Scotogenic dark symmetry as a residual subgroup of Standard Model symmetries

Abstract

We demonstrate that a scotogenic dark symmetry can be obtained as a residual subgroup of the global symmetry already present in the Standard Model. In addition, we propose a general framework in which the symmetry is spontaneously broken into an even subgroup, setting the general conditions for neutrinos to be Majorana and for dark matter stability to exist in terms of the residual. As an example, under this general framework, we build a class of simple models where, in a scotogenic manner, the dark matter candidate is the lightest particle running inside the mass loop of a neutrino. The global symmetry in our framework, being anomaly free, can also be gauged in a straightforward manner leading to a richer phenomenology.