V_us and m_s from hadronic tau decays

Preprint

3 August 2004

preprint
Published by arXiv in arXiv

https://doi.org/10.48550/arXiv.hep-ph/0408044

Abstract

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 to the standard extraction of V_us from K_e3 decays, and it is compatible with unitarity.

Keywords

HADRONIC TAU DECAYS
V_US AND M_S
TAU DECAYS
EXTRACTION
OPAL

All Related Versions

Version 1, 2004-08-03, ArXiv
Published version: Physical Review Letters, 94 (1), 011803.

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