Determination of the chiral condensate from (2+1)-flavor lattice QCD.
Determination of the chiral condensate from (2+1)-flavor lattice QCD.
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DOI：
10.1103/physrevlett.104.122002
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发表时间：
2009-11
影响因子：
8.6
通讯作者：
H. Fukaya;S. Aoki;S. Hashimoto;T. Kaneko;J. Noaki;T. Onogi;N. Yamada
中科院分区：
文献类型：
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作者：
H. Fukaya;S. Aoki;S. Hashimoto;T. Kaneko;J. Noaki;T. Onogi;N. Yamada
我们用2+1种动力学重叠夸克的晶格QCD对QCD中的手征凝聚态进行了精确计算。在16{3}×48晶格上，上下夸克质量覆盖在3到100 MeV之间，晶格间距约为0.11fm。在最轻的海夸克质量下，晶格上的有限体积系统处于这个区域。通过匹配Dirac算符的低阶本征值谱和手征微扰理论在次前级的预言，我们确定了奇夸克质量固定在其物理值的(2+1)味QCD中的手征凝聚态为Sigma；{MS[over]}(2GeV)=[242(04)(+19/-18)MeV]{3}，其中误差分别是统计的和系统的。
We perform a precise calculation of the chiral condensate in QCD using lattice QCD with 2+1 flavors of dynamical overlap quarks. Up and down quark masses cover a range between 3 and 100 MeV on a 16{3}x48 lattice at a lattice spacing approximately 0.11 fm. At the lightest sea quark mass, the finite volume system on the lattice is in the regime. By matching the low-lying eigenvalue spectrum of the Dirac operator with the prediction of chiral perturbation theory at the next-to-leading order, we determine the chiral condensate in (2+1)-flavor QCD with strange quark mass fixed at its physical value as Sigma;{MS[over ]}(2 GeV)=[242(04)(+19/-18) MeV]{3} where the errors are statistical and systematic, respectively.