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We systematically study and classify scotogenic models with a local U(1)gauge symmetry. These models give rise to radiative neutrino masses and astable dark matter candidate, but avoid the theoretical problems of global anddiscrete symmetries. We restrict the dark sector particle content to up to fourscalar or fermionic SU(2) singlets, doublets or triplets and use theoreticalarguments based on anomaly freedom, Lorentz and gauge symmetry to find allpossible charge assignments of these particles. The U(1) symmetry can be brokenby a new Higgs boson to a residual discrete symmetry, that still stabilizes thedark matter candidate. We list the particle content and charge assignments ofall non-equivalent models. Specific examples in our class of models that havebeen studied previously in the literature are the U(1)$_D$ scotogenic andsinglet-triplet scalar models breaking to $Z_2$. We also briefly discuss thenew phenomenological aspects of our model arising from the presence of a newmassless dark photon or massive $Z'$ boson as well as the additional Higgsboson.

Anomaly-free dark matter models with one-loop neutrino masses and a gauged U(1) symmetry