Lifting flat directions in lattice supersymmetryWe present a procedure to improve the lattice definition of N = 4 supersymmetric Yang--Mills theory. The lattice construction necessarily involves U(1) flat directions, and we show how…Simon Catterall, David Schaich·May 12, 2015SaveLearn
Transition of ρ→ πγ in Lattice QCDWith the ongoing experimental interest in exploring the excited hadron spectrum, evaluations of the matrix elements describing the formation and decay of such states via radiative processes provide…Benjamin J. Owen, Waseem Kamleh, Derek B. Leinweber et al.·May 12, 2015SaveLearn
Quark Masses from Lattice QCDIn this talk I review several topics concerning the determination of quark masses by means of lattice QCD simulations, with particular focus on recently introduced techniques of non-perturbative…Francesco Sanfilippo·May 11, 2015SaveLearn
U(1) lattice gauge theory with a topological actionWe investigate the phase diagram of the compact U(1) lattice gauge theory in four dimensions using a non-standard action which is invariant under continuous deformations of the plaquette angles.…Oscar Akerlund, Philippe de Forcrand·May 11, 2015SaveLearn
Ab initio calculation of the np d γ radiative capture processLattice QCD calculations of two-nucleon systems are used to isolate the short-distance two-body electromagnetic contributions to the radiative capture process np dγ, and the…Silas R. Beane, Emmanuel Chang, William Detmold et al.·May 10, 2015SaveLearn
Impact of electromagnetism on phase structure for Wilson and twisted-mass fermions including isospin breakingIn a recent paper we used chiral perturbation theory to determine the phase diagram and pion spectrum for Wilson and twisted-mass fermions at non-zero lattice spacing with non-degenerate up and down…Derek P. Horkel, Stephen R. Sharpe·May 9, 2015SaveLearn
High-precision calculation of the strange nucleon electromagnetic form factorsWe report a direct lattice QCD calculation of the strange nucleon electromagnetic form factors GEs and GMs in the kinematic range 0 ≤ Q2 1.2\: GeV2. For the first time,…Jeremy Green, Stefan Meinel, Michael Engelhardt et al.·May 7, 2015SaveLearn
Dirac Spectrum of the Wilson Dirac Operator for QCD with Two ColorsWe study the lattice artefacts of the Wilson Dirac operator for QCD with two colors and fermions in the fundamental representation from the viewpoint of chiral perturbation theory. These effects are…Mario Kieburg, Jacobus J. M. Verbaarschot, Savvas Zafeiropoulos·May 7, 2015SaveLearn
Hagedorn spectrum and thermodynamics of SU(2) and SU(3) Yang-Mills theoriesWe present a high-precision lattice calculation of the equation of state in the confining phase of SU(2) Yang-Mills theory. We show that the results are described very well by a gas of massive,…Michele Caselle, Alessandro Nada, Marco Panero·May 5, 2015SaveLearn
Numerical corrections to the strong coupling effective Polyakov-line action for finite T Yang-Mills theoryWe consider a three-dimensional effective theory of Polyakov lines derived previously from lattice Yang-Mills theory and QCD by means of a resummed strong coupling expansion. The effective theory is…Georg Bergner, Jens Langelage, Owe Philipsen·May 5, 2015SaveLearn
Evidence for the existence of u d b b and the non-existence of s s b b and c c b b tetraquarks from lattice QCDWe combine lattice QCD results for the potential of two static antiquarks in the presence of two quarks q q of finite mass and quark model techniques to study possibly existing $q q b…Pedro Bicudo, Krzysztof Cichy, Antje Peters et al.·May 4, 2015SaveLearn
Spontaneous supersymmetry breaking in two dimensional lattice super QCDWe report on a non-perturbative study of two dimensional =(2,2) super QCD. Our lattice formulation retains a single exact supersymmetry at non-zero lattice spacing, and contains Nf fermions…Simon Catterall, Aarti Veernala·May 3, 2015SaveLearn
Thermal evolution of the Schwinger model with Matrix Product OperatorsWe demonstrate the suitability of tensor network techniques for describing the thermal evolution of lattice gauge theories. As a benchmark case, we have studied the temperature dependence of the…M. C. Bañuls, K. Cichy, J. I. Cirac et al.·May 1, 2015SaveLearn
New insights into the problem with a singular drift term in the complex Langevin methodThe complex Langevin method aims at performing path integral with a complex action numerically based on complexification of the original real dynamical variables. One of the poorly understood issues…Jun Nishimura, Shinji Shimasaki·Apr 30, 2015SaveLearn
Critical point in the QCD phase diagram for extremely strong background magnetic fieldsLattice simulations have demonstrated that a background (electro)magnetic field reduces the chiral/deconfinement transition temperature of quantum chromodynamics for eB < 1 GeV2. On the level of…Gergely Endrodi·Apr 30, 2015SaveLearn
On the weak N-dependence of SO(N) and SU(N) gauge theories in 2+1 dimensionsWe consider (continuum) mass ratios of the lightest `glueballs' as a function of N for SO(N) and SU(N) lattice gauge theories in D=2+1. We observe that the leading large N correction is usually…Andreas Athenodorou, Richard Lau, Michael Teper·Apr 30, 2015SaveLearn
Non-perturbative Test of the Witten-Veneziano Formula from Lattice QCDWe compute both sides of the Witten-Veneziano formula using lattice techniques. For the one side we perform dedicated quenched simulations and use the spectral projector method to determine the…Krzysztof Cichy, Elena Garcia-Ramos, Karl Jansen et al.·Apr 29, 2015SaveLearn
A Lattice Calculation of Parton DistributionsWe report on our exploratory study for the direct evaluation of the parton distribution functions from lattice QCD, based on a recently proposed new approach. We present encouraging results using Nf…Constantia Alexandrou, Krzysztof Cichy, Vincent Drach et al.·Apr 28, 2015SaveLearn
Center Vortex vs. Abelian models of the QCD vacuumWe present evidence that the center vortex model of confinement is more consistent with lattice results than other currently available models. In particular we show that Abelian field distributions…Roman Höllwieser, Jeff Greensite·Apr 28, 2015SaveLearn
Continuum Study of Heavy Quark DiffusionWe report on a lattice investigation of heavy quark momentum diffusion within the pure SU(3) plasma above the deconfinement transition with the quarks treated to leading order in the heavy mass…Thomas Neuhaus·Apr 28, 2015SaveLearn
Canonical approach to finite density QCD with multiple precision computationWe calculate the baryon chemical potential (μB) dependence of thermodynamic observables, i.e., pressure, baryon number density and susceptibility by lattice QCD using the canonical approach. We…Ryutaro Fukuda, Atsushi Nakamura, Shotaro Oka·Apr 23, 2015SaveLearn
Precision study of critical slowing down in lattice simulations of the CPN-1 modelWith the aim of studying the relevance and properties of critical slowing down in Monte Carlo simulations of lattice quantum field theories we carried out a high precision numerical study of the…Jonathan Flynn, Andreas Juttner, Andrew Lawson et al.·Apr 23, 2015SaveLearn
Lattice QCD Green's functions in maximally Abelian gauge: infrared Abelian dominance and the quark sectorOn lattice gauge field configurations with 2+1 dynamical quark flavors, we investigate the momentum space quark and gluon propagators in the combined maximally Abelian plus U(1)3× U(1)8…Mario Schröck, Hannes Vogt·Apr 21, 2015SaveLearn
Thermodynamics of strong-interaction matter from Lattice QCDWe review results from lattice QCD calculations on the thermodynamics of strong-interaction matter with emphasis on input these calculations can provide to the exploration of the phase diagram and…Heng-Tong Ding, Frithjof Karsch, Swagato Mukherjee·Apr 21, 2015SaveLearn
Nucleon electromagnetic form factors in two-flavour QCDWe present results for the nucleon electromagnetic form factors, including the momentum transfer dependence and derived quantities (charge radii and magnetic moment). The analysis is performed using…S. Capitani, M. Della Morte, D. Djukanovic et al.·Apr 17, 2015SaveLearn