PoS - Proceedings of Science
Volume 414 - 41st International Conference on High Energy physics (ICHEP2022) - Astroparticle Physics and Cosmology
Leptogenesis from U(1) flavor symmetry
S.Β Marciano
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Pre-published on: November 21, 2022
Published on: β€”
Abstract
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 πΏπ‘’βˆ’πΏπœ‡βˆ’πΏπœ for lepton doublets and arbitrary right-handed charges. The model is able to reproduce the experimental values of the mixing angles of the PMNS matrix and of the π‘Ÿ = Ξ”π‘š^2sun/Ξ”π‘š^2atm ratio, with only a moderate fine tuning of the Lagrangian free parameters. 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 Equations (BE).
DOI: https://doi.org/10.22323/1.414.0078
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