Quark chiral condensate from the overlap quark propagator

• 来源期刊: 中国物理C（英文版）
• 年，卷（期）: 2017,（5）
• 页码范围: 26-34
• 页数: 9页
• 语种: 英文
• DOI: 10.1088/1674-1137/41/5/053102

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 Nf =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 <ψψ>MS(2 GeV)=(-304(15)(20) MeV)3 in the SU(2) chiral limit.