V(us) and m(s) from hadronic tau decays.
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.
Gámiz
Elvira
E
Department of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ, United Kingdom.
Jamin
Matthias
M
Pich
Antonio
A
Prades
Joaquim
J
Schwab
Felix
F