Implications of an additional scale on leptogenesis

Abstract

We consider variations of the standard leptogenesis picture arising from the presence of an additional scale related to the breaking of a $U(1{)}_X$ abelian flavor symmetry. We show that quite generically the presence of an additional energy scale might introduce new qualitative and quantitative changes on leptogenesis. Especially interesting is the possibility of having succesful TeV leptogenesis with a vanishing total CP violating asymmetry. By solving the corresponding Boltzmann equations it is shown that these kind of scenarios encounters no difficulties in generating the Cosmic baryon asymmetry.

9 pages, 8 figures. To appear in the proceedings of DISCRETE'08: Symposium on Prospects in the Physics of Discrete Symmetries, Valencia, Spain, 11-16 Dec 2008

References in corpus (12)

• Five-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Data Processing, Sky Maps, and Basic Results
• Leptogenesis
• A lower bound on the right-handed neutrino mass from leptogenesis
• Towards a complete theory of thermal leptogenesis in the SM and MSSM
• CP violating decays in leptogenesis scenarios
• Three-flavour neutrino oscillation update
• The importance of flavor in leptogenesis
• Flavour Issues in Leptogenesis
• Flavour Matters in Leptogenesis
• The importance of N2 leptogenesis
• Study of flavour dependencies in leptogenesis
• Variations on leptogenesis

Cited by in corpus (4)

• Flavor symmetries, leptogenesis and the absolute neutrino mass scale
• Implications of residual CP symmetry for leptogenesis in a model with two right-handed neutrinos
• Lepton Flavor Equilibration and Leptogenesis
• Early Universe effective theories: The Soft Leptogenesis and R-Genesis Cases