Quark chiral condensate from the overlap quark propagator

Abstract

From the overlap lattice quark propagator calculated in the Landau gauge, we determine the quark chiral condensate by fitting operator product expansion formulas to the lattice data. The quark propagators are computed on domain wall fermion configurations generated by the RBC-UKQCD Collaborations with $N_f=2+1$ flavors. Three ensembles with different light sea quark masses are used at one lattice spacing $1/a=1.75(4)$ GeV. We obtain $\langle\barψψ\rangle^{\overline{\rm MS}}(2\mbox{ GeV})=(-305(15)(21)\mbox{ MeV})^3$ in the SU(2) chiral limit.

17 pages, 6 figures

References in corpus (4)

• Continuum Limit Physics from 2+1 Flavor Domain Wall QCD
• Spectral density of the Dirac operator in two-flavour QCD
• Renormalisation of quark propagators from twisted-mass lattice QCD at $N_f$=2
• Staggered chiral perturbation theory in the two-flavor case and SU(2) analysis of the MILC data

Cited by in corpus (7)

• FLAG Review 2021
• RI/MOM and RI/SMOM renormalization of overlap quark bilinears on domain wall fermion configurations
• Small parameters in infrared QCD: The pion decay constant
• Overlap quark propagator near the physical pion mass
• RI/MOM and RI/SMOM renormalization of quark bilinear operators using overlap fermions
• RI/(S)MOM renormalizations of overlap quark bilinears with different levels of hypercubic smearing
• Screened massive expansion of the quark propagator in the Landau gauge