Neutrino Masses and Leptogenesis in a Le-Lμ-L𝜏 Model

Dec 7, 2021, 8:20 AM
30m
Online

Online

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Speaker

Simone Marciano (University of Roma Tre)

Description

We present a simple extension of the Standard Model with three right-handed neutrinos in a SUSY framework, with an additional U(1)_F abelian flavor symmetry with a non standard leptonic charge for lepton doublets and arbitrary right-handed charges. We show how it is possible to provide the correct predictions for the mixing angles of the PMNS matrix and for the r=(∆m_sun)^2/(∆m_atm)^2 parameter, with a moderate fine tuning. The baryon asymmetry of the Universe is generated via thermal Leptogenesis through CP-violating decays of the heavy right-handed neutrinos. We present a detailed numerical solution of the relevant Boltzmann equation accounting for the impact of the distribution of the asymmetry in the lepton flavors.

Primary author

Simone Marciano (University of Roma Tre)

Presentation materials