Nested radiative seesaw masses for dark matter and neutrinos

The scotogenic model of neutrino mass is modified so that the dark Majorana fermion singlet S which makes the neutrino massive is itself generated in one loop. This is accomplished by having Z6 lepton symmetry softly broken to Z2 in the scalar sector by a unique quadratic term.

Automated summary

The scotogenic model of neutrino mass is modified to allow the dark Majorana fermion singlet S, which gives the neutrino its mass, to be self-generated in one loop.