Reference : Implications of tribimaximal lepton mixing for leptogenesis
Scientific congresses and symposiums : Unpublished conference/Abstract
Physical, chemical, mathematical & earth Sciences : Physics
Implications of tribimaximal lepton mixing for leptogenesis
Aristizabal Sierra, Diego mailto [Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Physique des astroparticules >]
Workshop on FLAvor SYmmetries and consequences in accelerators and cosmology (FLASY2011)
11-14 July 2011
[en] Lepton flavor symmetries ; Leptogenesis ; Baryon asymmetry
[en] In models featuring exact mixing patterns the mass matrices that define the effective light neutrino mass matrix -and the light neutrino matrix itself- are form-diagonalizable. We study leptogenesis in type I seesaw models in these contexts pointing out that the CP asymmetry in right-handed neutrino decays vanishes as a consequence of the mass matrices being form-diagonalizable. A non-vanishing CP asymmetry arises once deviations from the exact mixing scheme, induced by higher order effective operators, is allowed. Finally we discuss alternative pathways to viable leptogenesis in these kind of models.

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