Multigrid for Staggered Lattice FermionsCritical slowing down in Krylov methods for the Dirac operator presents a major obstacle to further advances in lattice field theory as it approaches the continuum solution. Here we formulate a…Richard C. Brower, M. A. Clark, Alexei Strelchenko et al.·Jan 24, 2018SaveLearn
Calculation of the hadronic vacuum polarization contribution to the muon anomalous magnetic momentWe present a first-principles lattice QCD+QED calculation at physical pion mass of the leading-order hadronic vacuum polarization contribution to the muon anomalous magnetic moment. The total…T. Blum, P. A. Boyle, V. Gülpers et al.·Jan 22, 2018SaveLearn
On the convergence of the chiral expansion for the baryon ground-state massesWe study the chiral expansion of the baryon octet and decuplet masses in the isospin limit. It is illustrated that a chiral expansion of the one-loop contributions is rapidly converging up to quark…M. F. M. Lutz, Yonggoo Heo, Xiao-Yu Guo·Jan 19, 2018SaveLearn
Tuning the Hybrid Monte Carlo algorithm using molecular dynamics forces' variancesWithin the HMC algorithm, we discuss how, by using the shadow Hamiltonian and the Poisson brackets, one can achieve a simple factorization in the dependence of the Hamiltonian violations upon either…Andrea Bussone, Michele Della Morte, Vincent Drach et al.·Jan 19, 2018SaveLearn
Progress on Complex Langevin simulations of a finite density matrix model for QCDWe study the Stephanov model, which is an RMT model for QCD at finite density, using the Complex Langevin algorithm. Naive implementation of the algorithm shows convergence towards the phase quenched…Jacques Bloch, Jonas Glesaaen, Jacobus Verbaarschot et al.·Jan 19, 2018SaveLearn
Scaling properties of multiscale equilibrationWe investigate the lattice spacing dependence of the equilibration time for a recently proposed multiscale thermalization algorithm for Markov chain Monte Carlo simulations. The algorithm uses a…William Detmold, Michael G. Endres·Jan 18, 2018SaveLearn
Machine learning action parameters in lattice quantum chromodynamicsNumerical lattice quantum chromodynamics studies of the strong interaction are important in many aspects of particle and nuclear physics. Such studies require significant computing resources to…Phiala E. Shanahan, Amalie Trewartha, William Detmold·Jan 17, 2018SaveLearn
SO(4), SO(3) and SU(2) gauge theories in 2+1 dimensions: comparing glueball spectra and string tensionsWe improve upon recent calculations of the low-lying `glueball' spectra of SO(3) and SO(4) lattice gauge theories in 2+1 dimensions, and compare the resulting continuum extrapolations with SU(2).…Michael Teper·Jan 17, 2018SaveLearn
Tensor network formulation for two-dimensional lattice N=1 Wess-Zumino modelSupersymmetric models with spontaneous supersymmetry breaking suffer from the notorious sign problem in stochastic approaches. By contrast, the tensor network approaches do not have such a problem…Daisuke Kadoh, Yoshinobu Kuramashi, Yoshifumi Nakamura et al.·Jan 12, 2018SaveLearn
Hadronic light-by-light scattering contribution to the muon g-2 on the latticeWe briefly review several activities at Mainz related to hadronic light-by-light scattering (HLbL) using lattice QCD. First we present a position-space approach to the HLbL contribution in the muon…Nils Asmussen, Antoine Gerardin, Jeremy Green et al.·Jan 12, 2018SaveLearn
QCD thermodynamics from lattice calculations with non-equilibrium methods: The SU(3) equation of stateA precise lattice determination of the equation of state in SU(3) Yang-Mills theory is carried out by means of a simulation algorithm, based on Jarzynski's theorem, that allows one to compute…Michele Caselle, Alessandro Nada, Marco Panero·Jan 9, 2018SaveLearn
Isovector and flavor-diagonal charges of the nucleonWe present an update on the status of the calculations of isovector and flavor-diagonal charges of the nucleon. The calculations of the isovector charges are being done using ten 2+1+1-flavor HISQ…Rajan Gupta, Tanmoy Bhattacharya, Yong-Chull Jang et al.·Jan 9, 2018SaveLearn
The A2 Asymmetry and Longitudinal Propagator in Lattice SU(2) Gluodynamics at T TcWe study numerically the chromoelectric-chromomagnetic asymmetry of the dimension two gluon condensate as well as the longitudinal gluon propagator at T Tc in the Landau-gauge SU(2)…V. G. Bornyakov, V. V. Bryzgalov, V. K. Mitrjushkin et al.·Jan 8, 2018SaveLearn
Nucleon Axial and Electromagnetic Form FactorsWe present results for the isovector axial, induced pseudoscalar, electric, and magnetic form factors of the nucleon. The calculations were done using 2+1+1-flavor HISQ ensembles generated by the…Yong-Chull Jang, Tanmoy Bhattacharya, Rajan Gupta et al.·Jan 5, 2018SaveLearn
Portable multi-node LQCD Monte Carlo simulations using OpenACCThis paper describes a state-of-the-art parallel Lattice QCD Monte Carlo code for staggered fermions, purposely designed to be portable across different computer architectures, including GPUs and…Claudio Bonati, Enrico Calore, Massimo D'Elia et al.·Jan 4, 2018SaveLearn
The pion quasiparticle in the low-temperature phase of QCDWe extend our previous studies [PhysRevD.90.054509, PhysRevD.92.094510] of the pion quasiparticle in the low-temperature phase of two-flavor QCD with support from chiral effective theory. This…Bastian B. Brandt, Anthony Francis, Harvey B. Meyer et al.·Dec 31, 2017SaveLearn
Nonperturbative study of dynamical SUSY breaking in N = (2, 2) Yang-MillsWe examine the possibility of dynamical supersymmetry breaking in two-dimensional N = (2, 2) supersymmetric Yang-Mills theory. The theory is discretized on a Euclidean spacetime lattice…Simon Catterall, Raghav G. Jha, Anosh Joseph·Dec 29, 2017SaveLearn
Scattering amplitude from Bethe-Salpeter wave function inside the interaction rangeWe propose a method to calculate scattering amplitudes using the Bethe-Salpeter wave function inside the interaction range on the lattice. For an exploratory study of this method, we evaluate a…Yusuke Namekawa, Takeshi Yamazaki·Dec 29, 2017SaveLearn
K π matrix elements of the chromomagnetic operator on the latticeWe present the results of the first lattice QCD calculation of the K π matrix elements of the chromomagnetic operator OCM = g\, s\, σμν Gμν d, which appears in the effective…M. Constantinou, M. Costa, R. Frezzotti et al.·Dec 28, 2017SaveLearn
Gauge-invariant screening masses and static quark free energies in Nf = 2+1 QCD at non-zero baryon densityWe discuss the extension of gauge-invariant electric and magnetic screening masses in the Quark-Gluon Plasma to the case of a finite baryon density, defining them in terms of a matrix of Polyakov…Michele Andreoli, Claudio Bonati, Massimo D'Elia et al.·Dec 28, 2017SaveLearn
Improving the theoretical prediction for the Bs-Bs width difference: matrix elements of next-to-leading order ΔB=2 operatorsWe present lattice QCD results for the matrix elements of R2 and other dimension-7, ΔB = 2 operators relevant for calculations of ΔΓs, the Bs-Bs width difference. We have computed…Christine Davies, Judd Harrison, G Peter Lepage et al.·Dec 28, 2017SaveLearn
Simulation of an ensemble of Nf=2+1+1 twisted mass clover-improved fermions at physical quark massesWe present a general strategy aimed at generating Nf=2+1+1 configurations with quarks at their physical mass using maximally twisted mass fermions to ensure automatic O(a) improvement, in the…Jacob Finkenrath, Constantia Alexandrou, Simone Bacchio et al.·Dec 27, 2017SaveLearn
An analysis of the Lattice QCD spectra for D*s0(2317) and D*s1(2460)In this talk I present the results obtained using effective field theories in a finite volume from a reanalysis of lattice data on the KD(*) systems, where bound states of KD and KD* are…A. Martinez Torres, E. Oset, S. Prelovsek et al.·Dec 27, 2017SaveLearn
B- and D-meson leptonic decay constants from four-flavor lattice QCDWe calculate the leptonic decay constants of heavy-light pseudoscalar mesons with charm and bottom quarks in lattice quantum chromodynamics on four-flavor QCD gauge-field configurations with…A. Bazavov, C. Bernard, N. Brown et al.·Dec 26, 2017SaveLearn
Dispersion relation and unphysical poles of Möbius domain-wall fermions in free field theory at finite LsWe investigate the dispersion relation of Möbius domain-wall fermions in free field theory at finite Ls. We find that there are Ls-1 extra poles of Möbius domain-wall fermions in addition to…Masaaki Tomii·Dec 26, 2017SaveLearn