Upper Bound of Proton Life-Time in Product-Group Unification

Models of supersymmetric grand unified theories based on SU(5)_GUT \times U(N)_H gauge group (N = 2,3) have a symmetry that guarantees light two Higgs doublets and absence of dimension-five proton decay operators. We analysed the proton decay induced by gauge-boson exchange in the models. Upper boun...

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Detalles Bibliográficos
Autores principales: Ibe, Masahiro, Watari, T.
Lenguaje:eng
Publicado: 2003
Materias:
Particle Physics - Phenomenology
Acceso en línea:https://dx.doi.org/10.1103/PhysRevD.67.114021
http://cds.cern.ch/record/609169
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author Ibe, Masahiro
Watari, T.
author_facet Ibe, Masahiro
Watari, T.
author_sort Ibe, Masahiro
collection CERN
description Models of supersymmetric grand unified theories based on SU(5)_GUT \times U(N)_H gauge group (N = 2,3) have a symmetry that guarantees light two Higgs doublets and absence of dimension-five proton decay operators. We analysed the proton decay induced by gauge-boson exchange in the models. Upper bounds of proton life-time are obtained; \tau(p\to \pi^0e^+) \lsim 6.0 \times 10^{33} yrs. in the SU(5)_GUT \times U(2)_H model and \tau(p\to \pi^0e^+) \lsim 5.3 \times 10^{35} yrs. in the SU(5)_GUT \times U(3)_H model. Various uncertainties in the predictions are also discussed.
id cern-609169
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2003
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spelling cern-6091692023-03-14T20:38:34Zdoi:10.1103/PhysRevD.67.114021http://cds.cern.ch/record/609169engIbe, MasahiroWatari, T.Upper Bound of Proton Life-Time in Product-Group UnificationParticle Physics - PhenomenologyModels of supersymmetric grand unified theories based on SU(5)_GUT \times U(N)_H gauge group (N = 2,3) have a symmetry that guarantees light two Higgs doublets and absence of dimension-five proton decay operators. We analysed the proton decay induced by gauge-boson exchange in the models. Upper bounds of proton life-time are obtained; \tau(p\to \pi^0e^+) \lsim 6.0 \times 10^{33} yrs. in the SU(5)_GUT \times U(2)_H model and \tau(p\to \pi^0e^+) \lsim 5.3 \times 10^{35} yrs. in the SU(5)_GUT \times U(3)_H model. Various uncertainties in the predictions are also discussed.Models of supersymmetric grand unified theories based on SU(5)_GUT \times U(N)_H gauge group (N = 2,3) have a symmetry that guarantees light Higgs doublets and absence of dimension-five proton decay operators. We analysed the proton decay induced by gauge-boson exchange in the models. Upper bounds of proton lifetime are obtained: \tau(p\to \pi^0e^+) \lsim 6.0 \times 10^{33} yrs in the SU(5)_GUT \times U(2)_H model and \tau(p\to \pi^0e^+) \lsim 5.3 \times 10^{35} yrs in the SU(5)_GUT \times U(3)_H model. Various uncertainties in the predictions are also discussed.hep-ph/0303123CERN-TH-2003-059UT-03-09CERN-TH-2003-059UT-2003-09oai:cds.cern.ch:6091692003-03-14
spellingShingle Particle Physics - Phenomenology
Ibe, Masahiro
Watari, T.
Upper Bound of Proton Life-Time in Product-Group Unification
title Upper Bound of Proton Life-Time in Product-Group Unification
title_full Upper Bound of Proton Life-Time in Product-Group Unification
title_fullStr Upper Bound of Proton Life-Time in Product-Group Unification
title_full_unstemmed Upper Bound of Proton Life-Time in Product-Group Unification
title_short Upper Bound of Proton Life-Time in Product-Group Unification
title_sort upper bound of proton life-time in product-group unification
topic Particle Physics - Phenomenology
url https://dx.doi.org/10.1103/PhysRevD.67.114021
http://cds.cern.ch/record/609169
work_keys_str_mv AT ibemasahiro upperboundofprotonlifetimeinproductgroupunification
AT watarit upperboundofprotonlifetimeinproductgroupunification

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