Leptogenesis with Dirac Neutrinos

Details Leptogenesis with Dirac Neutrinos Leptogenesis with Dirac Neutrinos

1999-07-30

arxiv.org/abs/hep-ph/9907562v3

Phys.Rev.Lett.84:4039-4042,2000

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages, Latex (using amsmath,feynmp,graphicx), 4 figures

Scientific paper

10.1103/PhysRevLett.84.4039

We describe a "neutrinogenesis" mechanism whereby, in the presence of right-handed neutrinos with sufficiently small pure Dirac masses, (B+L)-violating sphaleron processes create the baryon asymmetry of the Universe, even when B=L=0 initially. It is shown that the resulting neutrino mass constraints are easily fulfilled by the neutrino masses suggested by current experiments. We present a simple toy model which uses this mechanism to produce the observed baryon asymmetry of the Universe. (PostScript Errors corrected in latest Version).

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