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WIMP miracle of the second kind
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abstract
We study dark matter production in scenarios where a scale invariant hidden sector interacts with the Standard Model degrees of freedom via a Higgs portal $\lambda \Phi^\dagger\Phi s^2$. If the hidden sector is very weakly coupled to the SM but exhibits strong interactions within its own particle species, the dark matter abundance may arise as a result of a dark freeze-out occurring in the hidden sector. Because of scale invariance, the free parameters in the hidden sector are determined and the dark matter candidate exhibits a 'WIMP miracle of the second kind'. Demonstrating the predictive power of scale invariance, we carry out thorough analysis of dark matter production in several benchmark scenarios where the hidden sector contains either a scalar, fermion (sterile neutrino), or vector dark matter, and discuss the observational consequences of these scenarios.
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Cited by 1 Pith paper
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Freezing-in Cannibals with Low-reheating Temperature
Non-instantaneous (low-temperature) reheating combined with 3-to-2 cannibal self-interactions reshapes the freeze-in dark matter parameter space and opens new light-DM regions for future colliders.
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