Jul 6 – 13, 2022
Bologna, Italy
Europe/Rome timezone

Leptogenesis from U(1) flavor symmetry

Jul 7, 2022, 10:15 AM
Room 8 (Blu)

Room 8 (Blu)

Parallel Talk Astroparticle Physics and Cosmology Astroparticle Physics and Cosmology


Simone Marciano (Istituto Nazionale di Fisica Nucleare)


We present a simple extension of the Standard Model with three right-handed neutrinos with an additional U(1$)_\text{F}$ abelian flavor symmetry, with a non standard leptonic charge $L_e-L_\mu-L_\tau$ for lepton doublets and arbitrary right-handed charges. We present a see-saw realization of such a scenario. The baryon asymmetry of the Universe is generated via thermal leptogenesis through CP-violating decays of the heavy sterile neutrinos. We present a detailed numerical solution of the relevant Boltzmann equations in two different scenarios: three quasi-degenerate heavy Majorana neutrino masses and a hierarchical mass spectrum.

In-person participation Yes

Primary authors

Prof. Davide Meloni (Roma Tre - INFN) Simone Marciano (Istituto Nazionale di Fisica Nucleare) Dr Giorgio Arcadi

Presentation materials