Low-scale standard supersymmetric leptogenesis

Abstract Strictly adhering to the standard supersymmetric seesaw mechanism, we present a neutrino mass model which allows successful standard thermal leptogenesis compatible with gravitino cosmology. Some neutrino Yukawa couplings are naturally much larger than the naive estimates following from the seesaw formula. This leads to large BR ( μ → e γ ) , detectable in the next round of experiments. Ratios of μ → e γ , τ → e γ and τ → μ γ branching ratios are predicted in terms of the measurable neutrino mass matrix.