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

Journal Article · Mon Sep 01 00:00:00 EDT 2014 · Journal of Cosmology and Astroparticle Physics

DOI:https://doi.org/10.1088/1475-7516/2014/09/016· OSTI ID:22375888

Aoki, Mayumi ^[1]; Toma, Takashi ^[2]

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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)

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.

• OSTI ID: 22375888
• Journal Information: Journal of Cosmology and Astroparticle Physics, Vol. 2014, Issue 09; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 1475-7516
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
ANNIHILATION
DENSITY
MASS
NEUTRINOS
NONLUMINOUS MATTER
SCALARS
SYMMETRY