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Thermal Dark Matter from Freezeout of Inverse Decays
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We propose a new thermal dark matter candidate whose abundance is determined by the freezeout of inverse decays. The relic abundance depends parametrically only on a decay width, while matching the observed value requires that the coupling determining the width-and the width itself-should be exponentially small. The dark matter is therefore very weakly coupled to the Standard Model, evading conventional searches. This INverse DecaY ('INDY') dark matter can be discovered by searching for the long-lived particle that decays into the dark matter at future planned experiments.
Forward citations
Cited by 3 Pith papers
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Dark Phoenix: dark matter relic from its own decay
A transient post-freeze-out decay window for dark matter, closed by a first-order phase transition that jumps a partner mass, can reduce an overproduced thermal relic to the observed abundance.
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Pion dark matter in a $\theta$ vacuum: a thermal relic with sharp velocity-dependent self-interactions
A QCD-like dark sector with a theta vacuum and a dark photon portal can simultaneously reproduce the dark matter relic abundance and produce the sharply velocity-dependent self-interactions inferred from small-scale s...
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Minimal extension of the Standard Model with a mirror symmetry between fundamental fermions and a possible origin of dark matter
A new U(1) extension of the Standard Model is proposed, with a neutrino-coupled gauge boson and a dark Higgs scalar as a freeze-in dark matter candidate, yielding an estimated coupling between 10^-8.5 and 10^-6 times ...
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