A neutrino portal dark sector with mN < mχ < mϕ can be populated by freeze-out, freeze-in, double freeze-in, or by forming a separate cold dark thermal bath, depending on the two portal couplings.
Scrutinizing Right-Handed Neutrino Portal Dark Matter With Yukawa Effect
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abstract
Analyzing the neutrino Yukawa effect in the freeze-out process of a generic dark matter candidate with right-handed neutrino portal, we identify the parameter regions satisfying the observed dark matter relic density as well as the current Fermi-LAT and H.E.S.S. limits and the future CTA reach on gamma-ray signals. In this scenario the dark matter couples to the Higgs boson at one-loop level and thus could be detected by spin-independent nucleonic scattering for a reasonable range of the relevant parameters.
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Cosmological Histories in Neutrino Portal Dark Matter
A neutrino portal dark sector with mN < mχ < mϕ can be populated by freeze-out, freeze-in, double freeze-in, or by forming a separate cold dark thermal bath, depending on the two portal couplings.