An S matrix analysis of the Z resonance

The S matrix ansatz is a rigorously model independent approach to describe the cross-sections and asymmetries in e+e- annihilation. Using the cross-sections and asymmetries measured with the L3 detector during the 1990 and 1991 running period, we determine the mass and the width of the Z boson, the...

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Detalles Bibliográficos
Autores principales: Dova, María Teresa, L3 Collaboration
Formato: Articulo
Lenguaje:Inglés
Publicado: 1993
Materias:
Ciencias Exactas
Física
Z boson
S matrix
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/81607
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-81607
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
Z boson
S matrix
spellingShingle Ciencias Exactas
Física
Z boson
S matrix
Dova, María Teresa
L3 Collaboration
An S matrix analysis of the Z resonance
topic_facet Ciencias Exactas
Física
Z boson
S matrix
description The S matrix ansatz is a rigorously model independent approach to describe the cross-sections and asymmetries in e+e- annihilation. Using the cross-sections and asymmetries measured with the L3 detector during the 1990 and 1991 running period, we determine the mass and the width of the Z boson, the contributions of the Z exchange and of the yZ interference. Including the polarization of the t lepton in the analysis, the leptonic helicity amplitudes of the scattering process are determined assuming lepton universality. The results are compared with other model independent ansatzes as realized in ZFITTER. A systematic bias of the Z mass due to the yZ interference term is detected, which leads to an underestimation of the error on m<sub>z</sub> for model independent determinations.
format Articulo
Articulo
author Dova, María Teresa
L3 Collaboration
author_facet Dova, María Teresa
L3 Collaboration
author_sort Dova, María Teresa
title An S matrix analysis of the Z resonance
title_short An S matrix analysis of the Z resonance
title_full An S matrix analysis of the Z resonance
title_fullStr An S matrix analysis of the Z resonance
title_full_unstemmed An S matrix analysis of the Z resonance
title_sort s matrix analysis of the z resonance
publishDate 1993
url http://sedici.unlp.edu.ar/handle/10915/81607
work_keys_str_mv AT dovamariateresa ansmatrixanalysisofthezresonance
AT l3collaboration ansmatrixanalysisofthezresonance
AT dovamariateresa smatrixanalysisofthezresonance
AT l3collaboration smatrixanalysisofthezresonance
bdutipo_str Repositorios
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