Nested Radiative Seesaw Masses for Dark Matter and Neutrinos
Abstract
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. It is shown that S is a viable freeze-in dark-matter candidate through Higgs decay.
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