Ponente
Catarina Simoes
(IFPA-AGO, University of Liege)
Descripción
In this talk we will discuss the interplay between radiative neutrino mass generation and minimal dark matter. We will discuss one-loop neutrino mass models in which one of the mediators is either a hypercharge-zero fermion quintet or a hypercharge-zero scalar septet. For these models we identified various processes that render the neutral component of the dark matter representation cosmologically unstable, and therefore not reconcilable with dark matter stability unless tiny couplings or additional ad hoc symmetries are assumed. This is in contrast with the idea of minimal dark matter, where the stability is entirely due to the standard model gauge symmetry.
Finally, we will comment on higher-order loop neutrino mass models that although consistent with dark matter stability and phenomenological constraints have a Landau pole for $\alpha_2$ at energy scales comparable to the characteristic scale of the model itself, and are then hard to reconcile with perturbativity criteria.
Autor primario
Dr.
Diego Aristizabal Sierra
(IFPA-AGO, University of Liege)
Coautores
Catarina Simoes
(IFPA-AGO, University of Liege)
Dr.
Daniel Wegman
(IFPA-AGO, University of Liege)
