A multigrid accelerated eigensolver for the Hermitian Wilson-Dirac operator in lattice QCDEigenvalues of the Hermitian Wilson-Dirac operator are of special interest in several lattice QCD simulations, e.g., for noise reduction when evaluating all-to-all propagators. In this paper we…Andreas Frommer, Karsten Kahl, Francesco Knechtli et al.·Apr 17, 2020SaveLearn
Multigrid for Chiral Lattice Fermions: Domain WallCritical slowing down for the Krylov Dirac solver presents a major obstacle to further advances in lattice field theory as it approaches the continuum solution. We propose a new multi-grid approach…Richard C. Brower, M. A. Clark, Dean Howarth et al.·Apr 16, 2020SaveLearn
Neutrinoless Double Beta Decay from Lattice QCD: The Long-Distance π- → π+ e- e- AmplitudeNeutrinoless double beta decay (\( 0 νββ\)) is a hypothetical nuclear decay mode with important implications. In particular, observation of this decay would demonstrate that the neutrino is a…W. Detmold, D. J. Murphy·Apr 16, 2020SaveLearn
Finite temperature QCD with Nf=2+1+1 Wilson twisted mass fermions at physical pion, strange and charm massesWe discuss recent progress in studying Quantum Chromodynamics at finite temperature using Nf=2+1+1 Wilson twisted mass fermions. Particular interest is in QCD symmetries and their breaking and…Andrey Yu. Kotov, Maria Paola Lombardo, Anton M. Trunin·Apr 15, 2020SaveLearn
Towards a reliable lower bound on the location of the critical endpointWe perform the first direct determination of the position of the leading singularity of the pressure in the complex chemical potential μB plane in lattice QCD using numerical simulations with…Matteo Giordano, Konel Kapas, Sandor D. Katz et al.·Apr 15, 2020SaveLearn
Critical analysis of two-dimensional classical XY modelWe consider the two-dimensional classical XY model on a square lattice in the thermodynamic limit using tensor renormalization group and precisely determine the critical temperature corresponding to…Raghav G. Jha·Apr 14, 2020SaveLearn
Deconfinement transition line with the Complex Langevin equation up to μ /T 5We study the deconfinement transition line in QCD for quark chemical potentials up to μq 5 T (μB 15 T). To circumvent the sign problem we use the complex Langevin equation with…M. Scherzer, D. Sexty, I. -O. Stamatescu·Apr 11, 2020SaveLearn
New insights on proton structure from lattice QCD: the twist-3 parton distribution function gT(x)In this work, we present the first-ever calculation of the isovector flavor combination of the twist-3 parton distribution function gT(x) for the proton from lattice QCD. We use an ensemble of…Shohini Bhattacharya, Krzysztof Cichy, Martha Constantinou et al.·Apr 8, 2020SaveLearn
Finite-volume and thermal effects in the leading-HVP contribution to muonic (g-2)The leading finite-volume and thermal effects, arising in numerical lattice QCD calculations of aHVP,LOμ (g-2)HVP,LOμ/2, are determined to all orders with respect…Maxwell T. Hansen, Agostino Patella·Apr 8, 2020SaveLearn
Ward Identity of the Vector Current and the Decay Rate of ηc→γγ in Lattice QCDUsing a recently proposed method arXiv:1910.11597 (Yu Meng et al.), we study the two-photon decay rate of ηc using two Nf=2 twisted mass gauge ensembles with lattice spacings 0.067fm and…Chuan Liu, Yu Meng, Ke-Long Zhang·Apr 8, 2020SaveLearn
Density of states approach for lattice gauge theory with a θ-termWe discuss a new strategy for treating the complex action problem of lattice field theories with a θ-term based on density of states (DoS) methods. The key ingredient is to use open boundary…Christof Gattringer, Oliver Orasch·Apr 8, 2020SaveLearn
Sparse modeling approach to obtaining the shear viscosity from smeared correlation functionsWe propose the sparse modeling method to estimate the spectral function from the smeared correlation functions. We give a description of how to obtain the shear viscosity from the correlation…Etsuko Itou, Yuki Nagai·Apr 6, 2020SaveLearn
Beauty mesons in Nf=2+1+1+1 lattice QCD with exact chiral symmetryWe present the first study of Nf=2+1+1+1 lattice QCD with domain-wall quarks. The (b, c, s) quarks are physical, while the (u, d) quarks are heavier than their physical masses, with the pion…Ting-Wai Chiu·Apr 5, 2020SaveLearn
Parton Distribution Functions from Ioffe Time Pseudodistributions from Lattice Calculations: Approaching the Physical PointWe present results for the unpolarized parton distribution function of the nucleon computed in lattice QCD at the physical pion mass. This is the first study of its kind employing the method of Ioffe…Bálint Joó, Joseph Karpie, Kostas Orginos et al.·Apr 3, 2020SaveLearn
The HAL QCD potential in I=1 ππ system with the ρ meson bound stateIn this paper, we investigate the HAL QCD potential in the I=1 ππ scattering using the hybrid method for all-to-all propagators, in which a propagator is approximated by low-eigenmodes and the…Yutaro Akahoshi, Sinya Aoki, Tatsumi Aoyama et al.·Apr 3, 2020SaveLearn
Constraints of kinematic bosonization in two and higher dimensionsContrary to the common wisdom, local bosonizations of fermionic systems exist in higher dimensions. Interestingly, resulting bosonic variables must satisfy local constraints of a gauge type. They…Arkadiusz Bochniak, Blazej Ruba, Jacek Wosiek et al.·Apr 2, 2020SaveLearn
Dislocations under gradient flow and their effect on the renormalized couplingNon-zero topological charge is prohibited in the chiral limit of gauge-fermion systems because any instanton would create a zero mode of the Dirac operator. On the lattice, however, the geometric…Anna Hasenfratz, Oliver Witzel·Apr 2, 2020SaveLearn
Gradient flow step-scaling function for SU(3) with ten fundamental flavorsWe calculate the step scaling function, the lattice analog of the renormalization group β-function, for an SU(3) gauge theory with ten fundamental flavors. We present a detailed analysis including…Anna Hasenfratz, Claudio Rebbi, Oliver Witzel·Apr 2, 2020SaveLearn
Lattice B D(*) form factors, R(D(*)), and |Vcb|I discuss recent progress in lattice calculations of B D(*) ν form factors, important for the precision determination of |Vcb| in the Standard Model (SM), and for testing SM…Andrew Lytle·Apr 2, 2020SaveLearn
Inhomogeneous phases in the Gross-Neveu model in 1+1 dimensions at finite number of flavorsWe explore the thermodynamics of the 1+1-dimensional Gross-Neveu (GN) model at finite number of fermion flavors Nf, finite temperature and finite chemical potential using lattice field theory. In…Julian Lenz, Laurin Pannullo, Marc Wagner et al.·Apr 1, 2020SaveLearn
Valence-Quark Distribution of the Kaon and Pion from Lattice QCDWe present the first lattice-QCD calculation of the kaon valence-quark distribution functions using the large-momentum effective theory (LaMET) approach. The calculation is performed with multiple…Huey-Wen Lin, Jiunn-Wei Chen, Zhouyou Fan et al.·Mar 31, 2020SaveLearn
Strong coupling from non-equilibrium Monte Carlo simulationsWe compute the running coupling of non-Abelian gauge theories in the Schr\"odinger-functional scheme, by means of non-equilibrium Monte Carlo simulations on the lattice.Olmo Francesconi, Marco Panero, David Preti·Mar 30, 2020SaveLearn
Remarks on strange-quark simulations with Wilson fermionsIn the simulation of QCD with 2+1 flavors of Wilson fermions, the positivity of the fermion determinant is generally assumed. We present evidence that this assumption is in general not justified and…Daniel Mohler, Stefan Schaefer·Mar 30, 2020SaveLearn
Trace anomaly and dynamical quark massWe investigated the origin of the RI'/MOM quark mass under the Landau gauge at the non-perturbative scale, using the chiral fermion with different quark masses and lattice spacings. Our result…Yi-Bo Yang, Jian Liang, Zhaofeng Liu et al.·Mar 29, 2020SaveLearn
Charting the scaling region of the Ising universality class in two and three dimensionsWe study the behaviour of a universal combination of susceptibility and correlation length in the Ising model in two and three dimensions, in presence of both magnetic and thermal perturbations, in…Michele Caselle, Marianna Sorba·Mar 27, 2020SaveLearn