Purely Flavored Leptogenesis

Details Purely Flavored Leptogenesis Purely Flavored Leptogenesis

2009-04-20

arxiv.org/abs/0904.3043v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

22 pages, 11 figures

Scientific paper

We study a model for leptogenesis in which the total CP asymmetries in the decays and scatterings involving the SU(2) singlet seesaw neutrinos $N_\alpha$ vanish ($\epsilon_{N_\alpha}=0$). Leptogenesis is possible due to non-vanishing CP violating lepton flavor asymmetries, realizing a situation in which the baryon asymmetry is due exclusively to flavor effects. We study the production of a net lepton asymmetry by solving the Boltzmann equations specific to this model, and we show that successful leptogenesis can be obtained at a scale as low as the TeV. We also discuss constraints on the model parameter space arising from current experimental upper limits on lepton flavor violating decays.

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