Implications of Flavor Dynamics for Fermion Triplet Leptogenesis

Details Implications of Flavor Dynamics for Fermion Triplet Leptogenesis Implications of Flavor Dynamics for Fermion Triplet Leptogenesis

2010-07-12

arxiv.org/abs/1007.1907v2

JHEP 1010:036,2010

Physics

High Energy Physics

High Energy Physics - Phenomenology

22 pages, 9 figures, extended discussion on collider phenomenology, references added. Version matches publication in JHEP

Scientific paper

10.1007/JHEP10(2010)036

We analyze the importance of flavor effects in models in which leptogenesis proceeds via the decay of Majorana electroweak triplets. We find that depending on the relative strengths of gauge and Yukawa reactions the $B-L$ asymmetry can be sizably enhanced, exceeding in some cases an order of magnitude level. We also discuss the impact that such effects can have for TeV-scale triplets showing that as long as the $B-L$ asymmetry is produced by the dynamics of the lightest such triplet they are negligible, but open the possibility for scenarios in which the asymmetry is generated above the TeV scale by heavier states, possibly surviving the TeV triplet related washouts. We investigate these cases and show how they can be disentangled at the LHC by using Majorana triplet collider observables and, in the case of minimal type III see-saw models even through lepton flavor violation observables.

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