Weak Scale Leptogenesis, R-symmetry, and a Displaced Higgs

Details Weak Scale Leptogenesis, R-symmetry, and a Displaced Higgs Weak Scale Leptogenesis, R-symmetry, and a Displaced Higgs

2011-10-31

arxiv.org/abs/1111.0008v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

5pgs, 2 figures, revtex

Scientific paper

We present a supersymmetric model of leptogenesis in which the right-handed neutrinos have weak scale masses and O(10-2-10-3) yukawa couplings. The model employs an R-symmetry at the weak scale that forces neutrino masses to be proportional to the gravitino mass. We predict that the lightest right-handed neutrino decays to a displaced Higgs and neutrino and that the NLSP is long-lived on collider scales. These could be striking signatures at the LHC if, for instance, the right-handed neutrino is produced in a cascade decay.

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