Measurement of the tau branching fractions into leptons

Using data collected with the L3 detector near the Z resonance, corresponding to an integrated luminosity of 150 pb−1, the branching fractions of the tau lepton into electron and muon are measured to be B(τ → eν ̄eντ ) = (17.806 ± 0.104 (stat.) ± 0.076 (syst.))%, B(τ → μν ̄μντ ) = (17.342±0.110 (sta...

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Detalles Bibliográficos
Autores principales: Dova, María Teresa, L3 Collaboration
Formato: Articulo
Lenguaje:Inglés
Publicado: 2001
Materias:
Ciencias Exactas
Física
L3 detector
tau lepton
electron and muon
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/75889
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-75889
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Exactas
Física
L3 detector
tau lepton
electron and muon
spellingShingle Ciencias Exactas
Física
L3 detector
tau lepton
electron and muon
Dova, María Teresa
L3 Collaboration
Measurement of the tau branching fractions into leptons
topic_facet Ciencias Exactas
Física
L3 detector
tau lepton
electron and muon
description Using data collected with the L3 detector near the Z resonance, corresponding to an integrated luminosity of 150 pb−1, the branching fractions of the tau lepton into electron and muon are measured to be B(τ → eν ̄eντ ) = (17.806 ± 0.104 (stat.) ± 0.076 (syst.))%, B(τ → μν ̄μντ ) = (17.342±0.110 (stat.)±0.067 (syst.))%. From these results the ratio of the charged current coupling constants of the muon and the electron is determined to be gμ/ge = 1.0007 ± 0.0051. Assuming electron-muon universality, the Fermi constant is measured in tau lepton decays as GF = (1.1616± 0.0058) × 10−5 GeV−2. Furthermore, the coupling constant of the strong interaction at the tau mass scale is obtained as αs(m2 τ ) = 0.322 ± 0.009 (exp.) ± 0.015 (theory).
format Articulo
Articulo
author Dova, María Teresa
L3 Collaboration
author_facet Dova, María Teresa
L3 Collaboration
author_sort Dova, María Teresa
title Measurement of the tau branching fractions into leptons
title_short Measurement of the tau branching fractions into leptons
title_full Measurement of the tau branching fractions into leptons
title_fullStr Measurement of the tau branching fractions into leptons
title_full_unstemmed Measurement of the tau branching fractions into leptons
title_sort measurement of the tau branching fractions into leptons
publishDate 2001
url http://sedici.unlp.edu.ar/handle/10915/75889
work_keys_str_mv AT dovamariateresa measurementofthetaubranchingfractionsintoleptons
AT l3collaboration measurementofthetaubranchingfractionsintoleptons
bdutipo_str Repositorios
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