Measurement of the τ- → e-v̄cvτ branching ratio

G Alexander; J Allison; N Altekamp; K Ametewee; KJ Anderson; S Anderson; S Arcelli; S Asai; D Axen; G Azuelos; AH Ball; E Barberio; RJ Barlow; R Bartoldus; JR Batley; G Beaudoin; J Bechtluft; GA Beck; C Beeston; T Behnke; AN Bell; KW Bell; G Bella; S Bentvelsen; P Berlich; S Bethke; O Biebel; IJ Bloodworth; JE Bloomer; P Bock; HM Bosch; M Boutemeur; BT Bouwens; S Braibant; P Bright-Thomas; RM Brown; HJ Burckhart; C Burgard; R Bürgin; P Capiluppi; RK Carnegie; AA Carter; JR Carter; CY Chang; C Charlesworth; DG Charlton; D Chrisman; SL Chu; PEL Clarke; SG Clowes; I Cohen; JE Conboy; OC Cooke; M Cuffiani; S Dado; C Dallapiccola; GM Dallavalle; C Darling; S de Jong; LA del Pozo; MS Dixit; E do Couto e Silva; E Duchovni; G Duckeck; IP Duerdoth; UC Dunwoody; JEG Edwards; PG Estabrooks; HG Evans; F Fabbri; B Fabbro; P Fath; F Fiedler; M Fierro; M Fincke-Keeler; HM Fischer; R Folman; DG Fong; M Foucher; H Fukui; A Fürtjes; P Gagnon; A Gaidot; JW Gary; J Gascon; SM Gascon-Shotkin; NI Geddes; C Geich-Gimbel; SW Gensler; FX Gentit; T Geralis; G Giacomelli; P Giacomelli; R Giacomelli; V Gibson; WR Gibson; DM Gingrich; J Goldberg; MJ Goodrick; W Gorn

Journal article

Measurement of the τ- → e-v̄cvτ branching ratio

G Alexander, J Allison, N Altekamp, K Ametewee, KJ Anderson, S Anderson, S Arcelli, S Asai, D Axen, G Azuelos, AH Ball, E Barberio, RJ Barlow, R Bartoldus, JR Batley, G Beaudoin, J Bechtluft, GA Beck, C Beeston, T Behnke Show all

Physics Letters Section B Nuclear Elementary Particle and High Energy Physics | ELSEVIER SCIENCE BV | Published : 1996

DOI: 10.1016/0370-2693(95)01600-7

Abstract

The branching ratio of the τ- → e-v̄evτ decay mode has been measured with the OPAL detector to be (17.78 ± 0.10 ±0.09)% where the first error is statistical and the second is systematic. The branching ratio, together with other measurements, has been used to test e - μ and μ - τ universality in the charged current weak interaction.