Excited Fermion Contribution to Z Physics at One Loop

We investigate the effects induced by excited leptons at the one-loop level in the observables measured on the $Z$ peak at LEP. Using a general effective Lagrangian approach to describe the couplings of the excited leptons, we compute their contributions to both oblique parameters and $Z$ partial wi...

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Detalles Bibliográficos
Autores principales: Gonzalez-Garcia, M.C., Novaes, S.F.
Lenguaje:eng
Publicado: 1996
Materias:
Particle Physics - Phenomenology
Acceso en línea:https://dx.doi.org/10.1016/S0550-3213(96)00651-7
http://cds.cern.ch/record/308663
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author Gonzalez-Garcia, M.C.
Novaes, S.F.
author_facet Gonzalez-Garcia, M.C.
Novaes, S.F.
author_sort Gonzalez-Garcia, M.C.
collection CERN
description We investigate the effects induced by excited leptons at the one-loop level in the observables measured on the $Z$ peak at LEP. Using a general effective Lagrangian approach to describe the couplings of the excited leptons, we compute their contributions to both oblique parameters and $Z$ partial widths. Our results show that the new effects are comparable to the present experimental sensitivity, but they do not lead to a significant improvement on the available constraints on the couplings and masses of these states.
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institution Organización Europea para la Investigación Nuclear
language eng
publishDate 1996
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spelling cern-3086632023-04-03T08:21:47Zdoi:10.1016/S0550-3213(96)00651-7http://cds.cern.ch/record/308663engGonzalez-Garcia, M.C.Novaes, S.F.Excited Fermion Contribution to Z Physics at One LoopParticle Physics - PhenomenologyWe investigate the effects induced by excited leptons at the one-loop level in the observables measured on the $Z$ peak at LEP. Using a general effective Lagrangian approach to describe the couplings of the excited leptons, we compute their contributions to both oblique parameters and $Z$ partial widths. Our results show that the new effects are comparable to the present experimental sensitivity, but they do not lead to a significant improvement on the available constraints on the couplings and masses of these states.We investigate the effects induced by excited leptons at the one-loop level in the observables measured on the $Z$ peak at LEP. Using a general effective Lagrangian approach to describe the couplings of the excited leptons, we compute their contributions to both oblique parameters and $Z$ partial widths. Our results show that the new effects are comparable to the present experimental sensitivity, but they do not lead to a significant improvement on the available constraints on the couplings and masses of these states.We investigate the effects induced by excited leptons at the one-loop level in the observables measured on the $Z$ peak at LEP. Using a general effective Lagrangian approach to describe the couplings of the excited leptons, we compute their contributions to both oblique parameters and $Z$ partial widths. Our results show that the new effects are comparable to the present experimental sensitivity, but they do not lead to a significant improvement on the available constraints on the couplings and masses of these states.We investigate the effects induced by excited leptons at the one-loop level in the observables measured on the Z peak at LEP. Using a general effective Lagrangian approach to describe the couplings of the excited leptons, we compute their contributions to both oblique parameters and Z partial widths. Our results show that the new effects are comparable to the present experimental sensitivity, but they do not lead to a significant improvement on the available constraints on the couplings and masses of these states.hep-ph/9608309CERN-TH-96-123IFT-P-013-96CERN-TH-96-123IFT-P-96-13oai:cds.cern.ch:3086631996-08-13
spellingShingle Particle Physics - Phenomenology
Gonzalez-Garcia, M.C.
Novaes, S.F.
Excited Fermion Contribution to Z Physics at One Loop
title Excited Fermion Contribution to Z Physics at One Loop
title_full Excited Fermion Contribution to Z Physics at One Loop
title_fullStr Excited Fermion Contribution to Z Physics at One Loop
title_full_unstemmed Excited Fermion Contribution to Z Physics at One Loop
title_short Excited Fermion Contribution to Z Physics at One Loop
title_sort excited fermion contribution to z physics at one loop
topic Particle Physics - Phenomenology
url https://dx.doi.org/10.1016/S0550-3213(96)00651-7
http://cds.cern.ch/record/308663
work_keys_str_mv AT gonzalezgarciamc excitedfermioncontributiontozphysicsatoneloop
AT novaessf excitedfermioncontributiontozphysicsatoneloop

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