Supersymmetry and R$_{b}$ in the light of LEP 1.5

We re-examine the possible magnitude of the supersymmetric contribution to R_b\equiv\Gamma(Z^0\to\bar b b)/\Gamma(Z^0\to{\rm all}) in the light of the constraints imposed by the absence of light charginos at LEP~1.5, implementing also other available phenomenological constraints. We find the supersy...

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Detalles Bibliográficos
Autores principales: Ellis, Jonathan Richard, López, J, Nanopoulos, Dimitri V
Lenguaje:eng
Publicado: 1995
Materias:
Particle Physics - Phenomenology
Acceso en línea:https://dx.doi.org/10.1016/0370-2693(96)00058-5
http://cds.cern.ch/record/292818
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author Ellis, Jonathan Richard
López, J
Nanopoulos, Dimitri V
author_facet Ellis, Jonathan Richard
López, J
Nanopoulos, Dimitri V
author_sort Ellis, Jonathan Richard
collection CERN
description We re-examine the possible magnitude of the supersymmetric contribution to R_b\equiv\Gamma(Z^0\to\bar b b)/\Gamma(Z^0\to{\rm all}) in the light of the constraints imposed by the absence of light charginos at LEP~1.5, implementing also other available phenomenological constraints. We find the supersymmetric contribution to be R^{\rm susy}_b < 0.0017, and discuss the extent to which this upper bound could be strengthened by future constraints on the chargino and top-squark masses. Such values of R^{\rm susy}_b tend to disfavor a supersymmetry explanation of the apparent R_b discrepancy.
id cern-292818
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 1995
record_format invenio
spelling cern-2928182019-09-30T06:29:59Zdoi:10.1016/0370-2693(96)00058-5http://cds.cern.ch/record/292818engEllis, Jonathan RichardLópez, JNanopoulos, Dimitri VSupersymmetry and R$_{b}$ in the light of LEP 1.5Particle Physics - PhenomenologyWe re-examine the possible magnitude of the supersymmetric contribution to R_b\equiv\Gamma(Z^0\to\bar b b)/\Gamma(Z^0\to{\rm all}) in the light of the constraints imposed by the absence of light charginos at LEP~1.5, implementing also other available phenomenological constraints. We find the supersymmetric contribution to be R^{\rm susy}_b < 0.0017, and discuss the extent to which this upper bound could be strengthened by future constraints on the chargino and top-squark masses. Such values of R^{\rm susy}_b tend to disfavor a supersymmetry explanation of the apparent R_b discrepancy.hep-ph/9512288ACT-1995-17CERN-TH-95-314CTP-TAMU-95-46DOE-ER-40717-22oai:cds.cern.ch:2928181995-12-12
spellingShingle Particle Physics - Phenomenology
Ellis, Jonathan Richard
López, J
Nanopoulos, Dimitri V
Supersymmetry and R$_{b}$ in the light of LEP 1.5
title Supersymmetry and R$_{b}$ in the light of LEP 1.5
title_full Supersymmetry and R$_{b}$ in the light of LEP 1.5
title_fullStr Supersymmetry and R$_{b}$ in the light of LEP 1.5
title_full_unstemmed Supersymmetry and R$_{b}$ in the light of LEP 1.5
title_short Supersymmetry and R$_{b}$ in the light of LEP 1.5
title_sort supersymmetry and r$_{b}$ in the light of lep 1.5
topic Particle Physics - Phenomenology
url https://dx.doi.org/10.1016/0370-2693(96)00058-5
http://cds.cern.ch/record/292818
work_keys_str_mv AT ellisjonathanrichard supersymmetryandrbinthelightoflep15
AT lopezj supersymmetryandrbinthelightoflep15
AT nanopoulosdimitriv supersymmetryandrbinthelightoflep15

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