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arXiv · 1801.06184

Modifying dark matter indirect detection signals by thermal effects at freeze-out

Andi Hektor·Kristjan Kannike·Ville Vaskonen
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Abstract

We present an extension of the Standard Model, containing a fermion dark matter candidate and two real scalar singlets, where the observed dark matter abundance is produced via freeze-out before the electroweak phase transition. We show that in this case the dark matter annihilation channels determining its freeze-out are different from those producing indirect detection signal. We present a benchmark model where the indirect annihilation cross-section differs from the freeze-out one. The model also has a gravitational wave signature due to the first order electroweak phase transition.

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Andi Hektor, Kristjan Kannike, Ville Vaskonen. 2018-01-18. Modifying dark matter indirect detection signals by thermal effects at freeze-out. https://doi.org/10.1103/physrevd.98.015032

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