http://arxiv.org/abs/1405.5870
We investigate a Z3 symmetric model with two-loop radiative neutrino masses. A dark matter in the model is either a Dirac fermion or a complex scalar as a result of unbroken Z3 symmetry. In addition to standard annihilation processes, semi-annihilation of the dark matter contribute 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 signature of dark matter in the Z2 symmetric model.
M. Aoki and T. Toma
Fri, 23 May 14
43/44
Comments: 22 pages, 8 figures, 3 tables
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