Precision computation of the strange quark's mass in quenched QCD
Precision computation of the strange quark's mass in quenched QCD
复制标题
淬灭QCD中奇异夸克质量的精确计算
DOI:
10.1016/s0550-3213(99)00714-2
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发表时间:
1999
期刊:
影响因子:
--
通讯作者:
H. Wittig
中科院分区:
文献类型:
--
作者:
J. Garden;J. Heitger;R. Sommer;H. Wittig
We determine the renormalization group invariant quark mass corresponding to the sum of the strange and the average light quark mass in the quenched approximation of QCD, using as essential input the mass of the K-mesons. In the continuum limit we find (Ms+ M ̂ )/FK=0.874(29) , which includes systematic errors. Translating this non-perturbative result into the running quark masses in the MS scheme at μ=2 GeV and using the quark mass ratios from chiral perturbation theory, we obtain ms(2 GeV )=97(4) MeV . With the help of recent results by the CP-PACS Collaboration, we estimate that a 10% higher value would be obtained if one replaced FKby the nucleon mass to set the scale. This is a typical ambiguity in the quenched approximation.