Flavour-Dependent Type II Leptogenesis
| dc.creator | Antusch, Stefan | |
| dc.date | 2007-04-12 | |
| dc.date | 2008-09-11 | |
| dc.date.accessioned | 2026-07-07T10:59:32Z | |
| dc.date.available | 2026-07-07T10:59:32Z | |
| dc.description | We reanalyse leptogenesis via the out-of-equilibrium decay of the lightest right-handed neutrino in type II seesaw scenarios, taking into account flavour-dependent effects. In the type II seesaw mechanism, in addition to the type I seesaw contribution, an additional direct mass term for the light neutrinos is present. We consider type II seesaw scenarios where this additional contribution arises from the vacuum expectation value of a Higgs triplet, and furthermore an effective model-independent approach. We investigate bounds on the flavour-specific decay asymmetries, on the mass of the lightest right-handed neutrino and on the reheat temperature of the early universe, and compare them to the corresponding bounds in the type I seesaw framework. We show that while flavour-dependent thermal type II leptogenesis becomes more efficient for larger mass scale of the light neutrinos, and the bounds become relaxed, the type I seesaw scenario for leptogenesis becomes more constrained. We also argue that in general, flavour-dependent effects cannot be ignored when dealing with leptogenesis in type II seesaw models. | |
| dc.description | 19 pages, 8 figures; v3: minor additions, typos corrected, results and conclusions unchanged | |
| dc.identifier | https://arxiv.org/abs/0704.1591 | |
| dc.identifier | http://arxiv.org/abs/0704.1591 | |
| dc.identifier | Phys.Rev.D76:023512,2007 | |
| dc.identifier | doi:10.1103/PhysRevD.76.023512 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/187433 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.title | Flavour-Dependent Type II Leptogenesis | |
| dc.type | text |