Finite-volume effects in the hadronic vacuum polarizationWe investigate finite-volume effects in the hadronic vacuum polarization, with an eye toward the corresponding systematic error in the muon anomalous magnetic moment. While it is well known that…Christopher Aubin, Thomas Blum, Peter Chau et al.·Oct 18, 2015SaveLearn
Electromagnetic effects on the light hadron spectrumFor some time, the MILC Collaboration has been studying electromagnetic effects on light mesons. These calculations use fully dynamical QCD, but only quenched photons, which suffices to NLO in XPT.…MILC Collaboration, S. Basak, A. Bazavov et al.·Oct 16, 2015SaveLearn
The low-lying spectrum of N=1 supersymmetric Yang-Mills theoryThe spectrum of the lightest bound states in N=1 supersymmetric Yang-Mills theory with SU(2) gauge group, calculated on the lattice, is presented. The masses have first been extrapolated towards…Georg Bergner, Pietro Giudice, Istvan Montvay et al.·Oct 16, 2015SaveLearn
Determining the QCD coupling from lattice vacuum polarizationThe QCD coupling appears in the perturbative expansion of the current-current two-point (vacuum polarization) function. Any lattice calculation of vacuum polarization is plagued by several competing…Renwick J. Hudspith, Randy Lewis, Kim Maltman et al.·Oct 16, 2015SaveLearn
Multiscale Monte Carlo equilibration: Pure Yang-Mills theoryWe present a multiscale thermalization algorithm for lattice gauge theory, which enables efficient parallel generation of uncorrelated gauge field configurations. The algorithm combines standard…Michael G. Endres, Richard C. Brower, William Detmold et al.·Oct 15, 2015SaveLearn
Strongly coupled gauge theories: What can lattice calculations teach us?The dynamical origin of electroweak symmetry breaking is an open question with many possible theoretical explanations. Strongly coupled systems predicting the Higgs boson as a bound state of a new…A. Hasenfratz, R. C. Brower, C. Rebbi et al.·Oct 15, 2015SaveLearn
Renormalization of two-dimensional XQCDRecently, Kaplan proposed an interesting extension of QCD named Extended QCD or XQCD with bosonic auxiliary fields [1]. While its partition function is kept exactly the same as that of QCD, XQCD…Hidenori Fukaya, Ryo Yamamura·Oct 15, 2015SaveLearn
Fermion mass without symmetry breakingWe examine a model of reduced staggered fermions in three dimensions interacting through an SO(4) invariant four fermion interaction. The model is similar to that considered in a recent paper by…Simon Catterall·Oct 14, 2015SaveLearn
Calculation of free baryon spectral densities at finite temperatureFollowing a recent lattice study of nucleon parity doubling at finite temperature from the computation of the two-point nucleon correlators, we study the spectral functions of free nucleons at finite…Chrisanthi Praki, Gert Aarts·Oct 14, 2015SaveLearn
Probing parity doubling in nucleons at high temperatureThe spectrum of nucleons and their parity partners is studied as a function of temperature spanning the deconfinement transition. We analyse our results using the correlation functions directly,…Gert Aarts, Chris Allton, Simon Hands et al.·Oct 14, 2015SaveLearn
The U(1)A anomaly in high temperature QCD with chiral fermions on the latticeThe magnitude of the UA(1) symmetry breaking is expected to affect the nature of Nf=2 QCD chiral phase transition. The explicit breaking of chiral symmetry due to realistic light quark mass is…Sayantan Sharma, Viktor Dick, Frithjof Karsch et al.·Oct 13, 2015SaveLearn
QCD spectroscopy and quark mass renormalisation in external magnetic fields with Wilson fermionsWe study the change of the QCD spectrum of low-lying mesons in the presence of an external magnetic field using Wilson fermions in the quenched approximation. Motivated by qualitative differences…Gunnar Bali, Bastian B. Brandt, Gergely Endrodi et al.·Oct 13, 2015SaveLearn
Polyakov line actions from SU(3) lattice gauge theory with dynamical fermions: first results via relative weightsWe apply the relative weights method to extract an effective Polyakov line action, at finite chemical potential, from an underlying SU(3) lattice gauge theory with dynamical fermions. The…Roman Höllwieser, Jeff Greensite·Oct 13, 2015SaveLearn
Schwinger-Dyson Study for Walking/Conformal Dynamics with IR CutoffsMotivated by recent progress on many flavor QCD on a lattice, we investigate conformal/walking dynamics by using Schwinger-Dyson (SD) equation within an improved ladder approximation for two-loop…Kohtaroh Miura, Kei-ichi Nagai, Akihiro Shibata·Oct 13, 2015SaveLearn
Running coupling in SU(2) gauge theory with two adjoint fermionsWe study SU(2) gauge theory with two Dirac fermions in the adjoint representation of the gauge group on the lattice. Using clover improved Wilson fermion action with hypercubic truncated stout…Jarno Rantaharju, Teemu Rantalaiho, Kari Rummukainen et al.·Oct 12, 2015SaveLearn
BB interactions with static bottom quarks from Lattice QCDThe isospin, spin and parity dependent potential of a pair of B mesons is computed using Wilson twisted mass lattice QCD with two flavours of degenerate dynamical quarks. The B meson is addressed…Pedro Bicudo, Krzysztof Cichy, Antje Peters et al.·Oct 12, 2015SaveLearn
QCD thermodynamics with continuum extrapolated dynamical overlap fermionsWe study the finite temperature transition in QCD with two flavors of dynamical fermions at a pseudoscalar pion mass of about 350 MeV. We use lattices with temporal extent of Nt=8, 10 and 12. For…Sz. Borsanyi, Z. Fodor S. D. Katz S. Krieg, T. Lippert et al.·Oct 12, 2015SaveLearn
A Monte Carlo algorithm for simulating fermions on Lefschetz thimblesA possible solution of the notorious sign problem preventing direct Monte Carlo calculations for systems with non-zero chemical potential is to deform the integration region in the complex plane to a…Andrei Alexandru, Gokce Basar, Paulo Bedaque·Oct 12, 2015SaveLearn
A stochastic approach to the reconstruction of spectral functions in lattice QCDWe present a Stochastic Optimization Method (SOM) for the reconstruction of the spectral functions (SPFs) from Euclidean correlation functions. In this approach the SPF is parameterized as a sum of…Hai-Tao Shu, Heng-Tong Ding, Olaf Kaczmarek et al.·Oct 10, 2015SaveLearn
Composite Vector Particles in External Electromagnetic FieldsLattice quantum chromodynamics (QCD) studies of electromagnetic properties of hadrons and light nuclei, such as magnetic moments and polarizabilities, have proven successful with the use of…Zohreh Davoudi, William Detmold·Oct 8, 2015SaveLearn
Topological susceptibility from Nf=2+1+1 lattice QCD at nonzero temperatureWe present results for the topological susceptibility at nonzero temperature obtained from lattice QCD with four dynamical quark flavours. We apply different smoothing methods, including gradient…A. Trunin, F. Burger, E. -M. Ilgenfritz et al.·Oct 8, 2015SaveLearn
Towards the quark--gluon plasma Equation of State with dynamical strange and charm quarksWe present an ongoing project aimed at determining the thermodynamic Equation of State (EoS) of quark--gluon matter from lattice QCD with two generations of dynamical quarks. We employ the Wilson…F. Burger, E. -M. Ilgenfritz, M. P. Lombardo et al.·Oct 8, 2015SaveLearn
The lattice and quantized Yang-Mills theoryQuantized Yang-Mills fields lie at the heart of our understanding of the strong nuclear force. To understand the theory at low energies, we must work in the strong coupling regime. The primary…Michael Creutz·Oct 7, 2015SaveLearn
Three particles in a finite volumeThe volume-dependence of a shallow three-particle bound state in the cubic box with a size L is studied. It is shown that, in the unitary limit, the energy-level shift from the infinite-volume…Akaki Rusetsky·Oct 5, 2015SaveLearn
Universal aspects in the equation of state for Yang-Mills theoriesWe present high-precision lattice calculations of the thermodynamics of Yang-Mills theories with different gauge groups. In the confining phase, we show that the equation of state is described…Alessandro Nada·Oct 5, 2015SaveLearn