A sample of 62249 -pair events is selected from data taken with the ALEPH detector in 1991, 1992 and 1993. The measurement of the branching fractions for 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:Be=1779012(stat)006(syst)(%) andB=1731011(stat)005(syst)(%) . Combined with the most recent ALEPH determination of the lifetime, these results provide a relative measurement of the leptonic couplings in the weak charged current for transverse W bosons:gge=1000200051 andgg=0994300065 .
Tau leptonic branching ratios / D. Buskulic et al.. - In: ZEITSCHRIFT FÜR PHYSIK. C, PARTICLES AND FIELDS. - ISSN 0170-9739. - ELETTRONICO. - 70:(1996), pp. 561-577. [10.1007/s002880050133]
Tau leptonic branching ratios
FOCARDI, ETTORE
1996
Abstract
A sample of 62249 -pair events is selected from data taken with the ALEPH detector in 1991, 1992 and 1993. The measurement of the branching fractions for 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:Be=1779012(stat)006(syst)(%) andB=1731011(stat)005(syst)(%) . Combined with the most recent ALEPH determination of the lifetime, these results provide a relative measurement of the leptonic couplings in the weak charged current for transverse W bosons:gge=1000200051 andgg=0994300065 .
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