A sample of 62249 τ-pair events is selected from data taken with the ALEPH detector in 1991, 1992 and 1993. The measurement of the branching fractions for τ 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 = 17.79±0.12(stat)±0.06(syst)(%) and Bμ = 17.31±0.11(stat)±0.05(syst)(%). Combined with the most recent. ALEPH determination of the τ lifetime, these results provide a relative measurement of the leptonic couplings in the weak charged current for transverse W bosons: gμ/ge = 1.0002±0.0051 and gτ/gμ = 0.9943±0.0065.

Buskulic, D., Casper, D., Debonis, I., Decamp, D., Ghez, P., Goy, C., et al. (1996). Tau leptonic branching ratios. ZEITSCHRIFT FÜR PHYSIK. C, PARTICLES AND FIELDS, 70(4), 561-577 [10.1007/s002880050133].

Tau leptonic branching ratios

CARPINELLI, Massimo;
1996

Abstract

A sample of 62249 τ-pair events is selected from data taken with the ALEPH detector in 1991, 1992 and 1993. The measurement of the branching fractions for τ 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 = 17.79±0.12(stat)±0.06(syst)(%) and Bμ = 17.31±0.11(stat)±0.05(syst)(%). Combined with the most recent. ALEPH determination of the τ lifetime, these results provide a relative measurement of the leptonic couplings in the weak charged current for transverse W bosons: gμ/ge = 1.0002±0.0051 and gτ/gμ = 0.9943±0.0065.
Articolo in rivista - Articolo scientifico
Physics
English
561
577
17
Buskulic, D., Casper, D., Debonis, I., Decamp, D., Ghez, P., Goy, C., et al. (1996). Tau leptonic branching ratios. ZEITSCHRIFT FÜR PHYSIK. C, PARTICLES AND FIELDS, 70(4), 561-577 [10.1007/s002880050133].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/390211
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