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Paper   IPM / Physic / 12552
School of Physics
  Title:   Dirac Neutrino Mass Generation from Dark Matter
  Author(s): 
1.  Y. Farzan
2.  E. Ma
  Status:   Published
  Journal: Phys. Rev. D
  Vol.:  86
  Year:  2012
  Pages:   033007
  Supported by:  IPM
  Abstract:
In 2006, a simple extension of the Standard Model was proposed in which neutrinos obtain radiative Majorana masses at one-loop level from their couplings with dark matter, hence the term ßcotogenic," from the Greek ßcotos" meaning darkness. Here an analogous mechanism for Dirac neutrino masses is discussed in a minimal model. In different ranges of the parameter space, various candidates for dark matter are possible. In particular, the lightest Dirac fermion which appears in the loop diagram generating neutrino mass can be a viable dark matter candidate. Such a possibility does not exist for the Majorana case. Realistic neutrino mixing in the context of A4 is discussed. A possible supersymmetric extension is also briefly discussed.


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