A model of radiative neutrino mass: with or without dark matter
Abstract
We present a threeloop model of neutrino mass whose mostgeneral Lagrangian possesses a softlybroken accidental Z _{2} symmetry. In the limit that a single parameter vanishes, λ →0, the Z _{2} symmetry becomes exact and the model contains a stable darkmatter candidate. However, even for finite λ ≪1, longlived dark matter is possible, giving a unified solution to the neutrino mass and dark matter problems that does not invoke a new symmetry. Taken purely as a neutrino mass model, the new physics can be at the TeV scale. When dark matter is incorporated, however, only a singlet scalar can remain this light, though the dark matter can be tested in directdetection experiments.
 Publication:

Journal of High Energy Physics
 Pub Date:
 October 2014
 DOI:
 10.1007/JHEP10(2014)167
 arXiv:
 arXiv:1404.5917
 Bibcode:
 2014JHEP...10..167A
 Keywords:

 Beyond Standard Model;
 Cosmology of Theories beyond the SM;
 Neutrino Physics;
 Phenomenological Models;
 High Energy Physics  Phenomenology;
 Astrophysics  High Energy Astrophysical Phenomena
 EPrint:
 19 pages, 7 figures, published version