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Title: Impact of semi-annihilation of Z{sub 3} symmetric dark matter with radiative neutrino masses

We investigate a Z{sub 3} symmetric model with two-loop radiative neutrino masses. Dark matter in the model is either a Dirac fermion or a complex scalar as a result of an unbroken Z{sub 3} symmetry. In addition to standard annihilation processes, semi-annihilation of the dark matter contributes to the relic density. We study the effect of the semi-annihilation in the model and find that those contributions are important to obtain the observed relic density. The experimental signatures in dark matter searches are also discussed, where some of them are expected to be different from the signatures of dark matter in Z{sub 2} symmetric models.
Authors:
 [1] ;  [2]
  1. Institute for Theoretical Physics, Kanazawa University, Kanazawa 920-1192 (Japan)
  2. Institute for Particle Physics Phenomenology, University of Durham, Durham DH1 3LE (United Kingdom)
Publication Date:
OSTI Identifier:
22375888
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Cosmology and Astroparticle Physics; Journal Volume: 2014; Journal Issue: 09; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ANNIHILATION; DENSITY; MASS; NEUTRINOS; NONLUMINOUS MATTER; SCALARS; SYMMETRY