Reference : Minimal Lepton Flavor Violating Realizations of Minimal Seesaw Models.
 Document type : Scientific journals : Article Discipline(s) : Physical, chemical, mathematical & earth Sciences : Physics To cite this reference: http://hdl.handle.net/2268/137014
 Title : Minimal Lepton Flavor Violating Realizations of Minimal Seesaw Models. Language : English Author, co-author : Aristizabal Sierra, Diego [Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Physique des astroparticules >] Degée, Audrey [Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Physique des astroparticules >] Kamenik, Jernej F. [Stefan Inst., Ljubljana > > > >] Publication date : May-2012 Journal title : Journal of High Energy Physics Volume : JHEP 1207 (2012) 135 Issue/season : 2012 Pages : 135-156 Peer reviewed : Yes (verified by ORBi) Audience : International ISSN : 1126-6708 Abstract : [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. Target : Researchers Permalink : http://hdl.handle.net/2268/137014 DOI : 10.1007/JHEP07(2012)135

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