Flavour Issues in Leptogenesis

Details Flavour Issues in Leptogenesis Flavour Issues in Leptogenesis

2006-01-11

arxiv.org/abs/hep-ph/0601083v3

JCAP0604:004,2006

Physics

High Energy Physics

High Energy Physics - Phenomenology

19 pages, corrected equations for flavour oscillations

Scientific paper

10.1088/1475-7516/2006/04/004

We study the impact of flavour in thermal leptogenesis, including the quantum oscillations of the asymmetries in lepton flavour space. In the Boltzmann equations we find different numerical factors and additional terms which can affect the results significantly. The upper bound on the CP asymmetry in a specific flavour is weaker than the bound on the sum. This suggests that -- when flavour dynamics is included -- there is no model-independent limit on the light neutrino mass scale,and that the lower bound on the reheat temperature is relaxed by a factor ~ (3 - 10).

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