective Potential:Multi-Mass-Scale Case: Previously proposed procedure for improving the effective potential by using\nrenormalization group equation (RGE) is generalized so as to be applicable to\nany system containing several different mass scales. If one knows L-loop\neffective potential and (L+1)-loop RGE coefficient functions, this procedure\ngives an improved potential which satisfies the RGE and contains all of the\nleading, next-to-leading,..., and L-th-to-leading log terms. Our procedure here\nalso clarifies how naturally the so-called effective field theory can be\nincorporated in the RGE in MS bar scheme.",
        "category": "hep"
    },
    {
        "text": "A precise determination of the psibar-psi anomalous dimension in\n  conformal gauge theories: A strategy for computing the psibar-psi anomalous dimension at the fixed\npoint in infrared-conformal gauge theories from lattice simulations is\ndiscussed. The method is based on the scaling of the spectral density of the\nDirac operator or rather its integral, the mode number. It is relatively cheap,\nmainly for two reasons: (a) the mode number can be determined with quite high\naccuracy, (b) the psibar-psi anomalous dimension is extracted from a fit of\nseveral observables on the same set of configurations (no scaling in the\nLagrangian parameters is needed). As an example the psibar-psi anomalous\ndimension has been computed in the SU(2) theory with 2 Dirac fermions in the\nadjoint representation of the gauge group, and has been found to be 0.371(20).\nIn this particular case, the proposed strategy has proved to be very robust and\neffective.",
        "category": "hep"
    },
    {
        "text": "Parton distributions and $\\cos 2\u03c6_h$ asymmetry induced by anomalous\n  photon-quark coupling: In the spectator models of the nucleon with scalar and axial-vector diquarks,\nwe show that the effect of Pauli coupling in photon-quark vertex to the parton\ndistribution functions (PDFs) of nucleon and azimuthal asymmetry in the\nunpolarized semi-inclusive deep inelastic scattering (SIDIS). This anomalous\ncoupling gives obvious contribution to unpolarized and polarized PDFs, and also\nleads to a $\\cos 2\\phi_h$ azimuthal asymmetry proportional to the squared Pauli\nform factor, due to the helicity flip of the struck quark. After determining\nthe model parameters by fitting PDFs to the global fits, this new distribution\nfor $\\cos 2\\phi_h$ asymmetry is given numerically. In the framework of\ntransverse momentum dependence (TMD), we find that it is positive and of a few\npercent in the kinematical regime of HERMES and COMPASS collaborations, in the\nsame order of magnitude with Cahn effect.",
        "category": "hep"
    },
    {
        "text": "Very Special (de Sitter) Relativity: The effects of a non-vanishing value for the cosmological constant in the\nscenario of Lorentz symmetry breaking recently proposed by Cohen and Glashow\n(which they denote as Very Special Relativity) are explored and observable\nconsequences are pointed out.",
        "category": "hep"
    },
    {
        "text": "Spin and localization of relativistic fermions and uncertainty relations: We discuss relations between several relativistic spin observables and derive\na Lorentz-invariant characteristic of a reduced spin density matrix.A\nrelativistic position operator that satisfies all the properties of its\nnonrelativistic analog does not exist. Instead we propose two\ncausality-preserving positive operator-valued measures (POVMs) that are based\non projections onto one-particle and antiparticle spaces, and on the normalized\nenergy density. They predict identical expectation values for position. The\nvariances differ by less than a quarter of the squared de Broglie wavelength\nand coincide in the nonrelativistic limit. Since the resulting statistical\nmoment operators are not canonical conjugates of momentum, the Heisenberg\nuncertainty relations need not hold. Indeed, the energy density POVM leads to a\nlower uncertainty. We reformulate the standard equations of the spin dynamics\nby explicitly considering the charge-independent acceleration, allowing a\nconsistent treatment of backreaction and inclusion of a weak gravitational\nfield.",
        "category": "hep"
    },
    {
        "text": "Hyperscaling violating Schrodinger black holes in\n  Einstein-Maxwell-scalar theory: We present a novel family of asymptotically Schrodinger hyperscaling\nviolating black holes with a generic dynamical critical exponent and an\narbitrary number of spacetime dimensions. This black hole family represents a\nsolution within the Einstein-Maxwell-scalar setup with a self-interaction\nscalar potential where the Maxwell field is coupled to the scalar field.\nThrough an analysis of the curvature invariants it is observed that this\nconfiguration is asymptotically regular for different ranges of the\nhyperscaling violating exponent. Furthermore, the above mentioned solution\nconstitutes a gravitational candidate for describing field theories with\nhyperscaling violating Schrodinger symmetry at finite temperature within the\nframework of the Gravity/Condensed Matter Theory correspondence.",
        "category": "hep"
    },
    {
        "text": "All the supersymmetric solutions of N=1,d=5 ungauged supergravity: We classify the supersymmetric solutions of ungauged N=1 d=5 SUGRA coupled to\nvector multiplets and hypermultiplets. All the solutions can be seen as\ndeformations of solutions with frozen hyperscalars. We show explicitly how the\n5-dimensional Reissner-Nordstrom black hole is deformed when hyperscalars are\nliving on SO(4,1)/SO(4) are turned on, reducing its supersymmetry from 1/2 to\n1/8. We also describe in the timelike and null cases the solutions that have\none extra isometry and can be reduced to N=2,d=4 solutions. Our formulae allows\nthe uplifting of certain N=2,d=4 black holes to N=1,d=5 black holes on KK\nmonopoles or to pp-waves propagating along black strings.",
        "category": "hep"
    },
    {
        "text": "A New Formula for the Gauge Charge: We present a new formula for the gauge charge in the causal formalism for the\nQCD case.",
        "category": "hep"
    },
    {
        "text": "General Relativistic effects in preheating: General relativistic effects in the form of metric perturbations are usually\nneglected in the preheating era that follows inflation. We argue that in\nrealistic multi-field models these effects are in fact crucial, and the fully\ncoupled system of metric and quantum field fluctuations needs to be considered.\nMetric perturbations are resonantly amplified, breaking the scale-invariance of\nthe primordial spectrum, and in turn stimulate scalar field resonances via\ngravitational rescattering. This non-gravitationally dominated nonlinear growth\nof gravitational fluctuations may have significant effects on the Doppler peaks\nin the cosmic background radiation, primordial black hole formation,\ngravitational waves and nonthermal symmetry restoration.",
        "category": "hep"
    },
    {
        "text": "Strong Coupling Holography: We show that whenever a 4-dimensional theory with N particle species emerges\nas a consistent low energy description of a 3-brane embedded in an\nasymptotically-flat (4+d)-dimensional space, the holographic scale of\nhigh-dimensional gravity sets the strong coupling scale of the 4D theory. This\nconnection persists in the limit in which gravity can be consistently\ndecoupled. We demonstrate this effect for orbifold planes, as well as for the\nsolitonic branes and string theoretic D-branes. In all cases the emergence of a\n4D strong coupling scale from bulk holography is a persistent phenomenon. The\neffect turns out to be insensitive even to such extreme deformations of the\nbrane action that seemingly shield 4D theory from the bulk gravity effects. A\nwell understood example of such deformation is given by large 4D Einstein term\nin the 3-brane action, which is known to suppress the strength of 5D gravity at\nshort distances and change the 5D Newton's law into the four-dimensional one.\nNevertheless, we observe that the scale at which the scalar polarization of an\neffective 4D-graviton becomes strongly coupled is again set by the bulk\nholographic scale. The effect persist in the gravity decoupling limit, when the\nfull theory reduces to a 4D system in which the only memory about the\nhigh-dimensional holography is encoded in the strong coupling scale. The\nobserved intrinsic connection between the high-dimensional flat space\nholography and 4D strong coupling suggests a possible guideline for\ngeneralization of AdS/CFT duality to other systems.",
        "category": "hep"
    },
    {
        "text": "Explaining the CMS excesses, baryogenesis and neutrino masses in $E_{6}$\n  motivated $U(1)_{N}$ model: We study the superstring inspired $E_{6}$ model motivated $U(1)_{N}$\nextension of the supersymmetric standard model to explore the possibility of\nexplaining the recent excess CMS events and the baryon asymmetry of the\nuniverse in eight possible variants of the model. In light of the hints from\nshort-baseline neutrino experiments at the existence of one or more light\nsterile neutrinos, we also study the neutrino mass matrices dictated by the\nfield assignments and the discrete symmetries in these variants. We find that\nall the variants can explain the excess CMS events via the exotic slepton\ndecay, while for a standard choice of the discrete symmetry four of the\nvariants have the feature of allowing high scale baryogenesis (leptogenesis).\nFor one other variant three body decay induced soft baryogenesis mechanism is\npossible which can induce baryon number violating neutron-antineutron\noscillation. We also point out a new discrete symmetry which has the feature of\nensuring proton stability and forbidding tree level flavor changing neutral\ncurrent processes while allowing for the possibility of high scale leptogenesis\nfor two of the variants. On the other hand, neutrino mass matrix of the\n$U(1)_{N}$ model variants naturally accommodates three active and two sterile\nneutrinos which acquire masses through their mixing with extra neutral fermions\ngiving rise to interesting textures for neutrino masses.",
        "category": "hep"
    },
    {
        "text": "Aspects of the Flavour Expansion Theorem: The Flavour Expansion Theorem, which has been recently proposed as a more\ngeneral and elegant algebraic method, for the derivation of the commonly used\nMass Insertion Approximation, is revisited. The theorem is reviewed, with\nrespect to its straightforward applications in Flavour physics, and compared\nagainst the standard diagrammatic flavour basis techniques, in cases where the\nlatter become inadequate.",
        "category": "hep"
    },
    {
        "text": "A New Approach to Construct the Operator on Lattice for the Calculation\n  of Glueball Masses: We develop a new approach to construct the operator on lattice for the\ncalculation of glueball mass, which is based on the connection between the\ncontinuum limit of the chosen operator and the quantum number $J^{PC}$ of the\nstate studied. The spin of the state studied is then determined uniquely and\ndirectly in numerical simulation. Furthermore, the approach can be applied to\ncalculate the mass of glueball states (ground or excited states) with any spin\n$J$ including $J\\geq 4$. Under the quenched approximation, we present\npre-calculation results for the masses of $0^{++}$ state and $2^{++}$ state,\nwhich are $1754(85)(86)MeV$ and $2417(56)(117)MeV$, respectively.",
        "category": "hep"
    },
    {
        "text": "QCD Sum-Rule Interpretation of X(3872) with $J^{PC}=1^{++}$ Mixtures of\n  Hybrid Charmonium and $\\bar D D^*$ Molecular Currents: QCD sum-rules are employed to determine whether the X(3872) can be described\nas a mixed state that couples to $J^{PC}=1^{++}$ charmonium hybrid and $\\bar D\nD^*$ molecular currents. After calculating the mixed correlator of hybrid and\nmolecular currents, we formulate the sum-rule in terms of a mixing parameter\nthat interpolates between the pure molecular and hybrid scenarios. As the\nmixing parameter is increased from the pure molecular case, the predicted mass\nincreases until it reaches a maximum value in good agreement with the X(3872)\nand the resulting sum-rule analysis appears more robust than the pure molecular\ncase.",
        "category": "hep"
    },
    {
        "text": "Study of Anomalous Couplings at a $500$~GeV $e^+e^-$ Linear Collider\n  with Polarized Beams: We consider the possibility of observing deviations from the Standard Model\ngauge-boson self-couplings at a future $500$~GeV $e^+ e^-$ linear collider. We\nconcentrate on the case in which the electroweak symmetry breaking sector is\nstrongly interacting and there are no new resonances within reach of the\ncollider. We find a sensitivity to the anomalous couplings that is two orders\nof magnitude higher than that achievable at LEP II. We also show how a\npolarized electron beam extends the reach of the collider, allowing experiments\nto probe different directions in parameter space.",
        "category": "hep"
    },
    {
        "text": "Hermitean matrix model free energy: Feynman graph technique for all\n  genera: We present a diagrammatic technique for calculating the free energy of the\nHermitian one-matrix model to all orders of 1/N expansion in the case where the\nlimiting eigenvalue distribution spans arbitrary (but fixed) number of disjoint\nintervals (curves).",
        "category": "hep"
    },
    {
        "text": "Learning Lattice Quantum Field Theories with Equivariant Continuous\n  Flows: We propose a novel machine learning method for sampling from the\nhigh-dimensional probability distributions of Lattice Field Theories, which is\nbased on a single neural ODE layer and incorporates the full symmetries of the\nproblem. We test our model on the $\\phi^4$ theory, showing that it\nsystematically outperforms previously proposed flow-based methods in sampling\nefficiency, and the improvement is especially pronounced for larger lattices.\nFurthermore, we demonstrate that our model can learn a continuous family of\ntheories at once, and the results of learning can be transferred to larger\nlattices. Such generalizations further accentuate the advantages of machine\nlearning methods.",
        "category": "hep"
    },
    {
        "text": "Localization for Yang-Mills Theory on the Fuzzy Sphere: We present a new model for Yang-Mills theory on the fuzzy sphere in which the\nconfiguration space of gauge fields is given by a coadjoint orbit. In the\nclassical limit it reduces to ordinary Yang-Mills theory on the sphere. We find\nall classical solutions of the gauge theory and use nonabelian localization\ntechniques to write the partition function entirely as a sum over local\ncontributions from critical points of the action, which are evaluated\nexplicitly. The partition function of ordinary Yang-Mills theory on the sphere\nis recovered in the classical limit as a sum over instantons. We also apply\nabelian localization techniques and the geometry of symmetric spaces to derive\nan explicit combinatorial expression for the partition function, and compare\nthe two approaches. These extend the standard techniques for solving gauge\ntheory on the sphere to the fuzzy case in a rigorous framework.",
        "category": "hep"
    },
    {
        "text": "Feebly coupled vector boson dark matter in effective theory: A model of dark matter (DM) that communicates with the Standard Model (SM)\nexclusively through suppressed dimension five operator is discussed. The SM is\naugmented with a symmetry $U(1)_X \\otimes Z_2$, where $U(1)_X$ is gauged and\nbroken spontaneously by a very heavy decoupled scalar. The massive $U(1)_X$\nvector boson ($X^\\mu$) is stabilized being odd under unbroken $Z_2$ and\ntherefore may contribute as the DM component of the universe. Dark sector field\nstrength tensor $X^{\\mu\\nu}$ couples to the SM hypercharge tensor $B^{\\mu\\nu}$\nvia the presence of a heavier $Z_2$ odd real scalar $\\Phi$, i.e. $1/\\Lambda \\;\nX^{\\mu\\nu}B_{\\mu\\nu}\\Phi$, with $\\Lambda$ being a scale of new physics. The\nfreeze-in production of the vector boson dark matter feebly coupled to the SM\nis advocated in this analysis. Limitations of the so-called UV freeze-in\nmechanism that emerge when the maximum reheat temperature $T_\\text{RH}$ drops\ndown close to the scale of DM mass are discussed. The parameter space of the\nmodel consistent with the observed DM abundance is determined. The model easily\nand naturally avoids both direct and indirect DM searches. Possibility for\ndetection at the Large Hadron Collider (LHC) is also considered. A Stueckelberg\nformulation of the model is derived.",
        "category": "hep"
    },
    {
        "text": "Reduction of One-loop Tensor Form-Factors to Scalar Integrals: A General\n  Scheme: A general method for reducing tensor form factors, that appear in one-loop\ncalculations in dimensional regularization, to scalar integrals is presented.\nThe method is an extension of the reduction scheme introduced by Passarino and\nVeltman and is applicable in all regions of parameter space including those\nwhere kinematic Gram determinant vanishes. New relations between the the form\nfactors that valid for vanishing Gram determinant play a key role in the\nextended scheme.",
        "category": "hep"
    },
    {
        "text": "Combined measurements of anomalous charged trilinear gauge-boson\n  couplings from diboson production in p-pbar collisions at sqrt(s)=1.96 TeV: We present measurements of the anomalous WWgamma and WWZ trilinear gauge\ncouplings from a combination of four diboson production and decay channels\nusing data collected by the D0 detector at the Fermilab Tevatron Collider.\nThese results represent the first high statistics combination of limits across\ndifferent diboson production processes at the Tevatron and use data\ncorresponding to an integrated luminosity of approximately 1 fb^-1. When\nrespecting SU(2)_L x U(1)_Y symmetry, we measure central values and 68% C.L.\nallowed intervals of kappa_gamma=1.07^+0.16_-0.20, lambda =0.00^+0.05_-0.04 and\ng_1^Z=1.05 +/- 0.06. We present the most stringent measurements to date for the\nW boson magnetic dipole and electromagnetic quadrupole moments of\nmu_W=2.02^+0.08_-0.09 (e/2M_W) and q_W=-1.00 +/- 0.09 (e/M^2_W), respectively.",
        "category": "hep"
    },
    {
        "text": "Slow nucleation rates in Chain Inflation with QCD Axions or Monodromy: The previous proposal (by two of us) of chain inflation with the QCD axion is\nshown to fail. The proposal involved a series of fast tunneling events, yet\nhere it is shown that tunneling is too slow. We calculate the bubble nucleation\nrates for phase transitions in the thick wall limit, approximating the barrier\nby a triangle. A similar problem arises in realization of chain inflation in\nthe string landscape that uses series of minima along the monodromy staircase\naround the conifold point. The basic problem is that the minima of the\npotential are too far apart to allow rapid enough tunneling in these two\nmodels. We entertain the possibility of overcoming this problem by modifying\nthe gravity sector to a Brans-Dicke theory. However, one would need extremely\nsmall values for the Brans-Dicke parameter. Many successful alternatives exist,\nincluding other \"axions\" (with mass scales not set by QCD) or potentials with\ncomparable heights and widths that do not suffer from the problem of slow\ntunneling and provide successful candidates for chain inflation.",
        "category": "hep"
    },
    {
        "text": "Search for Lepton Flavor Violating tau Decays into Three Leptons: We search for lepton-flavor-violating tau decays into three leptons (electron\nor muon) using 535 fb^{-1} of data collected with the Belle detector at the\nKEKB asymmetric-energy e+e- collider. No evidence for these decays is observed\nand we set 90% confidence level upper limits on the branching fractions between\n2.0x10^{-8} and 4.1x10^{-8}. These results improve the best previously\npublished upper limits by factors from 4.9 to 7.0.",
        "category": "hep"
    },
    {
        "text": "Catching p via s wave with indirect detection: For many dark matter models, the annihilation cross section to two-body final\nstates is difficult to probe with current experiments because the dominant\nannihilation channel is velocity or helicity suppressed. The inclusion of gauge\nboson radiation for three-body final states can lift the helicity suppression,\nallowing a velocity-independent cross section to dominate the annihilation\nprocess, and providing an avenue to constrain these models. Here we examine\nexperimental constraints on dark matter that annihilates to two leptons plus a\nbremsstrahlung boson, $\\bar{\\ell}+\\ell+\\gamma/W/Z$. We consider experimental\nconstraints on photon final states from Fermi-LAT using both diffuse photon\ndata and data from dwarf spheroidal galaxies, and compare to the implied\nconstraints from 21 cm measurements. Diffuse photon line searches are generally\nthe strongest over the entire mass regime. We in particular highlight the model\nin which dark matter annihilates to two neutrinos and a photon, and show that\nthese models are more strongly constrained through photon measurements than\nthrough existing neutrino bounds.",
        "category": "hep"
    },
    {
        "text": "Derivations and noncommutative differential calculus II: We characterize the derivation $d:A\\to \\Omega^1_{\\der}(A)$ by a universal\nproperty introducing a new class of bimodules.",
        "category": "hep"
    },
    {
        "text": "Vacuum Energy from an Extra Dimension with UV/IR Connection: We propose a lower limit on the size of a single discrete gravitational extra\ndimension in the context of an effective field theory for massive gravitons.\nThe limit arises in this setup from the requirement that the Casimir energy\ndensity of quantum fields is in agreement with the observed dark energy density\nof the universe. The Casimir energy densities can be exponentially suppressed\nto an almost arbitrarily small value by the masses of heavy bulk fields,\nthereby allowing a tiny size of the extra dimension. This suppression is only\nrestricted by the strong coupling scale of the theory, which is known to be\nrelated to the compactification scale via an UV/IR connection for local\ngravitational theory spaces. We thus obtain an upper limit on the\ncompactification scale of the discrete gravitational extra dimension in the\nrange 10^7 GeV...10^12 GeV, while the strong coupling scale is by a factor 10^2\nlarger than the compactification scale. We also comment on a possible\ncancelation of the gravitational contribution to the quantum effective\npotential.",
        "category": "hep"
    },
    {
        "text": "Holographic RG flow dual to attractor flow in extremal black holes: We extend the discussion of the \"Kerr/CFT correspondence\" and its recent\ndevelopments to the more general gauge/gravity correspondence in the full\nextremal black hole space-time of the bulk by using a technique of the\nholographic renormalization group (RG) flow. It is conjectured that the\nextremal black hole space-time is holographically dual to the chiral two\ndimensional field theory. Our example is a typical four dimensional\nReissner-Nordstrom black hole, a system in which the M5-brane is wrapped on\nfour cycles of Calabi-Yau threefold. In five dimensional supergravity view\npoint this near horizon geometry is $AdS_3\\times S^2$, and three dimensional\ngravity coupled to moduli fields is effectively obtained after a dimensional\nreduction on $S^2$. Constructing the Hamilton-Jacobi equation, we define the\nholographic RG flow from the three dimensional gravity. The central charge of\nthe Virasoro algebra is calculable from the conformal anomaly at the point\nwhere the beta function defined from gravity side becomes zero. In general, we\ncan also identify the c-function of the dual two dimensional field theory. We\nshow that these flow equations are completely equivalent to not only BPS but\nalso non-BPS attractor flow equations of the muduli fields. The attractor\nmechanism by which the values of the moduli fields are fixed at the event\nhorizon of the extremal black hole can be understood equivalently to the fact\nthat the RG flows are fixed at the critical points in the dual field theory.",
        "category": "hep"
    },
    {
        "text": "Neutrino oscillations as a novel probe for a minimal length: We suggest that the presence of a quantum gravity induced minimal length can\nbe explored using neutrino oscillation probabilities. Neutrinos seem ideally\nsuited for this investigation because they can propagate freely over large\ndistances and can therefore pile up minimal length effects beyond detectable\nthresholds. We determine the modified survival probability in a scenario with a\nminimal length and find deviations from the classical behaviour for high\nenergies. We find that for the currently available experimental statistics the\ndeviations from the standard oscillations do only allow for a bound of\n$\\ell^{-1}\\gtrsim 10 \\mathrm{GeV}$ from MINOS data. On the other hand,\noscillations of high-energy neutrinos emitted by galactic and extragalactic\nsources are strongly suppressed, leading to a possible observation of quantum\ngravity effects at neutrino telescopes such as IceCube and ANTARES.",
        "category": "hep"
    },
    {
        "text": "Feasibility of the experimental study of $D_{s}^{\\ast}$ ${\\to}$\n  $\u03c6\u03c0$ decay: The current knowledge on the $D_{s}^{\\ast}$ meson are very limited. Besides\nthe dominant electromagnetic decays, the $D_{s}^{\\ast}$ weak decays are legal\nand offer the valuable opportunities to explore the wanted $D_{s}^{\\ast}$\nmeson. In this paper, the $D_{s}^{\\ast}$ ${\\to}$ ${\\phi}{\\pi}$ decay was\nstudied with the factorization approach. It is found that the branching ratio\n${\\cal B}(D_{s}^{\\ast}{\\to}{\\phi}{\\pi})$ ${\\sim}$ ${\\cal O}(10^{-7})$, which\ncorresponds to several thousands of events at the $e^{+}e^{-}$ collider\nexperiments including STCF, SuperKEKB, CEPC and FCC-ee, and several millions of\nevents at the hadron collider experiments, such as LHCb@HL-LHC. It is feasible\nto experimentally study the $D_{s}^{\\ast}$ ${\\to}$ ${\\phi}{\\pi}$ weak decay in\nthe future, even considering the identification efficiency.",
        "category": "hep"
    },
    {
        "text": "The quark-antiquark spectrum from upside down: We argue that the spectra of quark-antiquark systems should better be studied\nfrom higher radial excitations and, in particular, from configurations with\nwell-defined quantum numbers, rather than from ground states and lower radial\nexcitations, the most suitable system being charmonium.",
        "category": "hep"
    },
    {
        "text": "The gluon/charm content of the eta' meson and instantons: Motivated by recent CLEO measurements of the B-->\\eta' K decay, we evaluate\ngluon/charm content of the eta' meson using the interacting instanton liquid\nmodel of the QCD vacuum. Our result is very large due to the strong field of\nsmall-size instantons. We show that it provides quantitative explanations of\nthe CLEO data on the B-->\\eta' K decay rate (as well as inclusive process\nB-->\\eta' X), via a virtual Cabbibo-unsuppressed decay into \\bar c c pair which\nthen becomes eta'. If so, a significant charm component should be present in\nother hadrons also. In particular, we found a large contribution of the charmed\nquark in the polarised deep-inelastic scattering on a proton.",
        "category": "hep"
    },
    {
        "text": "Proton Decay in the Supersymmetric Grand Unified Models: In this article we review proton decay in the supersymmetric grand unified\nmodels.",
        "category": "hep"
    },
    {
        "text": "Massive spinning particle in any dimension. II. (Half-)integer spins: The general model of an arbitrary spin massive particle in any dimensional\nspace-time is derived on the basis of Kirillov - Kostant - Souriau approach.\n  Keywords: spinning particles, Poincar\\'e group, orbit method, constrained\ndynamics, geometric quantization.",
        "category": "hep"
    },
    {
        "text": "Holography and the speed of sound at high temperatures: We show that in a general class of strongly interacting theories at high\ntemperatures the speed of sound approaches the conformal value c_s^2=1/3\nuniversally from_below_. This class includes theories holographically dual to a\ntheory of gravity coupled to a single scalar field, representing the operator\nof the scale anomaly.",
        "category": "hep"
    },
    {
        "text": "Maximal Supersymmetry and B-Mode Targets: Extending the work of Ferrara and one of the authors, we present dynamical\ncosmological models of $\\alpha$-attractors with plateau potentials for\n$3\\alpha=1,2,3,4,5,6,7$. These models are motivated by geometric properties of\nmaximally supersymmetric theories: M-theory, superstring theory, and maximal $N\n= 8$ supergravity. After a consistent truncation of maximal to minimal\nsupersymmetry in a seven-disk geometry, we perform a two-step procedure: 1) we\nintroduce a superpotential, which stabilizes the moduli of the seven-disk\ngeometry in a supersymmetric minimum, 2) we add a cosmological sector with a\nnilpotent stabilizer, which breaks supersymmetry spontaneously and leads to a\ndesirable class of cosmological attractor models. These models with $n_s$\nconsistent with observational data, and with tensor-to-scalar ratio $r \\approx\n10^{-2}- 10^{-3}$, provide natural targets for future B-mode searches. We\nrelate the issue of stability of inflationary trajectories in these models to\ntessellations of a hyperbolic geometry.",
        "category": "hep"
    },
    {
        "text": "Dynamical Stability of Six-dimensional Warped Flux Compactification: We show the dynamical stability of a six-dimensional braneworld solution with\nwarped flux compactification recently found by the authors. We consider linear\nperturbations around this background spacetime, assuming the axisymmetry in the\nextra dimensions. The perturbations are expanded by scalar-, vector- and\ntensor-type harmonics of the four-dimensional Minkoswki spacetime and we\nanalyze each type separately. It is found that there is no unstable mode in\neach sector and that there are zero modes only in the tensor sector,\ncorresponding to the four-dimensional gravitons. We also obtain the first few\nKaluza-Klein modes in each sector.",
        "category": "hep"
    },
    {
        "text": "Three point interaction of Dirac fermions with higher spin particles and\n  discrete symmetries: We constructed all possible kinematically allowed three-point interactions of\ntwo massless Dirac spinors with massive higher-spin bosons. In any $D$\nspacetime, the interactions have been constructed using the projections of the\nmassive higher spin representations of $Spin(D-1)$ over the massless complex\nspinor representations of $Spin(D-2)\\times Spin(D-2)$. Based on this analysis,\nwe have further classified the space of theories involving one massless Dirac\nspinor and a single (or multiple) massive higher spins based on the discrete\nsymmetries: $C,\\, R,$ and $ T$. We found that in any $D=2m+1/2m$, the\ninteracting theories of a single massive higher spin have a \\enquote{$m$} mod\n$2$ (or $D$ mod $4$) classification.",
        "category": "hep"
    },
    {
        "text": "A Search of Low-Mass WIMPs with p-type Point Contact Germanium Detector\n  in the CDEX-1 Experiment: The CDEX-1 experiment conducted a search of low-mass (< 10 GeV/c2) Weakly\nInteracting Massive Particles (WIMPs) dark matter at the China Jinping\nUnderground Laboratory using a p-type point-contact germanium detector with a\nfiducial mass of 915 g at a physics analysis threshold of 475 eVee. We report\nthe hardware set-up, detector characterization, data acquisition and analysis\nprocedures of this experiment. No excess of unidentified events are observed\nafter subtraction of known background. Using 335.6 kg-days of data, exclusion\nconstraints on the WIMP-nucleon spin-independent and spin-dependent couplings\nare derived.",
        "category": "hep"
    },
    {
        "text": "Background to Higgs-boson searches from internal conversions of\n  off-shell photons associated with $Z/\u03b3^*$-boson production at the LHC: This paper presents the studies of the background contribution to the $H\n\\rightarrow 4l$ searches originating from the processes of off-shell (virtual)\nphoton emissions and their conversions into lepton pairs accompanying the\nproduction of $Z/ \\gamma ^*$-bosons at the LHC. They extend the analyses of the\nirreducible background presented in the ATLAS and CMS Higgs papers by taking\ninto account the emissions of off-shell photons by parton showers. Including\nthese effects does not change significantly the Higgs-searches background\nlevel, provided that the transverse momentum of each of the final-state leptons\nis restricted to the range of $p_{T, l} > 7$ GeV. In the kinematical region\nextended towards lower lepton transverse momenta the parton-shower contribution\nbecomes important. A measurement method for pinning down the parton-shower\neffects is proposed.",
        "category": "hep"
    },
    {
        "text": "On Bound-State beta^- Decay Rate of the Free Neutron: We calculate the bound-state beta^- decay rate of the free neutron. We show\nthat hydrogen in the final state of the decay is produced with a probability of\nabout 99% in the hyperfine state with zero orbital l = 0 and atomic angular\nmomentum F = 0.",
        "category": "hep"
    },
    {
        "text": "Where does curvaton reside? Differences between bulk and brane frames: Some classes of inflationary models naturally introduce two distinct\nmetrics/frames, and their equivalence in terms of observables has often been\nput in question. D-brane inflation proposes candidates for an inflaton embedded\nin the string theory and possesses descriptions on the brane and bulk\nmetrics/frames, which are connected by a conformal/disformal transformation\nthat depends on the inflaton and its derivatives. It has been shown that\ncurvature perturbations generated by the inflaton are identical in both frames,\nmeaning that observables such as the spectrum of cosmic microwave background\n(CMB) anisotropies are independent of whether matter fields---including those\nin the standard model of particle physics---minimally couple to the brane or\nthe bulk metric/frame. This is true despite the fact that the observables are\neventually measured by the matter fields and that the total action including\nthe matter fields is different in the two cases. In contrast, in curvaton\nscenarios, the observables depend on the frame to which the curvaton minimally\ncouples. Among all inflationary scenarios, we focus on two models motivated by\nthe KKLMMT fine-tuning problem: a slow-roll inflation with an inflection-point\npotential and a model of a rapidly rolling inflaton that conformally couples to\ngravity. In the first model, the difference between the frames in which the\ncurvaton resides is encoded in the spectral index of the curvature\nperturbations, depicting the nature of the frame transformation. In the second\nmodel, the curvaton on the brane induces a spectral index significantly\ndifferent from that in the bulk and is even falsified by the observations. This\nwork thus demonstrates that two frames connected by a conformal/disformal\ntransformation lead to different physical observables such as CMB anisotropies\nin curvaton models.",
        "category": "hep"
    },
    {
        "text": "In Memoriam Nikolai Uraltsev : Uraltsev's and other Sum Rules, Theory\n  and Phenomenology of $D^{**}$'s: We first discuss Uraltsev's and other sum rules constraining the $B \\to\nD^{**}(L=1)$ weak transitions in the infinite mass limit, and compare them with\ndynamical approaches in the same limit. After recalling these well established\nfacts, we discuss how to apply infinite mass limit to the physical situation.\nWe provide predictions concerning semi-leptonic decays and non-leptonic ones,\nbased on quark models. We then present in more detail the dynamical approaches:\nthe relativistic quark model \\`a la Bakamjian-Thomas and lattice QCD. We\nsummarise lattice QCD results in the infinite mass limit and compare them to\nthe quark model predictions. We then present preliminary lattice QCD results\nwith finite $b$ and $c$ quark masses. A systematic comparison between theory\nand experiment is performed. We show that some large discrepancies exist\nbetween different experiments. Altogether the predictions at infinite mass are\nin fair agreement with experiment for non-leptonic decays contrary to what\nhappens for semileptonic decays. We conclude by considering the prospects to\nclarify both the experimental situation, the theoretical one and the comparison\nbetween both.",
        "category": "hep"
    },
    {
        "text": "Vortex waistlines and long range fluctuations: We examine the manner in which a linear potential results from fluctuations\ndue to vortices linked with the Wilson loop. Our discussion is based on exact\nrelations and inequalities between the Wilson loop and the vortex and electric\nflux order parameters. We show that, contrary to the customary naive picture,\nonly vortex fluctuations of thickness of the order of the spatial linear size\nof the loop are capable of producing a strictly linear potential. An effective\ntheory of these long range fluctuations emerges naturally in the form of a\nstrongly coupled Z(N) lattice gauge theory. We also point out that dynamical\nfermions introduced in this medium undergo chiral symmetry breaking.",
        "category": "hep"
    },
    {
        "text": "The bound state corrections to the semileptonic decays of the heavy\n  baryons: We present an investigation of the lepton energy distributions in the\ninclusive semileptonic weak decays of heavy baryons performed within a\nrelativistic quark model formulated on the light front (LF). Using the\nheavy-quark LF distribution functions related to the equal time momentum wave\nfunctions taken from the Kalman--Tran--D'Souza model we compute the electron\nenergy spectra and the total semileptonic widths of the Lambda_Q and Xi_Q\n(Q=c,b) baryons and confront the results with existing data.",
        "category": "hep"
    },
    {
        "text": "Color-neutral heavy particle production in nucleus-nucleus collisions in\n  the quasi-classical approximation: We use a diagrammatic approach to study color-neutral heavy particle\nproduction in nucleus-nucleus collisions in a quasi-classical approximation\nwithout small-$x$ evolution. In order to treat the two nuclei symmetrically, we\nuse the Coulomb gauge which gives the appropriate light cone gauge for each\nnucleus. The resulting cross section is factorized into a product of two\nWeizs\\\"{a}cker-Williams gluon distributions of the two nuclei when the\ntransverse momentum of the produced scalar particle is around the saturation\nmomentum. We confirm our results in covariant gauge where the transverse\nmomentum broadening of hard gluons can be described as a diffusion process. The\ntransverse momentum factorization manifests itself in light cone gauge but not\nso clearly in covariant gauge.",
        "category": "hep"
    },
    {
        "text": "The spatial string tension and dimensional reduction in QCD: The spatial string tension for 3+1 dimensional QCD at finite temperature is\nmeasured. The gauge configurations we re generated with two light and one\nheavier strange quark on lattices of size $16^3 4$ and $24^3 6$. This spatial\nstring tension is compared with the string tension of the 3 dimensional pure\ngauge theory together with the temperature dependent 2-loop running coupling.\nFurther comparison is made with predictions from dimensionally reduced\neffective theories.",
        "category": "hep"
    },
    {
        "text": "The Color Glass Condensate and Glasma: These two lectures concern the Color Glass Condensate and the Glasma. These\nare forms of matter which might be studied in high energy hadronic collisions.\nThe Color Glass Condensate is high energy density gluonic matter. It\nconstitutes the part of a hadron wavefunction important for high energy\nprocesses. The Glasma is matter produced from the collision of two high energy\nhadrons. Both types of matter are associated with coherent fields. The Color\nGlass Condensate is static and related to a hadron wavefunction where the\nglasma is transient and evolves quickly after a collision. I present the\nproperties of such matter, and some aspects of what is known of their\nproperties.",
        "category": "hep"
    },
    {
        "text": "Dynamical Gap and Cuprate-like Physics from Holography: We study the properties of fermion correlators in a boundary theory dual to\nthe Reissner-Nordstr\\\"om AdS_{d+1} background in the presence of a bulk dipole\n(Pauli) interaction term with strength p. We show that by simply changing the\nvalue of the parameter p we can tune continuously from a Fermi liquid (small\np), to a marginal Fermi liquid behavior at a critical value of p, to a generic\nnon-Fermi liquid at intermediate values of p, and finally to a Mott insulator\nat large values of the bulk Pauli coupling. As all of these phases are seen in\nthe cuprate phase diagram, the holographic model we study has the key elements\nof the strong coupling physics typified by Mott systems. In addition, we extend\nour analysis to finite temperature and show that the Mott gap closes. Of\nparticular interest is that it closes when the ratio of the gap to the critical\ntemperature is of the order of ten. This behavior is very much similar to that\nobserved in the classic Mott insulator VO_2. We then analyze the\nnon-analyticities of the boundary theory fermion correlators for generic values\nof frequency and momentum by calculating the quasi-normal modes of the bulk\nfermions. Not surprisingly, we find no evidence for the dipole interaction\ninducing an instability in the boundary theory. Finally, we briefly consider\nthe introduction of superconducting condensates, and find that in that case,\nthe fermion gap is driven by scalar-fermion couplings rather than by the Pauli\ncoupling.",
        "category": "hep"
    },
    {
        "text": "ABJM at finite $N$ via 4d supergravity: We apply the conjecture of arXiv:2111.06903 for gravitational building blocks\nto the effective supergravity description of M-theory on S$^7/\\mathbb{Z}_k$.\nUtilizing known localization results for the holographically dual ABJM theory,\nwe determine a complete tower of higher derivative corrections to the AdS$_4$\nsupergravity and a further set of quantum corrections. This uniquely fixes the\ngravitational block, leading to holographic predictions for a number of exact\nABJM observables, excluding only constant and non-perturbative corrections in\nthe gauge group rank $N$. The predicted S$^3$ partition function is an Airy\nfunction that reproduces previous results and generalizes them to include\narbitrary squashing and mass deformations/R-charge assignments. The\ntopologically twisted and superconformal indices are instead products of two\ndifferent Airy functions, in agreement with direct numeric calculations in the\nunrefined limit of the former object. The general fixed-point formula for an\narbitrary supersymmetric background is similarly given as a product of Airy\nfunctions.",
        "category": "hep"
    },
    {
        "text": "Tetra-quark mesons with exotic quantum numbers: Tetra-quark mesons with exotic quantum numbers, their production rates and\ndecay properties are studied, because they are useful to establish existence of\ntetra-quark mesons.",
        "category": "hep"
    },
    {
        "text": "Light-front potential for heavy quarkonia constrained by the holographic\n  soft-wall model: We derive a light-front Schrodinger-type equation of motion for the\nquark-antiquark wave function of heavy quarkonia imposing constraints from the\nholographic soft-wall model.",
        "category": "hep"
    },
    {
        "text": "Supersymmetric Dark Matter - a Review: I address the question of whether supersymmetry provides a viable candidate\nfor the dark matter in the Universe. I review the properties of the lightest\nneutralino as a candidate for solving the dark matter problem. I discuss the\nneutralino's phenomenological and cosmological properties, and constraints from\npresent and future experiments. In the minimal supersymmetric model, the\nneutralino mass has been experimentally excluded below some $20$ GeV, and is\nnot expected to be significantly larger than about $150$ GeV. I identify a\ngaugino-like neutralino as the most natural dark matter candidate for a\nplausible range of parameters. The requirement that the lightest neutralino be\nthe dominant matter component in the flat Universe provides non-trivial\nrestrictions on other parameters of the model, in particular on the masses of\nthe sfermions. Next, I study the consequences of adopting further grand\nunification assumptions. In both scenarios I find sfermion masses most likely\nbeyond the reach of LEP 200 and the Tevatron but well within the discovery\npotential of the SSC and the LHC. I also comment on the effects of relaxing\ngrand unification assumptions. Finally, I briefly outline prospects for the\nneutralino dark matter searches.",
        "category": "hep"
    },
    {
        "text": "First-Order Gauge Invariant Generalization of the Quantum Rigid Rotor: A first-order gauge invariant formulation for the two-dimensional quantum\nrigid rotor is long known in the theoretical physics community as an isolated\npeculiar model. Parallel to that fact, the longstanding constraints\nabelianization problem, aiming at the conversion from second to first class\nsystems for quantization purposes, has been approached a number of times in the\nliterature with a handful of different forms and techniques and still continues\nto be a source of lively and interesting discussions. Connecting these two\npoints, we develop a new systematic method for converting second class systems\nto first class ones, valid for a class of systems encompassing the quantum\nrigid rotor as a special case. In particular the gauge invariance of the\nquantum rigid rotor is fully clarified and generalized in the context of\narbitrary translations along the radial momentum direction. Our method differs\nsubstantially from previous ones as it does not rely neither on the\nintroduction of new auxiliary variables nor on the a priori interpretation of\nthe second class constraints as coming from a gauge-fixing process.",
        "category": "hep"
    },
    {
        "text": "Phenomenological Analyses on Hadronic Cross-Sections at High and\n  Asymptotic Energies: Quantum Chromodynamics constitutes the quantum field theory of the strong\ninteraction. Despite the success of this theory in the description of several\nhadronic processes, the elastic scattering is still a theoretical challenge.\nThis process is characterized by a small transferred momentum and the\nperturbative techniques are not applicable. Although nonperturbative results\nhave been obtained in recent years, we still do not have a full description\nwithin QCD of the quantities related to the elastic scattering, for example,\n$\\sigma_{tot}$, the $\\rho$ parameter and $\\sigma_{el}$. In this thesis, the\nmain interest is in the energy dependence of the ratio\n$X=\\sigma_{el}/\\sigma_{tot}$, $\\sigma_{tot}$ and $\\rho$. These topics are\ndivided into three different studies. In the first topic, we develop an\nempirical analysis on the ratio $X$. By means of parameterizations with a small\nnumber of free parameters, we have obtained good descriptions of the data on\n$pp$ and $\\bar{p}p$ scattering. We conclude that the asymptotic black-disk\nscenario is not a unique solution and the results favour a grey-disk scenario.\nIn the second topic, we study the rise of $\\sigma_{tot}$ with the energy\nthrough parameterizations based on the Regge-Gribov formalism and we consider\ntwo options for the leading term: a log-square and a log-raised-to-$\\gamma$,\nwith $\\gamma$ a free fit parameter. We discuss two analytic methods to connect\nthe real and imaginary parts of the amplitude: Derivative Dispersion Relations\n(DDR) and Asymptotic Uniqueness, which lead to different parameterizations for\n$\\sigma_{tot}$ and $\\rho$. The results favour the DDR method in both formal and\npractical contexts. In the third topic, two sub-leading terms for\n$\\sigma_{tot}$, obtained in a nonperturbative QCD approach, are considered in\nfits to $pp$ and $\\bar{p}p$ data and also in fits to data from meson-baryon and\nother baryon-baryon scattering.",
        "category": "hep"
    },
    {
        "text": "Supersymmetry breaking in ISS coupled to gravity: We analyse the breakdown of supersymmetry in an ISS model in the presence of\ngravity, under the requirement that the cosmological constant vanishes\ndynamically. The gravitational backreaction is calculated in the metastable\nminimum and, in conjuction with the condition V=0, this is shown to generate\nnon-zero F-terms for the squarks. Once the squarks are coupled to the messenger\nsector, a gauge mediation scheme is realised and it leads to a distinctive soft\nspectrum, with a two order of magnitude split between the gaugino and the soft\nscalar masses.",
        "category": "hep"
    },
    {
        "text": "Forward production of $\u03a5$ mesons in $pp$ collisions at\n  $\\sqrt{s}=7$ and 8TeV: The production of $\\Upsilon$ mesons in $pp$ collisions at $\\sqrt=7$ and\n$8\\,\\mathrm{TeV}$ is studied with the LHCb detector using data samples\ncorresponding to an integrated luminosity of $1\\,\\mathrm{fb}^{-1}$ and\n$2\\,\\mathrm{fb}^{-1}$ respectively. The production cross-sections and ratios of\ncross-sections are measured as functions of the meson transverse momentum $p_T$\nand rapidity $y$, for $p_T<30\\,\\mathrm{GeV}/c$} and $2.0<y<4.5$.",
        "category": "hep"
    },
    {
        "text": "QCD monopoles, abelian projections and gauge invariance: It is shown that the creation of a monopole is a gauge invariant statement,\nbased on topology. Creating a monopole is independent on the abelian projection\nin which it is created. This is fundamental in defining an order parameter for\ndetecting dual superconductivity of the QCD vacuum.",
        "category": "hep"
    },
    {
        "text": "Light Higgses and Dark Matter at Bottom and Charm Factories: Neither Dark Matter nor scalar particles in the Higgs sector are ruled out at\nenergies accessible to bottom and charm factories. In Dark Matter searches, the\nerror on the mass of Dark Matter is $\\sim 4$ GeV in the best LHC studies. For\nlight Dark Matter this could represent a 100% (or more) error. In Higgs\nsearches, the presence of a light singlet Higgs can make the LHC Higgs search\ndifficult, if not impossible. If Dark Matter or a Higgs scalar is light, it\nwill {\\it require} a low-energy machine to precisely determine the couplings.\nWe review the models, modes of discovery and rate expectations for these new\nparticle searches at bottom and charm factories. We also discuss the options\nfor new runs at bottom and charm factories relevant for these searches.",
        "category": "hep"
    },
    {
        "text": "Some aspects of final states and QCD evolution equations: In order to study such effects like parton saturation in final states at the\nLHC one of the approaches is to combine physics of the BK and the CCFM\nevolution equations. We report on recently obtained resummed form of the BK\nequation and nonlinear extension of the CCFM equation - the KGBJS equation.",
        "category": "hep"
    },
    {
        "text": "Scattering of shock waves in QCD: The cross section of heavy-ion collisions is represented as a double\nfunctional integral with the saddle point being the classical solution of the\nYang-Mills equations with boundary conditions/sources in the form of two shock\nwaves corresponding to the two colliding ions. I develop the expansion of this\nclassical solution in powers of the commutator of the Wilson lines describing\nthe colliding particles and calculate the first two terms of the expansion.",
        "category": "hep"
    },
    {
        "text": "Comments on lump solutions in SFT: We analyze a recently proposed scheme to construct analytic lump solutions in\nopen SFT. We argue that in order for the scheme to be operative and guarantee\nbackground independence it must be implemented in the same 2D conformal field\ntheory in which SFT is formulated. We outline and discuss two different\npossible approaches. Next we reconsider an older proposal for analytic lump\nsolutions and implement a few improvements. In the course of the analysis we\nformulate a distinction between regular and singular gauge transformations and\nadvocate the necessity of defining a topology in the space of string fields.",
        "category": "hep"
    },
    {
        "text": "Very low energy matching of effective meson theories with QCD: A simple matching procedure is proposed to extract constraints on effective\nmeson theories. In this way, a QCD prediction for the pion decay constant is\nfound, F(pi)=2 m(pi)/pi, i.e. approximately 90MeV. The same procedure also\ndetermines other mesonic observables, like the decay width of the sigma meson\nto two photons. Finally, some information which can be gained about the\nhadronic light-by-light contributions to the muon anomalous moment are briefly\ncommented.",
        "category": "hep"
    },
    {
        "text": "Matrix model approach to minimal Liouville gravity revisited: Using the connection with the Frobenius manifold structure, we study the\nmatrix model description of minimal Liouville gravity (MLG) based on the\nDouglas string equation. Our goal is to find an exact discrete formulation of\nthe (q,p) MLG model that intrinsically contains information about the conformal\nselection rules. We discuss how to modify the Frobenius manifold structure\nappropriately for this purposes. We propose a modification of the construction\nfor Lee-Yang series involving the $A_{p-1}$ algebra instead of the previously\nused $A_1$ algebra. With the new prescription, we calculate correlators on the\nsphere up to four points and find full agreement with the continuous approach\nwithout using resonance transformations.",
        "category": "hep"
    },
    {
        "text": "A Pseudoscalar Resonance That Could Resemble the Higgs: As described previously, in SU(5) gauge theory with massless left-handed $\n{\\bf 5 \\oplus 15 \\oplus 40 \\oplus 45^*}$ fermions \\{QUD\\}, an S-Matrix is\nproduced by infra-red anomaly dynamics that might provide an extraordinarily\neconomic origin and unification for the Standard Model. All particles are\nbound-states, with dynamically generated masses, and there is no Higgs sector.\nIn this paper, the radically different dynamical role played by the top quark\nis elaborated. It does not reproduce Standard Model \"$ t\\bar{t} $\" events but,\ninstead, these events are reproduced by the multiple vector boson decays of the\n$\\eta_6$ - the remnant pseudoscalar resonance left by color sextet electroweak\nsymmetry breaking. Evidence that the $\\eta_6$ appears in LHC and Tevatron Z\npair cross-sections is discussed. A second pseudoscalar resonance, the\n$\\eta_3$, contains a $t\\bar{t}$ pair and mixes with the $\\eta_6$ via the\npomeron. The mixing should give the $\\eta_3$ a mass between the triplet and\nsextet scales. It could also have a decay mode pattern that is more consistent\nwith LHC and Tevatron results than the (mass spectrum determined) pattern of\nthe Standard Model Higgs boson that many hope has been discovered.\nUnfortunately, at present, there is no possibility to calculate explicit\ncross-sections.",
        "category": "hep"
    },
    {
        "text": "Towards M2-brane Theories for Generic Toric Singularities: We construct several examples of (2+1) dimensional N=2 supersymmetric\nChern-Simons theories, whose moduli space is given by non-compact toric\nCalabi-Yau four-folds, which are not derivable from any (3+1) dimensional CFT.\nOne such example is the gauge theory associated with the cone over Q^{111}. For\nseveral examples, we explicitly confirm the matter content, superpotential\ninteractions and RG flows suggested by crystal models. Our results provide\nadditional support to the idea that crystal models are relevant for describing\nthe structure of these CFTs.",
        "category": "hep"
    },
    {
        "text": "Flavour data constraints on new physics and SuperIso: We discuss the implications of B_s -> mu+mu- and B -> K*mu+mu- decays in the\ncontext of indirect searches for new physics, emphasising the new LHCb results.\nIn particular, we derive the consequences of the MFV hypothesis and discuss the\nimportance of the MFV predictions. The impact of the recent LHCb measurements\nin the context of the MSSM will also be addressed, and the SuperIso program\nwill be briefly described.",
        "category": "hep"
    },
    {
        "text": "Transverse Single-Spin Asymmetries of Midrapidity Direct Photons and\n  Neutral Mesons at PHENIX: Results are presented for the transverse single-spin asymmetries of direct\nphotons, neutral pions, and eta mesons for $|\\eta|<0.35$ from $p^\\uparrow + p$\ncollisions with $\\sqrt{s} = 200$ GeV at PHENIX. As hadrons, $\\pi^0$ and $\\eta$\nmesons are sensitive to both initial- and final-state effects and at\nmidrapidity probe the dynamics of gluons along with a mix of quark flavors.\nBecause direct photon production does not include hadronization, the direct\nphoton TSSA is only sensitive to initial-state effects and at midrapidity\nprovides a clean probe of the gluon dynamics in transversely polarized protons.\nAll three of these results will help constrain the collinear twist-3 trigluon\ncorrelation function as well as the gluon Sivers function, improving our\nknowledge of spin-dependent gluon dynamics in QCD.",
        "category": "hep"
    },
    {
        "text": "Anisotropic pressure induced by finite-size effects in SU(3) Yang-Mills\n  theory: We study the pressure anisotropy in anisotropic finite-size systems in SU(3)\nYang-Mills theory at nonzero temperature. Lattice simulations are performed on\nlattices with anisotropic spatial volumes with periodic boundary conditions.\nThe energy-momentum tensor defined through the gradient flow is used for the\nanalysis of the stress tensor on the lattice. We find that a clear finite-size\neffect in the pressure anisotropy is observed only at a significantly shorter\nspatial extent compared with the free scalar theory, even when accounting for a\nrather large mass in the latter.",
        "category": "hep"
    },
    {
        "text": "Searches for magnetic monopoles and others stable massive particles: The Standard Model (SM) of the microcosm provides an excellent description of\nthe phenomena of the microcosm, with the triumph of the discovery of the Higgs\nboson. There are many reasons, however, to believe that the SM is incomplete\nand represents a valid theory at relatively low energies only. Of particular\ninterest are the models based on complete symmetries, such as those attempting\na true unification between leptons and quarks in terms of a single symmetry\ngroup (Grand Unified Theories, GUTs) and those attempting unification between\nfermions and bosons, such as the supersymmetry. This chapter is devoted to the\ndescription of stable and massive particles not predicted within the SM, their\nenergy loss mechanisms and their searches in the cosmic radiation. The\nstability of these particles means that if they were produced at any time in\nthe thermal history of the Universe, they would still be present as relic\nparticles. Examples of stable massive particles discussed in this chapter\ninclude magnetic monopoles, strange quark matter and supersymmetric particles.\nIn particular, we focus on the status of searches for magnetic monopoles (also\ninducing proton-decay processes), nuclearites and Q-balls in neutrino\ntelescopes.",
        "category": "hep"
    },
    {
        "text": "On $d=4$ Yang-Mills instantons in a spherically symmetric background: We present arguments for the existence of self-dual Yang-Mills instantons for\nseveral spherically symmetric backgrounds with Euclidean signature. The\ntime-independent Yang-Mills field has finite action and a vanishing energy\nmomentum tensor and does not disturb the geometry. We conjecture the existence\nof similar solutions for any nonextremal SO(3)-spherically symmetric\nbackground.",
        "category": "hep"
    },
    {
        "text": "Search for axion-like dark matter with ferromagnets: Existence of dark matter indicates the presence of unknown fundamental laws\nof nature. Ultralight axion-like particles are well-motivated dark matter\ncandidates, emerging naturally from theories of physics at ultrahigh energies.\nWe report the results of a direct search for the electromagnetic interaction of\naxion-like dark matter in the mass range that spans three decades from 12 peV\nto 12 neV. The detection scheme is based on a modification of Maxwell's\nequations in the presence of axion-like dark matter, which mixes with a static\nmagnetic field to produce an oscillating magnetic field. The experiment makes\nuse of toroidal magnets with iron-nickel alloy ferromagnetic powder cores,\nwhich enhance the static magnetic field by a factor of 24. Using SQUIDs, we\nachieve a magnetic sensitivity of 150 $\\text{aT}/\\sqrt{\\text{Hz}}$, at the\nlevel of the most sensitive magnetic field measurements demonstrated with any\nbroadband sensor. We recorded 41 hours of data and improved the best limits on\nthe magnitude of the axion-like dark matter electromagnetic coupling constant\nover part of our mass range, at 20 peV reaching $4.0 \\times 10^{-11}\n\\text{GeV}^{-1}$ (95\\% confidence level). Our measurements are starting to\nexplore the coupling strengths and masses of axion-like particles where mixing\nwith photons could explain the anomalous transparency of the universe to TeV\ngamma-rays.",
        "category": "hep"
    },
    {
        "text": "Electron and photon energy calibration with the ATLAS detector using\n  2015-2016 LHC proton-proton collision data: This paper presents the electron and photon energy calibration obtained with\nthe ATLAS detector using about 36 fb$^{-1}$ of LHC proton-proton collision data\nrecorded at $\\sqrt{s}=13$ TeV in 2015 and 2016. The different calibration steps\napplied to the data and the optimization of the reconstruction of electron and\nphoton energies are discussed. The absolute energy scale is set using a large\nsample of $Z$ boson decays into electron--positron pairs. The systematic\nuncertainty in the energy scale calibration varies between 0.03% to 0.2% in\nmost of the detector acceptance for electrons with transverse momentum close to\n45 GeV. For electrons with transverse momentum of 10 GeV the typical\nuncertainty is 0.3% to 0.8% and it varies between 0.25% and 1% for photons with\ntransverse momentum around 60 GeV. Validations of the energy calibration with\n$J/\\psi \\rightarrow e^+e^-$ decays and radiative $Z$ boson decays are also\npresented.",
        "category": "hep"
    },
    {
        "text": "Twofold Transition in PT-Symmetric Coupled Oscillators: The inspiration for this theoretical paper comes from recent experiments on a\nPT-symmetric system of two coupled optical whispering galleries (optical\nresonators). The optical system can be modeled as a pair of coupled linear\noscillators, one with gain and the other with loss. If the coupled oscillators\nhave a balanced loss and gain, the system is described by a Hamiltonian and the\nenergy is conserved. This theoretical model exhibits two PT transitions\ndepending on the size of the coupling parameter \\epsilon. For small \\epsilon\nthe PT symmetry is broken and the system is not in equilibrium, but when\n\\epsilon becomes sufficiently large, the system undergoes a transition to an\nequilibrium phase in which the PT symmetry is unbroken. For very large \\epsilon\nthe system undergoes a second transition and is no longer in equilibrium. The\nclassical and the quantized versions of the system exhibit transitions at\nexactly the same values of \\epsilon.",
        "category": "hep"
    },
    {
        "text": "Cosmological Inflation and the Quantum Measurement Problem: According to cosmological inflation, the inhomogeneities in our universe are\nof quantum mechanical origin. This scenario is phenomenologically very\nappealing as it solves the puzzles of the standard hot big bang model and\nnaturally explains why the spectrum of cosmological perturbations is almost\nscale invariant. It is also an ideal playground to discuss deep questions among\nwhich is the quantum measurement problem in a cosmological context. Although\nthe large squeezing of the quantum state of the perturbations and the\nphenomenon of decoherence explain many aspects of the quantum to classical\ntransition, it remains to understand how a specific outcome can be produced in\nthe early universe, in the absence of any observer. The Continuous Spontaneous\nLocalization (CSL) approach to quantum mechanics attempts to solve the quantum\nmeasurement question in a general context. In this framework, the wavefunction\ncollapse is caused by adding new non linear and stochastic terms to the\nSchroedinger equation. In this paper, we apply this theory to inflation, which\namounts to solving the CSL parametric oscillator case. We choose the\nwavefunction collapse to occur on an eigenstate of the Mukhanov-Sasaki variable\nand discuss the corresponding modified Schroedinger equation. Then, we compute\nthe power spectrum of the perturbations and show that it acquires a universal\nshape with two branches, one which remains scale invariant and one with nS=4, a\nspectral index in obvious contradiction with the Cosmic Microwave Background\n(CMB) anisotropy observations. The requirement that the non-scale invariant\npart be outside the observational window puts stringent constraints on the\nparameter controlling the deviations from ordinary quantum mechanics...\n(Abridged).",
        "category": "hep"
    },
    {
        "text": "$\u03c8'$ Polarization due to Color-Octet Quarkonia Production: We calculated the polarization of \\psi' due to gg \\to Q\\bar{Q}[^3P_J^(8)]g\n\\to \\psi^\\lambda color-octet quarkonia production. We find that at low\ntransverse momenta the \\psi' is unpolarized due to the contributions\nproportional to the L=S=0 and L=S=1 color-octet matrix elements. As p_\\perp\nincreases, the \\psi' mesons become 100% polarized, as predicted by\nfragmentation calculations. Polarization due to lowest order color-singlet\nproduction is also considered, which qualitatively has a similar shape to the\ncolor-octet production.",
        "category": "hep"
    },
    {
        "text": "Horizon as Critical Phenomenon: We show that renormalization group(RG) flow can be viewed as a gradual wave\nfunction collapse, where a quantum state associated with the action of field\ntheory evolves toward a final state that describes an IR fixed point. The\nprocess of collapse is described by the radial evolution in the dual\nholographic theory. If the theory is in the same phase as the assumed IR fixed\npoint, the initial state is smoothly projected to the final state. If in a\ndifferent phase, the initial state undergoes a phase transition which in turn\ngives rise to a horizon in the bulk geometry. We demonstrate the connection\nbetween critical behavior and horizon in an example, by deriving the bulk\nmetrics that emerge in various phases of the U(N) vector model in the large N\nlimit based on the holographic dual constructed from quantum RG. The gapped\nphase exhibits a geometry that smoothly ends at a finite proper distance in the\nradial direction. The geometric distance in the radial direction measures a\ncomplexity : the depth of RG transformation that is needed to project the\ngenerally entangled UV state to a direct product state in the IR. For gapless\nstates, entanglement persistently spreads out to larger length scales, and the\ninitial state can not be projected to the direct product state. The obstruction\nto smooth projection at charge neutral point manifests itself as the long\nthroat in the anti-de Sitter space. The Poincare horizon at infinity marks the\ncritical point which exhibits a divergent length scale in the spread of\nentanglement. For the gapless states with non-zero chemical potential, the bulk\nspace becomes the Lifshitz geometry with the dynamical critical exponent two.\nThe identification of horizon as critical point may provide an explanation for\nthe universality of horizon. We also discuss the structure of the bulk tensor\nnetwork that emerges from the quantum RG.",
        "category": "hep"
    },
    {
        "text": "Physics at the Photon Linear Collider: The physics prospects of the high energy Photon Linear Collider are reviewed,\nemphasizing its potential to study the symmetry breaking sector, including\nHiggs searches and precision anomalous W couplings measurements.",
        "category": "hep"
    },
    {
        "text": "Hard exclusive electroproduction of two pions and their resonances: We study the hard exclusive production of two pions in the virtual photon\nfragmentation region with various invariant masses including the resonance\nregion. The amplitude is expressed in terms of two-pion light cone distribution\namplitudes ($2\\pi$DA's). We derive dispersion relations for these amplitudes,\nwhich enables us to fix them completely in terms of $\\pi\\pi$ scattering phases\nand a few low-energy subtraction constants determind by the effective chiral\nlagrangian. Quantitative estimates of the resonance as well $\\pi\\pi$ background\nDA's at low normalization point are made. We also prove certain new soft pion\ntheorem relating two-pion DA's to the one-pion DA. Crossing relations between\n$2\\pi$DA's and parton distributions in a pion are discussed.\n  We demontrate that by studying the shape of the $\\pi\\pi$ mass spectra (not\nabsolute cross section!) in a diffractive electroproduction one can extract the\ndeviation of the meson ($\\pi,\\rho,$ etc.) wave functions from their asymptotic\nform $6 z(1-z)$ and hence to get important information about the structure of\nmesons. Also we discuss how the moments of quark distributions in a pion can be\nmeasured in the hard diffraction. We suggest (alternative to S\\\"oding's)\nparametrization of $\\pi\\pi$ spectra which is suitable for large photon\nvirtuality.",
        "category": "hep"
    },
    {
        "text": "Boundary-to-bulk maps for AdS causal wedges and RG flow: We consider the problem of defining spacelike-supported boundary-to-bulk\npropagators in AdS$_{d+1}$ down to the unitary bound $\\Delta=(d-2)/2$. That is\nto say, we construct the `smearing functions' $K$ of HKLL but with different\nboundary conditions where both dimensions $\\Delta_+$ and $\\Delta_-$ are taken\ninto account. More precisely, we impose Robin boundary conditions, which\ninterpolate between Dirichlet and Neumann boundary conditions and we give\nexplicit expressions for the distributional kernel $K$ with spacelike support.\nThis flow between boundary conditions is known to be captured in the boundary\nby adding a double-trace deformation to the CFT. Indeed, we explicitly show\nthat using $K$ there is a consistent and explicit map from a Wightman function\nof the boundary QFT to a Wightman function of the bulk theory. In order to\naccomplish this we have to study first the microlocal properties of the\nboundary two-point function of the perturbed CFT and prove its wavefront set\nsatisfies the microlocal spectrum condition. This permits to assert that $K$\nand the boundary two-point function can be multiplied as distributions.",
        "category": "hep"
    },
    {
        "text": "Improved AdS/QCD Model with Matter: We study an improved AdS/QCD model at finite temperature and chemical\npotential. An Ansatz for the beta-function for the boundary theory allows for\nthe derivation of a charged dilatonic black hole in bulk. The solution is\nasymptotically RN-AdS in the UV and AdS2 * R3 in the IR. We discuss the\nthermodynamical aspects of the solution. The fermionic susceptibilities are\nshown to deviate from the free fermionic limits at asymptotic temperatures\ndespite the asymptotically free nature of the gauge coupling at the boundary.\nThe Polyakov line, the temporal and spatial string tensions dependence on both\ntemperature and chemical potential are also discussed.",
        "category": "hep"
    },
    {
        "text": "B decays into radially excited charmed mesons: It has been recently argued that some longstanding problems in semileptonic B\ndecays can be solved provided the branching ratio for the $B\\to\nD^{\\prime(\\ast)}$ semileptonic decays are large enough. We have studied these\ndecays in a constituent quark model which has been successful in describing\nsemileptonic and non-leptonic B decays into orbitally excited charmed mesons.\nOur results do not confirm the hypothesis of large branching ratios for the\n$B\\to D^{\\prime(\\ast)}$ semileptonic decays. In addition, we calculate the\nnon-leptonic $B\\to D'\\pi$ decays which can provide an independent test of the\nform factors involved in the $B\\to D^{\\prime(\\ast)}$ reactions.",
        "category": "hep"
    },
    {
        "text": "Massive IIA Supergravity as a Non-linear Realisation: A description of the bosonic sector of massive IIA supergravity as a\nnon-linear realisation is given. An essential feature of this construction is\nthat the momentum generators have non-trivial commutation relations with the\ngenerators associated with the gauge fields.",
        "category": "hep"
    },
    {
        "text": "Neutrino oscillations in de Sitter space-time: We try to understand flavor oscillations and to develop the formulae for\ndescribing neutrino oscillations in de Sitter space-time. First, the covariant\nDirac equation is investigated under the conformally flat coordinates of de\nSitter geometry. Then, we obtain the exact solutions of the Dirac equation and\nindicate the explicit form of the phase of wave function. Next, the concise\nformulae for calculating the neutrino oscillation probabilities in de Sitter\nspace-time are given. Finally, The difference between our formulae and the\nstandard result in Minkowski space-time is pointed out.",
        "category": "hep"
    },
    {
        "text": "SU(2) Gauge Theory in $2+1$ Dimensions on a Plaquette Chain Obeys the\n  Eigenstate Thermalization Hypothesis: We test the eigenstate thermalization hypothesis (ETH) for 2+1 dimensional\nSU(2) lattice gauge theory. By considering the theory on a chain of plaquettes\nand truncating basis states for link variables at $j=1/2$, we can map it onto a\nquantum spin chain with local interactions and numerically exactly diagonalize\nthe Hamiltonian for reasonably large lattice sizes. We find energy level\nrepulsion in momentum sectors with no remaining discrete symmetry. We study two\nlocal observables made up of Wilson loops and calculate their matrix elements\nin the energy eigenbasis, which are shown consistent with the ETH.",
        "category": "hep"
    },
    {
        "text": "Neutrino Large Mixing in Universal Yukawa Coupling Model with Small\n  Violation: We have analyzed the possibility that the universal Yukawa coupling\n(democratic mass matrix) with small violations of Dirac and Majorana neutrinos\ncan induce the large mixing of neutrinos through the seesaw mechanism. The\npossibility can be achieved by the condition that the violation parameters of\nMajorana neutrinos are sufficiently smaller than the violation parameters of\nDirac neutrinos. Allowed regions of the violation parameters producing the\nobserved neutrino mass hierarchy and large neutrino mixing are not so\nrestricted at present in contrast to the violation parameters for quark sector.",
        "category": "hep"
    },
    {
        "text": "Scalar mesons within a dynamical holographic QCD model: We show that the infrared dynamics of string modes dual to $q\\bar q$ states\nwithin a Dynamical AdS/QCD model of coupled dilaton-gravity background gives\nthe Reggelike spectrum of $f0's$ scalars and higher spin mesons consistent with\nexperimental data. The pion mass and its trajectory were also described with a\nscale deformation of the metric and a rescaled string mass. The available\nexperimental decay widths of the $S\\to PP$ decays provided a complementary\ncheck of the proposed classification scheme for$f_0(980)$, $f_0(1370)$,\n$f_0(1500)$ and $f_0(1710)$ as radial excitations of $f_0(600)$. For $f_0(980)$\nwe estimated a mixing angle of $\\pm 20^o$ with other structures.",
        "category": "hep"
    },
    {
        "text": "SU(N) Skyrmions from Instantons: Atiyah and Manton have outlined a scheme to obtain approximations to the\nSU(2) skyrmions from instantons in $\\R^4$. In this paper we apply this scheme\nto construct, in an explicit form, approximations to static spherically\nsymmetric SU(N) skyrmions with various baryon numbers. In particular we show\nhow to obtain the skyrmions from instantons using harmonic maps into complex\nprojective spaces.",
        "category": "hep"
    },
    {
        "text": "Cost-Effective Clustering: Small Beowulf clusters can effectively serve as personal or group\nsupercomputers. In such an environment, a cluster can be optimally designed for\na specific problem (or a small set of codes). We discuss how theoretical\nanalysis of the code and benchmarking on similar hardware lead to optimal\nsystems.",
        "category": "hep"
    },
    {
        "text": "Moduli-dependent Calabi-Yau and SU(3)-structure metrics from Machine\n  Learning: We use machine learning to approximate Calabi-Yau and SU(3)-structure\nmetrics, including for the first time complex structure moduli dependence. Our\nnew methods furthermore improve existing numerical approximations in terms of\naccuracy and speed. Knowing these metrics has numerous applications, ranging\nfrom computations of crucial aspects of the effective field theory of string\ncompactifications such as the canonical normalizations for Yukawa couplings,\nand the massive string spectrum which plays a crucial role in swampland\nconjectures, to mirror symmetry and the SYZ conjecture. In the case of SU(3)\nstructure, our machine learning approach allows us to engineer metrics with\ncertain torsion properties. Our methods are demonstrated for Calabi-Yau and\nSU(3)-structure manifolds based on a one-parameter family of quintic\nhypersurfaces in $\\mathbb{P}^4.$",
        "category": "hep"
    },
    {
        "text": "Braneworld Flux Inflation: We propose a geometrical model of brane inflation where inflation is driven\nby the flux generated by opposing brane charges and terminated by the collision\nof the branes, with charge annihilation. We assume the collision process is\ncompletely inelastic and the kinetic energy is transformed into the thermal\nenergy after collision. Thereafter the two branes coalesce together and behave\nas a single brane universe with zero effective cosmological constant. In the\nEinstein frame, the 4-dimensional effective theory changes abruptly at the\ncollision point. Therefore, our inflationary model is necessarily 5-dimensional\nin nature. As the collision process has no singularity in 5-dimensional\ngravity, we can follow the evolution of fluctuations during the whole history\nof the universe. It turns out that the radion field fluctuations have a steeply\ntilted, red spectrum, while the primordial gravitational waves have a flat\nspectrum. Instead, primordial density perturbations could be generated by a\ncurvaton mechanism.",
        "category": "hep"
    },
    {
        "text": "$CP$ violation for $B^+_{c}\\rightarrow D_{(s)}^+\u03c0^+\u03c0^-$ in\n  Perturbative QCD: In the perturbative QCD (PQCD) approach we study the direct $CP$ violation in\n$B^+_{c}\\rightarrow D_{(s)}^+\\rho^0(\\omega) \\rightarrow D_{(s)}^+\\pi^+\\pi^-$\nvia the $\\rho-\\omega$ mixing mechanism. We find that the $CP$ violation can be\nenhanced by $\\rho-\\omega$ mixing when the invariant masses of the $\\pi^+\\pi^-$\npairs are in the vicinity of the $\\omega$ resonance. For the decay process\n$B^+_{c}\\rightarrow D^+\\rho^0(\\omega) \\rightarrow D^+\\pi^+\\pi^-$, the maximum\n$CP$ violation can reach 7.5 {\\%}.",
        "category": "hep"
    },
    {
        "text": "Testing $Z$ boson rare decays $Z\\to H_1 \u03b3, A_1 \u03b3$ with\n  $(g-2)_\u03bc$, $\u03b4M_W$, and $BR(h_{\\rm SM}\\to Z\u03b3)$ in the NMSSM: We study the rare decay process of $Z$ boson into photon, accompanied by a\nCP-even or CP-odd scalar. We present the analytical delineation of the\nprocesses through the model-independent parametrizations of the new physics\ncouplings and, finally, consider the Next-to-Minimal Supersymmetric Standard\nModel to mark out the parameter space where the branching fraction can have the\nmaximum value. As a part of the necessary phenomenological and experimental\ncross-checks, we aim to fit the anomalous magnetic moment of the muon and $W$\nboson mass anomaly through the supersymmetric contributions. We also find that\nthe decays $Z\\to H_1 \\gamma, A_1 \\gamma$ can serve as an excellent\ncomplementary test to $BR(h_{\\rm SM}\\to Z\\gamma)$. In fact, to facilitate\nfuture searches, we unveil a few benchmark points that additionally satisfy the\ndeviation of $BR(h_{\\rm SM}\\to Z\\gamma)$ from the SM value based on the recent\nmeasurements of ATLAS and CMS. Future proposals such as ILC, CEPC, and FCC-ee\nare anticipated to operate for multiple years, focusing on center-of-mass\nenergy near the $Z$ pole. Consequently, these projects will be capable of\nconducting experiments at the Giga-$Z$ ($10^{9}$ of $Z$ bosons) and Tera-$Z$\n($10^{12}$ of $Z$ bosons) phases, which may probe the aforesaid rare decay\nprocesses, thus the model as well. These unconventional yet complementary\nsearches offer different routes to explore the supersymmetric models with\nextended Higgs sectors like NMSSM.",
        "category": "hep"
    },
    {
        "text": "Emergent Time and the M5-Brane: We consider the maximal super-Yang-Mills theory in 5 Euclidean dimensions\nwith SO(5) R-symmetry and 16 supersymmetries. We argue that the strong coupling\nlimit of this theory (with a possible UV completion) has an emergent time\ndimension and gives a description of the 5+1 dimensional Lorentz invariant\n(2,0) theory of the M5-brane, compactified on a timelike circle with radius\nR=g^2/4\\pi^2 . Our discussion involves issues of quantization of Euclidean\ntheories without time.",
        "category": "hep"
    },
    {
        "text": "Non-perturbative bottom PDF and its possible impact on new physics\n  searches: Heavy quark parton distribution functions (PDFs) play an important role in\nseveral Standard Model and New Physics processes. Most PDF analyses rely on the\nassumption that the charm and bottom PDFs are generated perturbatively by gluon\nsplitting and do not include any non-perturbative degrees of freedom. However,\na non-perturbative, intrinsic heavy quark PDFs have been predicted in the\nliterature. We demonstrate that to a very good approximation the\nscale-evolution of the intrinsic heavy quark content of the nucleon is governed\nby non-singlet evolution equations, and use this approximation to model the\nintrinsic bottom distribution and its impact on parton-parton luminosities at\nthe LHC.",
        "category": "hep"
    },
    {
        "text": "Generalized W-algebras and Integrable Hierarchies: We report on generalizations of the KdV-type integrable hierarchies of\nDrinfel'd and Sokolov. These hierarchies lead to the existence of new classical\n$W$-algebras, which arise as the second Hamiltonian structure of the\nhierarchies. In particular, we present a construction of the $W_n^{(l)}$\nalgebras.",
        "category": "hep"
    },
    {
        "text": "Effects of quark GPDs in meson electroproduction: We analyze light meson electroproduction in the intermediate energy range\nwhere the quark contributions are essential. Our calculations are carried out\non the basis of the handbag approach. We study cross sections and spin\nasymmetries for various vector and pseudoscalar mesons. Our results are in good\nagrement with COMPASS and HERMES experiments.",
        "category": "hep"
    },
    {
        "text": "Search for $C=+$ charmonium states in $e^+e^-\\to \u03b3+~X$ at\n  BEPCII/BESIII: We extend our original study in Ref. [1] on the production of $C=+$\ncharmonium states $X=\\eta_c(1S/2S)$ and $\\chi_{cJ}(1P/2P)$ in\n$e^+e^-\\to\\gamma~+~X$ at B factories to the BEPCII/BESIII energy region with\n$\\sqrt{s}=4.0\\mbox{-}5.0$ GeV. In the framework of nonrelativistic QCD\nfactorization, the cross sections are estimated to be as large as\n$0.1\\mbox{-}0.9$ pb. The results could be used to search for the missing $2P$\ncharmonium states or to estimate the continuum backgrounds in the resonance\nregion.",
        "category": "hep"
    },
    {
        "text": "QCD Isospin Breaking in Meson Masses, Decay Constants and Quark Mass\n  Ratios: The procedure to calculate masses and matrix-elements in the presence of\nmixing of the basis states is explained in detail. We then apply this procedure\nto the two-loop calculation in Chiral Perturbation Theory of pseudoscalar\nmasses and decay constants including quark mass isospin breaking. These results\nare used to update our analysis of $K_{\\ell4}$ done previously and obtain a\nvalue of $m_u/m_d$ in addition to values for the low-energy-constants $L_i^r$.",
        "category": "hep"
    },
    {
        "text": "Bosonization approach for \"atomic collapse\" in graphene: We study quantum electrodynamics with 2+1 dimensional massless Dirac fermion\naround a Coulomb impurity. Around a large charge with atomic number Z > 137,\nthe QED vacuum is expected to collapse due to the strong Coulombic force. While\nthe relativistic quantum mechanics fails to make reliable predictions for the\nfate of the vacuum, the heavy ion collision experiment also does not give clear\nunderstanding of this system. Recently, the \"atomic collapse\" resonances were\nobserved on graphene where an artificial nuclei can be made. In this paper, we\npresent our nonperturbative study of the vacuum structure of the quasiparticles\nin graphene with a charge impurity which contains multi-body effect using\nbosonization method.",
        "category": "hep"
    },
    {
        "text": "Spectral probes of the holographic Fermi groundstate: dialing between\n  the electron star and AdS Dirac hair: We argue that the electron star and the AdS Dirac hair solution are two\nlimits of the free charged Fermi gas in AdS. Spectral functions of holographic\nduals to probe fermions in the background of electron stars have a free\nparameter that quantifies the number of constituent fermions that make up the\ncharge and energy density characterizing the electron star solution. The strict\nelectron star limit takes this number to be infinite. The Dirac hair solution\nis the limit where this number is unity. This is evident in the behavior of the\ndistribution of holographically dual Fermi surfaces. As we decrease the number\nof constituents in a fixed electron star background the number of Fermi\nsurfaces also decreases. An improved holographic Fermi groundstate should be a\nconfiguration that shares the qualitative properties of both limits.",
        "category": "hep"
    },
    {
        "text": "Duality and Canonical Transformations: We present a brief review on the canonical transformation description of some\nduality symmetries in string and gauge theories. In particular, we consider\nabelian and non-abelian T-dualities in closed and open string theories as well\nas S-duality in abelian and non-abelian non-supersymmetric gauge theories.",
        "category": "hep"
    },
    {
        "text": "Center vortex model for the infrared sector of SU(3) Yang-Mills theory:\n  Topological susceptibility: The topological susceptibility of the SU(3) random vortex world-surface\nensemble, an effective model of infrared Yang-Mills dynamics, is investigated.\nThe model is implemented by composing vortex world-surfaces of elementary\nsquares on a hypercubic lattice, supplemented by an appropriate specification\nof vortex color structure on the world-surfaces. Topological charge is\ngenerated in this picture by writhe and self-intersection of the vortex\nworld-surfaces. Systematic uncertainties in the evaluation of the topological\ncharge, engendered by the hypercubic construction, are discussed. Results for\nthe topological susceptibility are reported as a function of temperature and\ncompared to corresponding measurements in SU(3) lattice Yang-Mills theory. In\nthe confined phase, the topological susceptibility of the random vortex\nworld-surface ensemble appears quantitatively consistent with Yang-Mills\ntheory. As the temperature is raised into the deconfined regime, the\ntopological susceptibility falls off rapidly, but significantly less so than in\nSU(3) lattice Yang-Mills theory. Possible causes of this deviation, ranging\nfrom artefacts of the hypercubic description to more physical sources, such as\nthe adopted vortex dynamics, are discussed.",
        "category": "hep"
    },
    {
        "text": "Search for Long-Lived Massive Charged Particles in 1.96 TeV $\\bar{p}p}$\n  Collisions: We performed a signature-based search for long-lived charged massive\nparticles (CHAMPs) produced in 1.0 $\\rm{fb}^{-1}$ of $\\bar{p}p$ collisions at\n$\\sqrt{s}=1.96$ TeV, collected with the CDF II detector using a high\ntransverse-momentum ($p_T$) muon trigger. The search used time-of-flight to\nisolate slowly moving, high-$p_T$ particles. One event passed our selection\ncuts with an expected background of $1.9 \\pm 0.2$ events. We set an upper bound\non the production cross section, and, interpreting this result within the\ncontext of a stable scalar top quark model, set a lower limit on the particle\nmass of 249 GeV/$c^2$ at 95% C.L.",
        "category": "hep"
    },
    {
        "text": "A New Scale-Dependent Cosmology with the Generalized Robertson--Walker\n  Metric and Einstein Equation: Based on the observed increase of $\\Omega _0$ as a function of cosmic scale,\nthe Robertson--Walker metric and the Einstein equation are generalized so that\n$ \\Omega_0$, $H_0$, and the age of the Universe, $t_0$, all become functions of\ncosmic scales at which we observe them. The calculated local (within our\ngalaxy) age of the Universe is about 18 Gyr, consistent with the ages of the\noldest stars and globular clusters in our galaxy, while the ages at distant\nscales are shorter than the local age, solving the age puzzle. It is also shown\nthat $H_0$ increases as scale increases, qualitatively consistent with the\nrecent observations.",
        "category": "hep"
    },
    {
        "text": "SU(4) Preonic Interpretation of the HERA Positron-Jet Events: We show that our recent SU(4) generalized ``rishon'' composite model for\nquarks and leptons, augmented either by the hypothesis of breaking of color\nSU(3) to ``glow'' SO(3), or by the hypothesis of incomplete color\nneutralization in very hard processes, leads to an interpretation of the HERA\npositron-jet events as the production by color gluon exchange, followed by the\ndecay by color gluon emission, of the positron member of a heavy family partner\nof the positron.",
        "category": "hep"
    },
    {
        "text": "Holographic Fermionic Fixed Points in d=3: We present a top-down string theory holographic model of strongly interacting\nrelativistic 2+1-dimensional fermions, paying careful attention to the discrete\nsymmetries of parity and time reversal invariance. Our construction is based on\nprobe $D7$-branes in $AdS_5 \\times S^5$, stabilized by internal fluxes. We find\nthree solutions, a parity and time reversal invariant conformal field theory\nwhich can be viewed as a particular deformation of Coulomb interacting\ngraphene, a parity and time reversal violating but gapless field theory and a\nsystem with a parity and time reversal violating charge gap. We show that the\nChern-Simons-like electric response function, which is generated perturbatively\nat one-loop order by parity violating fermions and which is protected by a\nno-renormalization theorem at orders beyond one loop, indeed appears with the\ncorrectly quantized coefficient in the charge gapped theory. In the gapless\nparity violating solution, the Chern-Simons response function obtains quantum\ncorrections which we compute in the holographic theory.",
        "category": "hep"
    },
    {
        "text": "Local charges in involution and hierarchies in integrable sigma-models: Integrable $\\sigma$-models, such as the principal chiral model,\n${\\mathbb{Z}}_T$-coset models for $T \\in {\\mathbb{Z}}_{\\geq 2}$ and their\nvarious integrable deformations, are examples of non-ultralocal integrable\nfield theories described by (cyclotomic) $r/s$-systems with twist function. In\nthis general setting, and when the Lie algebra ${\\mathfrak{g}}$ underlying the\n$r/s$-system is of classical type, we construct an infinite algebra of local\nconserved charges in involution, extending the approach of Evans, Hassan,\nMacKay and Mountain developed for the principal chiral model and symmetric\nspace $\\sigma$-model. In the present context, the local charges are attached to\ncertain `regular' zeros of the twist function and have increasing degrees\nrelated to the exponents of the untwisted affine Kac-Moody algebra\n$\\widehat{{\\mathfrak{g}}}$ associated with ${\\mathfrak{g}}$. The Hamiltonian\nflows of these charges are shown to generate an infinite hierarchy of\ncompatible integrable equations.",
        "category": "hep"
    },
    {
        "text": "Horava-Lifshitz gravity with detailed balance: Horava-Lifshitz gravity with \"detailed balance\" but without the\nprojectability assumption is discussed. It is shown that detailed balance is\nquite efficient in limiting the proliferation of couplings in Horava-Lifshitz\ngravity, and that its implementation without the projectability assumption\nleads to a theory with sensible dynamics. However, the (bare) cosmological\nconstant is restricted to be large and negative.",
        "category": "hep"
    },
    {
        "text": "Recurrence relations for toric N=1 superconformal blocks: General 1-point toric blocks in all sectors of N=1 superconformal field\ntheories are analyzed. The recurrence relations for blocks coefficients are\nderived by calculating their residues and large $\\Delta$ asymptotics.",
        "category": "hep"
    },
    {
        "text": "Determining Heavy Mass Parameters in Supersymmetric SO(10) Models: Extrapolations of soft scalar mass parameters in supersymmetric theories can\nbe used to explore elements of the physics scenario near the grand unification\nscale. We investigate the potential of this method in the lepton sector of\nSO(10) which incorporates right-handed neutrino superfields. The method is\nexemplified in two models by exploring limits on the precision that can be\nexpected from coherent LHC and e+e- collider analyses in the reconstruction of\nthe fundamental scalar mass parameters at the unification scale and of the\nD-terms related to the breaking of grand unification symmetries. In addition,\nthe mass of the third-generation right-handed neutrino can be estimated in\nseesaw scenarios. Even though the models are simplified and not intended to\naccount for all aspects of a final comprehensive SO(10) theory, they provide\nnevertheless a valid base for identifying essential elements that can be\ninferred on the fundamental high-scale theory from high-energy experiments.",
        "category": "hep"
    },
    {
        "text": "A Phenomenological Approach to Multi-Higgs Production at High Energy: We tackle the issue of the factorial growth in the amplitudes of multi-Higgs\nproduction at high energy by developing a phenomenological approach based on\nthe Higgs splitting functions and Sudakov factors. We utilize the method of\ngenerating functionals to define several jet observables for the Higgs sector.\nOur results suggest that pure Higgs splittings should retain a good UV behavior\nin contrast to the common picture represented by the breakdown of perturbation\ntheory and violation of unitarity due to the high multiplicity of particles\nproduced at or near threshold, which is found in scalar theories. We thus argue\nthat the issue of the factorial growth in the amplitude of multi-Higgs\nproduction is probably associated with applying perturbation theory in a regime\nwhere it is no longer valid, as opposed to being a sign of new physics.",
        "category": "hep"
    },
    {
        "text": "Omega-deformed SYM on a Gibbons-Hawking Space: We study an $\\mathcal{N}=2$, pure $U(1)$ SYM theory on a Gibbons-Hawking\nspace $\\Omega$-deformed using the $U(1)$ isometry. The resultant 3D theory,\nafter an appropriate \"Nekrasov-Witten\" change of variables, is asymptotically\nequivalent to the undeformed theory at spatial infinity but differs from it as\none approaches the NUT centers which are fixed points under the $U(1)$ action.\nThe 3D theory may be recast in the form of a generalized hyperk\\\"ahler sigma\nmodel introduced in \\cite{Dey:2014lja} where the target space is a\none-parameter family of hyperk\\\"ahler spaces. The hyperk\\\"ahler fibers have a\npreferred complex structure which for the deformed theory depends on the\nparameter of $\\Omega$-deformation. The metric on the hyperk\\\"ahler fiber can be\nreduced to a standard metric on $\\mathbb{C} \\times T^2$ with the modular\nparameter of the torus depending explicitly on the $\\Omega$-deformation\nparameter. The contribution of the NUT center to the sigma model path integral,\nexpected to be a holomorphic section of a holomorphic line bundle over the\ntarget space on grounds of supersymmetry, turns out to be a Jacobi theta\nfunction in terms of certain \"deformed\" variables.",
        "category": "hep"
    },
    {
        "text": "On Infrared Universality in Massive Theories. Another Example: The infrared behaviour of the ${\\phi}^3$-theory is discussed stressing\nanalogies with the Witten-Seiberg story about $N=2$ $QCD$. Though the\nmicroscopic theory is apparently not integrable, the effective theory is shown\nto be integrable at classical level, and a general solution of it in terms of\nhypergeometric functions is obtained. An effective theory for the multiparticle\nsoft scattering is sketched.",
        "category": "hep"
    },
    {
        "text": "Neutrinos at high energy accelerators: PREAMBLE, BRIEF HISTORY AND PRELIMINARIES, QUICK REVIEW OF BASIC NEUTRINO\nPROPERTIES, CHARGED CURRENT NEUTRINO PROCESSES, NEUTRAL CURRENT NEUTRINO\nPROCESSES, VERY HEAVY NEUTRINOS, CONCLUDING SUMMARY",
        "category": "hep"
    },
    {
        "text": "Exact potential and scattering amplitudes from the tachyon non-linear\n  $\u03b2$-function: We compute, on the disk, the non-linear tachyon $\\beta$-function, $\\beta^T$,\nof the open bosonic string theory. $\\beta^T$ is determined both in an expansion\nto the third power of the field and to all orders in derivatives and in an\nexpansion to any power of the tachyon field in the leading order in\nderivatives. We construct the Witten-Shatashvili (WS) space-time effective\naction $S$ and prove that it has a very simple universal form in terms of the\nrenormalized tachyon field and $\\beta^T$. The expression for $S$ is well suited\nto studying both processes that are far off-shell, such as tachyon\ncondensation, and close to the mass-shell, such as perturbative on-shell\namplitudes. We evaluate $S$ in a small derivative expansion, providing the\nexact tachyon potential. The normalization of $S$ is fixed by requiring that\nthe field redefinition that maps $S$ into the tachyon effective action derived\nfrom the cubic string field theory is regular on-shell. The normalization\nfactor is in precise agreement with the one required for verifying all the\nconjectures on tachyon condensation. The coordinates in the space of couplings\nin which the tachyon $\\beta$-function is non linear are the most appropriate to\nstudy RG fixed points that can be interpreted as solitons of $S$, $i.e.$\nD-branes.",
        "category": "hep"
    },
    {
        "text": "The Toric SO(10) F-Theory Landscape: Supergravity theories in more than four dimensions with grand unified gauge\nsymmetries are an important intermediate step towards the ultraviolet\ncompletion of the Standard Model in string theory. Using toric geometry, we\nclassify and analyze six-dimensional F-theory vacua with gauge group SO(10)\ntaking into account Mordell-Weil U(1) and discrete gauge factors. We determine\nthe full matter spectrum of these models, including charged and neutral SO(10)\nsinglets. Based solely on the geometry, we compute all matter multiplicities\nand confirm the cancellation of gauge and gravitational anomalies independent\nof the base space. Particular emphasis is put on symmetry enhancements at the\nloci of matter fields and to the frequent appearance of superconformal points.\nThey are linked to non-toric K\\\"ahler deformations which contribute to the\ncounting of degrees of freedom. We compute the anomaly coefficients for these\ntheories as well by using a base-independent blow-up procedure and\nsuperconformal matter transitions. Finally, we identify six-dimensional\nsupergravity models which can yield the Standard Model with high-scale\nsupersymmetry by further compactification to four dimensions in an Abelian flux\nbackground.",
        "category": "hep"
    },
    {
        "text": "Gauge Invariances and Phases of Massive Higher Spins in (A)dS: The (m^2,\\Lambda) plane of spin s>1 massive fields in (A)dS backgrounds is\nshown to consist of separate phases, divided by lines of novel ``partially\nmassless'' gauge theories that successively remove helicities, starting from\nthe lowest, 0 or +/-(1/2). The norms of the excluded states flip as the gauge\nlines are crossed and only the region containing the massive Minkowski theory\nis unitary. The partially massless gauge theories are unitary or not, depending\non the ordering of the gauge lines. This ``level splitting'' of massless\nMinkowski gauge theories is specific to non-zero \\Lambda.",
        "category": "hep"
    },
    {
        "text": "Geometry of WZW Orientifolds: We analyze unoriented Wess-Zumino-Witten models from a geometrical point of\nview. We show that the geometric interpretation of simple current crosscap\nstates is as centre orientifold planes localized on conjugacy classes of the\ngroup manifold. We determine the locations and dimensions of these planes for\narbitrary simply-connected groups and orbifolds thereof. The dimensions of the\nO-planes turn out to be given by the dimensions of symmetric coset manifolds\nbased on regular embeddings. Furthermore, we give a geometrical interpretation\nof boundary conjugation in open unoriented WZW models; it yields D-branes\ntogether with their images under the orientifold projection. To find the\nagreement between O-planes and crosscap states, we find explicit answers for\nlattice extensions of Gaussian sums. These results allow us to express the\nmodular P-matrix, which is directly related to the crosscap coefficient, in\nterms of characters of the horizontal subgroup of the affine Lie algebra. A\ncorollary of this relation is that there exists a formal linear relation\nbetween the modular P- and the modular S-matrix.",
        "category": "hep"
    },
    {
        "text": "The chiral limit of non-compact QED(3): Non-compact QED(3) with four-component fermion flavor content larger than or\nequal to two is studied numerically near the chiral limit to understand its\nchiral symmetry breaking features. We monitor discretization and finite size\neffects on the chiral condensate by simulating the model at different values of\nthe gauge coupling on lattices ranging in size from 10^3 to 50^3. Our upper\nbound for the dimensionless condensate beta^2<psibarpsi> in the N_f=2 case is\n5x10^{-5}.",
        "category": "hep"
    },
    {
        "text": "Precise Branching Ratio Measurements of the Decays D0-->pi- pi+ pi0 and\n  D0-->K- K+ pi0: Using 232 fb-1 of e+e- collision data recorded by the BaBar experiment, we\nmeasure the ratios of three-body Cabibbo-suppressed decay rates of the D^0\nmeson relative to that of the Cabibbo-favored decay:\n  B(D0 --> pi- pi+ pi0)/ B(D0 --> K- pi+ pi0) = (10.59 +/- 0.06 +/-\n0.13).10^{-2} and B(D0 --> K- K+ pi0)/ B(D0 --> K- pi+ pi0) = (2.37 +/- 0.03\n+/- 0.04). 10^{-2}, where the errors are statistical and systematic\nrespectively. The precisions of these measurements are significantly better\nthan those of the current world average values.We note that the second result\ndiffers significantly from the current world average value. Using the PDG-2006\nvalue for D0 --> K- pi+ pi0 branching fraction, we obtain, B(D0 --> pi- pi+\npi0) = (1.493 +/- 0.008 +/- 0.018 +/- 0.053). 10^{-2}, B(D0 --> K- K+ pi0) =\n(0.334 +/- 0.004 +/- 0.006 +/- 0.012). 10^{-2}, where the errors are\nstatistical, systematic, and due to the uncertainty of B(D0 --> K- pi+ pi0).\nThe average squared matrix elements for both of the singly Cabibbo-suppressed\ndecays are roughly a factor of sin^2 \\theta_C smaller than that for the\nCabibbo-favored decay and are therefore, in contrast to the corresponding\ntwo-body modes, consistent with the naive expectations.",
        "category": "hep"
    },
    {
        "text": "Black Holes and Rings of minimal 5-dim. Supergravity: In this talk, I will summarize recent developments in 5-dimensional\nsupergravity. Apart from black ring solutions, we will discuss the way of\nobtaining regular (bubbling) solutions with the same charges as black holes. We\noutline the procedure for the solution in five and four dimensions. Finally we\nexplore the close relationship between 4- and 5-dimensional supersymmetric\nstationary solutions.",
        "category": "hep"
    },
    {
        "text": "Can we discover lepton number violation with LHC far detectors?: Two classes of far detectors have been proposed or are under operation at the\nLHC. The first class is a series of neutrino detectors that are sensitive to\nlight active neutrinos via either charged-current or neutral-current\ninteractions; exemplary ideas are FASER$\\nu$, SND@LHC, and FLArE. Another type\naims primarily at looking for displaced decays of long-lived particles (LLPs)\ninto charged final-state particles, including ANUBIS and FASER. In this work,\nwe propose searches for probing lepton number violation associated with a\nMajorana active/sterile neutrino, for the first time with these experiments,\nwhich, if discovered, would be a clear signature of new physics beyond the\nStandard Model. With Monte-Carlo simulation, we find that while the neutrino\ndetectors, unfortunately, are estimated to have signal-event rates orders of\nmagnitude below $\\mathcal{O}(1)$, some LLP far detectors such as ANUBIS, if\nupgraded, would be most promising for discovering a Majorana sterile neutrino\nof mass $\\mathcal{O}(\\text{1})$ GeV in certain so-far unexcluded parameter\nspace. In this exploratory work, we emphasize on the importance of leveraging\nthe LHC far detectors for purposes beyond the planned ones, such as searching\nfor lepton number violation.",
        "category": "hep"
    },
    {
        "text": "Non-perturbative determination of anisotropy coefficients and pressure\n  gap at the deconfining transition of QCD: We propose a new non-perturbative method to compute derivatives of gauge\ncoupling constants with respect to anisotropic lattice spacings (anisotropy\ncoefficients). Our method is based on a precise measurement of the finite\ntemperature deconfining transition curve in the lattice coupling parameter\nspace extended to anisotropic lattices by applying the spectral density method.\nWe determine the anisotropy coefficients for the cases of SU(2) and SU(3) gauge\ntheories. A longstanding problem, when one uses the perturbative anisotropy\ncoefficients, is a non-vanishing pressure gap at the deconfining transition\npoint in the SU(3) gauge theory. Using our non-perturbative anisotropy\ncoefficients, we find that this problem is completely resolved.",
        "category": "hep"
    },
    {
        "text": "BFKL predictions for inclusive three jet production at the LHC: We define new observables sensitive to BFKL dynamics in the context of\nmultijet production at the large hadron collider (LHC). We propose the study of\nthe inclusive production of three jets well separated in rapidity from each\nother, with two of them being very forward. We show that the tagging of a third\njet in the central region of rapidity allows for a very strong test of the BFKL\nformalism. In particular, we have studied two projections on azimuthal angles\nfor the differential cross section which allow for the definition of many\ndifferent observables whose behavior when varying the $p_t$ and rapidity of the\ncentral jet is a distinct signal of BFKL dynamics. In order to reduce the\ntheoretical uncertainties and influence of higher order corrections, we propose\nthe study of ratios of correlation functions of products of cosines of\nazimuthal angle differences among the tagged jets.",
        "category": "hep"
    },
    {
        "text": "KdV Charges and the Generalized Torus Partition Sum in $T{\\bar T}$\n  deformation: We consider KdV currents in a quantum field theory obtained by deforming a\ntwo dimensional conformal field theory on a cylinder via the irrelevant\noperator $T{\\bar T}$. In this paper we determine their one-point functions\nmodular properties. We find that the one-point functions factorize into two\ncomponents each with a definite modular weight. We also obtain a general\ndifferential equation that the generalized torus partition sum satisfies.",
        "category": "hep"
    },
    {
        "text": "Proof of vanishing cohomology at the tachyon vacuum: We prove Sen's third conjecture that there are no on-shell perturbative\nexcitations of the tachyon vacuum in open bosonic string field theory. The\nproof relies on the existence of a special state A, which, when acted on by the\nBRST operator at the tachyon vacuum, gives the identity. While this state was\nfound numerically in Feynman-Siegel gauge, here we give a simple analytic\nexpression.",
        "category": "hep"
    },
    {
        "text": "Properties of infinite product amplitudes: Veneziano, Virasoro, and Coon: We detail the properties of the Veneziano, Virasoro, and Coon amplitudes.\nThese tree-level four-point scattering amplitudes may be written as infinite\nproducts with an infinite sequence of simple poles. Our approach for the Coon\namplitude uses the mathematical theory of $q$-analysis. We interpret the Coon\namplitude as a $q$-deformation of the Veneziano amplitude for all $q \\geq 0$\nand discover a new transcendental structure in its low-energy expansion. We\nshow that there is no analogous $q$-deformation of the Virasoro amplitude.",
        "category": "hep"
    },
    {
        "text": "Explicit Chiral Symmetry Breaking as a Premise of the Cross-Sections'\n  Rise: We argue that if QCD yields a theory of interacting hadrons then explicit\nchiral symmetry breaking is a necessary condition for infinitely rising\ncross-sections. Otherwise cross-sections go to zero at high energies.",
        "category": "hep"
    },
    {
        "text": "Cosmic String Production Towards the End of Brane Inflation: Towards the end of the brane inflationary epoch in the brane world, cosmic\nstrings (but not texture, domain walls or monopoles) are copiously produced\nduring brane collision. These cosmic strings are D$p$-branes with $(p-1)$\ndimensions compactified. We elaborate on this prediction of the superstring\ntheory description of the brane world. Using the data on the temperature\nanisotropy in the cosmic microwave background, we estimate the cosmic string\ntension $\\mu$ to be around $G \\mu \\simeq 10^{-7}$. This in turn implies that\nthe anisotropy in the cosmic microwave background comes mostly from inflation,\nbut with a component (of order 10%) from cosmic strings. This cosmic string\neffect should also be observable in gravitational wave detectors and maybe even\npulsar timing measurements.\n  Keywords : Inflation, Brane World, Superstring Theory, Cosmic String,\nCosmology",
        "category": "hep"
    },
    {
        "text": "Magnetic Quivers, Higgs Branches, and 6d N=(1,0) Theories: The physics of M5 branes placed near an M9 plane on an A-type ALE singularity\nexhibits a variety of phenomena that introduce additional massless degrees of\nfreedom. There are tensionless strings whenever two M5 branes coincide or\nwhenever an M5 brane approaches the M9 plane. These systems do not admit a\nlow-energy Lagrangian description so new techniques are desirable to shed light\non the physics of these phenomena. The 6-dimensional N=(1,0) world-volume\ntheory on the M5 branes is composed of massless vector, tensor, and hyper\nmultiplets, and has two branches of the vacuum moduli space where either the\nscalar fields in the tensor or hyper multiplets receive vacuum expectation\nvalues. Focusing on the Higgs branch of the low-energy theory, previous works\nsuggest the conjecture that a new Higgs branch arises whenever a BPS-string\nbecomes tensionless. Consequently, a single theory admits a multitude of Higgs\nbranches depending on the types of tensionless strings in the spectrum. The two\nmain phenomena discrete gauging and small E8 instanton transition can be\ntreated in a concise and effective manner by means of Coulomb branches of\n3-dimensional N=4 gauge theories. In this paper, a formalism is introduced that\nallows to derive a novel object from a brane configuration, called the magnetic\nquiver. The main features are as follows: (i) the 3d Coulomb branch of the\nmagnetic quiver yields the Higgs branch of the 6d system, (ii) all discrete\ngauging and E8 instanton transitions have an explicit brane realisation, and\n(iii) exceptional symmetries arise directly from brane configurations. The\nformalism facilitates the description of Higgs branches at finite and infinite\ngauge coupling as spaces of dressed monopole operators.",
        "category": "hep"
    },
    {
        "text": "A boundary matrix for AdS/CFT SU(1|1) spin chain: By solving the right reflection equation proposed in reference[16] to\ndescribe the Z=0 giant graviton branes, we obtain a boundary matrix with two\nfree parameters for the AdS/CFT SU(1|1) spin chain.",
        "category": "hep"
    },
    {
        "text": "Dynamical Generation of a Repulsive Vector Contribution to the Quark\n  Pressure: Lattice QCD results for the coefficient $c_2$ appearing in the Taylor\nexpansion of the pressure show that this quantity raises with the temperature\ntowards the Stefan-Boltzmann limit. On the other hand, model approximations\npredict that when a vector repulsion, parametrized by $G_V$, is present this\ncoefficient reaches a maximum just after $T_c$ and then deviates from the\nlattice predictions. Recently, this discrepancy has been used as a guide to\nconstrain the (presently unknown) value of $G_V$ within the framework of\neffective models at large-$N_c$ (LN). In the present investigation we show\nthat, due to finite $N_c$ effects, $c_2$ may also develop a maximum even when\n$G_V=0$ since a vector repulsive term can be dynamically generated by exchange\ntype of radiative corrections. Here we apply the the Optimized Perturbation\nTheory (OPT) method to the two flavor Polyakov--Nambu--Jona-Lasinio model (at\n$G_V=0$) and compare the results with those furnished by lattice simulations an\nby the LN approximation at $G_V=0$ and also at $G_V \\ne 0$. The OPT numerical\nresults for $c_2$ are impressively accurate for $T \\lesssim 1.2\\, T_c$ but, as\nexpected, predict that this quantity develops a maximum at high-$T$. After\nidentifying the mathematical origin of this extremum we argue that such a\ndiscrepant behavior may naturally arise within these effective quark models (at\n$G_V=0$) whenever the first $1/N_c$ corrections are taken into account. We then\ninterpret this hypothesis as an indication that beyond the large-$N_c$ limit\nthe correct high temperature (perturbative) behavior of $c_2$ will be\nfaithfully described by effective models only if they also mimic the asymptotic\nfreedom phenomenon.",
        "category": "hep"
    },
    {
        "text": "The Effect of Quark Sector Minimal Flavor Violation on Neutrinoless\n  Double Beta Decay: The question of whether neutrino masses are Dirac or Majorana is one of the\nmost important, and most difficult, questions remaining in the neutrino sector.\nSearches for neutrinoless double beta-decay may help to resolve this question,\nbut are also sensitive to new, higher dimension Delta L=2 operators. In this\npaper we place two phenomenological constraints on these operators at dimension\nd<=11. First, we require that the operators obey the quark flavor symmetries of\nthe Standard Model, with any violation of the symmetries being due to Yukawa\ninteractions, a scheme known as Minimal Flavor Violation (MFV). Second, we\nrequire that the operators which generate neutrinoless double beta-decay, and\nany operators related by the flavor symmetries, do not induce neutrino masses\nabove 0.05 eV, the limit implied by the atmospheric neutrino data. We find that\nthese requirements severely constrain the operators which can violate lepton\nnumber, such that most can no longer contribute to neutrinoless double\nbeta-decay at observable rates. It is noteworthy that quark flavor symmetries\ncan play such a strong role in constraining new leptonic physics, even when\nthat physics is not quark flavor changing. Those few operators that can mimic a\nMajorana neutrino mass then appear with cutoffs below a TeV, and represent new\nphysics which could be directly probed at the LHC or a future linear collider.",
        "category": "hep"
    },
    {
        "text": "New Physics Contributions to the Muon Anomalous Magnetic Moment: A\n  Numerical Code: We consider the contributions of individual new particles to the anomalous\nmagnetic moment of the muon, utilizing the generic framework of simplified\nmodels. We also present analytic results for all possible one-loop\ncontributions, allowing easy application of these results for more complete\nmodels which predict more than one particle capable of correcting the muon\nmagnetic moment. Additionally, we provide a Mathematica code to allow the\nreader straightforwardly compute any 1-loop contribution. Furthermore, we\nderive bounds on each new particle considered, assuming either the absence of\nother significant contributions to $a_\\mu$ or that the anomaly has been\nresolved by some other mechanism. The simplified models we consider are\nconstructed without the requirement of $SU(2)_L$ invariance, but appropriate\nchiral coupling choices are also considered. In summary, we found the following\nparticles capable of explaining the current discrepancy, assuming unit\ncouplings: $2$~TeV ($0.3$~TeV) neutral scalar with pure scalar (chiral)\ncouplings, $4$~TeV doubly charged scalar with pure pseudoscalar coupling,\n$0.3-1$~TeV neutral vector boson depending on what couplings are used (vector,\naxial, or mixed), $0.5-1$~TeV singly-charged vector boson depending on which\ncouplings are chosen, and $3$~TeV doubly-charged vector-coupled bosons. We also\nderive the following $1\\sigma$ lower bounds on new particle masses assuming\nunit couplings and that the experimental anomaly has been otherwise resolved: a\ndoubly charged pseudo-scalar must be heavier than $7$~TeV, a neutral scalar\nthan $3$~TeV, a vector-coupled new neutral boson $600$~GeV, an axial-coupled\nneutral boson $1.5$~TeV, a singly-charged vector-coupled $W^\\prime$ $1$~TeV, a\ndoubly-charged vector-coupled boson $5$~TeV, scalar leptoquarks $10$~TeV, and\nvector leptoquarks $10$~TeV.",
        "category": "hep"
    },
    {
        "text": "Magnetic Color Flavor Locking Phase in High Density QCD: We investigate the effects of an external magnetic field in the gap structure\nof a color superconductor with three massless quark flavors. Using an effective\ntheory with four-fermion interactions, inspired by one-gluon exchange, we show\nthat the long-range component $\\widetilde{B}$ of the external magnetic field\nthat penetrates the color-flavor locked (CFL) phase modifies its gap structure,\nproducing a new phase of lower symmetry. A main outcome of our study is that\nthe $\\widetilde{B}$ field tends to strengthen the gaps formed by\n$\\widetilde{Q}$-charged and $\\widetilde{Q}$-neutral quarks that coupled among\nthemselves through tree-level vertices. These gaps are enhanced by the\nfield-dependent density of states of the $\\widetilde{Q}$-charged quarks on the\nFermi surface. Our considerations are relevant for the study of highly\nmagnetized compact stars.",
        "category": "hep"
    },
    {
        "text": "N=2 supersymmetry in the twistor description of higher-spin holography: We study the holographic duality between higher-spin (HS) gravity in 4d and\nfree vector models in 3d, with special attention to the role of N=2\nsupersymmetry (SUSY). For the type-A bosonic bulk theory, dual to spin-0 fields\non the boundary, there exists a twistor-space description; this maps both\nsingle-trace boundary operators and linearized bulk fields to\nspacetime-independent twistor functions, whose HS-algebra products compute all\nboundary correlators. Here, we extend this description to the type-B bosonic\ntheory (dual to spin-1/2 fields on the boundary), and to the supersymmetric\ntheory containing both. A key role is played by boundary bilocals, which in\ntype-A are dual to the Didenko-Vasiliev 1/2-BPS \"black hole\". We extend this to\nan infinite family of linearized 1/2-BPS \"black hole\" solutions. Remarkably,\nthe full supersymmetric theory (along with the SUSY generators) fits in the\nsame space of twistor functions as the type-A theory. Instead of two sets of\nbosonic bulk fields, the formalism sees one set of linearized fields, but with\nboth types of boundary data allowed.",
        "category": "hep"
    },
    {
        "text": "Electron-interacting dark matter: Implications from DAMA/LIBRA-phase2\n  and prospects for liquid xenon detectors and NaI detectors: We investigate the possibility for the direct detection of low mass (GeV\nscale) WIMP dark matter in scintillation experiments. Such WIMPs are typically\ntoo light to leave appreciable nuclear recoils, but may be detected via their\nscattering off atomic electrons. In particular, the DAMA Collaboration [R.\nBernabei et al., Nucl. Phys. At. Energy 19, 307 (2018)] has recently presented\nstrong evidence of an annual modulation in the scintillation rate observed at\nenergies as low as 1 keV. Despite a strong enhancement in the calculated event\nrate at low energies, we find that an interpretation in terms of\nelectron-interacting WIMPs cannot be consistent with existing constraints. We\nalso demonstrate the importance of correct treatment of the atomic\nwavefunctions, and show the resulting event rate is very sensitive to the\nlow-energy performance of the detectors, meaning it is crucial that the\ndetector uncertainties be taken into account. Finally, we demonstrate that the\npotential scintillation event rate can be much larger than may otherwise be\nexpected, meaning that competitive searches can be performed for GeV scale\nWIMPs using the conventional prompt S1 scintillation signals. This is important\ngiven the recent and upcoming very large liquid xenon detectors.",
        "category": "hep"
    },
    {
        "text": "On the Poincare polynomials for Landau-Ginzburg Orbifolds: We construct the Poincare polynomials for Landau-Ginzburg orbifolds with\nprojection operators.Using them we show that special types of dualities\nincluding Poincare duality are realized under certain conditions. When\nCalabi-Yau interpretation exists, two simple formulae for Hodge numbers\n$h^{2,1}$ and $h^{1,1}$ are obtained.",
        "category": "hep"
    },
    {
        "text": "Non-Commutative Geometry & Physics: This talk is an introduction to ideas of non-commutative geometry and star\nproducts. We will discuss consequences for physics in two different settings:\nquantum field theories and astrophysics. In case of quantum field theory, we\nwill discuss two recently introduced models in some detail. Astrophysical\naspects will be discussed considering modified dispersion relations.",
        "category": "hep"
    },
    {
        "text": "Measurement of the t t-bar production cross section in the dilepton\n  channel in pp collisions at sqrt(s) = 8 TeV: The top-antitop quark (t t-bar) production cross section is measured in\nproton-proton collisions at sqrt(s) = 8 TeV with the CMS experiment at the LHC,\nusing a data sample corresponding to an integrated luminosity of 5.3 inverse\nfemtobarns. The measurement is performed by analysing events with a pair of\nelectrons or muons, or one electron and one muon, and at least two jets, one of\nwhich is identified as originating from hadronisation of a bottom quark. The\nmeasured cross section is 239 +/- 2 (stat.) +/- 11 (syst.) +/- 6 (lum.) pb, for\nan assumed top-quark mass of 172.5 GeV, in agreement with the prediction of the\nstandard model.",
        "category": "hep"
    },
    {
        "text": "Coloured Scalars Mediated Rare Charm Meson Decays to Invisible Fermions: We consider effects of coloured scalar mediators in decays $c\\to u \\, {\\it\ninvisibles}$. In particular, in these processes, as invisibles, we consider\nmassive right-handed fermions. The coloured scalar $\\bar S_1\\equiv (\\bar 3, 1,\n-2/3)$, due to its coupling to weak singlets up-quarks and invisible\nright-handed fermions ($\\chi$), is particularly interesting. Then, we consider\n$\\tilde R_2 \\equiv (\\bar 3, 2, 1/6)$, which as a weak doublet is a subject of\nsevere low-energy constraints. The $\\chi$ mass is considered in the range $(m_K\n- m_\\pi)/2\\leq m_\\chi \\leq (m_D - m_\\pi)/2$. We determine branching ratios for\n$D\\to \\chi \\bar \\chi$, $D\\to \\chi \\bar \\chi \\gamma$ and $D\\to \\pi \\chi \\chi$\nfor several $\\chi$ masses, using most constraining bounds. For $\\bar S_1$, the\nmost constraining is $D^0 -\\bar D^0$ mixing, while in the case of $\\tilde R_2$\nthe strongest constraint comes from $B\\to K {\\it missing\\, energy}$ . We find\nin decays mediated by $\\bar S_1$ that branching ratios can be $\\mathcal B(D\\to\n\\chi \\bar \\chi)< 10^{-8}$ for $m_\\chi=0.8$ GeV, $\\mathcal B(D\\to \\chi \\bar \\chi\n\\gamma) \\sim 10^{-8}$ for $m_\\chi=0.18$ GeV, while $\\mathcal B(D^+ \\to \\pi^+\n\\chi \\bar \\chi )$ can reach $ \\sim 10^{-8}$ for $m_\\chi=0.18$ GeV. In the case\nof $\\tilde R_2$ these decay rates are very suppressed. We find that future\ntau-charm factories and Belle II experiments offer good opportunities to search\nfor such processes. Both $\\bar S_1$ and $\\tilde R_2$ might have masses within\nLHC reach.",
        "category": "hep"
    },
    {
        "text": "$R_b$-$R_c$ Crisis and the Higgs Boson Mass from LEP Precision Data: We study the effects on the Higgs boson mass from LEP precision data of the\nnew physics explaining $R_b$-$R_c$ crisis. We implement a fit to LEP\nobservables with the new physics. We obtain $M_H^{\\rm New Physics} = 85 ^{+\n467}_{-56} ~~{\\rm GeV}$. Comparing with the value of the SM fit, $M_H^{\\rm SM}\n= 38^{+ 96}_{-21} ~~{\\rm GeV}$, the errors are larger and the central value is\nhigher. The new physics may allow $M_H$ to have a value out of the range of\n${\\cal O}(M_Z)$.",
        "category": "hep"
    },
    {
        "text": "Taub-NUT Black Holes in Third order Lovelock Gravity: We consider the existence of Taub-NUT solutions in third order Lovelock\ngravity with cosmological constant, and obtain the general form of these\nsolutions in eight dimensions. We find that, as in the case of Gauss-Bonnet\ngravity and in contrast with the Taub-NUT solutions of Einstein gravity, the\nmetric function depends on the specific form of the base factors on which one\nconstructs the circle fibration. Thus, one may say that the independence of the\nNUT solutions on the geometry of the base space is not a robust feature of all\ngenerally covariant theories of gravity and is peculiar to Einstein gravity. We\nfind that when Einstein gravity admits non-extremal NUT solutions with no\ncurvature singularity at $r=N$, then there exists a non-extremal NUT solution\nin third order Lovelock gravity. In 8-dimensional spacetime, this happens when\nthe metric of the base space is chosen to be $\\Bbb{CP}^{3}$. Indeed, third\norder Lovelock gravity does not admit non-extreme NUT solutions with any other\nbase space. This is another property which is peculiar to Einstein gravity. We\nalso find that the third order Lovelock gravity admits extremal NUT solution\nwhen the base space is $T^{2}\\times T^{2}\\times T^{2}$ or $S^{2}\\times\nT^{2}\\times T^{2}$. We have extended these observations to two conjectures\nabout the existence of NUT solutions in Lovelock gravity in any\neven-dimensional spacetime.",
        "category": "hep"
    },
    {
        "text": "On the Renormalization of Entanglement Entropy: The renormalization of entanglement entropy of quantum field theories is\ninvestigated in the simplest setting with a $\\lambda \\phi^4$ scalar field\ntheory. The 3+1 dimensional spacetime is separated into two regions by an\ninfinitely flat 2-dimensional interface. The entanglement entropy of the system\nacross the interface has an elegant geometrical interpretation using the\nreplica trick, which requires putting the field theory on a curved spacetime\nbackground. We demonstrate that the theory, and hence the entanglement entropy,\nis renormalizable at order $\\lambda$ once all the relevant operators up to\ndimension-4 are included in the action. This exercise has a one-to-one\ncorrespondence to entanglement entropy interpretation of the black hole entropy\nwhich suggests that our treatment is sensible. Our study suggests that\nentanglement entropy is renormalizable and is a physical quantity.",
        "category": "hep"
    },
    {
        "text": "QCD Reference Frames and False Jet Individualism: In collider physics, the properties of hadronic jets are often measured as a\nfunction of their lab-frame momenta. However, jet fragmentation must occur in\nthe particular rest frame of all color-connected particles. Since this frame\nneed not be the lab frame, the fragmentation of a jet depends on the properties\nof its sibling objects. This non-factorizability of jets has consequences for\njet techniques such as jet tagging, boosted boson measurements, and searches\nfor physics Beyond the Standard Model. In this paper, we will describe the\neffect and show its impact as predicted by simulation.",
        "category": "hep"
    },
    {
        "text": "Structure Functions at Very High Q^2 From HERA: Measurements of Deep-Inelastic Neutral and Charged current interactions are\npresented in lepton proton scattering at HERA. The measurements are obtained\nfrom taken during 1996 to 1999 and consists of $30 \\rm{pb^{-1}}$ of $e^+p$ and\n$16 \\rm{pb^{-1}}$ of $e^-p$ data. The addition of the new high statistics\nelectron data with the positron data allows the first extraction of the parity\nviolating structure function $xF_3$ and tests of high-$Q^2$ electroweak effects\nof the heavy bosons $Z^0$ and $W$ are observed and found to be consistent with\nthe Standard Model expectation.",
        "category": "hep"
    },
    {
        "text": "The Ising model universality of the electroweak theory: Lattice simulations have shown that the first order electroweak phase\ntransition turns into a regular cross-over at a critical Higgs mass m_{H,c}. We\nhave developed a method which enables us to make a detailed investigation of\nthe critical properties of the electroweak theory at m_{H,c}. We find that the\ntransition falls into the 3d Ising universality class. The continuum limit\nextrapolation of the critical Higgs mass is m_{H,c} = 72(2) GeV, which implies\nthat there is no electroweak phase transition in the Standard Model.",
        "category": "hep"
    },
    {
        "text": "Dark Matter Signals at the LHC from a 3HDM: We analyse new signals of Dark Matter (DM) at the Large Hadron Collider (LHC)\nin a 3-Higgs Doublet Model (3HDM) where only one doublet acquires a Vacuum\nExpectation Value (VEV), preserving a parity $Z_2$. The other two doublets are\n\\textit{inert} and do not develop a VEV, leading to a {\\it dark scalar sector}\ncontrolled by $Z_2$, with the lightest CP-even dark scalar $H_1$ being the DM\ncandidate. This leads to the loop induced decay of the next-to-lightest scalar,\n$H_2 \\to H_1 f \\bar f$ ($f=u,d,c,s,b,e,\\mu,\\tau$), mediated by both dark CP-odd\nand charged scalars. This is a smoking-gun signal of the 3HDM since it is not\nallowed in the 2HDM with one inert doublet and is expected to be important when\n$H_2$ and $H_1$ are close in mass. In practice, this signature can be observed\nin the cascade decay of the SM-like Higgs boson, $h\\to H_1 H_2\\to H_1 H_1 f\n\\bar f$ into two DM particles and di-leptons/di-jets, where $h$ is produced\nfrom either gluon-gluon Fusion (ggF) or Vector Boson Fusion (VBF). However,\nthis signal competes with the tree-level channel $q\\bar q\\to H_1H_1Z^*\\to\nH_1H_1f \\bar f$. We devise some benchmarks, compliant with collider, DM and\ncosmological data, for which the interplay between these modes is discussed. In\nparticular, we show that the resulting detector signature, $\\Et\\; f \\bar f$,\nwith invariant mass of $ f \\bar f$ much smaller than $m_Z$, can potentially be\nextracted already during Run 2 and 3. For example, the $H_2\\to H_1\\gamma^*$ and\n$\\gamma^*\\to e^+e^-$ case will give a spectacular QED mono-shower signal.",
        "category": "hep"
    },
    {
        "text": "Universality of DC Electrical Conductivity from Holography: We propose a universal formula of dc electrical conductivity in rotational-\nand translational- symmetries breaking systems via the holographic duality.\nThis formula states that the ratio of the determinant of the dc electrical\nconductivities along any spatial directions to the black hole area density in\nzero-charge limit has a universal value. As explicit illustrations, we give\nseveral examples elucidating the validation of this formula: We construct an\nanisotropic black brane solution, which yields linear in temperature for the\nin-plane resistivity and insulating behavior for the out-of-plane resistivity;\nWe also construct a spatially isotropic black brane solution that both the\nlinear-T and quadratic-T contributions to the resistivity can be realized.",
        "category": "hep"
    },
    {
        "text": "Preheating in an inflationary model with disformal coupling: In this work, we investigate the preheating mechanism in a\ndisformally-coupled inflationary model where the scalar field $\\phi$ (which is\nthe inflaton field) naturally coupled to another matter field $\\chi$ induced by\nthe disformal transformation. In the present scenario, novel derivative\ninteractions mixing the kinetic terms of the two fields emerge inherently. We\nstart by deriving the evolution of the background system when the back reaction\non the background field is neglected. We examine the particle production due to\nparametric resonances in the models and find in Minkowski space that the stage\nof parametric resonances can be described by the Mathieu equation.\nInterestingly, we discover that broad resonances in our models can be typically\nachieved. Finally, we compare our results with previously studied model with\nderivative couplings.",
        "category": "hep"
    },
    {
        "text": "The study of leading twist light cone wave function of \u03b7_c meson: This paper is devoted to the study of leading twist light cone wave function\nof $\\eta_c$ meson. The moments of this wave function have been calculated\nwithin three approaches: potential models, nonrelativistic QCD and QCD sum\nrules. Using the results obtained within these approaches the model for the\nlight cone wave function of leading twist has been proposed. Being scale\ndependent light cone wave function has very interesting properties at scales\n$\\mu> m_c$: improvement of the accuracy of the model, appearance of\nrelativistic tail and violation of nonrelativistic QCD velocity scaling rules.\nThe last two properties are the properties of real leading twist light cone\nwave function of $\\eta_c$ meson.",
        "category": "hep"
    },
    {
        "text": "Dimensionally regulated one-loop box scalar integrals with massless\n  internal lines: Using the Feynman parameter method, we have calculated in an elegant manner a\nset of one$-$loop box scalar integrals with massless internal lines, but\ncontaining 0, 1, 2, or 3 external massive lines. To treat IR divergences (both\nsoft and collinear), the dimensional regularization method has been employed.\nThe results for these integrals, which appear in the process of evaluating\none$-$loop $(N\\ge 5)-$point integrals and in subdiagrams in QCD loop\ncalculations, have been obtained for arbitrary values of the relevant kinematic\nvariables and presented in a simple and compact form.",
        "category": "hep"
    },
    {
        "text": "A supersymmetric reduction on the three-sphere: We present the embedding of three-dimensional SO(4)$\\ltimes\\mathbb{R}^6$\ngauged $N=4$ supergravity with quaternionic target space\nSO(4,4)$/$(SO(4)$\\times$SO(4)) into $D=6$, $N=(1,0)$ supergravity coupled to a\nsingle chiral tensor multiplet through a consistent reduction on AdS$_3\\times\nS^3$.",
        "category": "hep"
    },
    {
        "text": "BPS jumping loci and special cycles: We study BPS jumping loci, or the subloci in moduli spaces of supersymmetric\nstring vacua where BPS states come into existence discontinuously. This\nphenomenon is distinct from wall-crossing. We argue that these loci should be\nthought of as special cycles in the sense of Noether-Lefschetz loci or special\nShimura subvarieties, which are indeed examples of BPS jumping loci for certain\nstring compactifications. We use the Hodge-elliptic genus as an informative\ntool, suggesting that our work can be extended to understand the jumping\nbehavior of motivic Donaldson-Thomas invariants.",
        "category": "hep"
    },
    {
        "text": "Neutrino production states in oscillation phenomena - are they pure or\n  mixed?: General quantum mechanical states of neutrinos produced by mechanisms outside\nthe Standard Model are discussed. The neutrino state is described by the\nMaki-Nakagawa-Sakata-Pontecorvo unitary mixing matrix only in the case of\nrelativistic neutrinos and Standard Model left-handed charge current\ninteraction. The problem of Wigner spin rotation caused by Lorentz\ntransformation from the rest production frame to the laboratory frame is\nconsidered. Moreover, the mixture of the neutrino states as a function of their\nenergy and parameters from the extension of the Standard Model are\ninvestigated. Two sources of mixture, the appearance of subdominant helicity\nstates, and mass mixing with several different mixing matrices are studied.",
        "category": "hep"
    },
    {
        "text": "Exact late time Hawking radiation and the information loss problem for\n  evaporating near-extremal black holes: In this paper we investigate the effects of gravitational backreaction for\nthe late time Hawking radiation of evaporating near-extremal black holes. This\nproblem can be studied within the framework of an effective one-loop solvable\nmodel on AdS_2. We find that the Hawking flux goes down exponentially and it is\nproportional to a parameter which depends on details of the collapsing matter.\nThis result seems to suggest that the information of the initial state is not\nlost and that the boundary of AdS_2 acts, at least at late times, as a sort of\nstretched horizon in the Reissner-Nordstrom spacetime.",
        "category": "hep"
    },
    {
        "text": "\u03c7_{cJ} polarizations at the Fermilab Tevatron: We propose the measurement of $\\chi_{cJ}$ polarizations at high energy hadron\ncolliders to study heavy quarkonium production mechanism. We find that the\ncolor-singlet model in the $k_t$ factorization approach predicts very different\nbehavior for $\\chi_{cJ}$ polarizations at the Fermilab Tevatron compared with\nthe NRQCD predictions in the collinear parton model. In the color-singlet $k_t$\nfactorization approach, for both $\\chi_{c1}$ and $\\chi_{c2}$ productions, the\nhelicity $h=0$ states dominate over other helicity states at large $p_T$. These\nproperties are very useful in distinguishing between the two production\nmechanisms which are related to the interesting issue of $J\\psi$ and $\\psi'$\npolarizations, and may provide a crucial test for the $k_t$ factorization\napproach.",
        "category": "hep"
    },
    {
        "text": "The topological susceptibility and pion decay constant from lattice QCD: We study the topological susceptibility, chi, in two flavour lattice QCD. We\nfind clear evidence for the expected suppression of chi at small quark mass.\nThe estimate of the pion decay constant, f_pi = 105 +/-5 +18/-10 MeV, is\nconsistent with the experimental value of approximately 93 MeV. We compare chi\nto the large-N_c prediction and find consistency over a large range of quark\nmasses.",
        "category": "hep"
    },
    {
        "text": "Finite-temperature spectral function of the vector mesons in an AdS/QCD\n  model: We use the soft-wall AdS/QCD model to investigate the finite-temperature\neffects on the spectral function in the vector channel. The dissociation of the\nvector meson tower onto the AdS black hole leads to the in-medium mass shift\nand the width broadening in a way similar to the lattice QCD results for the\nheavy quarkonium at finite temperature. We also show the momentum dependence of\nthe spectral function and find it consistent with screening in a hot wind.",
        "category": "hep"
    },
    {
        "text": "Hard exclusive production of two pions: Dipion mass distributions in\n  gamma* N -->pi pi N and gamma* gamma --> pi pi: The leading twist parametrization of dipion mass distribution in hard\nexclusive reactions is proposed. Its parameters are related to quark\ndistributions (usual and skewed) in the pion and to distributions amplitudes of\nmesons ($\\pi$, $\\rho$, etc.). We show that measurements of the shape of dipion\nmass distribution in hard exclusie reactions can give important information\nabout partonic structure of the pion. The expression for the amplitude of the\nreaction $\\gamma^*\\gamma\\to \\pi\\pi$ near the threshold in terms of singlet\nquark distribution in the pion is presented.",
        "category": "hep"
    },
    {
        "text": "On the form factor of physical mesons and their distribution function: This work addresses more to the technical rather than to the physical\nproblem, how to calculate analytically the form factor $F(Q)$, the associated\nmean-square radius $<r^2>$, and the distribution function $\\Phi(x,Q^2)$ for a\ngiven light-cone wave function $\\Psi_{q\\bar q}(x,\\vec k_{\\perp})$ of the pion.\nThey turn out to be functions of only one dimensionless parameter, which is the\nratio of the constituent quark mass and an effective Bohr momentum which\nmeasures the width of the wave function in momentum space. Both parameters are\nsubject to change in the future, when the presently used solution for the over\nsimplified $\\uparrow\\downarrow$-model will be replaced by something better.\nTheir relation to and agreement with experiment is discussed in detail.\n  The procedure can be generalized also to other hadrons.",
        "category": "hep"
    },
    {
        "text": "The Novel Scaling of Tsallis Parameters from the Transverse Momentum\n  Spectra of Charged Particles in Heavy-Ion Collisions: The transverse momentum $(p_T)$ spectra of charged particles measured in Au +\nAu collisions from the beam energy scan (BES) program, Cu + Cu collisions at\n$\\sqrt{s_{NN}}=62.4$, 200 GeV at the RHIC and Pb + Pb, Xe + Xe collisions at\nthe LHC are investigated in the framework of Tsallis thermodynamics. The theory\ncan describe the experimental data well for all the collision systems, energies\nand centralities investigated. The collision energy and centrality dependence\nof the Tsallis distribution parameters, i.e., the temperature $T$ and the\nnonextensive parameter $q$, for the \\mbox{A + A} collisions are also studied\nand discussed. A novel scaling between the temperature divided by the natural\nlogarithm of collision energy $(T/\\ln\\sqrt{s})$ and the nonextensive parameter\n$q$ is presented.",
        "category": "hep"
    },
    {
        "text": "Positivity bounds on generalized parton distributions in impact\n  parameter representation: New positivity bounds are derived for generalized (off-forward) parton\ndistributions using the impact parameter representation. These inequalities are\nstable under the evolution to higher normalization points. The full set of\ninequalities is infinite. Several particular cases are considered explicitly.",
        "category": "hep"
    },
    {
        "text": "Fuzzy Scalar Field Theory as Matrix Quantum Mechanics: We study the phase diagram of scalar field theory on a three dimensional\nEuclidean spacetime whose spatial component is a fuzzy sphere. The\ncorresponding model is an ordinary one-dimensional matrix model deformed by\nterms involving fixed external matrices. These terms can be approximated by\nmultitrace expressions using a group theoretical method developed recently. The\nresulting matrix model is accessible to the standard techniques of matrix\nquantum mechanics.",
        "category": "hep"
    },
    {
        "text": "On Minimal N=4 Topological Strings And The (1,k) Minimal Bosonic String: In this paper we consider tree-level scattering in the minimal N=4\ntopological string and show that a large class of N-point functions can be\nrecast in terms of corresponding amplitudes in the (1,k) minimal bosonic\nstring. This suggests a non-trivial relation between the minimal N=4\ntopological strings, the (1,k) minimal bosonic strings and their corresponding\nADE matrix models. This relation has interesting and far-reaching implications\nfor the topological sector of six-dimensional Little String Theories.",
        "category": "hep"
    },
    {
        "text": "Yangians, Grassmannians and T-duality: We investigate the Yangian symmetry of scattering amplitudes in N=4 super\nYang-Mills theory and show that its formulations in twistor and momentum\ntwistor space can be interchanged. In particular we show that the full symmetry\ncan be thought of as the Yangian of the dual superconformal algebra,\nannihilating the amplitude with the MHV part factored out. The equivalence of\nthis picture with the one where the ordinary superconformal symmetry is thought\nof as fundamental is an algebraic expression of T-duality. Motivated by this,\nwe analyse some recently proposed formulas, which reproduce different\ncontributions to amplitudes through a Grassmannian integral. We prove their\nYangian invariance by directly applying the generators.",
        "category": "hep"
    },
    {
        "text": "Lessons from the 3d U(1) Gross-Neveu Model: The effectiveness of the Glasgow algorithm is explored via implementation in\nthe 3d U(1) Gross-Neveu model and the realisation of the Goldstone mechanism in\nthis model is compared and contrasted with its realisation in QCD.",
        "category": "hep"
    },
    {
        "text": "Measuring Oscillations with A Million Atmospheric Neutrinos: After two decades of measurements, neutrino physics is now advancing into the\nprecision era. Withthe long-baseline experiments designed to tackle current\nopen questions, a new query arises: can atmospheric neutrino experiments also\nplay a role? To that end, we analyze the expected sensitivity of current and\nnear-future water(ice)-Cherenkov atmospheric neutrino experiments in the\ncontext of standard three-flavor neutrino oscillations. In this first in depth\ncombined atmospheric neutrino analysis, we analyze the current shared\nsystematic uncertainties arising from the common flux and neutrino-water\ninteractions. We then implement the systematic uncertainties of each experiment\nin detail and develop the atmospheric neutrino simulations for\nSuper-Kamiokande, with and without neutron-tagging capabilities, IceCube\nUpgrade, ORCA, and Hyper-Kamiokande detectors. We carefully review the\nsynergies and features of these experiments to examine the potential of a joint\nanalysis of these atmospheric neutrino data in resolving the $\\theta_{23}$\noctant at 99% confidence level, and determining the neutrino mass ordering\nabove 5$\\sigma$ by 2030. Additionally, we assess the capability to constrain\n$\\theta_{13}$ and the CP -violating phase ($\\delta_{CP}$) in the leptonic\nsector independently from reactor and accelerator neutrino data. A combination\nof the atmospheric neutrino measurements will enhance the sensitivity to a\ngreater extent than the simple sum of individual experiment results reaching\nmore than 3$\\sigma$ for some values of $\\delta_{CP}$ . These results will\nprovide vital information for next-generation accelerator neutrino oscillation\nexperiments such as DUNE and Hyper-Kamiokande.",
        "category": "hep"
    },
    {
        "text": "Susceptibility of the QCD vacuum to CP-odd electromagnetic background\n  fields: We investigate two flavor QCD in presence of CP-odd electromagnetic\nbackground fields and determine, by means of lattice QCD simulations, the\ninduced effective theta term to the first order in the scalar product of E and\nB. We employ a rooted staggered discretization and study lattice spacings down\nto 0.1 fm and Goldstone pion masses around 480 MeV. In order to deal with a\npositive measure, we consider purely imaginary electric fields and real\nmagnetic fields, then exploiting analytic continuation. Our results are\nrelevant to a description of the effective pseudoscalar QED-QCD interactions.",
        "category": "hep"
    },
    {
        "text": "An Explanation for the rho-pi Puzzle of J/psi and psi' Decays: We propose a new explanation for the longstanding puzzle of the tiny\nbranching fraction of psi' -> rho pi relative to that for J/psi -> rho pi. In\nthe case of J/psi, we argue that this decay is dominated by a higher Fock state\nin which the ccbar pair is in a color-octet ^3S_1 state and via annihilate\nprocess ccbar -> qqbar. In the case of the psi', we argue that the probability\nfor the ccbar pair in this higher Fock state to be close enough to annihilate\nis suppressed by a dynamical effect related to the small energy gap between the\nmass of the psi' and the DDbar threshold.",
        "category": "hep"
    },
    {
        "text": "More Modular Invariant Anomalous U(1) Breaking: We consider the case of several scalar fields, charged under a number of U(1)\nfactors, acquiring vacuum expectation values due to an anomalous U(1). We\ndemonstrate how to make redefinitions at the superfield level in order to\naccount for tree-level exchange of vector supermultiplets in the effective\nsupergravity theory of the light fields in the supersymmetric vacuum phase. Our\napproach builds upon previous results that we obtained in a more elementary\ncase. We find that the modular weights of light fields are typically shifted\nfrom their original values, allowing an interpretation in terms of the\npreservation of modular invariance in the effective theory. We address various\nsubtleties in defining unitary gauge that are associated with the noncanonical\nKahler potential of modular invariant supergravity, the vacuum degeneracy, and\nthe role of the dilaton field. We discuss the effective superpotential for the\nlight fields and note how proton decay operators may be obtained when the heavy\nfields are integrated out of the theory at the tree-level. We also address how\nour formalism may be extended to describe the generalized Green-Schwarz\nmechanism for multiple anomalous U(1)'s that occur in four-dimensional Type I\nand Type IIB string constructions.",
        "category": "hep"
    },
    {
        "text": "Mission Target: Tetraquark Mesons of Flavour-Cryptoexotic Type: Currently, flavour-cryptoexotic tetraquarks form the most common sort of all\nexperimentally established exotic multiquark hadrons. This note points out a\nfew promising concepts that should help improve theoretical (but, for several\nreasons, not quite straightforward) analyses of such kind of states: among\nothers, their scope of application encompasses the strong interactions in the\nlimit of (arbitrarily) large numbers of colours, and equally analytical and\nnonperturbative approaches to multiquark states.",
        "category": "hep"
    },
    {
        "text": "The $\u03b3^* \\lowercase{p}$ total cross section at low x: The scaling in $\\sigma_{\\gamma^*p}(W^2, Q^2)$ cross sections (for $Q^2/W^2 <<\n1$) in terms of the scaling variable $\\eta = (Q^2 + m^2_0)/\\Lambda^2 (W^2)$ is\ninterpreted in the generalized vector dominance/color-dipole picture (GVD/CDP).\nThe quantity $\\Lambda^2 (W^2)$ is identified as the average gluon transverse\nmomentum absorbed by the $q \\bar q$ state, $<\\vec l_\\bot^{~2}> = (1/6)\n\\Lambda^2 (W^2)$. At any $Q^2$, for $W^2 \\to \\infty$, the cross sections for\nvirtual and real photons become universal,$\\sigma_{\\gamma^*p}(W^2,Q^2)/\n\\sigma_{\\gamma p} (W^2) \\to 1$. The gluon density corresponding to the\ncolor-dipole cross section in the appropriate limit is found to be consistent\nwith the results from QCD fits.",
        "category": "hep"
    },
    {
        "text": "Density, short-range order and the quark-gluon plasma: We study the thermal part of the energy density spatial correlator in the\nquark-gluon plasma. We describe its qualitative form at high temperatures. We\nthen calculate it out to distances approx. 1.5/T in SU(3) gauge theory lattice\nsimulations for the range of temperatures 0.9<= T/T_c<= 2.2. The\nvacuum-subtracted correlator exhibits non-monotonic behavior, and is almost\nconformal by 2T_c. Its broad maximum at r approx. 0.6/T suggests a dense medium\nwith only weak short-range order, similar to a non-relativistic fluid near the\nliquid-gas phase transition, where eta/s is minimal.",
        "category": "hep"
    },
    {
        "text": "Towards an all-orders calculation of the electroweak bubble wall\n  velocity: We analyze Higgs condensate bubble expansion during a first-order electroweak\nphase transition in the early Universe. The interaction of particles with the\nbubble wall can be accompanied by the emission of multiple soft gauge bosons.\nWhen computed at fixed order in perturbation theory, this process exhibits\nlarge logarithmic enhancements which must be resummed to all orders when the\nwall velocity is large. We perform this resummation both analytically and\nnumerically at leading logarithmic accuracy. The numerical simulation is\nachieved by means of a particle shower in the broken phase of the electroweak\ntheory. The two approaches agree to the 10\\% level. For fast-moving walls, we\nfind the scaling of the thermal pressure exerted against the wall to be $P\\sim\n\\gamma^2T^4$, independent of the particle masses, implying a significantly\nslower terminal velocity than previously suggested.",
        "category": "hep"
    },
    {
        "text": "Higgs particles interacting via a scalar Dark Matter field: We study a system of two Higgs bound state, interacting via a real scalar\nDark Matter mediating field, without imposing $Z_2$ symmetry on the DM sector\nof the postulated Lagrangian. The variational method in the Hamiltonian\nformalism of QFT is used to derive relativistic wave equations for the\ntwo-Higgs system, using a truncated Fock-space trial state. Approximate\nsolutions of the 2-body relativistic coupled integral equations are presented,\nand conditions for the existence of Higgs bound states is examined in a broad\nparameter space of DM mass and coupling constants.",
        "category": "hep"
    },
    {
        "text": "Expansion of bound-state energies in powers of m/M: We describe a new approach to computing energy levels of a non-relativistic\nbound-state of two constituents with masses M and m, by a systematic expansion\nin powers of m/M. After discussing the method, we demonstrate its potential\nwith an example of the radiative recoil corrections to the Lamb shift and\nhyperfine splitting relevant for the hydrogen, muonic hydrogen, and muonium. A\ndiscrepancy between two previous calculations of O(alpha(Zalpha)^5 m^2/M)\nradiative recoil corrections to the Lamb shift is resolved and several new\nterms of O(alpha(Zalpha)^5 m^4/M^3) and higher are obtained.",
        "category": "hep"
    },
    {
        "text": "Perturbative BPS-algebras in superstring theory: This paper investigates the algebraic structure that exists on perturbative\nBPS-states in the superstring, compactified on the product of a circle and a\nCalabi-Yau fourfold. This structure was defined in a recent article by Harvey\nand Moore. It shown that for a toroidal compactification this algebra is\nrelated to a generalized Kac-Moody algebra. The BPS-algebra itself is not a\nLie-algebra. However, it turns out to be possible to construct a Lie-algebra\nwith the same graded dimensions, in terms of a half-twisted model. The\ndimensions of these algebras are related to the elliptic genus of the\ntransverse part of the string algebra. Finally, the construction is applied to\nan orbifold compactification of the superstring.",
        "category": "hep"
    },
    {
        "text": "On the stability of string-hole gas: Focusing on a string-hole gas within the pre-big bang scenario, we study the\nstability of its solutions in the phase space. We firstly extend the analysis\npresent in the literature relaxing the ideal-gas properties of the string-hole\ngas, taking into account a (bulk-)viscosity term. Then we consider the case of\na theory described by a complete O(d,d)-invariant action up to all orders in\n$\\alpha^{\\prime}$-corrections (the Hohm-Zwiebach action), studying the\nstability of the string-hole gas solution with or without the introduction of\nthe viscosity term. Furthermore, the bulk viscosity is also considered for two\ndifferent first order $\\alpha^{\\prime}$-corrected actions: the\nGasperini-Maggiore-Veneziano-action and the Meissner-action. The results\nobtained show how the viscosity can help to stabilize the string-hole gas\nsolution, obtaining constraints on the equation of state of the gas.",
        "category": "hep"
    },
    {
        "text": "Scaling Behavior in 4D Simplicial Quantum Gravity: Scaling relations in four-dimensional simplicial quantum gravity are proposed\nusing the concept of the geodesic distance. Based on the analogy of a loop\nlength distribution in the two-dimensional case, the scaling relations of the\nboundary volume distribution in four dimensions are discussed in three regions:\nthe strong-coupling phase, the critical point and the weak-coupling phase. In\neach phase a different scaling behavior is found.",
        "category": "hep"
    },
    {
        "text": "Evolution of Wilson Loop in Time-Dependent N=4 Super Yang-Mills Plasma: Using holography we have studied the time-dependent potential of a\nquark-antiquark pair in a dynamical strongly coupled plasma. The time-dependent\nplasma, whose dynamics is originated from the energy injection, is dual to\nAdS-Vaidya background. The quark-antiquark pair is represented by the endpoints\nof a string stretched from the boundary to the bulk. The evolution of the\nsystem is studied by evaluating the potential between quark and anti-quark,\nextracted from the expectation value of the Wilson loop, throughout the\nprocess. Our results show that the time-dependent potential depends on the\nspeed of injecting energy as well as the final temperature of the plasma. For\nhigh enough temperatures and rapid energy injection, the potential starts\noscillating around its equilibrium value, immediately after the injection.",
        "category": "hep"
    },
    {
        "text": "Dark Matter in scalar Sp(N) gauge dynamics: We consider a model with Sp dark gauge group and a scalar field in the\nfundamental representation, which leads to two co-stable DM candidates at the\nperturbative level thanks to a global U(1) accidental symmetry. After gauge\nconfinement at low energy scale, only one of the two candidates is still\nstable. We compute the DM relic abundance by solving the Boltzmann equations\nnumerically. The presence of light dark glueballs gives extra cosmological\neffects and can affect Higgs physics. We study the DM phenomenology, providing\nthe predictions for direct and indirect detection (including the Sommerfeld\nenhancement). We show that the model predicts a slightly suppressed indirect\ndetection cross section in comparison to the usual WIMPs paradigm.",
        "category": "hep"
    },
    {
        "text": "Selecting mu -> e Conversion Targets to distinguish Lepton\n  Flavour-Changing Operators: The experimental sensitivity to $\\mu \\to e$ conversion on nuclei is set to\nimprove by four orders of magnitude in coming years. However, various operator\ncoefficients add coherently in the amplitude for $\\mu \\to e$ conversion,\nweighted by nucleus-dependent functions, and therefore in the event of a\ndetection, identifying the relevant new physics scenarios could be difficult.\nUsing a representation of the nuclear targets as vectors in coefficient space,\nwhose components are the weighting functions, we quantify the expectation that\ndifferent nuclear targets could give different constraints.We show that all but\ntwo combinations of the 10 Spin-Independent (SI) coefficients could be\nconstrained by future measurements, but discriminating among the axial, tensor\nand pseudoscalar operators that contribute to the Spin-Dependent (SD) process\nwould require dedicated nuclear calculations. We anticipate that $\\mu \\to e$\nconversion could constrain 10 to 14 combinations of coefficients; if $\\mu \\to e\n\\gamma$ and $\\mu \\to 3e$ constrain eight more, that leaves 60 to 64 \"flat\ndirections\" in the basis of QED$\\times$QCD-invariant operators which describe\n$\\mu \\to e$ flavour change below $m_W$.",
        "category": "hep"
    },
    {
        "text": "Magnetic Catalysis in AdS4: We study the formation of fermion condensates in Anti de Sitter space. In\nparticular, we describe a novel version of magnetic catalysis that arises for\nfermions in asymptotically AdS4 geometries which cap off in the infra-red with\na hard wall. We show that the presence of a magnetic field induces a fermion\ncondensate in the bulk that spontaneously breaks CP symmetry. From the\nperspective of the dual boundary theory, this corresponds to a strongly coupled\nversion of magnetic catalysis in d=2+1.",
        "category": "hep"
    },
    {
        "text": "Analytic Calculation of Prompt Photon plus Associated Heavy Flavor at\n  Next-to-Leading Order in QCD: Contributions through second order, $O(\\alpha ^2_s)$, in perturbative quantum\nchromodynamics are calculated analytically for inclusive associated production\nof a prompt photon and a charm quark at large values of transverse momentum in\nhigh energy hadron-hadron collisions. Seven partonic subprocesses contribute at\norder $\\alpha^2_s$. We find important corrections to the lowest order,\n$O(\\alpha_s)$, subprocess $c g \\rightarrow \\gamma c$. We demonstrate to what\nextent data from $p +\\bar{p}\\rightarrow \\gamma + c + X$ may serve to measure\nthe charm quark density in the nucleon.",
        "category": "hep"
    },
    {
        "text": "The Chirality of $b$ Quark Couplings: This review addresses the question of the chirality of $b$ quark weak\ncouplings from a theoretical and from a purely phenomenological point of view.\nDue to their small magnitude $b$ decay couplings are subject to possible large\ncorrections from right-handed terms, on the one hand, and do not affect the\nweak interactions of the first two quark families in any observable manner, on\nthe other hand. This motivated an $SU(2)_L\\times SU(2)_R\\times U(1)$ model with\npurely right-handed $b$-decay couplings. The model is consistent with\nexperiments, including recent measurements of a lepton forward-backward\nasymmetry in $B\\to D^*\\ell\\nu$ and of radiative $B$ decays. Parity violating\nasymmetries in semileptonic decays of polarized $\\Lambda_b$ baryons produced in\n$Z^0$ decays provide a promising way of measuring the chirality of the $b$ to\n$c$ current.",
        "category": "hep"
    },
    {
        "text": "Compactifications of F-Theory on Calabi-Yau Fourfolds: The enhanced gauge groups in F-theory compactified on elliptic Calabi-Yau\nfourfolds are investigated in terms of toric geometry.",
        "category": "hep"
    },
    {
        "text": "Parametrization of lepton mixing matrix in terms of deviations from\n  bi-maximal and tri-bimaximl mixing: We parametrize lepton mixing matrix, known as PMNS matrix, in terms of three\nparameters which account deviations of three mixing angles from their\nbi-maximal or tri-bimaximal values. On the basis of this parametrization we can\ndetermine corresponding charged lepton mixing matrix in terms of those three\nparameters which can deviate bi-maximal or tri-bimaximal mixing. We find that\nthe charged lepton mixing matrices which can deviate bi-maximal mixing matrix\nand tri-bimaximal mixing matrix exhibit similar structures. Numerical analysis\nshows that these charged lepton mixing matrices are close to CKM matrix of\nquark sector.",
        "category": "hep"
    },
    {
        "text": "Next-to-Next-to-Leading-Order QCD Prediction for the Photon-Pion Form\n  Factor: We accomplish the complete two-loop computation of the leading-twist\ncontribution to the photon-pion transition form factor $\\gamma \\, \\gamma^{\\ast}\n\\to \\pi^0$ by applying the hard-collinear factorization theorem together with\nmodern multi-loop techniques. The resulting predictions for the form factor\nindicate that the two-loop perturbative correction is numerically important. We\nalso demonstrate that our results will play a key role in disentangling various\nmodels of the twist-two pion distribution amplitude thanks to the envisaged\nprecision at Belle II.",
        "category": "hep"
    },
    {
        "text": "Parton distributions: a new global analysis: We present a new analysis of parton distributions of the proton. This\nincorporates a wide range of new data, an improved treatment of heavy flavours\nand a re-examination of prompt photon production. The new set (MRST) shows\nsystematic differences from previous sets of partons which can be identified\nwith particular features of the new data and with improvements in the analysis.\nWe also investigate the sensitivities of the results to (i) the uncertainty in\nthe determination of the gluon at large x, (ii) the value of alpha_S(M_Z^2) and\n(iii) the minimum Q^2 cut on the data that are included in the global fit.",
        "category": "hep"
    },
    {
        "text": "Fermion propagator in out of equilibrium quantum-field system and the\n  Boltzmann equation: We aim to construct from first principles a perturbative framework for\nstudying nonequilibrium quantum-field systems that include massless Dirac\nfermions. The system of our concern is quasiuniform system near equilibrium or\nnonequilibrium quasistationary system. We employ the closed-time-path formalism\nand use the so-called gradient approximation. Essentially no further\napproximation is introduced. We construct a fermion propagator, with which a\nwell-defined perturbative framework is formulated. In the course of\nconstruction of the framework, we obtain the generalized Boltzmann equation\n(GBE) that describes the evolution of the number-density functions of\n(anti)fermionic quasiparticles.",
        "category": "hep"
    },
    {
        "text": "Regularization dependence on the Schwinger-Dyson equation in Abelian\n  gauge theory: 4D vs 3D cutoff regularization: We study the regularization dependence on the quenched Schwinger-Dyson\nequations in general gauge by applying the two types of regularizations, the\nfour and three dimensional momentum cutoffs. The obtained results indicate that\nthe solutions are not drastically affected by the choice of two different\ncutoff prescriptions. We then think that both the regularizations can nicely be\nadopted in the analyses for the Schwinger-Dyson equations.",
        "category": "hep"
    },
    {
        "text": "On nonrelativistic 3D Spin-1 theories: We describe non-relativistic limits of the 3D Proca and square-root Proca\ntheories that yield spin-1 Schroedinger equations. Analogous results are found\nby generalized null reduction of the 4D Maxwell or complex self-dual Maxwell\nequations. We briefly discuss the extension to spin-2.",
        "category": "hep"
    },
    {
        "text": "Spin Correlations in Top Quark Production and the Top Quark Mass: Top-antitop quark pairs produced at the Tevatron have a sizeable spin\ncorrelation. That correlation feeds into the angular distribution of the decay\nproducts, particularly in the dilepton channel. Including the expected\ncorrelation in an overall analysis of a handful of actual dilepton events\ncontinues to favor a lower top mass (centered on 155 GeV) than the single\nlepton events.",
        "category": "hep"
    },
    {
        "text": "Restrictions on the lifetime of sterile neutrinos from primordial\n  nucleosynthesis: We analyze the influence of decaying sterile neutrinos with the masses in the\nrange 1-140 MeV on the primordial Helium-4 abundance, explicitly solving the\nBoltzmann equations for all particle species, taking into account neutrino\nflavour oscillations, and paying special attention to systematic uncertainties.\nWe show that the Helium abundance depends only on the sterile neutrino lifetime\nand not on the way the active-sterile mixing is distributed between flavours,\nand derive an upper bound on the lifetime. We also demonstrate that the recent\nresults of Izotov & Thuan [arXiv:1001.4440], who find 2sigma higher than\npredicted by the standard primordial nucleosynthesis value of Helium-4\nabundance, are consistent with the presence in the plasma of sterile neutrinos\nwith the lifetime 0.01-2 seconds. The decay of these particles perturbs the\nspectra of (decoupled) neutrinos and heats photons, changing the ratio of\nneutrino to photon energy density, that can be interpreted as extra neutrino\nspecies at the recombination epoch.",
        "category": "hep"
    },
    {
        "text": "Colour-dressed hexagon tessellations for correlation functions and\n  non-planar corrections: We continue the study of four-point correlation functions by the hexagon\ntessellation approach initiated in 1611.05436 and 1611.05577. We consider\nplanar tree-level correlation functions in $\\mathcal{N} = 4$ supersymmetric\nYang-Mills theory involving two non-protected operators. We find that, in order\nto reproduce the field theory result, it is necessary to include $SU(N)$ colour\nfactors in the hexagon formalism; moreover, we find that the hexagon approach\nas it stands is naturally tailored to the single-trace part of correlation\nfunctions, and does not account for multi-trace admixtures. We discuss how to\ncompute correlators involving double-trace operators, as well as more general\n$1/N$ effects; in particular we compute the whole next-to-leading order in the\nlarge-$N$ expansion of tree-level BMN two-point functions by tessellating a\ntorus with punctures. Finally, we turn to the issue of \"wrapping\",\nL\\\"uscher-like corrections. We show that $SU(N)$ colour-dressing reproduces an\nearlier empirical rule for incorporating single-magnon wrapping, and we provide\na direct interpretation of such wrapping processes in terms of $\\mathcal{N}=2$\nsupersymmetric Feynman diagrams.",
        "category": "hep"
    },
    {
        "text": "Flavour Dependence of Form Factors in Heavy Meson Decays: Recently we have shown that due account of Wigner spin rotations is needed to\nmatch the ISGW model consistently onto HQET. We now discuss the flavour\ndependence of this procedure. We find that for finite mass ``heavy'' quark the\nuniversal function $\\xi(y=1) \\approx 1$ but the slope is proportional to the\nenergy of the spectator quarks, and ratios of form factors are corrected in a\nway that QCD sum rules seem to require. Predictions for heavy quarks, such as\nin $B_c \\rightarrow \\psi(\\eta_c)$ and to mixed systems, such as $D\\rightarrow\nK$ and $B \\rightarrow \\pi$ show a systematic mass dependence that may be\nconfronted with data.",
        "category": "hep"
    },
    {
        "text": "Electric dipole moments: a theory overview: Electric dipole moments are extremely sensitive probes of physics beyond the\nStandard Model. A vibrant experimental program is in place, with the goal of\nimproving existing bounds on the electron and neutron electric dipole moments\nby one or two orders of magnitude, while testing new ideas for the measurement\nof electric dipole moments of light ions, such as the proton and the deuteron,\nat a comparable level. The success of this program, and its implications for\nphysics beyond the Standard Model, relies on the precise calculation of the\nelectric dipole moments in terms of the couplings of CP-violating operators\ninduced by beyond-the-Standard-Model physics. In light of the nonperturbative\nnature of both QCD at low energy and of the nuclear interactions, these\ncalculations have proven difficult, and are affected by large theoretical\nuncertainties. In this talk I will review the progress that has been achieved\non different aspects of the calculation of hadronic and nuclear EDMs, the\nchallenges that remain to be faced, and the implications for our understanding\nof physics beyond the Standard Model.",
        "category": "hep"
    },
    {
        "text": "Non-trivial Test of Electroweak Quantum Effects: Based on recent $W$-mass measurements, the electroweak theory is tested at\nnon-trivial quantum correction level, i.e., beyond the Born approximation with\n$\\alpha(M_Z)$ instead of $\\alpha$. We can conclude that some non-Born type\ncorrections must exist at more than 92 % confidence level, and the\nnon-decoupling top-quark corrections are required at 97 % confidence level.",
        "category": "hep"
    },
    {
        "text": "M-momentum Transfer between Gravitons, Membranes, and Fivebranes as\n  Perturbative Gauge Theory Processes: Polchinski and Pouliot have shown that M-momentum transfer between membranes\nin supergravity can be understood as a non-perturbative instanton effect in\ngauge theory. Here we consider a dual process: electric flux transmission\nbetween D-branes. We show that this process can be described in perturbation\ntheory as virtual string pair creation, and is closely related to Schwinger's\ntreatment of the pair creation of charged particles in a uniform electric\nfield. Through the application of dualities, our perturbative calculation gives\nresults for various non-perturbative amplitudes, including M-momentum transfer\nbetween gravitons, membranes, and longitudinal fivebranes. Thus perturbation\ntheory plus dualities are sufficient to demonstrate agreement between\nsupergravity and gauge theory for a number of M-momentum transferring\nprocesses. A variety of other processes where branes are transmitted between\nbranes, e.g. (p,q)-string transmission in IIB-theory, can also be studied. We\ndiscuss the implications of our results for proving the 11 dimensional Lorentz\ninvariance of Matrix theory.",
        "category": "hep"
    },
    {
        "text": "Hydrodynamic scaling from the dynamics of relativistic quantum field\n  theory: Hydrodynamic behavior is a general feature of interacting systems with many\ndegrees of freedom constrained by conservation laws. To date hydrodynamic\nscaling in relativistic quantum systems has been observed in many high energy\nsettings, from cosmic ray detections to accelerators, with large particle\nmultiplicity final states. Here we show first evidence for the emergence of\nhydrodynamic scaling in the dynamics of a relativistic quantum field theory. We\nconsider a simple scalar $\\lambda \\phi^4$ model in 1+1 dimensions in the\nHartree approximation and study the dynamics of two colliding kinks at\nrelativistic speeds as well as the decay of a localized high energy density\nregion. The evolution of the energy-momentum tensor determines the dynamical\nlocal equation of state and allows the measurement of the speed of sound.\nHydrodynamic scaling emerges at high local energy densities.",
        "category": "hep"
    },
    {
        "text": "Semi-transparent Boundary Conditions in the Worldline Formalism: The interaction of a quantum field with a background containing a Dirac delta\nfunction with support on a surface of codimension 1 represents a particular\nkind of matching conditions on that surface for the field. In this article we\nshow that the worldline formalism can be applied to this model. We obtain the\nasymptotic expansion of the heat-kernel corresponding to a scalar field on\n$\\mathbb{R}^{d+1}$ in the presence of an arbitrary regular potential and\nsubject to this kind of matching conditions on a flat surface. We also consider\ntwo such surfaces and compute their Casimir attraction due to the vacuum\nfluctuations of a massive scalar field weakly coupled to the corresponding\nDirac deltas.",
        "category": "hep"
    },
    {
        "text": "Global properties of proton-proton collisions at $\\sqrt{s}$ = 100 TeV: The global properties of the final states produced in hadronic interactions\nof protons at centre-of-mass energies of future hadron colliders (such as\nFCC-hh at CERN, and SppC in China), are studied. The predictions of various\nMonte Carlo (MC) event generators used in collider physics (PYTHIA 6, PYTHIA 8,\nand PHOJET) and in ultrahigh-energy cosmic-rays studies (EPOS, and QGSJET) are\ncompared. Despite their different underlying modeling of hadronic interactions,\ntheir predictions for proton-proton (p-p) collisions at $\\sqrt{s}$ = 100 TeV\nare quite similar. The average of all MC predictions (except PHOJET) for the\ndifferent observables are: (i) p-p inelastic cross sections $\\sigma_{\\rm inel}$\n= 105 $\\pm$ 2 mb; (ii) total charged multiplicity $\\rm N_{_{\\rm ch}}$ = 150\n$\\pm$ 20; (iii) charged particle pseudorapidity density at midrapidity $\\rm\ndN_{ch}/d\\eta|_{\\eta=0} = 9.6 \\pm 0.2$; (iv) energy density at midrapidity $\\rm\ndE/d\\eta|_{\\eta=0} = 13.6 \\pm 1.5$ GeV, and $\\rm dE/d\\eta|_{\\eta=5} = 670 \\pm\n70$ GeV at the edge of the central region; and (v) average transverse momenta\nat midrapidities $\\rm < p_{T}> = 0.76 \\pm 0.07$ GeV/c. At midrapidity, EPOS and\nQGSJET-II predict larger per-event multiplicity probabilities at very low ($\\rm\nN_{\\rm ch}<3$) and very high ($\\rm N_{\\rm ch}>100$) particle multiplicities,\nwhereas PYTHIA 6 and 8 feature higher yields in the intermediate region $\\rm\nN_{\\rm ch}\\approx$ 30--80. These results provide useful information for the\nestimation of the detector occupancies and energy deposits from pileup\ncollisions at the expected large FCC-hh/SppC luminosities.",
        "category": "hep"
    },
    {
        "text": "Infrared Saturation and Phases of Gauge Theories with BRST Symmetry: We investigate the infrared limit of the quantum equation of motion of the\ngauge boson propagator in various gauges and models with a BRST symmetry. We\nfind that the saturation of this equation at low momenta distinguishes between\nthe Coulomb, Higgs and confining phase of the gauge theory. The Coulomb phase\nis characterized by a massless gauge boson. Physical states contribute to the\nsaturation of the transverse equation of motion of the gauge boson at low\nmomenta in the Higgs phase, while the saturation is entirely due to unphysical\ndegrees of freedom in the confining phase. This corollary to the Kugo-Ojima\nconfinement criterion in linear covariant gauges also is sufficient for\nconfinement in general covariant gauges with BRST- and anti-BRST symmetry,\nmaximal Abelian gauges with an equivariant BRST symmetry, non-covariant Coulomb\ngauge and in the Gribov-Zwanziger theory.",
        "category": "hep"
    },
    {
        "text": "Black Hole's 1/N Hair: According to the standard view classically black holes carry no hair, whereas\nquantum hair is at best exponentially weak. We show that suppression of hair is\nan artifact of the semi-classical treatment and that in the quantum picture\nhair appears as an inverse mass-square effect. Such hair is predicted in the\nmicroscopic quantum description in which a black hole represents a\nself-sustained leaky Bose-condensate of N soft gravitons. In this picture the\nHawking radiation is the quantum depletion of the condensate. Within this\npicture we show that quantum black hole physics is fully compatible with\ncontinuous global symmetries and that global hair appears with the strength\nB/N, where B is the global charge swallowed by the black hole. For large charge\nthis hair has dramatic effect on black hole dynamics. Our findings can have\ninteresting astrophysical consequences, such as existence of black holes with\nlarge detectable baryonic and leptonic numbers.",
        "category": "hep"
    },
    {
        "text": "Using Earth to Search for Long-Range Spin-Velocity Interactions: Precision measurements of the possible coupling of spin to other scalars,\nvectors and pseudovectors has proven to be a sensitive way to search for new\nparticle physics beyond the standard model. Indeed, in addition to searching\nfor exotic spin-spin interactions, studies have been undertaken to look for\ncouplings of spin to gravity, the relative velocity between particles, and\npreferred directions. Several laboratory experiments have established upper\nbounds on the energy associated with various fermion spin-orientations relative\nto Earth. Here, we combine these results with a model of Earth in order to\ninvestigate the possible long-range spin-velocity interactions associated with\nthe exchange of ultralight ($m_{z'}<1$ neV) or massless scalar or vector\nbosons. We establish stringent bounds on the strength of these couplings\nbetween electrons, neutrons, protons and nucleons.",
        "category": "hep"
    },
    {
        "text": "Inflationary non-Gaussianities in alpha vacua and consistency with\n  conformal symmetries: We study the conformal invariance of inflationary non-Gaussianities\nassociated with scalar fluctuations in a non-Bunch-Davies initial state, known\nas the $\\alpha$-vacuum, in single-field slow-roll inflation. The\n$\\alpha$-vacuum is a one-parameter family of states, including the Bunch-Davies\none, that preserves the conformal symmetry of inflationary dynamics in a nearly\nde-Sitter space-time. Working within the leading slow-roll approximation, we\ncompute the four-point scalar correlator (the trispectrum) in $\\alpha$-vacuum\nusing the in-in formalism. We check that the conformal Ward identities are met\nbetween the three and four-point scalar $\\alpha$-vacua correlators.\nSurprisingly, this contrasts the previously reported negative result of the\nWard identities being violated between the two and the three-point correlators.\nWe have also extended the wave-functional method, previously used for\ncorrelators with Bunch-Davies initial condition, to compute the three and\nfour-point scalar correlators in $\\alpha$-vacua. The results obtained from the\nwave-function method match the corresponding in-in results, adding further\njustification to our check of Ward identities with $\\alpha$-vacua correlators.",
        "category": "hep"
    },
    {
        "text": "Flavored gauge mediation in the Peccei-Quinn NMSSM: We investigate a particular version of the Peccei-Quinn (PQ) NMSSM\ncharacterized by an economical and rigidly hierarchical flavor structure and\nbased on flavored gauge mediation and on some considerations inspired by string\ntheory GUTs. In this way we can express the Lagrangian of the PQ NMSSM through\nvery few parameters. The obtained model is studied numerically and confronted\nwith the most relevant phenomenological constraints. We show that typical\nspectra are for the most part too heavy to be significantly probed at the LHC,\nbut regions of the parameter space exist yielding signatures that might\npossibly be observed during Run II. We also calculate the fine tuning of the\nmodel. We show that, in spite of the appearance of large scales in the\nsuperpotential and soft terms, it does not exceed the tuning present in the\nMSSM for equivalent spectra, which is of the order of 10^4.",
        "category": "hep"
    },
    {
        "text": "A Test of SU(15) at HERA Using The HELAS Program: A possible SU(15) process at HERA is investigated. The process that we\nconsider is $e^- P\\ra \\bar\\nu_e \\mu^- \\mu^- +anything$ through the exchange of\nnew heavy gauge bosons $X^-$ and $X^{--}$ which are predicted in SU(15). This\nprocess produces two easily observable like-sign muons in the final state. The\ncross section of this process is calculated by using HELAS and VEGAS programs,\nand PDF-library functions. The cross section turns out to be small to be\nobserved in near future.",
        "category": "hep"
    },
    {
        "text": "Positronium-like states from supergravity: We study semi-classical rotating open strings ending on a probe Dp-brane\nclose to a stack of extremal, non-extremal Dp-branes and Dp-branes with\n$B$-fields. These states may be interpreted as positronium-like bound states of\nspinning W-bosons in an $SU(N+1) \\to SU(N) \\times U(1)$ theory. In each case,\nwe describe the behaviour of the strings and examine the relation between the\nenergy and the angular momentum of the bound state.",
        "category": "hep"
    },
    {
        "text": "A new analysis of the MiniBooNE low-energy excess: We present the results of a new analysis of the data of the MiniBooNE\nexperiment taking into account the additional background of photons from\n$\\Delta^{+/0}$ decay proposed in arXiv:1909.08571 and additional contributions\ndue to coherent photon emission, incoherent production of higher mass\nresonances, and incoherent non-resonant nucleon production. We show that the\nnew background can explain part of the MiniBooNE low-energy excess and the\nstatistical significance of the MiniBooNE indication in favor of short-baseline\nneutrino oscillation decreases from $5.1\\sigma$ to $3.6\\sigma$. We also\nconsider the implications for short-baseline neutrino oscillations in the 3+1\nactive-sterile neutrino mixing framework. We show that the new analysis of the\nMiniBooNE data indicates smaller active-sterile neutrino mixing and may lead us\ntowards a solution of the appearance-disappearance tension in the global fit of\nshort-baseline neutrino oscillation data.",
        "category": "hep"
    },
    {
        "text": "New Fits for the Non-Perturbative Parameters in the CSS Resummation\n  Formalism: We update the non-perturbative function of the Collins-Soper- Sterman\nresummation formalism in hadron collisions. Two functional forms in impact\nparameter space are considered, one with a pure Gaussian form with two\nparameters and the other with an additional linear term. The results for the\ntwo parameter fit are found to be g1=0.24+0.08-0.07 GeV^2, g2=0.34+0.07-0.08\nGeV^2. The results for the three parameter fit are g1=0.15+004-0.03 GeV^2,\ng2=0.48+0.07-0.05 GeV^2, and g3=-0.58+0.26-0.20 GeV^-1. We discuss the\npotential for the full Tevatron Run I Z boson data for further testing of the\nuniversality of the non-perturbative function.",
        "category": "hep"
    },
    {
        "text": "Green Function Simulation of Hamiltonian Lattice Models with Stochastic\n  Reconfiguration: We apply a recently proposed Green Function Monte Carlo to the study of\nHamiltonian lattice gauge theories. This class of algorithms computes quantum\nvacuum expectation values by averaging over a set of suitable weighted random\nwalkers. By means of a procedure called Stochastic Reconfiguration the long\nstanding problem of keeping fixed the walker population without a priori\nknowledge on the ground state is completely solved. In the $U(1)_2$ model,\nwhich we choose as our theoretical laboratory, we evaluate the mean plaquette\nand the vacuum energy per plaquette. We find good agreement with previous works\nusing model dependent guiding functions for the random walkers.",
        "category": "hep"
    },
    {
        "text": "Integral Coefficients for One-Loop Amplitudes: We present a set of algebraic functions for evaluating the coefficients of\nthe scalar integral basis of a general one-loop amplitude. The functions are\nderived from unitarity cuts, but the complete cut-integral procedure has been\ncarried out in generality so that it never needs to be repeated. Where the\nmaster integrals are known explicitly, the results here can be used as a black\nbox with tree-level amplitudes as input and one-loop amplitudes as output.",
        "category": "hep"
    },
    {
        "text": "Quarkonium propagation in the quark gluon plasma: In relativistic heavy ion collisions at RHIC and the LHC, a quark gluon\nplasma (QGP) is created for a short duration of about 10fm/c. Quarkonia (bound\nstates of $c\\bar{c}$ and $b\\bar{b}$) are sensitive probes of this phase on\nlength scales comparable to the size of the bound states which are less than\n1fm. Observations of quarkonia in these collisions provide us with a lot of\ninformation about how the presence of a QGP affects various quarkonium states.\nThis has motivated the development of the theory of heavy quarks and their\nbound states in a thermal medium, and its application to the phenomenology of\nquarkonia in heavy ion collisions. We review some of these developments here.",
        "category": "hep"
    },
    {
        "text": "Asymptotics of Elliptic Genera of Symmetric Products and Dyonic Black\n  Hole Degeneracy: We calculate asymptotic expansions of elliptic genera for a supersymmetric\nsigma model on the N - fold symmetric product S^NM of a Kahler manifold M and\nfor N = 2 superconformal field theory. Asymptotic expansions for the degeneracy\nof dyonic black hole spectrum are also derived.",
        "category": "hep"
    },
    {
        "text": "Update of the solar neutrino oscillation analysis with the 766 Ty\n  KamLAND spectrum: We investigate the impact of the 766.3 Ty KamLAND spectrum data on the\ndetermination of the solar neutrino oscillation parameters. We show that the\nobserved spectrum distortion in the KamLAND experiment firmly establishes\n$\\Delta m^2_{21}$ to lie in the low-LMA solution region. The high-LMA solution\nis excluded at more than 4$\\sigma$ by the global solar neutrino and KamLAND\nspectrum data. The maximal solar neutrino mixing is ruled out at $6\\sigma$\nlevel. The $3\\sigma$ allowed region in the $\\Delta m^2_{21}-\\sin^2\\theta_{12}$\nplane is found to be remarkably stable with respect to leaving out the data\nfrom one of the solar neutrino experiments from the global analysis. We perform\na three flavor neutrino oscillation analysis of the global solar neutrino and\nKamLAND spectrum data as well. The $3\\sigma$ upper limit on $\\sin^2\\theta_{13}$\nis found to be $ \\sin^2\\theta_{13} <0.055$. We derive predictions for the CC to\nNC event rate ratio and day-night (D-N) asymmetry in the CC event rate,\nmeasured in the SNO experiment, and for the suppression of the event rate in\nthe BOREXINO and LowNu experiments. Prospective high precision measurements of\nthe solar neutrino oscillation parameters are also discussed.",
        "category": "hep"
    },
    {
        "text": "SMEFT is falsifiable through multi-Higgs measurements (even in the\n  absence of new light particles): From the embedding of the Standard Model Effective Field Theory (SMEFT) in\nthe more general Higgs Effective Field Theory (HEFT), we expose correlations\namong the coefficients of the latter that, if found to be violated in future\ndata, would lead to the experimental falsification of the SMEFT framework.\nThese are derived from the necessary symmetric point of HEFT and analyticity of\nthe SMEFT Lagrangian that allows the construction of the SMEFT expansion, as\nlaid out by other groups, and properties at that point of the Higgs-flare\nfunction $\\mathcal{F}(h)$ coupling Goldstone and Higgs bosons, of the Higgs\npotential $V(h)$ and of the Higgs-top quark coupling function $\\mathcal{G}(h)$.",
        "category": "hep"
    },
    {
        "text": "FCNC in the 3-3-1 model with right-handed neutrinos: Flavor changing neutral currents coming from a new non-universal neutral\nGauge-Boson and from the non-unitary quark mixing matrix for the\n$SU(3)_c\\otimes SU(3)_L\\otimes U(1)_X$ model with right handed neutrinos are\nstudied. By imposing as experimental constraints the measured values of the 3x3\nquark mixing matrix, the neutral meson mixing, and the bounds measured values\nfor direct flavor changing neutral current processes, the largest mixing of the\nknown quarks with the exotic ones can be established, with new sources of\nflavor changing neutral currents being identified. Our main result is that for\na $|V_{tb}|$ value smaller than one, large rates of rare top decays such as\n$t\\to c\\gamma$, $t\\to cZ$, and $t\\to cg$ (where g stands for the gluon field)\nare obtained; but if $|V_{tb}|\\approx 1$ the model can survive present\nexperimental limits only if the mass of the new neutral Gauge Boson becomes\nlarger that 10 TeV.",
        "category": "hep"
    },
    {
        "text": "Gluon Digitization via Character Expansion for Quantum Computers: Efficient digitization is required for quantum simulations of gauge theories.\nSchemes based on discrete subgroups use a smaller, fixed number of qubits at\nthe cost of systematic errors. We systematize this approach by deriving the\nsingle plaquette action through matching the continuous group action to that of\na discrete one via group character expansions modulo the field fluctuation\ncontributions. We accompany this scheme by simulations of pure gauge over the\nlargest discrete crystal-like subgroup of $SU(3)$ up to the fifth-order in the\ncoupling constant.",
        "category": "hep"
    },
    {
        "text": "Born-Infeld Gravity Revisited: In this paper we investigate the behavior of linearized gravitational\nexcitation in the Born-Infeld Gravity in $AdS_3$ space. We obtain the\nlinearized equation of motion and show that this higher order gravity propagate\ntwo gravitons, massless and massive, on the $AdS_3$ background. In contrast to\nthe $R^2$ models, such as TMG or NMG, Born-Infeld Gravity does not have a\ncritical point for any regular choice of parameters. So the logarithmic\nsolution is not a solution of this model, due to this one can not find a\nlogarithmic conformal field theory as a dual model for Born-Infeld Gravity.",
        "category": "hep"
    },
    {
        "text": "The statistical model for parton distributions: The phenomenological motivations, the expressions and the comparison with\nexperiment of the parton distributions inspired by the quantum statistics are\ndescribed. The Fermi-Dirac expressions for the quarks and their antiparticles\nautomatically account for the correlation between the shape and the first\nmoments of the valence partons, as well as the flavor and spin asymmetries of\nthe sea. One is able to describe with a small number of parameters both\nunpolarized and polarized structure functions.",
        "category": "hep"
    },
    {
        "text": "The Static Quark-Antiquark Potential: A ``Classical'' Experiment On The\n  Connection Machine CM-2: We describe the Wuppertal university pilot project in applied parallel\ncomputing. We report on a comprehensive high statistics determination of the\nstatic quark-antiquark potential and related quantities from quenched quantum\nchromodynamics. New data for the string tension and the plaquette action for\nthe region 5.5 < beta < 6.8 is presented.",
        "category": "hep"
    },
    {
        "text": "A power-law description of heavy ion collision centrality: The minimum-bias distribution on heavy ion collision multiplicity $n_{ch}$ is\nwell approximated by power-law form $n_{ch}^{-3/4}$, suggesting that a change\nof variable to $n_{ch}^{1/4}$ may provide more precise access to the structure\nof the distribution and to A-A collision centrality. We present a detailed\ncentrality study of Hijing-1.37 Monte Carlo data at 200 GeV using the power-law\nformat. We find that the minimum-bias distribution on $n_{participant}^{1/4}$,\ndetermined with a Glauber Monte Carlo simulation, is uniform except for a 5%\nsinusoidal variation. The power-law format reveals precise linear relations\nbetween Glauber parameters $n_{part}$ and $n_{bin}$ and the fractional cross\nsection. The power-law format applied to RHIC data facilitates incorporation of\nextrapolation constraints on data and Glauber distributions to obtain a\nten-fold improvement in centrality accuracy for peripheral collisions.",
        "category": "hep"
    },
    {
        "text": "Four-point Functions of Lowest Weight CPOs in N=4 SYM_4 in Supergravity\n  Approximation: We show that the recently found quartic action for the scalars from the\nmassless graviton multiplet of type IIB supergravity compactified on\nAdS_5\\times S^5 background coincides with the relevant part of the action of\nthe gauged N=8 5d supergravity on AdS_5. We then use this action to compute the\n4-point function of the lowest weight chiral primary operators\n$\\tr(\\phi^{(i}\\phi^{j)})$ in N=4 SYM_4 at large $N$ and at strong `t Hooft\ncoupling.",
        "category": "hep"
    },
    {
        "text": "Charm meson resonances and D to V semileptonic form factors: Using limits of large energy effective theory and heavy quark effective\ntheory we propose a simple parametrization of the heavy to light H to V\nsemileptonic form factors. Then we reconsider D to V l nu_l decays within a\nmodel which combines heavy meson and chiral symmetry. In our Lagrangians we\ninclude contributions coming from excited charm meson states, some of them\nrecently observed. Within this framework we determine all parameters describing\nthe shapes of the form factors and calculate branching ratios and helicity\nratios for all D to V l nu_l decays.",
        "category": "hep"
    },
    {
        "text": "Strange meson form factors in holographic QCD: We consider the electromagnetic form factors of strange vector, axial vector\nand pseudoscalar mesons in a holographic QCD model. We find the charge radius\nof charged kaon agrees with the experiment, while the charge radius of charged\npion is a little bit smaller than the experimental value, as obtained in other\ncalculations in the hard-wall holographic QCD models. The charge radii of\ncharged rho and $K^\\ast$ quantitatively agree with a recent Dyson-Schwinger\nequation calculation. We also present the electric form factors of vector,\naxial vector and pseudoscalar mesons in both space-like and time-like regions.\nWe find the charged kaon form factor is in agreement with the experiment data.",
        "category": "hep"
    },
    {
        "text": "Dark Matter spikes around Sgr A* in $\u03b3$-rays: We use H.E.S.S. $\\gamma$-ray observations of Sgr A* to derive novel limits on\nthe Dark Matter (DM) annihilation cross-section. We quantify their dependence\non uncertainties i) in the DM halo profile, which we vary from peaked to cored,\nand ii) in the shape of the DM spike around Sgr A*, dynamically heated by the\nnuclear star cluster. For peaked halo profiles and depending on the heating of\nthe spike, our limits are the strongest existing ones for DM masses above a few\nTeV. Our study contributes to assessing the influence of the advancements in\nour knowledge of the Milky Way on determining the properties of DM particles.",
        "category": "hep"
    },
    {
        "text": "Dilaton Effective Action with $\\mathcal{N}=1$ Supersymmetry: We clarify the structure of the four-dimensional low-energy effective action\nthat encodes the conformal and $U(1)$ R-symmetry anomalies in an\n$\\mathcal{N}=1$ supersymmetric field theory. The action depends on the dilaton,\n$\\tau$, associated with broken conformal symmetry, and the Goldstone mode,\n$\\beta$, of the broken $U(1)$ R-symmetry. We present the action for general\ncurved spacetime and background gauge field up to and including all possible\nfour-derivative terms. The result, constructed from basic principles, extends\nand clarifies the structure found by Schwimmer and Theisen in arXiv:1011.0696\nusing superfield methods. We show that the Goldstone mode $\\beta$ does not\ninterfere with the proof of the four-dimensional $a$-theorem based on $2 \\to 2$\ndilaton scattering. In fact, supersymmetry Ward identities ensure that a proof\nof the $a$-theorem can also be based on $2 \\to 2$ Goldstone mode scattering\nwhen the low-energy theory preserves $\\mathcal{N}=1$ supersymmetry. We find\nthat even without supersymmetry, a Goldstone mode for any broken global $U(1)$\nsymmetry cannot interfere with the proof of the four-dimensional $a$-theorem.",
        "category": "hep"
    },
    {
        "text": "X-ray Lines from Dark Matter: The Good, The Bad, and The Unlikely: We consider three classes of dark matter (DM) models to account for the\nrecently observed 3.5 keV line: metastable excited state DM, annihilating DM,\nand decaying DM. We study two examples of metastable excited state DM. The\nfirst, millicharged composite DM, has both inelasticity and photon emission\nbuilt in, but with a very constrained parameter space. In the second example,\nup-scattering and decay come from separate sectors and is thus less\nconstrained. The decay of the excited state can potentially be detectable at\ndirect detection experiments. However we find that CMB constraints are at the\nborder of excluding this as an interpretation of the DAMA signal. The\nannihilating DM interpretation of the X-ray line is found to be in tension with\nCMB constraints. Lastly, a generalized version of decaying DM can account for\nthe data with a lifetime exceeding the age of the Universe for masses $\\lesssim\n10^{6}$ GeV.",
        "category": "hep"
    },
    {
        "text": "On the Geometry of Moduli Space of Vacua in N=2 Supersymmetric\n  Yang-Mills Theory: We consider generic properties of the moduli space of vacua in $N=2$\nsupersymmetric Yang--Mills theory recently studied by Seiberg and Witten. We\nfind, on general grounds, Picard--Fuchs type of differential equations\nexpressing the existence of a flat holomorphic connection, which for one\nparameter (i.e. for gauge group $G=SU(2)$), are second order equations. In the\ncase of coupling to gravity (as in string theory), where also ``gravitational''\nelectric and magnetic monopoles are present, the electric--magnetic S duality,\ndue to quantum corrections, does not seem any longer to be related to\n$Sl(2,\\mathbb{Z})$ as for $N=4$ supersymmetric theory.",
        "category": "hep"
    },
    {
        "text": "The Stochastic Axion Scenario: For the minimal QCD axion model it is generally believed that overproduction\nof dark matter constrains the axion mass to be above a certain threshold, or at\nleast that the initial misalignment angle must be tuned if the mass is below\nthat threshold. We demonstrate that this is incorrect. During inflation, if the\nHubble scale is low, the axion tends toward an equilibrium. This means the\nminimal QCD axion can naturally give the observed dark matter abundance in the\nentire lower part of the mass range, down to masses $\\sim 10^{-12}$ eV (or\n$f_a$ up to almost the Planck scale). The axion abundance is generated by\nquantum fluctuations of the field during inflation. This mechanism generates\ncold dark matter with negligible isocurvature perturbations. In addition to the\nQCD axion, this mechanism can also generate a cosmological abundance of\naxion-like particles and other light fields.",
        "category": "hep"
    },
    {
        "text": "Rigid Supersymmetric Backgrounds of 3-dimensional Newton-Cartan\n  Supergravity: Recently, a non-relativistic off-shell formulation of three dimensional\nNewton-Cartan supergravity was proposed as the $c \\rightarrow \\infty$ limit of\nthree dimensional $\\mathcal{N}=2$ supergravity in arXiv:1505.02095. In the\npresent paper we study supersymmetric backgrounds within this theory. Using\nintegrability constraints for the non-relativistic Killing spinor equations, we\nexplicitly construct all maximally supersymmetric solutions, which admit four\nsupercharges. In addition to these solutions, there are $\\frac{1}{2}$-BPS\nsolutions with reduced supersymmetry. We give explicit examples of such\nbackgrounds and derive necessary conditions for backgrounds preserving two\nsupercharges. Finally, we address how supersymmetric backgrounds of\n$\\mathcal{N}=2$ supergravity are connected to the solutions found here in the\n$c \\rightarrow \\infty$ limit.",
        "category": "hep"
    },
    {
        "text": "News from polarized e- and e+ at the ILC: The proposed International Linear Collider (ILC) is well-suited for\ndiscovering physics beyond the Standard Model and for precisely unravelling the\nstructure of the underlying physics. The physics return of the ILC can be\nmaximized by the use of polarized beams, in particular the simultaneous\npolarization of the e- and the e+ beam. Ongoing physics studies are accompanied\nby active R&D on the machine part for generating polarized beams and for\nmeasuring the polarization with high precision at the ILC. Some new results on\nthe physics case and on the technical aspects of the polarization of both beams\nare briefly summarized.",
        "category": "hep"
    },
    {
        "text": "The crystallography of color superconductivity: We describe the crystalline phase of color superconducting quark matter. This\nphase may occur in quark matter at densities relevant for compact star physics,\nwith possible implications for glitch phenomena in pulsars. We use a\nGinzburg-Landau approach to determine that the crystal has a\nface-centered-cubic (FCC) structure. Moreover, our results indicate that the\nphase is robust, with gaps, critical temperature, and free energy comparable to\nthose of the color-flavor-locked (CFL) phase. Our calculations also predict\n``crystalline superfluidity'' in ultracold gases of fermionic atoms.",
        "category": "hep"
    },
    {
        "text": "Lepton Masses and Mixing in a Left-Right Symmetric Model with a\n  TeV-scale Gravity: We construct a left-right symmetric (LRS) model in five dimensions which\naccounts naturally for the lepton flavor parameters. The fifth dimension is\ndescribed by an orbifold, S_1/Z_2 times Z'_2, with a typical size of order\nTeV^{-1}. The fundamental scale is of order 25 TeV which implies that the gauge\nhierarchy problem is ameliorated. In addition the LRS breaking scale is of\norder few TeV which implies that interactions beyond those of the standard\nmodel are accessible to near future experiments. Leptons of different\nrepresentations are localized around different orbifold fixed points. This\nexplains, through the Arkani-Hamed-Schmaltz mechanism, the smallness of the tau\nmass compared to the electroweak breaking scale. An additional U(1) horizontal\nsymmetry, broken by small parameters, yields the hierarchy in the charged\nlepton masses, strong suppression of the light neutrino masses and accounts for\nthe mixing parameters. The model yields several unique predictions. In\nparticular, the branching ratio for the lepton flavor violating process mu^-\n--> e^+ e^- e^- is comparable with its present experimental sensitivity.",
        "category": "hep"
    },
    {
        "text": "Nonlinear SUSY General Relativity Theory and Significances: We show some consequences of the nonlinear supersymmetric general relativity\n(NLSUSYGR) theory on particle physics, cosmology and their relations. They may\ngive new insights into the SUSY breaking mechanism, dark energy, dark matter\nand the low enegy superpartner particles which are compatible with the recent\nLHC data.",
        "category": "hep"
    },
    {
        "text": "Quantum Anomaly in Molecular Physics: The interaction of an electron with a polar molecule is shown to be the\nsimplest realization of a quantum anomaly in a physical system. The existence\nof a critical dipole moment for electron capture and formation of anions, which\nhas been confirmed experimentally and numerically, is derived. This phenomenon\nis a manifestation of the anomaly associated with quantum symmetry breaking of\nthe classical scale invariance exhibited by the point-dipole interaction.\nFinally, analysis of symmetry breaking for this system is implemented within\ntwo different models: point dipole subject to an anomaly and finite dipole\nsubject to explicit symmetry breaking.",
        "category": "hep"
    },
    {
        "text": "U_A(1) Anomaly in Hot and Dense QCD and the Critical Surface: We discuss the chiral phase transition in hot and dense QCD with three light\nflavors. Inspired by the well known fact that the U_A(1) anomaly could induce\nfirst order phase transitions, we study the effect of the possible restoration\nof the U_A(1) symmetry at finite density. In particular, we explore the link\nbetween the U_A(1) restoration and the recent lattice QCD results of de\nForcrand and Philipsen, in which the first order phase transition region near\nzero chemical potential (mu) shrinks in the quark mass and mu space when mu is\nincreased. Starting from the Ginzburg-Landau theory for general discussions, we\nthen use the Nambu--Jona-Lasinio model for quantitative studies. With the\npartial U_A(1) restoration modeled by the density dependent 't Hooft\ninteraction, we fit the shrinking of the critical surface found in de Forcrand\nand Philipsen's lattice calculation at low mu. At higher mu, the critical\nsurface might shrink or expand, depending on the scenarios. This raises the\npossibility that despite the shrinking of the critical surface at lower mu, the\nQCD critical end point might still exist due to the expansion at higher mu. In\nthis case, very high precision lattice data will be needed to detect the\nback-bending of the critical surface with the currently available analytic\ncontinuation or Taylor expansion approaches. Lattice computations could,\nhowever, test whether the U_A(1) restoration is responsible for the shrinking\nof the critical surface by computing eta' mass or the topological\nsusceptibility at small mu.",
        "category": "hep"
    },
    {
        "text": "Effective actions on squashed lens spaces: As a technical exercise with possible relevance to the holographic principle\nand string theory, the effective actions (functional determinants) for scalars\nand spinors on the squashed three-sphere identified under the action of a\ncyclic group, Z_m, are determined. Especially in the extreme oblate squashing\nlimit, which has a thermodynamic interpretation, the high temperature behaviour\nis found as a function of m. Although the intermediate details for odd and even\nm are different, the final answers are the same. A thermodynamic interpretation\nfor spinors is possible only for twisted periodicity conditions and m even.",
        "category": "hep"
    },
    {
        "text": "Holographic Wilson Loops, Dielectric Interfaces, and Topological\n  Insulators: We use holography to study (3+1)-dimensional N=4 supersymmetric SU(Nc)\nYang-Mills theory (SYM) in the large-Nc and large coupling limits, with a\n(2+1)-dimensional interface where the Yang-Mills coupling or theta-angle\nchanges value, or \"jumps.\" We consider interfaces that either break all\nsupersymmetry or that preserve half of the N=4 supersymmetry thanks to certain\noperators localized to the interface. Specifically, we compute the expectation\nvalues of a straight timelike Wilson line and of a rectangular Wilson loop in\nthe fundamental representation of SU(Nc). The former gives us the self-energy\nof a heavy test charge while the latter gives us the potential between heavy\ntest charges. A jumping coupling or theta-angle acts much like a dielectric\ninterface in electromagnetism: a self-energy or potential includes the effects\nof image charges. N=4 SYM with a jumping theta-angle may also be interpreted as\nthe low-energy effective description of a fractional topological insulator, as\nwe explain in detail. For non-supersymmetric interfaces, we find that the\nself-energy and potential are qualitatively similar to those in\nelectromagnetism, despite the differences between N=4 SYM and electromagnetism.\nFor supersymmetric interfaces, we find dramatic differences from\nelectromagnetism which depend sensitively on the coupling of the test charge to\nthe adjoint scalars of N=4 SYM. In particular, we find one special case where a\ntest charge has vanishing image charge.",
        "category": "hep"
    },
    {
        "text": "D1 and D5-brane giant gravitons on $AdS_3 \\times S^3 \\times S^3 \\times\n  S^1$: We construct various examples of 1/4-BPS giant gravitons embedded into the\ntype IIB supergravity background $AdS_{3} \\times S^{3}_{+} \\times S^{3}_{-}\n\\times S^{1}$ with pure R-R flux: two D1-brane giants wrapping 1-cycles in\n$AdS_{3}$ and $S^{3}_{+} \\times S^{3}_{-}$, and one D5-brane giant wrapping a\n4-cycle in $S^{3}_{+} \\times S^{3}_{-}$ and the $S^{1}$. These D-branes are\nsupported by angular momenta $\\alpha$ P on one 3-sphere and $(1-\\alpha)$ P on\nthe other. We then construct a general class of 1/8-BPS D5-brane giant\ngravitons wrapping 4-cycles $\\Sigma$ in $S^{3}_{+} \\times S^{3}_{-}$ and the\n$S^{1}$. Here $\\Sigma$ is the intersection of a holomorphic surface\n$\\mathcal{C}$ in $\\mathbb{C}^{2}_{+} \\times \\mathbb{C}^{2}_{-}$ with the\n$S^{3}_{+} \\times S^{3}_{-}$ submanifold. The holomorphic surface $\\mathcal{C}$\nis defined by $f(y_{1}z_{1},y_{1}z_{2},y_{2}z_{1},y_{2}z_{2}) = 0$, with\n$y_{a}$ and $z_{a}$ the $\\mathbb{C}^{2}_{\\pm}$ complex coordinates. There is\nsupersymmetry enhancement to 1/4-BPS in the special case $f(y_{1}z_{1}) = 0$ of\nwhich our original D5-brane giant graviton is an example.",
        "category": "hep"
    },
    {
        "text": "Modular invariance and entanglement entropy: We study the Renyi and entanglement entropies for free 2d CFT's at finite\ntemperature and finite size, with emphasis on their properties under modular\ntransformations of the torus. We address the issue of summing over fermion spin\nstructures in the replica trick, and show that the relation between\nentanglement and thermal entropy determines two different ways to perform this\nsum in the limits of small and large interval. Both answers are modular\ncovariant, rather than invariant. Our results are compared with those for a\nfree boson at unit radius in the two limits and complete agreement is found,\nsupporting the view that entanglement respects Bose-Fermi duality. We extend\nour computations to multiple free Dirac fermions having correlated spin\nstructures, dual to free bosons on the Spin(2d) weight lattice.",
        "category": "hep"
    },
    {
        "text": "Local charge conservation law as a source of gauge condition in quantum\n  electrodynamics: A formulation of quantum electrodynamics is proposed, in which the local law\nof conservation of electric charge serves as the source of the gauge condition.\nThe equations of motion of the gauge variable and the density of the charge\ndistribution in space following from this law are introduced into the quantum\ntheory as additional conditions. Along with fixing the gauge, the interaction\nof charges in the modified quantum theory is described by the dynamics of the\ncharge distribution density. The asymptotic states of free particles at spatial\ninfinity are replaced by the initial and final states of the electromagnetic\nsystem in the form of charged wave packets.",
        "category": "hep"
    },
    {
        "text": "Multigluon amplitudes, ${\\cal N}=4$ constraints and the WZW model: Classical ${\\cal N}=4$ Yang-Mills theory is defined by the superspace\nconstraints. We obtain a solution of a subset of these constraints and show\nthat it leads to the maximally helicity violating (MHV) amplitudes. The action\nwhich leads to the solvable part of the constraints is a Wess-Zumino-Witten\n(WZW) action on a suitably extended superspace. The non-MHV tree amplitudes can\nalso be expressed in terms of this action.",
        "category": "hep"
    },
    {
        "text": "Radiative Decays of Charged Leptons in the Seesaw Effective Field Theory\n  with One-loop Matching: The canonical type-I seesaw model with three heavy Majorana neutrinos is one\nof the most natural extensions of the standard model (SM) to accommodate tiny\nMajorana masses of three ordinary neutrinos. At low-energy scales, Majorana\nneutrino masses and unitarity violation of lepton flavor mixing have been\nextensively discussed in the literature, which are respectively generated by\nthe unique dimension-five Weinberg operator and one dimension-six operator in\nthe seesaw effective field theory (SEFT) with the tree-level matching. In this\nwork, we clarify that a self-consistent calculation of radiative decays of\ncharged leptons $\\beta^- \\to \\alpha^- + \\gamma$ requires the SEFT with one-loop\nmatching, where new six-dimensional operators emerge and make important\ncontributions. For the first time, the Wilson coefficients of all the relevant\nsix-dimensional operators are computed by carrying out the one-loop matching\nbetween the effective theory and full seesaw model, and applied to calculate\nthe total rates of radiative decays of charged leptons.",
        "category": "hep"
    },
    {
        "text": "Is the up-quark massless?: We report on determinations of the low-energy constants alpha5 and alpha8 in\nthe effective chiral Lagrangian at O(p^4), using lattice simulations with N_f=2\nflavours of dynamical quarks. Precise knowledge of these constants is required\nto test the hypothesis whether or not the up-quark is massless. Our results are\nobtained by studying the quark mass dependence of suitably defined ratios of\npseudoscalar meson masses and matrix elements. Although comparisons with an\nearlier study in the quenched approximation reveal small qualitative\ndifferences in the quark mass behaviour, numerical estimates for alpha5 and\nalpha8 show only a weak dependence on the number of dynamical quark flavours.\nOur results disfavour the possibility of a massless up-quark, provided that the\nquark mass dependence in the physical three-flavour case is not fundamentally\ndifferent from the two-flavour case studied here.",
        "category": "hep"
    },
    {
        "text": "Stable Sexaquark: It is proposed that the neutral, B=2, flavor singlet sexaquark (S) composed\nof uuddss quarks, has mass m_S <~ 2 GeV. If m_S < 2 (m_p + m_e), it is\nabsolutely stable, while for m_S < m_p+m_e + m_Lambda, its lifetime can be\ngreater than the age of the Universe. Lattice gauge theory cannot yet predict\nm_S, but indirect evidence supports the hypothesis of stability. A stable S is\nconsistent with QCD theory and would have eluded detection in accelerator and\nnon-accelerator experiments. If it exists, the S is a good Dark Matter\ncandidate. Analyses of existing Upsilon decay and LHC data can be used to\ndiscover it and measure its mass.",
        "category": "hep"
    },
    {
        "text": "Brane-Worlds and the Calabi-Yau Complex Structure Moduli: In this paper we extend previous work on the relation between the complex\nstructure moduli of the underlying Calabi-Yau manifold in five dimensional\nsupergravity with the time evolution of an embedded 3-brane. We numerically\nsolve the fields' equations for such a construction and focus on dust and\nradiation filled branes; with the possible application of modeling the universe\nas a brane-world. It is shown that in both cases the time evolution of the\nmoduli causally connects to the expansion of the brane-world. We also find that\nin most cases considered there is an early short period of rapid accelerative\nexpansion, indicating an inflationary epoch. We report on these results;\nleaving analysis of the underlying causes for future work.",
        "category": "hep"
    },
    {
        "text": "Spinless Salpeter Equation: Laguerre Bounds on Energy Levels: The spinless Salpeter equation may be considered either as a standard\napproximation to the Bethe--Salpeter formalism, designed for the description of\nbound states within a relativistic quantum field theory, or as the most simple,\nto a certain extent relativistic generalization of the costumary\nnonrelativistic Schr\\\"odinger formalism. Because of the presence of the rather\ndifficult-to-handle square-root operator of the relativistic kinetic energy in\nthe corresponding Hamiltonian, very frequently the corresponding (discrete)\nspectrum of energy eigenvalues cannot be determined analytically. Therefore, we\nshow how to calculate, by some clever choice of basis vectors in the Hilbert\nspace of solutions, for the rather large class of power-law potentials, at\nleast (sometimes excellent!) upper bounds on these energy eigenvalues, for the\nlowest-lying levels this even analytically.",
        "category": "hep"
    },
    {
        "text": "Pion production in neutrino-nucleus collisions: We compare our pion production results with recent MiniBooNE data measured in\nmineral oil. Our total cross sections lie below experimental data for neutrino\nenergies above 1 GeV. Differential cross sections show our model produces too\nfew high energy pions in the forward direction as compared to data. The\nagreement with experiment improves by artificially removing pion final state\ninteraction.",
        "category": "hep"
    },
    {
        "text": "Neutrino mass with large $SU(2)_L$ multiplet fields: We propose an extension of the standard model introducing large $SU(2)_L$\nmultiplet fields which are quartet and septet scalars and quintet Majorana\nfermions. These multiplets can induce the neutrino masses via interactions with\nthe $SU(2)$ doublet leptons. We then find the neutrino masses are suppressed by\nsmall vacuum expectation value of the quartet/septet and an inverse of quintet\nfermion mass relaxing the Yukawa hierarchies among the standard model fermions.\nWe also discuss collider physics at the Large Hadron Collider considering\nproduction of charged particles in these multiplets, and due to effects of\nviolating custodial symmetry, some specific signatures can be found. Then we\ndiscuss the detectability of these signals.",
        "category": "hep"
    },
    {
        "text": "First observation of the decay $B_s^0 \\rightarrow \u03c6\\bar{K}^{*0}$: The first observation of the decay $B_s^0 \\rightarrow \\phi \\bar{K}^{*0}$ is\nreported. The analysis is based on a data sample corresponding to an integrated\nluminosity of 1.0 fb$^{-1}$ of $pp$ collisions at $\\sqrt{s} = 7 TeV$, collected\nwith the LHCb detector. A yield of $30 \\pm 6$ $B_s^0 \\rightarrow\n(K^+K^-)(K^-\\pi^+)$ decays is found in the mass windows $1012.5 < M(K^+K^-) <\n1026.5 MeV/c^2$ and $746 < M(K^-\\pi^+)< 1046 MeV/c^2$. The signal yield is\nfound to be dominated by $B_s^0 \\rightarrow \\phi \\bar{K}^{*0}$ decays, and the\ncorresponding branching fraction is measured to be ${\\cal B}(B_s^0 \\rightarrow\n\\phi \\bar{K}^{*0}) = (1.10 \\pm 0.24 (stat) \\pm 0.14 (syst) \\pm 0.08 (f_d/f_s))\n\\times 10^{-6}$, where the uncertainties are statistical, systematic and from\nthe ratio of fragmentation fractions $f_d/f_s$ which accounts for the different\nproduction rate of $B^0$ and $B_s^0$ mesons. The significance of $B_s^0\n\\rightarrow \\phi \\bar{K}^{*0}$ signal is 6.1 standard deviations. The fraction\nof longitudinal polarization in $B_s^0 \\rightarrow \\phi \\bar{K}^{*0}$ decays is\nfound to be $f_0 = 0.51 \\pm 0.15 (stat) \\pm 0.07 (syst)$.",
        "category": "hep"
    },
    {
        "text": "Superconformal Calogero models as a gauged matrix mechanics: We present basics of the gauged superfield approach to constructing\nN-superconformal multi-particle Calogero-type systems developed in\narXiv:0812.4276, arXiv:0905.4951 and arXiv:0912.3508. This approach is\nillustrated by the multi-particle systems possessing SU(1,1|1) and\nD(2,1;\\alpha) supersymmetries, as well as by the model of new N=4\nsuperconformal quantum mechanics.",
        "category": "hep"
    },
    {
        "text": "$R$-Parity Breaking Phenomenology: We review various features of the $R$-parity breaking phenomenology, with\nparticular attention to the low energy observables, and to the patterns of the\n$R$-parity breaking interactions that arise in Grand Unified models.",
        "category": "hep"
    },
    {
        "text": "Small Flux Superpotentials for Type IIB Flux Vacua Close to a Conifold: We generalize the recently proposed mechanism by Demirtas, Kim, McAllister\nand Moritz arXiv:1912.10047 for the explicit construction of type IIB flux\nvacua with $|W_0|\\ll 1$ to the region close to the conifold locus in the\ncomplex structure moduli space. For that purpose tools are developed to\ndetermine the periods and the resulting prepotential close to such a\ncodimension one locus with all the remaining moduli still in the large complex\nstructure regime. As a proof of principle we present a working example for the\nCalabi-Yau manifold $\\mathbb{P}_{1,1,2,8,12}[24]$.",
        "category": "hep"
    },
    {
        "text": "The quenched generating functional for hadronic weak interactions: The ultraviolet behaviour of the generating functional for hadronic weak\ninteractions with $|\\Delta S| =1, 2$ is investigated to one loop for a generic\nnumber of flavours and in the quenched approximation. New quenched chiral\nlogarithms generated by the weak interactions can be accounted for via a\nredefinition of the weak mass term in the $\\Delta S=\\pm 1$ weak effective\nLagrangian at leading order. Finally, we illustrate how chiral logarithms are\nmodified by the quenched approximation in $K\\to\\pi\\pi$ matrix elements with\n$\\Delta I=1/2$ and 3/2.",
        "category": "hep"
    },
    {
        "text": "$J/\u03c8$ -nucleon scattering in $P_{c}^{+}$ pentaquarks channel: Two pentaquarks $P_{c}^{+}$ were discovered by LHCb collaboration as peaks in\nthe proton-$J/\\psi$ invariant mass. We perform the lattice QCD study of the\nscattering between $J/\\psi$ meson and nucleon in the channels with\n$J^{P}=\\frac{3}{2}^{+},\\frac{3}{2}^{-}, \\frac{5}{2}^{+}, \\frac{5}{2}^{-}$,\nwhere $P_{c}^{+}$ was discovered. This is the first lattice simulation that\nreaches the energies $4.3-4.5~$GeV where pentaquarks reside. The higher partial\nwaves $L>0$ are also explored for the first time. In this study we consider the\nsingle-channel approximation for scattering of $NJ/\\psi$. Energies and\neigenstates are extracted for the $NJ/\\psi$ system at the zero total momentum\nfor all six irreducible representations of the lattice irreducible\nrepresentation. No significant energy shifts are observed. The number of\neigenstates agrees with the number expected from non-interacting limit for\nscattering. This could possibly indicate that the $P_{c}$ resonances seen in\nexperiment are a consequence of a coupling of the $NJ/\\psi$ channel with other\ntwo-hadron channels.",
        "category": "hep"
    },
    {
        "text": "Determination of $c_\\mathrm A$ in three-flavour lattice QCD with Wilson\n  fermions and tree-level improved gauge action: We report on an ongoing non-perturbative determination of the improvement\ncoefficient of the axial current, $c_\\mathrm A$, with three flavours of\ndynamical $\\mathrm O(a)$ improved Wilson quarks and tree-level Symanzik\nimproved gauge action. Our computations are based on simulations with the\nopenQCD code. The improvement condition for a range of couplings is formulated\nwith Schr\\\"odinger functional boundary conditions and imposed along a line of\nconstant physics in parameter space. Our analysis involves correlation\nfunctions with boundary wave functions such that a large sensitivity to\n$c_\\mathrm A$ can be reached by exploiting the PCAC relation with two different\npseudoscalar states.",
        "category": "hep"
    },
    {
        "text": "Fresh look on triality: Investigating the $Z_3$ symmetry in Quantum Chromodynamics (QCD) we show that\nfull QCD with a vacuum of vanishing baryonic number does not lead to metastable\nphases. Rather in QCD with dynamical fermions, the degeneracy of $Z_3$ phases\nmanifests itself in observables without open triality.",
        "category": "hep"
    },
    {
        "text": "Quarkonium from the Fifth Dimension: Adding fundamental matter of mass m_Q to N=4 Yang Mills theory, we study\nquarkonium, and \"generalized quarkonium\" containing light adjoint particles. At\nlarge 't Hooft coupling the states of spin<=1 are anomalously light (Kruczenski\net al., hep-th/0304032). We examine their form factors, and show these hadrons\nare unlike any known in QCD. By a traditional yardstick they appear infinite in\nsize (as with strings in flat space) but we show that this is a failure of the\nyardstick. All of the hadrons are actually of finite size ~ \\sqrt{g^2N}/m_Q,\nregardless of their radial excitation level and of how many valence adjoint\nparticles they contain. Certain form factors for spin-1 quarkonia vanish in the\nlarge-g^2N limit; thus these hadrons resemble neither the observed J/Psi\nquarkonium states nor rho mesons.",
        "category": "hep"
    },
    {
        "text": "Improving the Top Quark Forward-Backward Asymmetry Measurement at the\n  LHC: At the LHC, top quark pairs are dominantly produced from gluons, making it\ndifficult to measure the top quark forward-backward asymmetry. To improve the\nasymmetry measurement, we study variables that can distinguish between top\nquarks produced from quarks and those from gluons: the invariant mass of the\ntop pair, the rapidity of the top-antitop system in the lab frame, the rapidity\nof the top quark in the top-antitop rest frame, the top quark polarization and\nthe top-antitop spin correlation. We combine all the variables in a likelihood\ndiscriminant method to separate quark-initiated events from gluon-initiated\nevents. We apply our method on models including G-prime's and W-prime's\nmotivated by the recent observation of a large top quark forward-backward\nasymmetry at the Tevatron. We have found that the significance of the asymmetry\nmeasurement can be improved by 10% to 30%. At the same time, the central values\nof the asymmetry increase by 40% to 100%. We have also analytically derived the\nbest spin quantization axes for studying top quark polarization as well as\nspin-correlation for the new physics models.",
        "category": "hep"
    },
    {
        "text": "Exploring Ultralight Scalar Assistance in Sterile Neutrino Dark Matter:\n  Cold Spectrum and Unusual X/Gamma-ray Signatures: We present a scalar-driven sterile neutrino production model where the\ninteraction with the ultralight scalar field modifies the oscillation\nproduction of sterile neutrinos in the early universe. The model effectively\nsuppresses the production of sterile neutrinos at low temperatures due to the\nheavy scalar mass, resulting in a colder matter power spectrum that avoids\nconstraints from small-scale structure observations. In this model, the\ndominant dark matter relic is from sterile neutrinos, with only a small\nfraction originating from the ultralight scalar. Furthermore, the model\npredicts a detectable X/gamma-ray flux proportional to the cubic density of\nlocal sterile neutrinos for a light scalar mass due to the light scalar\ncoupling to sterile neutrinos. This distinguishes our model from normal\ndecaying dark matter, which has a linear dependence on the density. In\naddition, the model predicts a potential low-energy monochromatic neutrino\nsignal that can be detectable by future neutrino telescopes.",
        "category": "hep"
    },
    {
        "text": "Flipped versions of the universal 3-3-1 and the left-right symmetric\n  models in $[SU(3)]^3$: a comprehensive approach: By considering the 3-3-1 and the left-right symmetric models as low energy\neffective theories of the $SU(3)_C\\otimes SU(3)_L\\otimes SU(3)_R$~(for short\n$[SU(3)]^3$) gauge group, alternative versions of these models are found. The\nnew neutral gauge bosons of the universal 3-3-1 model and its flipped versions\nare presented; also, the left-right symmetric model and its flipped variants\nare studied. Our analysis shows that there are two flipped versions of the\nuniversal 3-3-1 model, with the particularity that both of them have the same\nweak charges. For the left-right symmetric model we also found two flipped\nversions; one of them new in the literature which, unlike those of the 3-3-1,\nrequires a dedicated study of its electroweak properties. For all the models\nanalyzed, the couplings of the $Z'$ bosons to the standard model fermions are\nreported. The explicit form of the null space of the vector boson mass matrix\nfor an arbitrary Higgs tensor and gauge group is also presented. In the general\nframework of the $[SU(3)]^3$ gauge group, and by using the LHC experimental\nresults and EW precision data, limits on the $Z'$ mass and the mixing angle\nbetween $Z$ and the new gauge bosons $Z'$ are obtained. The general results\ncall for very small mixing angles in the range $10^{-3}$ radians and $M_{Z'}>$\n2.5 TeV.",
        "category": "hep"
    },
    {
        "text": "Lorentz Violation and Radiative Corrections in Gauge Theories: Various studies have already considered radiative corrections in\nLorentz-violating models unveiling many instances where a minimal or nonminimal\noperator generates, via loop corrections, a contribution to the photon sector\nof the Standard-Model Extension. However, an important fraction of this\nliterature does not follow the widely accepted conventions and notations of the\nStandard-Model Extension, and this obscures the comparison between different\ncalculations as well as possible phenomenological consequences. After reviewing\nsome of these works, we uncover one example where a well defined loop\ncorrection to the $k_{F}$ coefficient, already presented in the literature,\nallows us to improve the bounds on one specific coefficient of the fermion\nsector of the Lorentz-violating QED extension.",
        "category": "hep"
    },
    {
        "text": "Non-perturbative rheological behavior of a far-from-equilibrium\n  expanding plasma: For the Bjorken flow we investigate the hydrodynamization of different modes\nof the one-particle distribution function by analyzing its relativistic kinetic\nequations. We calculate the constitutive relations of each mode written as a\nmulti-parameter trans-series encoding the non-perturbative dissipative\ncontributions quantified by the Knudsen $Kn$ and inverse Reynolds $Re^{-1}$\nnumbers. At any given order in the asymptotic expansion of each mode, the\ntransport coefficients get effectively renormalized by summing over all\nnon-perturbative sectors appearing in the trans-series. This gives an effective\ndescription of the transport coefficients that provides a new renormalization\nscheme with an associated renormalization group equation, going beyond the\nrealms of linear response theory. As a result, the renormalized transport\ncoefficients feature a transition to their equilibrium fixed point, which is a\nneat diagnostics of transient non-Newtonian behavior. As a proof of principle,\nwe verify the predictions of the effective theory with the numerical solutions\nof their corresponding evolution equations. Our studies strongly suggest that\nthe phenomenological success of fluid dynamics far from local thermal\nequilibrium is due to the transient rheological behavior of the fluid.",
        "category": "hep"
    },
    {
        "text": "The spectrum of massive excitations of 3d 3-state Potts model and\n  universality: We consider the mass spectrum of the 3$d$ 3-state Potts model in the broken\nphase (a) near the second order Ising critical point in the temperature -\nmagnetic field plane and (b) near the weakly first order transition point at\nzero magnetic field. In the case (a), we compare the mass spectrum with the\nprediction from universality of mass ratios in the 3$d$ Ising class; in the\ncase (b), we determine a mass ratio to be compared with the corresponding one\nin the spectrum of screening masses of the (3+1)$d$ SU(3) pure gauge theory at\nfinite temperature in the deconfined phase near the transition. The agreement\nin the comparison in the case (a) would represent a non-trivial test of\nvalidity of the conjecture of spectrum universality. A positive answer to the\ncomparison in the case (b) would suggest the possibility to extend this\nconjecture to weakly first order phase transitions.",
        "category": "hep"
    },
    {
        "text": "Progress in calculation of the fourth Mellin moment of the pion\n  light-cone distribution amplitude using the HOPE method: The pion light-cone distribution amplitude (LCDA) is a central\nnon-perturbative object of interest for the calculation of high-energy\nexclusive processes in quantum chromodynamics. This article describes the\nprogress in the lattice QCD calculation of the fourth Mellin moment of the pion\nLCDA using a heavy-quark operator product expansion (HOPE).",
        "category": "hep"
    },
    {
        "text": "On the instantons and the hypermultiplet mass of N=2* super Yang-Mills\n  on S^4: We show that the physical N=4 super Yang-Mills theory on a four-sphere with\nan arbitrary gauge group receives no instanton contributions, by clarifying the\nrelation between the hypermultiplet mass and the equivariant parameters of the\nmass-deformed theory preserving N=2 supersymmetry. The correct relation also\nimplies that N=4 superconformal Yang-Mills theory with gauge group SU(2)\ncorresponds to Liouville theory on a torus with the insertion of a non-trivial\noperator, rather than the identity as have been claimed in the literature.",
        "category": "hep"
    },
    {
        "text": "Gluino production in some supersymmetric models at the LHC: In this article we review the mechanisms in several supersymmetric models for\nproducing gluinos at the LHC and its potential for discovering them. We focus\non the MSSM and its left-right extensions. We study in detail the strong sector\nof both models. Moreover, we obtain the total cross section and differential\ndistributions. We also make an analysis of their uncertainties, such as the\ngluino and squark masses, which are related to the soft SUSY breaking\nparameters.",
        "category": "hep"
    },
    {
        "text": "Diquark correlations in baryons: the Interacting Quark Diquark Model: A review of the underlying ideas of the Interacting Quark Diquark Model\n(IQDM) that asses the baryon spectroscopy in terms of quark diquark degrees of\nfreedom is given, together with a discussion of the missing resonances problem.\nSome ideas about its generalization the heavy baryon spectroscopy is given.s of\nfreedom is given, together with a discussion of the missing resonances problem.\nSome ideas about its generalization the heavy baryon spectroscopy is given.The\nresults are compared to the existing experimental data.",
        "category": "hep"
    },
    {
        "text": "Black Hole Condensation and Duality in String Theory: This is a non-technical version of a talk presented at the conference,\n\"S-Duality and Mirror Symmetry in String Theory\" Trieste, June, 1996 which will\nappear in the proceedings.",
        "category": "hep"
    },
    {
        "text": "Gravitational Violation of R Parity and its Cosmological Signatures: The discrete R-parity ($R_P$) usually imposed on the Supersymmetric (SUSY)\nmodels is expected to be broken at least gravitationally. If the neutralino is\na dark matter particle its decay channels into positrons, antiprotons and\nneutrinos are severely constrained from astrophysical observations. These\nconstraints are shown to be violated even for Planck-mass-suppressed\ndimension-five interactions arising from gravitational effects. We perform a\ngeneral analysis of gravitationally induced $R_P$ violation and identify two\nplausible and astrophysically consistent scenarios for achieving the required\nsuppression.",
        "category": "hep"
    },
    {
        "text": "Unitarity Analyses of $\u03c0N$ Elastic Scattering Amplitudes: The pion - nucleon scattering phase shifts in $s$ and $p$ waves are analyzed\nusing PKU unitarization approach that can separate the phase shifts into\ndifferent contributions from poles and branch cuts. It is found that in\n$S_{11}$ and $P_{11}$ channels, there exist large and positive missing\ncontributions when one compares the phase shift from known resonances plus\nbranch cuts with the experimental data, which indicates that those two channels\nmay contain sizable effects from $N^*(1535)$ and $N^*(1440)$ shadow poles.\nThose results are obtained using tree level results of the $\\pi N$ amplitude.",
        "category": "hep"
    },
    {
        "text": "A noncommutative-geometric interpretation of the resolution of\n  equivariant instanton moduli spaces: We generalize the recently proposed noncommutative ADHM construction to the\ncase of $\\Gamma$-equivariant instantons over $\\R^4$, with $\\Gamma$ a Kleinian\ngroup. We show that a certain form of the inhomogeneous ADHM equations\ndescribes instantons over a noncommutative deformation of the Kleinian orbifold\n$\\C^2/\\Gamma$ and we discuss the relation of this with Nakajima's description\nof instantons over ALE spaces. In particular, we obtain a noncommutative\ninterpretation of the minimal resolution of Kleinian singularities.",
        "category": "hep"
    },
    {
        "text": "Accumulation-Point Amplitudes in String Theory: We point out some common qualitative features of the Coon\namplitude$\\unicode{x2014}$a family of deformations of the Veneziano amplitude\nwith logarithmic Regge trajectories$\\unicode{x2014}$and the open string\nscattering amplitude for strings ending on a D-brane in AdS. Both reduce to the\nVeneziano amplitude at relatively low energies. Both systems have an\naccumulation point in their spectrum, with an infinite number of states below a\ncertain energy. The approach to this point is very similar. Both have the same\nhigh-energy fixed-angle behavior. Nevertheless, we find some differences in the\nspectrum of states with highest angular momentum. These similarities suggest\nthat there may exist a string background that realizes the Coon amplitude.",
        "category": "hep"
    },
    {
        "text": "Unruh detectors and quantum chaos in JT gravity: We identify the spectral properties of Hawking-Unruh radiation in the eternal\nblack hole at ultra low energies as a probe for the chaotic level statistics of\nquantum black holes. Level repulsion implies that there are barely Hawking\nparticles with an energy smaller than the level separation. This effect is\nexperimentally accessible by probing the Unruh heat bath with a linear\ndetector. We provide evidence for this effect via explicit and exact\ncalculations in JT gravity building on a radar definition of bulk observables\nin the model. Similar results are observed for the bath energy density. This\nuniversal feature of eternal Hawking radiation should resonate into the\nevaporating setup.",
        "category": "hep"
    },
    {
        "text": "Chiral Aspects of Improved Staggered Fermions with 2+1-Flavors from the\n  HotQCD Collaboration: We present recent results from lattice simulations of 2+1 flavors of improved\nstaggered fermions at zero baryon number density near the high temperature\ncrossover. Included are new results from simulations of asqtad fermions at Nt =\n12 and a nearly physical Goldstone pion mass and from simulations of HISQ\nfermions at Nt = 6 and 8. We focus on observables sensitive to chiral symmetry\nand confinement. A companion HotQCD talk discusses the effects of\nstaggered-fermion taste-symmetry breaking on thermodynamic quantities.",
        "category": "hep"
    },
    {
        "text": "Bootstrapping Coulomb and Higgs branch operators: We apply the numerical conformal bootstrap to correlators of Coulomb and\nHiggs branch operators in $4d$ $\\mathcal{N}=2$ superconformal theories. We\nstart by revisiting previous results on single correlators of Coulomb branch\noperators. In particular, we present improved bounds on OPE coefficients for\nsome selected Argyres-Douglas models, and compare them to recent work where the\nsame cofficients were obtained in the limit of large $r$ charge. There is solid\nagreement between all the approaches. The improved bounds can be used to\nextract an approximate spectrum of the Argyres-Douglas models, which can then\nbe used as a guide in order to corner these theories to numerical islands in\nthe space of conformal dimensions. When there is a flavor symmetry present, we\ncomplement the analysis by including mixed correlators of Coulomb branch\noperators and the moment map, a Higgs branch operator which sits in the same\nmultiplet as the flavor current. After calculating the relevant superconformal\nblocks we apply the numerical machinery to the mixed system. We put general\nconstraints on CFT data appearing in the new channels, with particular emphasis\non the simplest Argyres-Douglas model with non-trivial flavor symmetry.",
        "category": "hep"
    },
    {
        "text": "The Fundamental Constants in Physics and their Time Dependence: We discuss the fundamemtal constants in the Standard Model of particle\nphysics, in particular possible changes of these constants on the cosmological\ntime scale. The Grand Unification of the observed strong, electromagnetic and\nweak interactions implies relations between time variation of the finestructure\nconstant alpha and the QCD scale $\\Lambda_c$. The astrophysical observation of\na variation implies a time variation of $10^{-15} / year$. Several experiments\nin Quantum Optics, which were designed to look for a time variation of\n$\\Lambda_c$, are discussed.",
        "category": "hep"
    },
    {
        "text": "Carving Out the Space of 4D CFTs: We introduce a new numerical algorithm based on semidefinite programming to\nefficiently compute bounds on operator dimensions, central charges, and OPE\ncoefficients in 4D conformal and N=1 superconformal field theories. Using our\nalgorithm, we dramatically improve previous bounds on a number of CFT\nquantities, particularly for theories with global symmetries. In the case of\nSO(4) or SU(2) symmetry, our bounds severely constrain models of conformal\ntechnicolor. In N=1 superconformal theories, we place strong bounds on\ndim(Phi*Phi), where Phi is a chiral operator. These bounds asymptote to the\nline dim(Phi*Phi) <= 2 dim(Phi) near dim(Phi) ~ 1, forbidding positive\nanomalous dimensions in this region. We also place novel upper and lower bounds\non OPE coefficients of protected operators in the Phi x Phi OPE. Finally, we\nfind examples of lower bounds on central charges and flavor current two-point\nfunctions that scale with the size of global symmetry representations. In the\ncase of N=1 theories with an SU(N) flavor symmetry, our bounds on current\ntwo-point functions lie within an O(1) factor of the values realized in\nsupersymmetric QCD in the conformal window.",
        "category": "hep"
    },
    {
        "text": "The BRST treatment of stretched membranes: The BRST-invariant formulation of the bosonic stretched membrane is\nconsidered. In this formulation the stretched membrane is given as a\nperturbation around zero-tension membranes, where the BRST-charge decomposes as\na sum of a string-like BRST-charge and a perturbation. It is proven, by means\nof cohomology techniques, that there exists to any order in perturbation theory\na canonical transformation that reduces the full BRST-charge to the string-like\none. It is also shown that one may extend the results to the quantum level\nyielding a nilpotent charge in 27 dimensions.",
        "category": "hep"
    },
    {
        "text": "New CP observables in B0(t) -> hyperon + antihyperon from parity\n  violation in the sequential decay: We consider the decay B0(t) -> hyperon + antihyperon, followed by hyperon\nweak decay. We show that parity violation in the latter allows to reach new CP\nobservables: not only Im(lambda_f) but also Re(lambda_f) can be measured. In\nthe decay B0_d(t) -> Lambda LambdaBar (BR ~ 10-6), Lambda -> p pi- these\nobservables reduce to sin(2alpha) and cos(2alpha) in the small Penguin limit,\nthe latter solving the discrete ambiguity alpha -> pi/2 -alpha. For beta one\ncould consider the Cabibbo suppressed mode B0_d(t) -> Lambda_c Lambda_cBar (BR\n\\~ 10-4), Lambda_c -> Lambda pi+, p K0bar, ... (with BR ~ 10-2). The pure\nPenguin modes B0_s(t)->Sigma-Sigma-Bar, Xi-Xi-Bar, Omega-Omega-Bar (BR ~ 10-7)\ncan be useful in the search of CP violation beyond the Standard Model. Because\nof the small total rates, the study of these modes could only be done in future\nhigh statistics experiments. Also, in the most interesting case Lambda\nLambdaBar the time dependence of the asymmetry can be difficult to reconstruct.\nOn the other hand, we show that B_d mesons, being a coherent source of Lambda\nLambdaBar, is useful to look for CP violation in Lambda decay. We also discuss\nB0_d(t) -> J/Psi K*0 -> l+ l- K_S pi0 where the secondary decays conserve\nparity, and angular correlations allow to determine terms of the form\ncos(delta)cos(2beta), delta being a strong phase. This phase has been measured\nby CLEO, but we point out that a discrete ambiguity prevents to determine\nsign(cos(2beta)). However, if one assumes small strong phases, like in\nfactorization and as supported by CLEO data, one could have information on\nsign(cos(2beta)). Similar remarks can be done for cos(2alpha) in the decay\nB_d0(t) -> rho rho -> 4pi.",
        "category": "hep"
    },
    {
        "text": "Product Groups, Discrete Symmetries, and Grand Unification: We present GUT models based on an $SU(5)\\times SU(5)$ GUT group. These models\nmaintain the main successes of simple-group GUTs but permit simple solutions to\nthe doublet-triplet splitting problem. Moreover, GUT breaking is triggered by\nsupersymmetry breaking so that the GUT scale is naturally generated as a\ncombination of the Planck scale and the supersymmetry breaking scale.",
        "category": "hep"
    },
    {
        "text": "Conformal Quivers and Melting Molecules: Quiver quantum mechanics describes the low energy dynamics of a system of\nwrapped D-branes. It captures several aspects of single and multicentered BPS\nblack hole geometries in four-dimensional $\\mathcal{N} = 2$ supergravity such\nas the presence of bound states and an exponential growth of microstates. The\nCoulomb branch of an Abelian three node quiver is obtained by integrating out\nthe massive strings connecting the D-particles. It allows for a scaling regime\ncorresponding to a deep AdS$_2$ throat on the gravity side. In this scaling\nregime, the Coulomb branch is shown to be an $SL(2,\\mathbb{R})$ invariant\nmulti-particle superconformal quantum mechanics. Finally, we integrate out the\nstrings at finite temperature---rather than in their ground state---and show\nhow the Coulomb branch `melts' into the Higgs branch at high enough\ntemperatures. For scaling solutions the melting occurs for arbitrarily small\ntemperatures, whereas bound states can be metastable and thus long lived.\nThroughout the paper, we discuss how far the analogy between the quiver model\nand the gravity picture, particularly within the AdS$_2$ throat, can be taken.",
        "category": "hep"
    },
    {
        "text": "Conformally Invariant Sigma Models on Anti de Sitter Spaces,\n  Chern-Simons p-branes and W Geometry: Conformally invariant sigma models in $D=2n$ dimensions with target\nnon-compact O(2n,1) groups are studied. It is shown that despite the\nnon-compact nature of the O(2n,1) groups, the classical action and Hamiltonian\nare positive definite. Instanton field configurations are found to correspond\ngeometrically to conformal ``stereographic'' mappings of $R^{2n}$ into the\nEuclidean signature $AdS_{2n}$ spaces. Zaikov's relationship between Self Dual\n$p$-branes and Chern-Simons $p'$-branes, provided $p=p'+1$ and the embedding\n$D=p+1$-dimensional manifold is Euclidean, is elaborated further. Branes\nactions can be obtained also from a Moyal deformation quantization of\nGeneralized Yang Mills Theories. Using this procedure, we show how four\ndimensional SU(N) YM theories contain Chern-Simons membranes and hadronic bags\nin the large $N$ limit. Since Chern-Simons $p'$-branes have an underlying\ninfinite dimensional algebra containing $W_{1+\\infty}$, as shown by Zaikov, we\ndiscuss the importance that $W$ geometry should have in the final formulation\nof $M$ theory.",
        "category": "hep"
    },
    {
        "text": "QCD axion bubbles from the hidden SU(N) gauge symmetry breaking: The QCD axion bubbles can be formed due to an extra Peccei-Quinn (PQ)\nsymmetry breaking in the early Universe. In this paper, we investigate the QCD\naxion bubbles formation from the PQ symmetry broken by hidden $SU(N)_H$ gauge\ninteractions after inflation, which leads to the multiple vacua. The axion\nacquires a light mass and then settles down into different vacua. The QCD axion\nbubbles are formed when the conventional QCD axion arises during the QCD phase\ntransition. In our scenario, the QCD axions that start to oscillate at the\nlarge values $\\sim2\\pi/3$ can lead to the high density axion bubbles with\n$N=2$. The cosmological implications of the QCD axion bubbles are also\ndiscussed, such as the primordial black holes (PBHs) and the axion\nminiclusters. We find that the PBH mass is lager than\n$\\sim\\mathcal{O}(5\\times10^5)M_\\odot$ for the axion scale\n$f_a\\sim\\mathcal{O}(10^{16})\\, \\rm GeV$.",
        "category": "hep"
    },
    {
        "text": "Leptogenesis at the TeV scale: We present a general description of the problems encountered when attempting\nto build a simple model of leptogenesis and hence of baryogenesis at an energy\nscale as low as 1-10 TeV. We consider three possible lepton asymmetry\nenhancement mechanisms in the out-of-equilibrium decay scenario, emphasizing\nthe three body decay mechanism as most natural. A new model based on the three\nbody decays of right-handed neutrinos is proposed. It naturally allows both\nleptogenesis and neutrino mass generation at low scale. Also discussed is the\npossibility of inducing leptogenesis at low scale in existing neutrino mass\nmodels: Fukugita-Yanagida model, Higgs triplet model, Zee model and models with\nR-parity violation.",
        "category": "hep"
    },
    {
        "text": "The top squark-mediated annihilation scenario and direct detection of\n  dark matter in compressed supersymmetry: Top squark-mediated annihilation of bino-like neutralinos to top-antitop\npairs can play the dominant role in obtaining a thermal relic dark matter\nabundance in agreement with observations. In a previous paper, it was argued\nthat this can occur naturally in models of compressed supersymmetry, which\nfeature a running gluino mass parameter that is substantially smaller than the\nwino mass parameter at the scale of apparent gauge coupling unification. Here I\nstudy in some more detail the parameter space in which this is viable, and\ncompare to other scenarios for obtaining the observed dark matter density. I\nthen study the possibility of detecting the dark matter directly in future\nexperiments. The prospects are consistently very promising for a wide variety\nof model parameters within this scenario.",
        "category": "hep"
    },
    {
        "text": "Four-point renormalized coupling constant in O(N) models: The renormalized zero-momentum four-point coupling $g_r$ of O(N)-invariant\nscalar field theories in $d$ dimensions is studied by applying the 1/N\nexpansion and strong coupling analysis. The O(1/N) correction to the\n$\\beta$-function and to the fixed point value $g_r^*$ are explictly computed.\nStrong coupling series for lattice non-linear sigma models are analyzed near\ncriticality in d=2 and d=3 for several values of $N$ and the corresponding\nvalues of $g_r^*$ are extracted. Large-N and strong coupling results are\ncompared with each other, finding a good general agreement. For small N the\nstrong coupling analysis in 2-d gives the best determination of $g^*_r$ to date\n(or comparable for N=2,3 with the available Monte Carlo estimates), and in 3-d\nit is consistent with available $\\phi^4$ field theory results.",
        "category": "hep"
    },
    {
        "text": "Escher in the Sky: The cosmological models called $\\alpha$-attractors provide an excellent fit\nto the latest observational data. Their predictions $n_{s} = 1-2/N$ and $r =\n12\\alpha/N^{2}$ are very robust with respect to the modifications of the\ninflaton potential. An intriguing interpretation of $\\alpha$-attractors is\nbased on a geometric moduli space with a boundary: a Poincare disk model of a\nhyperbolic geometry with the radius $\\sqrt{3\\alpha}$, beautifully represented\nby the Escher's picture Circle Limit IV. In such models, the amplitude of the\ngravitational waves is proportional to the square of the radius of the Poincare\ndisk.",
        "category": "hep"
    },
    {
        "text": "Strongly Interacting Matter at Finite Chemical Potential : Hybrid Model\n  Approach: Search for a proper and realistic equation of state (EOS) for strongly\ninteracting matter used in the study of the QCD phase diagram still appears as\na challenging problem. Recently, we constructed a hybrid model description for\nthe quark gluon plasma (QGP) as well as hadron gas (HG) phases where we used an\nexcluded volume model for HG and a thermodynamically consistent quasiparticle\nmodel for the QGP phase. The hybrid model suitably describes the recent lattice\nresults of various thermodynamical as well as transport properties of the QCD\nmatter at zero baryon chemical potential ($\\mu_{B}$). In this paper, we extend\nour investigations further in obtaining the properties of QCD matter at finite\nvalue of $\\mu_{B}$ and compare our results with the most recent results of\nlattice QCD calculation.",
        "category": "hep"
    },
    {
        "text": "Differential equations and dispersion relations for Feynman amplitudes.\n  The two-loop massive sunrise and the kite integral: It is shown that the study of the imaginary part and of the corresponding\ndispersion relations of Feynman graph amplitudes within the differential\nequations method can provide a powerful tool for the solution of the equations,\nespecially in the massive case. The main features of the approach are\nillustrated by discussing the simple cases of the 1-loop self-mass and of a\nparticular vertex amplitude, and then used for the evaluation of the two-loop\nmassive sunrise and the QED kite graph (the problem studied by Sabry in 1962),\nup to first order in the (d-4) expansion.",
        "category": "hep"
    },
    {
        "text": "Higgs boson couplings as a probe of new physics: Precise measurements of various coupling constants of the 125 GeV Higgs boson\n$h$ are one of the most important and solid methods to determine the structure\nof the Higgs sector. If we find deviations in the $h$ coupling constants from\nthe standard model predictions, it can be an indirect evidence of the existence\nof additional Higgs bosons in non-minimal Higgs sectors. Furthermore, we can\ndistinguish non-minimal Higgs sectors by measuring a pattern of deviations in\nvarious $h$ couplings. In this talk, we show patterns of the deviations in\nseveral simple non-minimal Higgs sectors, especially for the gauge $hVV$ and\nYukawa $hf\\bar{f}$ couplings. This talk is based on the paper [1].",
        "category": "hep"
    },
    {
        "text": "Direct Detection of Light Dark Matter from Evaporating Primordial Black\n  Holes: The direct detection of sub-GeV dark matter interacting with nucleons is\nhampered by the low recoil energies induced by scatterings in the detectors.\nThis experimental difficulty is avoided in the scenario of boosted dark matter\nwhere a component of dark matter particles is endowed with large kinetic\nenergies. In this Letter, we point out that the current evaporation of\nprimordial black holes with masses from $10^{14}$ to $10^{16}$ g is a source of\nboosted light dark matter with energies of tens to hundreds of MeV. Focusing on\nthe XENON1T experiment, we show that these relativistic dark matter particles\ncould give rise to a signal orders of magnitude larger than the present upper\nbounds. Therefore, we are able to significantly constrain the combined\nparameter space of primordial black holes and sub-GeV dark matter. In the\npresence of primordial black holes with a mass of $10^{15}~\\mathrm{g}$ and an\nabundance compatible with present bounds, the limits on DM-nucleon\ncross-section are improved by four orders of magnitude.",
        "category": "hep"
    },
    {
        "text": "Lattice QCD calculations of nucleon transverse momentum-dependent parton\n  distributions using clover and domain wall fermions: We present a lattice QCD calculation of transverse momentum dependent parton\ndistribution functions (TMDs) of protons using staple-shaped Wilson lines. For\ntime-reversal odd observables, we calculate the generalized Sivers and\nBoer-Mulders transverse momentum shifts in SIDIS and DY cases, and for T-even\nobservables we calculate the transversity related to the tensor charge and the\ngeneralized worm-gear shift. The calculation is done on two different n_f=2+1\nensembles: domain-wall fermion (DWF) with lattice spacing 0.084 fm and pion\nmass of 297 MeV, and clover fermion with lattice spacing 0.114 fm and pion mass\nof 317 MeV. The results from those two different discretizations are consistent\nwith each other.",
        "category": "hep"
    },
    {
        "text": "Search for Z$\u03b3$ resonances using leptonic and hadronic final states\n  in proton-proton collisions at $\\sqrt{s}=$ 13 TeV: A search is presented for resonances decaying to a Z boson and a photon. The\nanalysis is based on data from proton-proton collisions at a center-of-mass\nenergy of 13 TeV, corresponding to an integrated luminosity of 35.9 fb$^{-1}$,\nand collected with the CMS detector at the LHC in 2016. Two decay modes of the\nZ boson are investigated. In the leptonic channels, the Z boson candidates are\nreconstructed using electron or muon pairs. In the hadronic channels, they are\nidentified using a large-radius jet, containing either light-quark or b quark\ndecay products of the Z boson, via jet substructure and advanced b quark\ntagging techniques. The results from these channels are combined and\ninterpreted in terms of upper limits on the product of the production cross\nsection and the branching fraction to Z$\\gamma$ for narrow and broad spin-0\nresonances with masses between 0.35 and 4.0 TeV, providing thereby the most\nstringent limits on such resonances.",
        "category": "hep"
    },
    {
        "text": "B physics at the DO Experiment at Fermilab: We discuss recent $B$ physics results from the D{\\O}experiment at Fermilab.\nThe results presented here use data sets with integrated luminosities ranging\nfrom $\\sim 200-440 $ pb$^{-1}$, collected at the Tevatron, between April 2002\nand August 2004, at a center of mass energy of $p {\\bar p}$ collisions of 1.96\nTeV",
        "category": "hep"
    },
    {
        "text": "Impacts of the Higgs mass on vacuum stability, running fermion masses\n  and two-body Higgs decays: The latest results of the ATLAS and CMS experiments indicate 116 GeV \\lesssim\nM_H \\lesssim 131 GeV and 115 GeV \\lesssim M_H \\lesssim 127 GeV, respectively,\nfor the mass of the Higgs boson in the standard model (SM) at the 95%\nconfidence level. In particular, both experiments point to a preferred narrow\nmass range M_H \\simeq (124 ... 126) GeV. We examine the impact of this\npreliminary result of M_H on the SM vacuum stability by using the two-loop\nrenormalization-group equations (RGEs), and arrive at the cutoff scale\n\\Lambda_VS \\sim 4 \\times 10^{12} GeV (for M_H = 125 GeV, M_t = 172.9 GeV and\n\\alpha_s(M_Z) = 0.1184) where the absolute stability of the SM vacuum is lost\nand some kind of new physics might take effect. We update the values of running\nlepton and quark masses at some typical energy scales, including the ones\ncharacterized by M_H, 1 TeV and \\Lambda_VS, with the help of the two-loop RGEs.\nThe branching ratios of some important two-body Higgs decay modes, such as H\n\\to b\\bar{b}, H \\to \\tau^+ \\tau^-, H\\to \\gamma\\gamma, H\\to W^+ W^- and H \\to Z\nZ, are also recalculated by inputting the values of relevant particle masses at\nM_H.",
        "category": "hep"
    },
    {
        "text": "Planck-Scale Physics and the Peccei-Quinn Mechanism: Global-symmetry violating higher-dimension operators, expected to be induced\nby Planck-scale physics, in general drastically alter the properties of the\naxion field associated with the Peccei-Quinn solution to the strong-CP problem,\nand render this solution unnatural. The particle physics and cosmology\nassociated with other global symmetries can also be significantly changed.",
        "category": "hep"
    },
    {
        "text": "Investigation of Dark Matter in Minimal 3-3-1 Models: It is shown that the 3-3-1 model with the minimal lepton content can work as\ntwo-Higgs-triplet 3-3-1 model while leaving the other scalars as inert\nparticles responsible for dark matter. We study two cases of dark matter\ncorresponding to the doublet and singlet scalar candidates. We figure out the\nparameter spaces in the WMAP allowed region of the relic density. The indirect\nand direct searches for dark matter in both cases are investigated by using\nmicrOMEGAs.",
        "category": "hep"
    },
    {
        "text": "Quantum Informational Dark Energy: Dark energy from forgetting: We suggest that dark energy has a quantum informational origin. Landauer's\nprinciple associated with the erasure of quantum information at a cosmic\nhorizon implies the non-zero vacuum energy having effective negative pressure.\nAssuming the holographic principle, the minimum free energy condition, and the\nGibbons-Hawking temperature for the cosmic event horizon we obtain the\nholographic dark energy with the parameter $d\\simeq 1$, which is consistent\nwith the current observational data. It is also shown that both the\nentanglement energy and the horizon energy can be related to Landauer's\nprinciple.",
        "category": "hep"
    },
    {
        "text": "The soft mode in the Sachdev-Ye-Kitaev model and its gravity dual: We give an exposition of the SYK model with several new results. A non-local\ncorrection to the Schwarzian effective action is found. The same action is\nobtained by integrating out the bulk degrees of freedom in a certain variant of\ndilaton gravity. We also discuss general properties of out-of-time-order\ncorrelators.",
        "category": "hep"
    },
    {
        "text": "A new method for suppressing excited-state contaminations on the nucleon\n  form factors: One of the most challenging tasks in lattice calculations of baryon form\nfactors is the analysis and control of excited-state contaminations. Taking the\nisovector axial form factors of the nucleon as an example, both a dispersive\nrepresentation and a calculation in chiral effective field theory show that the\nexcited-state contributions become dominant at fixed source-sink separation\nwhen the axial current is spatially distant from the nucleon source location.\nWe address this effect with a new method in which the axial current is\nlocalized by a Gaussian wave-packet and apply it on a CLS ensemble with\n$N_f=2+1$ flavors of O($a$) improved Wilson fermions with a pion mass of\n$m_\\pi=200\\,$MeV.",
        "category": "hep"
    },
    {
        "text": "Low-Energy Parity-Violation and New Physics: The new physics sensitivity of a variety of low-energy parity-violating (PV)\nobservables is analyzed. A comparison is made between atomic PV for a single\nisotope, atomic PV using isotope ratios, and PV electron-hadron and\nelectron-electron scattering. The complementarity among these observables, as\nwell as with high-energy processes, is emphasized. Theoretical uncertainties\nentering the interpretation of low-energy measurements are discussed.",
        "category": "hep"
    },
    {
        "text": "Holographic applications of logarithmic conformal field theories: We review the relations between Jordan cells in various branches of physics,\nranging from quantum mechanics to massive gravity theories. Our main focus is\non holographic correspondences between critically tuned gravity theories in\nAnti-de Sitter space and logarithmic conformal field theories in various\ndimensions. We summarize the developments in the past five years, include some\nnovel generalizations and provide an outlook on possible future developments.",
        "category": "hep"
    },
    {
        "text": "Indirect dark matter searches at ultrahigh energy neutrino detectors: High to ultrahigh energy neutrino detectors can uniquely probe the properties\nof dark matter $\\chi$ by searching for the secondary products produced through\nannihilation and/or decay processes. We evaluate the sensitivities to dark\nmatter thermally averaged annihilation cross section $\\langle\\sigma v\\rangle$\nand partial decay width into neutrinos $\\Gamma_{\\chi\\rightarrow\\nu\\bar{\\nu}}$\n(in the mass scale $10^7 \\leq m_\\chi/{\\rm GeV} \\leq 10^{15}$) for next\ngeneration observatories like POEMMA and GRAND. We show that in the range $\n10^7 \\leq m_\\chi/{\\rm GeV} \\leq 10^{11}$, space-based Cherenkov detectors like\nPOEMMA have the advantage of full-sky coverage and rapid slewing, enabling an\noptimized dark matter observation strategy focusing on the Galactic center. We\nalso show that ground-based radio detectors such as GRAND can achieve high\nsensitivities and high duty cycles in radio quiet areas. We compare the\nsensitivities of next generation neutrino experiments with existing constraints\nfrom IceCube and updated 90\\% C.L. upper limits on $\\langle\\sigma v\\rangle$ and\n$\\Gamma_{\\chi\\rightarrow\\nu\\bar{\\nu}}$ using results from the Pierre Auger\nCollaboration and ANITA. We show that in the range $ 10^7 \\leq m_\\chi/{\\rm GeV}\n\\leq 10^{11}$ POEMMA and GRAND10k will improve the neutrino sensitivity to\nparticle dark matter by factors of 2 to 10 over existing limits, whereas\nGRAND200k will improve this sensitivity by two orders of magnitude. In the\nrange $10^{11} \\leq m_\\chi/{\\rm GeV} \\leq 10^{15}$, POEMMA's fluorescence\nobservation mode will achieve an unprecedented sensitivity to dark matter\nproperties. Finally, we highlight the importance of the uncertainties related\nto the dark matter distribution in the Galactic halo, using the latest fit and\nestimates of the Galactic parameters.",
        "category": "hep"
    },
    {
        "text": "Local Gauss law and local gauge symmetries in QFT: Local gauge symmetries reduce to the identity on the observables, as well as\non the physical states (apart from reflexes of the local gauge group topology)\nand therefore their use in Quantum Field Theory (QFT) asks for a justification\nof their strategic role. They play an intermediate role in deriving the\nvalidity of Local Gauss Laws on the physical states (for the currents which\ngenerate the related global gauge group); conversely, we show that local gauge\nsymmetries arise whenever a vacuum representation of a local field algebra\n${\\cal{F}}$ is used for the description/construction of physical states\nsatisfying Local Gauss Laws, just as global compact gauge groups arise for the\ndescription of localizable states labeled by superselected quantum numbers. The\nabove relation suggests that the Gauss operator, which by locality cannot\nvanish in ${\\cal{F}}$, provides an intrinsic characterization of the\nrealizations of a gauge QFT in terms of a local field algebra and of the\nrelated local gauge symmetries.",
        "category": "hep"
    },
    {
        "text": "Model-Independent Bottom Baryon Mass Predictions in the 1/N Expansion: Recent discoveries of the Xi_b, Sigma_b and Sigma_b^* baryons at the Tevatron\nare in good agreement with model-independent mass predictions made a decade ago\nbased on a combined expansion in 1/N_c, 1/m_Q and SU(3) flavor symmetry\nbreaking. Using the new experimental data as input, mass predictions for the\nundiscovered bottom baryons Xi_b^\\prime, Xi_b^*, Omega_b and Omega_b^* and for\nmany unmeasured bottom baryon mass splittings are updated. The observed ground\nstate charm baryons exhibit the mass hierarchy previously predicted by the\n1/N_c, 1/m_Q and SU(3) flavor breaking expansion.",
        "category": "hep"
    },
    {
        "text": "Coherent Pion Production in Neutrino Nucleus Scattering: In this article, we study the coherent pion production in neutrino-nucleus\ninteraction in the resonance region using the formalism based on partially\nconserved axial current (PCAC) theorem which relates the neutrino-nucleus cross\nsection to the pion-nucleus elastic cross section. The pion nucleus elastic\ncross section is calculated using the Glauber model in terms of pion-nucleon\ncross sections obtained by parameterizing the experimental data. We calculate\nthe differential and integrated cross sections for charged current coherent\npion production in neutrino carbon scattering. The results of integrated cross\nsection calculations are compared with the measured data. Predictions for the\ndifferential and integrated cross sections for coherent pion productions in\nneutrino iron scattering using above formalism are also made.",
        "category": "hep"
    },
    {
        "text": "Physics Beyond SM at RHIC with Polarized Protons: The capabilities of RHIC with polarized protons to test the Lorentz structure\nof electroweak interactions and also the properties of MSSM Higgs, should it be\ndiscovered, are discussed.",
        "category": "hep"
    },
    {
        "text": "Theory determination of $\\bar{B}\\to D^{(*)}\\ell^-\\bar\u03bd$ form factors\n  at $\\mathcal{O}(1/m_c^2)$: We carry out an analysis of the full set of ten $\\bar{B}\\to D^{(*)}$ form\nfactors within the framework of the Heavy-Quark Expansion (HQE) to order\n$\\mathcal{O}(\\alpha_s,\\,1/m_b,\\,1/m_c^2)$, both with and without the use of\nexperimental data. This becomes possible due to a recent calculation of these\nform factors at and beyond the maximal physical recoil using QCD light-cone sum\nrules, in combination with constraints from lattice QCD, QCD three-point sum\nrules and unitarity. We find good agreement amongst the various theoretical\nresults, as well as between the theoretical results and the kinematical\ndistributions in $\\bar{B}\\to D^{(*)}\\lbrace e^-,\\mu^-\\rbrace\\bar\\nu$\nmeasurements. The coefficients entering at the $1/m_c^2$ level are found to be\nof $\\mathcal{O}(1)$, indicating convergence of the HQE. The phenomenological\nimplications of our study include an updated exclusive determination of\n$|V_{cb}|$ in the HQE, which is compatible with both the exclusive\ndetermination using the BGL parametrization and with the inclusive\ndetermination. We also revisit predictions for the lepton-flavour universality\nratios $R_{D^{(*)}}$, the $\\tau$ polarization observables $P_\\tau^{D^{(*)}}$,\nand the longitudinal polarization fraction $F_L$. Posterior samples for the HQE\nparameters are provided as ancillary files, allowing for their use in\nsubsequent studies.",
        "category": "hep"
    },
    {
        "text": "Differential Expansion for antiparallel triple pretzels: the way the\n  factorization is deformed: For a peculiar family of double braid knots there is a remarkable\nfactorization formula for the coefficients of the differential (cyclotomic)\nexpansion (DE), which nowadays is widely used to construct the exclusive Racah\nmatrices $S$ and $\\bar S$ in arbitrary representations. The origins of the\nfactorization remain obscure and the special role of double braids remains a\nmystery. In an attempt to broaden the perspective, we extend the family of\ndouble braids to antiparallel triple pretzels, which are obtained by the\ndefect-preserving deformation from the trefoil and all have defect zero. It\nturns out that factorization of DE coefficients is violated quite strongly,\nstill remains described by an elegant formula, at least for all symmetric\nrepresentations.",
        "category": "hep"
    },
    {
        "text": "Quantum Dynamics of Low-Energy Theory on Semilocal Non-Abelian Strings: Recently a low-energy effective theory on non-Abelian semilocal vortices in\nSQCD with the U(N) gauge group and N + \\tilde{N} quark flavors was obtained in\nfield theory arXiv:1104.2077. The result is exact in a certain limit of large\ninfrared cut-off. The resulting model was called the zn model. We study quantum\ndynamics of the zn model in some detail. First we solve it at large N in the\nleading order. Then we compare our results with those of Hanany and Tong\nhep-th/0403158 (the HT model) who based their derivation on a certain type-IIA\nformalism, rather than on a field-theory construction. In the 't Hooft limit of\ninfinite N both model's predictions are identical. At finite N our calculations\nagree with the Hanany-Tong results only in the BPS sector. Beyond the BPS\nsector there is no agreement between the zn and HT models. Finally, we study\nperturbation theory of the zn model from various standpoints.",
        "category": "hep"
    },
    {
        "text": "The strangest lifetime: A bizarre story of $\u03c4(\u03a9_c^0)$: For a long time it has been established both experimentally and theoretically\nthat $\\Omega_c^0$ is shortest-lived among the four singly charmed baryons which\ndecay weakly. The situation was dramatically changed in 2018 when LHCb reported\na new measurement of the $\\Omega_c^0$ lifetime using semileptonic $b$-hadron\ndecays. The value is nearly four times larger than the previous world average\nof $\\tau(\\Omega_c^0)$ and it is confirmed by the most recent LHCb measurement\nwith the prompt production. In this viewpoint article, we review the status and\npoint out that heavy quark expansion (HQE) fails to apply to $\\Omega_c^0$ to\nthe order of $1/m_c^4$. By demanding a sensible HQE for $\\Omega_c^0$ will lead\nto a lifetime of $\\Omega_c^0$ longer than $\\Lambda_c^+$.",
        "category": "hep"
    },
    {
        "text": "Autocorrelation in Updating Pure SU(3) Lattice Gauge Theory by the use\n  of Overrelaxed Algorithms: We measure the sweep-to-sweep autocorrelations of blocked loops below and\nabove the deconfinement transition for SU(3) on a $16^4$ lattice using\n20000-140000 Monte-Carlo updating sweeps. A divergence of the autocorrelation\ntime toward the critical $\\beta$ is seen at high blocking levels. The peak is\nnear $\\beta$ = 6.33 where we observe 440 $\\pm$ 210 for the autocorrelation time\nof $1\\times 1$ Wilson loop on $2^4$ blocked lattice. The mixing of 7 Brown-Woch\noverrelaxation steps followed by one pseudo-heat-bath step appears optimal to\nreduce the autocorrelation time below the critical $\\beta$. Above the critical\n$\\beta$, however, no clear difference between these two algorithms can be seen\nand the system decorrelates rather fast.",
        "category": "hep"
    },
    {
        "text": "The tetrahexahedric Calogero model: We consider the spherical reduction of the rational Calogero model (of type\n$A_{n-1}$, without the center of mass) as a maximally superintegrable quantum\nsystem. It describes a particle on the $(n{-}2)$-sphere in a very special\npotential. A detailed analysis is provided of the simplest non-separable case,\n$n{=}4$, whose potential blows up at the edges of a spherical tetrahexahedron,\ntesselating the two-sphere into 24 identical right isosceles spherical\ntriangles in which the particle is trapped. We construct a complete set of\nindependent conserved charges and of Hamiltonian intertwiners and elucidate\ntheir algebra. The key structure is the ring of polynomials in Dunkl-deformed\nangular momenta, in particular the subspaces invariant and antiinvariant under\nall Weyl reflections, respectively.",
        "category": "hep"
    }
]