Ratio F K / F π in QCD

Ratio F K / F π in QCD
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DOI:
10.1103/physrevd.81.054507
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发表时间:
2010-01
期刊:
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影响因子:
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通讯作者:
S. Durr;Z. Fodor;C. Hoelbling;S. Katz;S. Krieg;T. Kurth;L. Lellouch;Thomas Lippert;À. Ramos;K. Szabó
S. Durr;Z. Fodor;C. Hoelbling;S. Katz;S. Krieg;T. Kurth;L. Lellouch;Thomas Lippert;À. Ramos;K. Szabó
中科院分区:
其他
文献类型:
--
作者:
S. Durr;Z. Fodor;C. Hoelbling;S. Katz;S. Krieg;T. Kurth;L. Lellouch;Thomas Lippert;À. Ramos;K. Szabó

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我们确定的比例FK/F π QCD与Nf = 2 + 1口味的海夸克,基于一系列的晶格计算与三种不同的晶格间距,大体积,和一个模拟的π质量达到约190 MeV。我们得到FK/F π = 1.192(7)stat(6)sys .这个结果然后被用于给出Cabibbo-Kobayashi-Maskawa)矩阵元素的更新值|诉美案|.这个矩阵的第一行的么正关系被发现是很好地观察。
We determine the ratio F K /F π in QCD with N f = 2 + 1 flavors of sea quarks, based on a series of lattice calculations with three different lattice spacings, large volumes, and a simulated pion mass reaching down to about 190 MeV. We obtain F K /F π = 1.192(7) stat (6) sys . This result is then used to give an updated value of the Cabibbo-Kobayashi-Maskawa) matrix element |V us |. The unitarity relation for the first row of this matrix is found to be well observed.