Szczegóły publikacji
Opis bibliograficzny
A measurement of the $\tau^{-}\to e^{-}øverline{\nu}_{e}\nu_{\tau}$ branching ratio / G. Abbiendi, [et al.], M. Przybycień, [et al.] // Physics Letters. B, Nuclear Elementary Particle and High-Energy Physics ; ISSN 0370-2693. — 1999 — vol. 447 iss. 1–2, s. 134–146. — Bibliogr. s. 145–146, Abstr. — M. Przybycień – afiliacja: CERN, European Organisation for Particle Physics
Autorzy (120)
- Abbiendi Giovanni
- Przybycień Mariusz
Dane bibliometryczne
| ID BaDAP | 2731 |
|---|---|
| Data dodania do BaDAP | 2001-04-18 |
| Tekst źródłowy | URL |
| DOI | 10.1016/S0370-2693(98)01553-6 |
| Rok publikacji | 1999 |
| Typ publikacji | artykuł w czasopiśmie |
| Otwarty dostęp |  |
| Czasopismo/seria | Physics Letters, B |
Abstract
The branching ratio for the decay tau(-) –> e(-) <(nu)over bar>(e)nu(tau) has been measured using Z(0) decay data collected by the OPAL experiment at LEP. In total 33 073 tau(-) –> e(-) <(nu)over bar>(e)nu(tau) candidates were identified from a sample of 186 197 selected tau. decays, giving a branching ratio of B(tau(-) –> e(-) <(nu)over bar>(e)nu(tau)) = (17.81 +/- 0.09 (stat) +/- 0.06 (syst))%. This result is combined with other measurements to test e - mu and mu - tau universality in charged-current weak interactions. Additionally, the strong coupling constant alpha(s)(m(tau)(2)) has been extracted from B(tau(-) –> e(-) <(nu)over bar>(e)nu(tau)) and evolved to the Z(0) mass scale, giving alpha(s)(m(Z)(2)) = 0.1204 +/- 0.0011 (exp) +/- 0.0019 (theory).
