Leptogenesis with dirac neutrinos |
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Authors: | Dick Lindner Ratz Wright |
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Institution: | Physik Department, Technische Universitat Munchen, D-85748 Garching, Germany and and Max Planck Institut fur Physik, D-80805 Munchen, Germany. |
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Abstract: | 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. |
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