摘要
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 ＋ 1flavors.Three ensembles with different light sea quark masses are used at one lattice spacing 1/a = 1.75（4） Ge V.We obtain ψψ （2 GeV）MS =（-304（15）（20） MeV）~3in the SU（2） chiral limit.
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 ＋ 1flavors.Three ensembles with different light sea quark masses are used at one lattice spacing 1/a = 1.75（4） Ge V.We obtain ψψ （2 GeV）MS =（-304（15）（20） MeV）~3in the SU（2） chiral limit.
基金
Supported by National Natural Science Foundation of China(11575197,11575196,11335001,11405178)
joint funds of NSFC(U1632104,U1232109)
the support of NSFC and DFG(CRC110)
