A measurement of polarization at LEP

With a data sample of 86 000 Z → τ+τ−(γ) events collected in 1990 through 1993 we have measured the polarization of τ-leptons as a function of the production polar angle using the following 1-prong τ decay modes: r- ~ e-~evT, r- --+/.t-Vuv~, r- ---+ 7r-(K-)v~, r- ~ p-v, and r- ---+ a~'v, We ob...

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Detalles Bibliográficos
Autores principales: Dova, María Teresa, L3 Collaboration
Formato: Articulo
Lenguaje:Inglés
Publicado: 1994
Materias:
Ciencias Exactas
Física
polarization of τ-leptons
production polar angle
axial-vector
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/73620
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-73620
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
polarization of τ-leptons
production polar angle
axial-vector
spellingShingle Ciencias Exactas
Física
polarization of τ-leptons
production polar angle
axial-vector
Dova, María Teresa
L3 Collaboration
A measurement of polarization at LEP
topic_facet Ciencias Exactas
Física
polarization of τ-leptons
production polar angle
axial-vector
description With a data sample of 86 000 Z → τ+τ−(γ) events collected in 1990 through 1993 we have measured the polarization of τ-leptons as a function of the production polar angle using the following 1-prong τ decay modes: r- ~ e-~evT, r- --+/.t-Vuv~, r- ---+ 7r-(K-)v~, r- ~ p-v, and r- ---+ a~'v, We obtain for the ratio of vector to axial-vector weak neutral couplings for electrons gVe/gAe=0.0791±0.0099(stat)±0.0025 (syst) and taus gVτ/gAτ=0.0752±0.0063 (stat)±0.0045 (syst) consistent with the hypothesis of e - τ universality. Assuming universality of the e - τ neutral current we determine the effective electroweak mixing angle to be sin2 θeffw = 0.2309 ± 0.0016..
format Articulo
Articulo
author Dova, María Teresa
L3 Collaboration
author_facet Dova, María Teresa
L3 Collaboration
author_sort Dova, María Teresa
title A measurement of polarization at LEP
title_short A measurement of polarization at LEP
title_full A measurement of polarization at LEP
title_fullStr A measurement of polarization at LEP
title_full_unstemmed A measurement of polarization at LEP
title_sort measurement of polarization at lep
publishDate 1994
url http://sedici.unlp.edu.ar/handle/10915/73620
work_keys_str_mv AT dovamariateresa ameasurementofpolarizationatlep
AT l3collaboration ameasurementofpolarizationatlep
AT dovamariateresa measurementofpolarizationatlep
AT l3collaboration measurementofpolarizationatlep
bdutipo_str Repositorios
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