Leptonic decays of the Ds meson

Preprint

15 January 2002

preprint
Published by arXiv in arXiv

https://doi.org/10.48550/arXiv.hep-ex/0201024

Abstract

The purely leptonic decays Ds -> tau nu and Ds -> mu nu are studied in a sample of four million hadronic Z decays collected with the ALEPH detector at the LEP e+e- collider from 1991 to 1995. The branching fractions are extracted from a combination of two analyses, one optimized to select Ds -> tau nu decays with tau -> e nu nubar or mu nu nubar, and the other optimized for Ds-> mu nu decays. The results are used to evaluate the Ds decay constant, within the Standard Model: fDs = [285 +- 19(stat) +- 40 (syst)] MeV

Keywords

LEPTONIC DECAYS
STANDARD MODEL
DS DECAY
TAU NU
MESON
MU NU

All Related Versions

Version 1, 2002-01-15, ArXiv
Published version: Physics Letters B, 528 (1-2), 1.

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