Precise determination of |V(us)| from lattice calculations of pseudoscalar decay constants.
Precise determination of |V(us)| from lattice calculations of pseudoscalar decay constants.
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DOI：
10.1103/physrevlett.93.231803
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发表时间：
2004-02
影响因子：
8.6
通讯作者：
W. Marciano
中科院分区：
文献类型：
--
作者：
W. Marciano
结合实验的K介子和π介子衰变宽度的比值γ（K-->munu（mu）（gamma））/γ（pi-->munu（mu）（gamma））和最近的格点规范理论计算的f（K）/f（pi），给出了Cabibbo-Kobayashi-Maskawa夸克混合矩阵元的精确值|V（us）|=0.2219（25）或假设三代么正性|V（us）|=0.222 1（24）。比较与其他确定的基本参数，影响，并展望未来的改进。
Combining the ratio of experimental kaon and pion decay widths, Gamma(K-->munu (mu)(gamma))/Gamma(pi-->munu (mu)(gamma)), with a recent lattice gauge theory calculation of f(K)/f(pi) provides a precise value for the Cabibbo-Kobayashi-Maskawa quark mixing matrix element |V(us)|=0.2219(25) or if three generation unitarity is assumed |V(us)|=0.222 1(24). Comparison with other determinations of that fundamental parameter, implications, and an outlook for future improvements are given.