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.

引用

页数：4

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