Scotogenic neutrino masses and dark matter stability from residual gauge symmetry

Abstract

In the context of the $\mathrm{SU}(3{)}_{\mathrm{c}}\otimes \mathrm{SU}(3{)}_{\mathrm{L}}\otimes \mathrm{U}(1{)}_{\mathrm{X}}\otimes \mathrm{U}(1{)}_{\mathrm{N}}$ (3-3-1-1) extension of the standard model, we show how the spontaneous breaking of the gauge symmetry gives rise to a residual symmetry which accounts for dark matter stability and small neutrino masses in a scotogenic fashion. As a special feature, the gauge structure implies that one of the light neutrinos is massless and, as a result, there is a lower bound for the $0\nu \beta \beta$ decay rate.

Comments: Contribution to: NDM-2020