Speaker
Ivo de Medeiros Varzielas
(CFTP, Instituto Superior Técnico)
Description
In models with flavour symmetries added to the gauge group of the Standard Model the CP-violating asymmetry necessary for leptogenesis may be related with low-energy parameters. A particular case of interest is when the flavour symmetry produces an exact mass independent lepton mixing scheme, leading to a vanishing CP-violating asymmetry. We present a model-independent discussion that confirms this always occurs for unflavoured leptogenesis in type I see-saw scenarios.
Primary author
Ivo de Medeiros Varzielas
(CFTP, Instituto Superior Técnico)
