The $t \to WZb$ decay in the Standard Model: A Critical Reanalysis

We compute the t->WZb decay rate, in the Standard Model, at the leading order in perturbation theory, with special attention to the effects of the finite widths of the W and Z bosons. These effects are extremely important, since the t->WZb decay occurs near its kinematical threshold. They incr...

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Detalles Bibliográficos
Autores principales: Altarelli, Guido, Conti, L., Lubicz, V.
Lenguaje:eng
Publicado: 2000
Materias:
Particle Physics - Phenomenology
Acceso en línea:https://dx.doi.org/10.1016/S0370-2693(00)01333-2
http://cds.cern.ch/record/468246
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author Altarelli, Guido
Conti, L.
Lubicz, V.
author_facet Altarelli, Guido
Conti, L.
Lubicz, V.
author_sort Altarelli, Guido
collection CERN
description We compute the t->WZb decay rate, in the Standard Model, at the leading order in perturbation theory, with special attention to the effects of the finite widths of the W and Z bosons. These effects are extremely important, since the t->WZb decay occurs near its kinematical threshold. They increase the value of the decay rate by orders of magnitude near threshold or allow it below the nominal threshold. We discuss a procedure to take into account the finite-width effects and compare the results with previous studies of this decay. Within the Standard Model, for a top quark mass in the range between 170 and 180 GeV, we find BR(t->WZb) ~ 2 x 10^{-6}, which makes the observation at the LHC very difficult if at all possible.
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institution Organización Europea para la Investigación Nuclear
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spelling cern-4682462023-03-14T18:59:10Zdoi:10.1016/S0370-2693(00)01333-2http://cds.cern.ch/record/468246engAltarelli, GuidoConti, L.Lubicz, V.The $t \to WZb$ decay in the Standard Model: A Critical ReanalysisParticle Physics - PhenomenologyWe compute the t->WZb decay rate, in the Standard Model, at the leading order in perturbation theory, with special attention to the effects of the finite widths of the W and Z bosons. These effects are extremely important, since the t->WZb decay occurs near its kinematical threshold. They increase the value of the decay rate by orders of magnitude near threshold or allow it below the nominal threshold. We discuss a procedure to take into account the finite-width effects and compare the results with previous studies of this decay. Within the Standard Model, for a top quark mass in the range between 170 and 180 GeV, we find BR(t->WZb) ~ 2 x 10^{-6}, which makes the observation at the LHC very difficult if at all possible.We compute the t->WZb decay rate, in the Standard Model, at the leading order in perturbation theory, with special attention to the effects of the finite widths of the W and Z bosons. These effects are extremely important, since the t->WZb decay occurs near its kinematical threshold. They increase the value of the decay rate by orders of magnitude near threshold or allow it below the nominal threshold. We discuss a procedure to take into account the finite-width effects and compare the results with previous studies of this decay. Within the Standard Model, for a top quark mass in the range between 170 and 180 GeV, we find BR(t->WZb) ~ 2 x 10^{-6}, which makes the observation at the LHC very difficult if at all possible.We compute the t → WZb decay rate, in the Standard Model, at the leading order in perturbation theory, with special attention to the effects of the finite widths of the W and Z bosons. These effects are extremely important, since the t → WZb decay occurs near its kinematical threshold. They increase the value of the decay rate by orders of magnitude near threshold or allow it below the nominal threshold. We discuss a procedure to take into account the finite-width effects and compare the results with previous studies of this decay. Within the Standard Model, for a top quark mass in the range between 170 and 180 GeV, we find BR ( t → WZb )≃2×10 −6 , which makes the observation at the LHC very difficult if at all possible.hep-ph/0010090CERN-TH-2000-170RM3-TH-00-12CERN-TH-2000-170RM-3-TH-2000-12oai:cds.cern.ch:4682462000-10-10
spellingShingle Particle Physics - Phenomenology
Altarelli, Guido
Conti, L.
Lubicz, V.
The $t \to WZb$ decay in the Standard Model: A Critical Reanalysis
title The $t \to WZb$ decay in the Standard Model: A Critical Reanalysis
title_full The $t \to WZb$ decay in the Standard Model: A Critical Reanalysis
title_fullStr The $t \to WZb$ decay in the Standard Model: A Critical Reanalysis
title_full_unstemmed The $t \to WZb$ decay in the Standard Model: A Critical Reanalysis
title_short The $t \to WZb$ decay in the Standard Model: A Critical Reanalysis
title_sort $t \to wzb$ decay in the standard model: a critical reanalysis
topic Particle Physics - Phenomenology
url https://dx.doi.org/10.1016/S0370-2693(00)01333-2
http://cds.cern.ch/record/468246
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