Measurement of W-pair cross sections in e+e− interactions at √s = 172 GeV and W-decay branching fractions

We report on the measurement of W-boson pair-production with the L3 detector at LEP at an average centre-of-mass energy of 172.13 GeV. In a data sample corresponding to a total luminosity of 10.25 pb<sup>−1</sup> we select 110 four-fermion events with pairs of hadronic jets or leptons wi...

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Detalles Bibliográficos
Autores principales: Dova, María Teresa, L3 Collaboration
Formato: Articulo
Lenguaje:Inglés
Publicado: 1997
Materias:
Ciencias Exactas
Física
w boson
L3 detector
la̵rge hadron collider
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/80450
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-80450
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
w boson
L3 detector
la̵rge hadron collider
spellingShingle Ciencias Exactas
Física
w boson
L3 detector
la̵rge hadron collider
Dova, María Teresa
L3 Collaboration
Measurement of W-pair cross sections in e+e− interactions at √s = 172 GeV and W-decay branching fractions
topic_facet Ciencias Exactas
Física
w boson
L3 detector
la̵rge hadron collider
description We report on the measurement of W-boson pair-production with the L3 detector at LEP at an average centre-of-mass energy of 172.13 GeV. In a data sample corresponding to a total luminosity of 10.25 pb<sup>−1</sup> we select 110 four-fermion events with pairs of hadronic jets or leptons with high invariant masses. Branching fractions of W decays into different fermion-antifermion pairs are determined with and without the assumption of charged-current lepton universality. The branching fraction for hadronic W decays is measured to be: B(W → hadrons) = 64.2<sup>+3.7</sup><sub>−3.8</sub> (stat.) ± 0.5 (syst.) %. Combining all final states the total cross section for W-pair production is measured to be: σ<sub>WW</sub> = 12.27<sup>+1.41</sup><sub>−1.32</sub> (stat.) ± 0.23 (syst.) pb. The results are in good agreement with the Standard Model.
format Articulo
Articulo
author Dova, María Teresa
L3 Collaboration
author_facet Dova, María Teresa
L3 Collaboration
author_sort Dova, María Teresa
title Measurement of W-pair cross sections in e+e− interactions at √s = 172 GeV and W-decay branching fractions
title_short Measurement of W-pair cross sections in e+e− interactions at √s = 172 GeV and W-decay branching fractions
title_full Measurement of W-pair cross sections in e+e− interactions at √s = 172 GeV and W-decay branching fractions
title_fullStr Measurement of W-pair cross sections in e+e− interactions at √s = 172 GeV and W-decay branching fractions
title_full_unstemmed Measurement of W-pair cross sections in e+e− interactions at √s = 172 GeV and W-decay branching fractions
title_sort measurement of w-pair cross sections in e+e− interactions at √s = 172 gev and w-decay branching fractions
publishDate 1997
url http://sedici.unlp.edu.ar/handle/10915/80450
work_keys_str_mv AT dovamariateresa measurementofwpaircrosssectionsineeinteractionsats172gevandwdecaybranchingfractions
AT l3collaboration measurementofwpaircrosssectionsineeinteractionsats172gevandwdecaybranchingfractions
bdutipo_str Repositorios
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