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Proton Stability In Supersymmetric SU(5)

We discuss the issue of proton stability within supersymmetric SU(5) GUT and suggest mechanisms for suppression of baryon number violating dimension five and six operators. The mechanism is based on the idea of split multiplets (i.e. quarks and leptons are not coming from a single GUT multiplet) whi...

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Autor principal: Tavartkiladze, Z
Lenguaje:eng
Publicado: 2006
Materias:
Acceso en línea:https://dx.doi.org/10.1103/PhysRevD.76.055012
http://cds.cern.ch/record/993739
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author Tavartkiladze, Z
author_facet Tavartkiladze, Z
author_sort Tavartkiladze, Z
collection CERN
description We discuss the issue of proton stability within supersymmetric SU(5) GUT and suggest mechanisms for suppression of baryon number violating dimension five and six operators. The mechanism is based on the idea of split multiplets (i.e. quarks and leptons are not coming from a single GUT multiplet) which is realized by an extension with additional vector-like matter. The construction naturally avoids wrong asymptotic mass relations $\hat{M}_D=\hat{M}_E$. Thus, the long standing problems of the minimal SUSY SU(5) GUT are resolved. On a particular example we show that the considered scenario is compatible with a perturbative gauge coupling unification, and nucleon's (dominant) decay arise through $d=6$ operators with $\tau (p\to \pi^0e^+)\simeq 4.8\cdot 10^{33}$ yrs. The decays through $d=5$ operators give the characteristic signature $\tau (p\to K^+\nu_e)\simeq 0.7\tau (p\to K^0\mu^+) \simeq 1.3\cdot 10^{34}(\sin 2\bt/0.5)^2$ yrs.
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institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2006
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spelling cern-9937392019-09-30T06:29:59Zdoi:10.1103/PhysRevD.76.055012http://cds.cern.ch/record/993739engTavartkiladze, ZProton Stability In Supersymmetric SU(5)Particle Physics - PhenomenologyWe discuss the issue of proton stability within supersymmetric SU(5) GUT and suggest mechanisms for suppression of baryon number violating dimension five and six operators. The mechanism is based on the idea of split multiplets (i.e. quarks and leptons are not coming from a single GUT multiplet) which is realized by an extension with additional vector-like matter. The construction naturally avoids wrong asymptotic mass relations $\hat{M}_D=\hat{M}_E$. Thus, the long standing problems of the minimal SUSY SU(5) GUT are resolved. On a particular example we show that the considered scenario is compatible with a perturbative gauge coupling unification, and nucleon's (dominant) decay arise through $d=6$ operators with $\tau (p\to \pi^0e^+)\simeq 4.8\cdot 10^{33}$ yrs. The decays through $d=5$ operators give the characteristic signature $\tau (p\to K^+\nu_e)\simeq 0.7\tau (p\to K^0\mu^+) \simeq 1.3\cdot 10^{34}(\sin 2\bt/0.5)^2$ yrs.hep-ph/0610394CERN-PH-TH-2006-195OSU-HEP-06-8oai:cds.cern.ch:9937392006-10-29
spellingShingle Particle Physics - Phenomenology
Tavartkiladze, Z
Proton Stability In Supersymmetric SU(5)
title Proton Stability In Supersymmetric SU(5)
title_full Proton Stability In Supersymmetric SU(5)
title_fullStr Proton Stability In Supersymmetric SU(5)
title_full_unstemmed Proton Stability In Supersymmetric SU(5)
title_short Proton Stability In Supersymmetric SU(5)
title_sort proton stability in supersymmetric su(5)
topic Particle Physics - Phenomenology
url https://dx.doi.org/10.1103/PhysRevD.76.055012
http://cds.cern.ch/record/993739
work_keys_str_mv AT tavartkiladzez protonstabilityinsupersymmetricsu5