Neutrino Oscillations v.s. Leptogenesis in SO(10) Models

Details Neutrino Oscillations v.s. Leptogenesis in SO(10) Models Neutrino Oscillations v.s. Leptogenesis in SO(10) Models

2000-04-25

arxiv.org/abs/hep-ph/0004227v4

JHEP 0304 (2003) 020

Physics

High Energy Physics

High Energy Physics - Phenomenology

23 pages, 8 eps figures, JHEP3 format; more accurate effect of dilution reduces previous results, inclusion of all phases, add

Scientific paper

10.1088/1126-6708/2003/04/020

We study the link between neutrino oscillations and leptogenesis in the minimal framework assuming an SO(10) see-saw mechanism with 3 families. Dirac neutrino masses being fixed, the solar and atmospheric data then generically induce a large mass-hierarchy and a small mixing between the lightest right-handed neutrinos, which fails to produce sufficient lepton asymmetry by 5 orders of magnitudes at least. This failure can be attenuated for a very specific value of the mixing sin^2(2\theta_{e3})=0.1, which interestingly lies at the boundary of the CHOOZ exclusion region, but will be accessible to future long baseline experiments.

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