期刊
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
卷 -, 期 9, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/1475-7516/2014/09/016
关键词
dark matter theory; particle physics - cosmology connection; neutrino theory
资金
- European ITN project [FP7-PEOPLE-2011-ITN, PITN-GA-2011-289442-INVISIBLES]
- [25400250]
- [26105509]
- Grants-in-Aid for Scientific Research [26105509] Funding Source: KAKEN
We investigate a Z(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(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(2) symmetric models.
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