Tau leptonic branching ratios

Buskulic, D. and Finch, Alexander (1996) Tau leptonic branching ratios. Zeitschrift für Physik C Particles and Fields, 70 (4). pp. 561-577. ISSN 0170-9739

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Abstract

A sample of 62249 tau-pair events is selected from data taken with the ALEPH detector in 1991, 1992 and 1993. The measurement of the branching fractions for tau decays into electrons and muons is presented with emphasis on the study of systematic effects from selection, particle identification and decay classification. The results obtained are: B-e=17.79+/-0.12(stat)+/-0.06(syst)(%) and B-mu=17.31+/-0.11(stat)+/-0.05(syst)(%). Combined with the most recent ALEPH determination of the tau lifetime, these results provide a relative measurement of the leptonic couplings in the weak charged current for transverse W bosons: g(mu)/g(e)=1.0002+/-0.0051 and g(tau)/g(mu)=0.9943+/-0.0065.

Item Type:
Journal Article
Journal or Publication Title:
Zeitschrift für Physik C Particles and Fields
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/3100/3101
Subjects:
ID Code:
64061
Deposited By:
Deposited On:
14 May 2013 14:09
Refereed?:
Yes
Published?:
Published
Last Modified:
15 Jul 2020 03:56