Leptogenesis from Bilinear R-parity Violating Couplings

Details Leptogenesis from Bilinear R-parity Violating Couplings Leptogenesis from Bilinear R-parity Violating Couplings

2005-03-23

arxiv.org/abs/hep-ph/0503232v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

7 pages, no figures

Scientific paper

We reexamine the idea that bilinear R-parity violating couplings can be responsible for leptogenesis. We prove that, to have lepton number violation before the electroweak phase transition, misalignment between the lepton-Higgsino and slepton-Higgs sectors must be involved. The processes that generate a lepton asymmetry are bino or wino decays into a lepton-Higgs and slepton-Higgsino final states. Since these decays occur mainly while the gauginos are still in thermal equilibrium, they quantitatively fail to produce the observed baryon asymmetry of the universe.

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