We propose a minimal and motivated extension of the Standard Model characterised by an approximate lepton number conservation, which is able to simultaneously generate neutrino masses and to account for a successful baryogenesis via leptogenesis. The sterile fermions involved in the leptogenesis process have masses at the GeV scale. We determine the viable parameter space that complies with both the neutrino and baryogenesis phenomenology, and analyse the different regimes for the generation of a lepton asymmetry in the early Universe (weak and strong-washout) in order to determine their testability in future experimental facilities.
Lepton number symmetry as a way to testable leptogenesis / Lucente M.; Abada A.; Arcadi G.; Domcke V.. - ELETTRONICO. - (2016), pp. 117-124. (Intervento presentato al convegno 51st Rencontres de Moriond on Electroweak Interactions and Unified Theories, EW 2016 tenutosi a Aosta Valley, ita nel 2016).
Lepton number symmetry as a way to testable leptogenesis
Lucente M.;
2016
Abstract
We propose a minimal and motivated extension of the Standard Model characterised by an approximate lepton number conservation, which is able to simultaneously generate neutrino masses and to account for a successful baryogenesis via leptogenesis. The sterile fermions involved in the leptogenesis process have masses at the GeV scale. We determine the viable parameter space that complies with both the neutrino and baryogenesis phenomenology, and analyse the different regimes for the generation of a lepton asymmetry in the early Universe (weak and strong-washout) in order to determine their testability in future experimental facilities.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.