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arXiv · 1907.11595

Radiative neutrino model with semi-annihilation dark matter

Haiying Cai
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Abstract

We propose a Two-Loop induced radiative neutrino model with hidden gauged $U(1)$ symmetry, in which a dark matter of Dirac fermion arises. The relic density gets contribution from annihilation and semi-annihilation due to a residual $\mathbb{Z}_3$ parity. After imposing the requirement of neutrino oscillation data and lepton flavour violation bounds, we find out that the semi-annihilation plays a crucial role in order to satisfy the relic density constraint $0.117 < \Omega h^2 < 0.123$, by proceeding near either one of two deconstructive scalar resonances. Our numerical analysis demonstrates the allowed region for the DM-Scalar coupling with the DM mass in $(80, 400)$ GeV.

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Haiying Cai. 2019-07-26. Radiative neutrino model with semi-annihilation dark matter. https://doi.org/10.1103/physrevd.101.035006

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