Abstract
We investigate leptogenesis with almost degenerate neutrinos in the framework of the democratic mass matrix, which naturally explains the large mixing angles for neutrino oscillations as well as quark masses and the mixing matrix. We find that the baryon asymmetry in the present universe is explained via the decays of right-handed neutrinos produced nonthermally by the inflaton decay. The model predicts neutrinoless double beta decays accessible in near future experiments.
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