Szczegóły publikacji
Opis bibliograficzny
A measurement of the $\tau$ leptonic branching fractions / P. Abreu [et al.], W. KUCEWICZ, K. Kurvinen [et al.] // Physics Letters. B, Nuclear Elementary Particle and High-Energy Physics ; ISSN 0370-2693. — 1995 — vol. 357 iss. 4, s. 715–724. — Bibliogr. s. 724, Abstr.
Autorzy (542)
- AGHKucewicz Wojciech
- Abreu Pedro F.
Dane bibliometryczne
| ID BaDAP | 22100 |
|---|---|
| Data dodania do BaDAP | 2005-05-10 |
| DOI | 10.1016/0370-2693(95)00987-V |
| Rok publikacji | 1995 |
| Typ publikacji | artykuł w czasopiśmie |
| Otwarty dostęp | |
| Czasopismo/seria | Physics Letters, B |
Abstract
A sample of 25000 Z(0) –> tau(-)tau(+) events collected by the DELPHI experiment at LEP in 1991 and 1992 is used to measure the leptonic branching fractions of the tau lepton. The results are B(tau –> e nu<(nu)over bar>) = (17.51+/-0.39)% and B(tau –> mu nu<(nu)over bar>) = (17.02+/-0.31)%. The ratio of the muon and electron couplings to the weak charged current is measured to be g(mu)/g(e) = 1.000+/-0.013, satisfying e-mu universality. The average leptonic branching fraction corrected to the value for a massless lepton, assuming e-mu universality, is found to be B(tau –> l nu<(nu)over bar>) = (17.50+/-0.25)%.