精确的奇异质量比和轻夸克质量的魅力来自完全格点 QCD。
Precise charm to strange mass ratio and light quark masses from full lattice QCD.
机构信息
Department of Physics and Astronomy, University of Glasgow, Glasgow, G12 8QQ, United Kingdom.
出版信息
Phys Rev Lett. 2010 Apr 2;104(13):132003. doi: 10.1103/PhysRevLett.104.132003. Epub 2010 Mar 31.
By using a single formalism to handle charm, strange, and light valence quarks in full lattice QCD for the first time, we are able to determine ratios of quark masses to 1%. For m(c)/m(s) we obtain 11.85(16), an order of magnitude more precise than the current PDG average. Combined with 1% determinations of the charm quark mass now possible this gives m(s)(2 GeV)=92.4(1.5) MeV. The MILC result for m(s)/m(l)=27.2(3) yields m(l)(2 GeV)=3.40(7) MeV for the average of u and d quark masses.
通过首次在全格点 QCD 中使用单一形式来处理魅夸克、奇夸克和轻价夸克，我们能够将夸克质量的比值精确到 1%。对于 m(c)/m(s)，我们得到 11.85(16)，比当前 PDG 平均值精确一个数量级。与目前可能的 1%的魅夸克质量测定相结合，这给出了 m(s)(2 GeV)=92.4(1.5) MeV。MILC 对 m(s)/m(l)=27.2(3)的结果给出了 u 和 d 夸克质量平均值的 m(l)(2 GeV)=3.40(7) MeV。
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