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Moduli Portal Dark Matter
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We show that moduli fields as mediators between the Standard Model and the dark sector can naturally lead to the observed relic abundance. Indeed, even if moduli are very massive, the nature of their couplings with matter and gauge fields allows producing a sufficiently large amount of dark matter in the early Universe through the freeze-in mechanism. Moreover, the complex nature of the moduli fields whose real and imaginary part couple differently to the thermal bath gives an interesting and unusual phenomenology compared to other freeze-in models of that type.
Forward citations
Cited by 4 Pith papers
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Aspects of Gravitational Portals and Freeze-in during Reheating
During reheating, freeze-in from the gravitationally produced radiation bath can dominate the dark matter relic density for DM masses above the reheating temperature, with k- and n-dependent constraints.
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CPon Dark Matter
A light scalar from spontaneous CP violation, the CPon, can be a viable dark matter candidate with a mass between about 10 meV and 1 MeV and a suppression scale above 10^12 GeV.
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Constraining Nonthermal Dark Matter's Impact on the Matter Power Spectrum
Nonthermal dark matter produced relativistically in an early matter-dominated era remains mostly relativistic at reheating, so free streaming suppresses small-scale structure and Lyman-alpha plus Milky Way satellite d...
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When direct detection constrains reheating temperature: freeze-in with stronger couplings and inflaton-seeded freeze-in
Stronger couplings or inflaton-seeded initial abundance allow freeze-in dark matter to match the relic density while evading DAMIC-M and PandaX bounds for reheating temperatures below the electroweak scale.
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