Szczegóły publikacji
Opis bibliograficzny
Upper limit for the decay $B^{-} \to \tau^{-}\bar{\nu}_{\tau}$ and measurement of the $b \to \tau\bar{\nu}_{\tau}X$ branching ratio / P. Abreu [et al.], B. MURYN [et al.] // Physics Letters. B, Nuclear Elementary Particle and High-Energy Physics ; ISSN 0370-2693. — 2000 — vol. 496 iss. 1–2, s. 43–58. — Bibliogr. s. 58, Abstr. — Publikacja dostępna online od: 2000-12-18
Autorzy (520)
- AGHMuryn Bogdan
- Abreu Pedro F.
Dane bibliometryczne
| ID BaDAP | 8813 |
|---|---|
| Data dodania do BaDAP | 2002-04-09 |
| Tekst źródłowy | URL |
| DOI | 10.1016/S0370-2693(00)01274-0 |
| Rok publikacji | 2000 |
| Typ publikacji | artykuł w czasopiśmie |
| Otwarty dostęp |  |
| Czasopismo/seria | Physics Letters, B |
Abstract
The branching ratio for the leptonic decay of charged B mesons (B- –> tau (-)<(<nu>)over bar>(tau)) has been measured using selected leptonic tau (-) –> l(-)nu (tau)<(<nu>)over bar>(l) and hadronic tau (-) –> nu X-tau decays in Z –> b (b) over bar decays recorded by DELPHI at LEP1 in 1992-1995. The result, BR(B- –> tau (-)<(<nu>)over bar>(tau)) < 1.1 x 10(-3) at the 90% confidence level, is consistent with standard model expectations and puts a constraint on the ratio tan <beta>/MH+/- < 0.46 (GeV/c(2))(-1) in the framework of models with two Higgs doublets (type II Higgs doublet model). From the missing energy distribution in Z –> b (b) over bar decays without identified leptons, the b –> tau<(<nu>)over bar>X-tau branching ratio has been measured in the hadronic channel tau –> nu X-tau'. The result, BR(b –> tau<(<nu>)over bar>X-tau) = (2.19 +/- 0.24 (stat) +/- 0.39 (syst))%, is consistent with the Standard Model prediction and with previous experimental measurements. (C) 2000 Elsevier Science B.V. All rights reserved.
