Enhancement of by seesaw-motivated exotic scalars

We examine the role of seesaw-motivated exotic scalars in loop-mediated Higgs decays. We consider a simple TeV-scale seesaw model built upon the fermionic quintuplet mediator in conjunction with the scalar quadruplet, where we examine portions of the model parameter space for which the contributions...

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Bibliographic Details
Published in:Physics letters. B 2013-02, Vol.719 (4a5), p.404-408
Main Authors: Picek, Ivica, Radovcic, Branimir
Format: Article
Language:English
Subjects:
Charging
Decay
Decay rate
Elementary particles
Mathematical models
Scalars
Online Access:Get full text
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Summary:We examine the role of seesaw-motivated exotic scalars in loop-mediated Higgs decays. We consider a simple TeV-scale seesaw model built upon the fermionic quintuplet mediator in conjunction with the scalar quadruplet, where we examine portions of the model parameter space for which the contributions of charged components of the scalar quadruplet significantly increase the h a gamma gamma decay rate. The most significant change in the diphoton width comes from a doubly charged scalar IBB - - which should be the lightest component in the scalar quadruplet. In the part of the parameter space where the h a gamma gamma decay width is enhanced by a factor 1.25a2 there is a mild suppression of the h a Z gamma decay width by a factor 0.9a0.7.
ISSN:0370-2693