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Matter–antimatter asymmetry and neutrino properties |
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| Authors: | Wilfried Buchmüller Michael Plümacher |
| Institution: | a Deutsches Elektronen-Synchrotron DESY, Gruppe Theorie, Notkestrasse 85, D-22603 Hamburg, Germany b Department of Physics and Astronomy, University of Pennsylvania, Philadelphia PA 19104, USA |
| Abstract: | The cosmological baryon asymmetry can be explained as remnant of heavy Majorana neutrino decays in the early universe. We study this mechanism for two models of neutrino masses with a large νμ−ντ mixing angle which are based on the symmetries SU(5)×U(1)F and SU(3)c×SU(3)L×SU(3)R×U(1)F, respectively. In both cases B−L is broken at the unification scale ΛGUT. The models make different predictions for the baryogenesis temperature and the gravitino abundance. |
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