Speaker
Admir Greljo
(Universitaet Basel (CH))
Description
We revisit a class of lepton-flavor non-universal $\mathrm{U}(1)$ gauge extensions of the Standard Model, first introduced in~\cite{Davighi:2022qgb}, which provides a subtle mechanism to simultaneously accommodate the observed neutrino masses and mixing angles via a high-scale seesaw while predicting exact proton stability to all orders in the effective field theory, ensured by a residual discrete gauge symmetry at low energies. The minimal thermal leptogenesis scenario is naturally realized. In addition, an inevitable consequence of this framework is the existence of a light pseudo-Goldstone boson. We examine the phenomenological implications of this boson, with a particular focus on its potential role as Majoron dark matter.
Author
Admir Greljo
(Universitaet Basel (CH))
