Leptogenesis implications in models with Abelian family symmetry and one extra real Higgs singlet

Details Leptogenesis implications in models with Abelian family symmetry and one extra real Higgs singlet Leptogenesis implications in models with Abelian family symmetry and one extra real Higgs singlet

2007-01-23

arxiv.org/abs/hep-ph/0701189v2

Phys.Rev.D75:043510,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

18 pages, RevTeX4, accepted by Phys. Rev. D. v2: minor corrections, note and 1 ref. added, same content as published version

Scientific paper

10.1103/PhysRevD.75.043510

We show that the neutrino models, as suggested by Low, which have an additional Abelian family symmetry and a real Higgs singlet to the default see-saw do not hinder the possibility of successful thermal leptogenesis. For these models (neglecting radiative effects), we have investigated the situation of strong washout in both the one-flavor approximation and when flavor effects are included. The result is that while such models predict that theta_{13}=0 and that one light neutrino to be massless, they do not modify or provide significant constraints on the typical leptogenesis scenario where the final asymmetry is dominated by the decays of the lightest right-handed neutrinos.

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