$V_{u s}$ and $m_{s}$ from Hadronic $τ$ Decays

13 January 2005

journal article
research article
Published by American Physical Society (APS) in Physical Review Letters

Vol. 94 (1) , 011803
https://doi.org/10.1103/physrevlett.94.011803

Abstract

Recent experimental results on hadronic

τ

decays into strange particles by the OPAL Collaboration are employed to determine

V_{u s}

and

m_{s}

from moments of the invariant mass distribution. Our results are

V_{u s} = 0.2208 \pm 0.0034

and

m_{s} (2 G e V) = 81 \pm 22 M e V

. The error on

V_{u s}

is dominated by experiment and should be improvable in the future. Nevertheless, already now our result is competitive with the standard extraction of

V_{u s}

from

K_{e 3}

decays, and it is compatible with unitarity.

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This publication has 45 references indexed in Scilit:

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Vusandmsfrom HadronicτDecays

Abstract

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$V_{u s}$ and $m_{s}$ from Hadronic $τ$ Decays