Low-scale standard supersymmetric leptogenesis

Details Low-scale standard supersymmetric leptogenesis Low-scale standard supersymmetric leptogenesis

2004-08-02

arxiv.org/abs/hep-ph/0408015v3

Phys.Lett.B609:351-359,2005; Erratum-ibid.B632:752-753,2006

Physics

High Energy Physics

High Energy Physics - Phenomenology

15 pages, 4 eps figures; v2: typos corrected, references added, reasoning clarified; v3: 16 pages, off-shell wash-out effects

Scientific paper

10.1016/j.physletb.2005.01.040 1

Strictly adhering to the standard supersymmetric seesaw mechanism, we present a neutrino mass model which allows successful standard thermal leptogenesis compatible with gravitino cosmology. At least some of the neutrino Yukawa couplings must be much larger than the naive estimates following from the seesaw formula. This leads to large BR(mu->e gamma), detectable in the next round of experiments. Ratios of mu->e gamma, tau->e gamma and tau->mu gamma branching ratios are predicted in terms of the measurable neutrino mass matrix.

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