Yukawa structure, flavour changing and CP violation in Supergravity

The hierarchical structure of fermion masses and mixings strongly suggests an underlying family symmetry. In supergravity any familon field spontaneously breaking this symmetry necessarily acquires an F-term which contributes to the soft trilinear couplings. We show, as a result, mu -> e gamma de...

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Detalles Bibliográficos
Autores principales: Ross, Graham G, Vives, O
Lenguaje:eng
Publicado: 2002
Materias:
Acceso en línea:https://dx.doi.org/10.1103/PhysRevD.67.095013
http://cds.cern.ch/record/592064
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author Ross, Graham G
Vives, O
author_facet Ross, Graham G
Vives, O
author_sort Ross, Graham G
collection CERN
description The hierarchical structure of fermion masses and mixings strongly suggests an underlying family symmetry. In supergravity any familon field spontaneously breaking this symmetry necessarily acquires an F-term which contributes to the soft trilinear couplings. We show, as a result, mu -> e gamma decay can receive large contributions from this source at the level of current experimental bounds and thus this channel may provide the first indication of supersymmetry and a clue to the structure of the soft breaking sector. Using the mercury EDM bounds we find strong bounds on the right handed down quark mixing angles that are inconsistent with models relating them to neutrino mixing angles and favour a near-symmetric form for the magnitude of the down quark mass matrix.
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spelling cern-5920642019-09-30T06:29:59Zdoi:10.1103/PhysRevD.67.095013http://cds.cern.ch/record/592064engRoss, Graham GVives, OYukawa structure, flavour changing and CP violation in SupergravityParticle Physics - PhenomenologyThe hierarchical structure of fermion masses and mixings strongly suggests an underlying family symmetry. In supergravity any familon field spontaneously breaking this symmetry necessarily acquires an F-term which contributes to the soft trilinear couplings. We show, as a result, mu -> e gamma decay can receive large contributions from this source at the level of current experimental bounds and thus this channel may provide the first indication of supersymmetry and a clue to the structure of the soft breaking sector. Using the mercury EDM bounds we find strong bounds on the right handed down quark mixing angles that are inconsistent with models relating them to neutrino mixing angles and favour a near-symmetric form for the magnitude of the down quark mass matrix.hep-ph/0211279CERN-TH-2002-335OUTP-2002-42-Poai:cds.cern.ch:5920642002-11-18
spellingShingle Particle Physics - Phenomenology
Ross, Graham G
Vives, O
Yukawa structure, flavour changing and CP violation in Supergravity
title Yukawa structure, flavour changing and CP violation in Supergravity
title_full Yukawa structure, flavour changing and CP violation in Supergravity
title_fullStr Yukawa structure, flavour changing and CP violation in Supergravity
title_full_unstemmed Yukawa structure, flavour changing and CP violation in Supergravity
title_short Yukawa structure, flavour changing and CP violation in Supergravity
title_sort yukawa structure, flavour changing and cp violation in supergravity
topic Particle Physics - Phenomenology
url https://dx.doi.org/10.1103/PhysRevD.67.095013
http://cds.cern.ch/record/592064
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