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Flavor Alignment via Shining in RS

We present a class of warped extra dimensional models whose flavor violating interactions are much suppressed compared to the usual anarchic case due to flavor alignment. Such suppression can be achieved in models where part of the global flavor symmetry is gauged in the bulk and broken in a control...

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Autores principales: Csáki, Csaba, Perez, Gilad, Surujon, Ze'ev, Weiler, Andreas
Lenguaje:eng
Publicado: 2009
Materias:
Acceso en línea:https://dx.doi.org/10.1103/PhysRevD.81.075025
http://cds.cern.ch/record/1187900
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author Csáki, Csaba
Perez, Gilad
Surujon, Ze'ev
Weiler, Andreas
author_facet Csáki, Csaba
Perez, Gilad
Surujon, Ze'ev
Weiler, Andreas
author_sort Csáki, Csaba
collection CERN
description We present a class of warped extra dimensional models whose flavor violating interactions are much suppressed compared to the usual anarchic case due to flavor alignment. Such suppression can be achieved in models where part of the global flavor symmetry is gauged in the bulk and broken in a controlled manner. We show that the bulk masses can be aligned with the down type Yukawa couplings by an appropriate choice of bulk flavon field representations and TeV brane dynamics. This alignment could reduce the flavor violating effects to levels which allow for a Kaluza-Klein scale as low as 2-3 TeV, making the model observable at the LHC. However, the up-type Yukawa couplings on the IR brane, which are bounded from below by recent bounds on CP violation in the D system, induce flavor misalignment radiatively. Off-diagonal down-type Yukawa couplings and kinetic mixings for the down quarks are both consequences of this effect. These radiative Yukawa corrections can be reduced by raising the flavon VEV on the IR brane (at the price of some moderate tuning), or by extending the Higgs sector. The flavor changing effects from the radiatively induced Yukawa mixing terms are at around the current upper experimental bounds. We also show the generic bounds on UV-brane induced flavor violating effects, and comment on possible additional flavor violations from bulk flavor gauge bosons and the bulk Yukawa scalars.
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spelling cern-11879002019-09-30T06:29:59Zdoi:10.1103/PhysRevD.81.075025http://cds.cern.ch/record/1187900engCsáki, CsabaPerez, GiladSurujon, Ze'evWeiler, AndreasFlavor Alignment via Shining in RSParticle Physics - PhenomenologyWe present a class of warped extra dimensional models whose flavor violating interactions are much suppressed compared to the usual anarchic case due to flavor alignment. Such suppression can be achieved in models where part of the global flavor symmetry is gauged in the bulk and broken in a controlled manner. We show that the bulk masses can be aligned with the down type Yukawa couplings by an appropriate choice of bulk flavon field representations and TeV brane dynamics. This alignment could reduce the flavor violating effects to levels which allow for a Kaluza-Klein scale as low as 2-3 TeV, making the model observable at the LHC. However, the up-type Yukawa couplings on the IR brane, which are bounded from below by recent bounds on CP violation in the D system, induce flavor misalignment radiatively. Off-diagonal down-type Yukawa couplings and kinetic mixings for the down quarks are both consequences of this effect. These radiative Yukawa corrections can be reduced by raising the flavon VEV on the IR brane (at the price of some moderate tuning), or by extending the Higgs sector. The flavor changing effects from the radiatively induced Yukawa mixing terms are at around the current upper experimental bounds. We also show the generic bounds on UV-brane induced flavor violating effects, and comment on possible additional flavor violations from bulk flavor gauge bosons and the bulk Yukawa scalars.arXiv:0907.0474CERN-PH-TH-2009-109UCSD-PTH 09-06oai:cds.cern.ch:11879002009-07-06
spellingShingle Particle Physics - Phenomenology
Csáki, Csaba
Perez, Gilad
Surujon, Ze'ev
Weiler, Andreas
Flavor Alignment via Shining in RS
title Flavor Alignment via Shining in RS
title_full Flavor Alignment via Shining in RS
title_fullStr Flavor Alignment via Shining in RS
title_full_unstemmed Flavor Alignment via Shining in RS
title_short Flavor Alignment via Shining in RS
title_sort flavor alignment via shining in rs
topic Particle Physics - Phenomenology
url https://dx.doi.org/10.1103/PhysRevD.81.075025
http://cds.cern.ch/record/1187900
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AT perezgilad flavoralignmentviashininginrs
AT surujonzeev flavoralignmentviashininginrs
AT weilerandreas flavoralignmentviashininginrs