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Vus and ms from hadronic τ decays -: art. no. 011803

被引：142
作者：
Gámiz, E
Jamin, M
Pich, A
Prades, J
Schwab, F
机构：
[1] Univ Glasgow, Dept Phys & Astron, Glasgow G12 8QQ, Lanark, Scotland
[2] Tech Univ Munich, Dept Phys, D-85748 Garching, Germany
[3] Univ Valencia, IFIC, Dept Fis Teor, CSIC, E-46071 Valencia, Spain
[4] Univ Granada, CAFPE, E-18002 Granada, Spain
[5] Univ Granada, Dept Fis Teor & Cosmos, E-18002 Granada, Spain
[6] Max Planck Inst Phys & Astrophys, Werner Heisenberg Inst, D-80805 Munich, Germany
来源：
PHYSICAL REVIEW LETTERS | 2005年 / 94卷 / 01期
关键词：
D O I：
10.1103/PhysRevLett.94.011803
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Recent experimental results on hadronic tau decays into strange particles by the OPAL Collaboration are employed to determine V-us and m(s) from moments of the invariant mass distribution. Our results are V-us=0.2208+/-0.0034 and m(s)(2 GeV)=81+/-22 MeV. The error on V-us is dominated by experiment and should be improvable in the future. Nevertheless, already now our result is competitive with the standard extraction of V-us from K-e3 decays, and it is compatible with unitarity.
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页数：4
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