Baryogenesis through lepton number violation

Details Baryogenesis through lepton number violation Baryogenesis through lepton number violation

1998-10-05

arxiv.org/abs/hep-ph/9810247v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

12 pages latex file with iopconf.sty and three postscript figures (to appear in Second Int Conf on Dark Matter in Astro and Pa

Scientific paper

The most promising scenarios of baryogenesis seems to be the one through lepton number violation. Lepton number violation through a Majarana mass of the right-handed neutrinos can generate a lepton asymmetry of the universe when the right-handed neutrinos decay. The left-handed neutrinos get small Majorana masses through see-saw mechanism in these models. A triplet higgs scalar violating lepton number explicitly through its couplings to two leptons or two higgs doublets can also naturally give small Majorana masses to the left-handed neutrinos and also generate a lepton asymmetry of the universe. We review both these models of leptogenesis, where the lepton number asymmetry then gets converted to a baryon asymmetry of the universe before the electroweak phase transition.

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