Leptogenesis in flavor models with type I and II seesaws

Abstract

In type I seesaw models with flavor symmetries accounting for the lepton mixing angles the CP asymmetry in right-handed neutrino decays vanishes in the limit in which the mixing pattern is exact. We study the implications that additional degrees of freedom from type II seesaw may have for leptogenesis in such a limit. We classify in a model independent way the possible realizations of type I and II seesaw schemes, differentiating between classes in which leptogenesis is viable or not. We point out that even with the interplay of type I and II seesaws there are generic classes of minimal models in which the CP asymmetry vanishes. Finally we analyze the generation of the lepton asymmetry by solving the corresponding kinetic equations in the general case of a mild hierarchy between the light right-handed neutrino and the scalar triplet masses. We identify the possible scenarios in which leptogenesis can take place.

24 pages, 5 figures; minor corrections; final version for publication in Nucl.Phys.B

References in corpus (9)

• Leptogenesis
• Flavour Matters in Leptogenesis
• Where we are on ${\theta }_{13}$: addendum to "Global neutrino data and recent reactor fluxes: status of three-flavour oscillation parameters"
• CP violation in scatterings, three body processes and the Boltzmann equations for leptogenesis
• Flavor symmetries, leptogenesis and the absolute neutrino mass scale
• Flavour-Dependent Type II Leptogenesis
• Variations on leptogenesis
• Leptonic mixing, family symmetries, and neutrino phenomenology
• Renormalisation group improved leptogenesis in family symmetry models

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