Speaker
Xavier Ponce Díaz
(University of Basel)
Description
In this talk, we will revisit a class of lepton-flavor non-universal $U(1)$ gauge extensions of the Standard Model that provide a robust mechanism to generate neutrino masses and mixing angles via a high-scale seesaw while ensuring exact proton stability to all orders in the effective field theory. This framework naturally realizes minimal thermal leptogenesis, offering a viable explanation for the observed matter-antimatter asymmetry. A key prediction of this construction is the existence of a light pseudo-Goldstone boson, the majoron. We will explore the potential role of this boson as dark matter and discuss its implications for cosmology and experimental searches.
Author
Xavier Ponce Díaz
(University of Basel)
