V_us and m_s from hadronic tau decays
High Energy Physics - Phenomenology
2008-11-26 v1 High Energy Physics - Experiment
High Energy Physics - Lattice
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
Cite
@article{arxiv.hep-ph/0408044,
title = {V_us and m_s from hadronic tau decays},
author = {E. Gamiz and M. Jamin and A. Pich and J. Prades and F. Schwab},
journal= {arXiv preprint arXiv:hep-ph/0408044},
year = {2008}
}
Comments
4 pages, 1 figure