Generalizes UFO to T ~ a^{-ξ} and introduces GUFO from gravitational production, extending DM mass reach to 10^7 GeV for n=2 in matter-like reheating.
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The 3-3-1 model with right-handed neutrinos supplies a natural sub-MeV dark matter candidate as a gravitationally massive pseudo-Goldstone boson whose relic density is set by freeze-in at low reheating temperatures.
Low-reheating-temperature freeze-in of SU(2) vector dark matter yields three stable degenerate states and enlarges the viable parameter space relative to abelian models, with part already constrained by PandaX-4T and LZ.
citing papers explorer
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Gravitational ultra-relativistic freeze-out during general reheating
Generalizes UFO to T ~ a^{-ξ} and introduces GUFO from gravitational production, extending DM mass reach to 10^7 GeV for n=2 in matter-like reheating.
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The 3-3-1 Model: a natural framework for sub-MeV dark matter
The 3-3-1 model with right-handed neutrinos supplies a natural sub-MeV dark matter candidate as a gravitationally massive pseudo-Goldstone boson whose relic density is set by freeze-in at low reheating temperatures.
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Freeze-in $SU(2)$ vector dark matter at low reheating temperature
Low-reheating-temperature freeze-in of SU(2) vector dark matter yields three stable degenerate states and enlarges the viable parameter space relative to abelian models, with part already constrained by PandaX-4T and LZ.