Reference : Minimal Lepton Flavor Violating Realizations of Minimal Seesaw Models.
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Physics
http://hdl.handle.net/2268/137014
Minimal Lepton Flavor Violating Realizations of Minimal Seesaw Models.
English
Aristizabal Sierra, Diego mailto [Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Physique des astroparticules >]
Degée, Audrey mailto [Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Physique des astroparticules >]
Kamenik, Jernej F. mailto [Stefan Inst., Ljubljana > > > >]
May-2012
Journal of High Energy Physics
JHEP 1207 (2012) 135
2012
135-156
Yes (verified by ORBi)
International
1126-6708
[en] We study the implications of the global U(1)R symmetry present in minimal
lepton flavor violating implementations of the seesaw mechanism for neutrino masses.
In the context of minimal type I seesaw scenarios with a slightly broken U(1)R, we
show that, depending on the R-charge assignments, two classes of generic models can
be identi fied. Models where the right-handed neutrino masses and the lepton number
breaking scale are decoupled, and models where the parameters that slightly break
the U(1)R induce a suppression in the light neutrino mass matrix. We show that
within the fi rst class of models, contributions of right-handed neutrinos to charged
lepton flavor violating processes are severely suppressed. Within the second class
of models we study the charged lepton flavor violating phenomenology in detail,
focusing on \ mu->e \gamma , \mu->3e and \mu- e conversion in nuclei. We show that sizable
contributions to these processes are naturally obtained for right-handed neutrino
masses at the TeV scale. We then discuss the interplay with the eff ects of the right-
handed neutrino interactions on primordial B- L asymmetries,fi nding that sizable
right-handed neutrino contributions to charged lepton flavor violating processes are
incompatible with the requirement of generating (or even preserving preexisting)
B-L asymmetries consistent with the observed baryon asymmetry of the Universe.
Researchers
http://hdl.handle.net/2268/137014
10.1007/JHEP07(2012)135

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