| Article | |
| Report number | arXiv:0809.2285 ; CERN-PH-TH-2008-193 |
| Title | Successful type I Leptogenesis with SO(10)-inspired mass relations |
| Author(s) | Di Bari, Pasquale (INFN, Padua) ; Riotto, Antonio (INFN, Padua ; CERN) |
| Publication | 2009 |
| Imprint | 16 Sep 2008 |
| Number of pages | 18 |
| Note | Comments: 18 pages, 6 figures |
| In: | Phys. Lett. B 671 (2009) 462-469 |
| DOI | 10.1016/j.physletb.2008.12.054 |
| Subject category | Particle Physics - Phenomenology |
| Abstract | It is well-known that thermal leptogenesis through the decays of the lightest right-handed neutrinos encounters serious difficulties when SO(10)-inspired mass conditions are imposed on the Dirac neutrino mass matrix and light neutrino masses are generated through the type I see-saw mechanism. We show that these can be circumvented when the production from the next-to-lightest right-handed neutrinos and flavor effects are properly taken into account. Some conditions on the low energy parameters have to be satisfied in order for inverse processes involving the lightest right-handed neutrino not to wash-out the asymmetry. In particular we find m_1 \gtrsim 0.001 eV, where m_1 is the mass of the lightest left-handed neutrino and that non-vanishing values of the mixing angle theta_13 are preferred in the case of a normal fully hierarchical spectrum of light neutrinos. |
Corresponding record in: Inspire
Record created 2008-09-17, last modified 2016-04-13
