Dirac Neutrino Mass Matrix and its Link to Freeze-in Dark Matter
Abstract
Using a mechanism which allows naturally small Dirac neutrino masses and its linkage to a dark gauge U(1)D symmetry, a realistic Dirac neutrino mass matrix is derived from S3. The dark sector naturally contains a fermion singlet having a small seesaw mass. It is thus a good candidate for freeze-in dark matter from the decay of the U(1)D Higgs boson.
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