$τ$ Leptonic Branching Ratios and a Search for Goldstone-Boson Decay

Publisher Website

28 October 1985

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

Vol. 55 (18) , 1842-1845
https://doi.org/10.1103/physrevlett.55.1842

Abstract

Pairs of

τ

leptons produced at

\sqrt{s} = 3.77

GeV have been studied in

e μ

,

ee

, and

μ μ

final states. The leptonic branching ratios have been measured to be

B (τ \to e ν ν) = (18.2 \pm 0.7 \pm 0.5) %

and

B (τ \to μ ν ν) = (18.0 \pm 1.0 \pm 0.6) %

. Limits have been set for the two-body decays

τ \to eG

and

τ \to μ G

, where

G

is a light Goldstone boson.

Keywords

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