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.
Highlights
Radiative seesaw neutrino models are one of the attractive scenarios to connect the neutrino sector with the dark matter (DM) sector in a natural manner
In this paper we consider a two-loop induced neutrino mass model [8,9,10,11,12,13] with new particles charged under a hidden Uð1Þ symmetry [14,15,16,17,18,19,20], in which a Dirac fermion type of Z3 DM candidate arises, whose relic density is dominantly explained by the s-channel of semiannihilation modes
We find that after imposing the lepton flavor violations (LFVs) bounds and neutrino oscillation data, one DM-neutrino-scalar coupling yηi1 populates in the range of ð10−3; 1.0Þ, so the annihilation process in this model cannot account for a correct relic density
Summary
Radiative seesaw neutrino models are one of the attractive scenarios to connect the neutrino sector with the dark matter (DM) sector in a natural manner. In this paper we consider a two-loop induced neutrino mass model [8,9,10,11,12,13] with new particles charged under a hidden Uð1Þ symmetry [14,15,16,17,18,19,20], in which a Dirac fermion type of Z3 DM candidate arises, whose relic density is dominantly explained by the s-channel of semiannihilation modes.
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