Implications of an additional scale on leptogenesis

Details Implications of an additional scale on leptogenesis Implications of an additional scale on leptogenesis

2009-04-20

arxiv.org/abs/0904.3052v1

J.Phys.Conf.Ser.171:012078,2009

Physics

High Energy Physics

High Energy Physics - Phenomenology

9 pages, 8 figures. To appear in the proceedings of DISCRETE'08: Symposium on Prospects in the Physics of Discrete Symmetries,

Scientific paper

10.1088/1742-6596/171/1/012078

We consider variations of the standard leptogenesis picture arising from the presence of an additional scale related to the breaking of a $U(1)_X$ abelian flavor symmetry. We show that quite generically the presence of an additional energy scale might introduce new qualitative and quantitative changes on leptogenesis. Especially interesting is the possibility of having succesful TeV leptogenesis with a vanishing total CP violating asymmetry. By solving the corresponding Boltzmann equations it is shown that these kind of scenarios encounters no difficulties in generating the Cosmic baryon asymmetry.

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