Self-interacting dark matter from late decays and the $H_0$ tension

Krzysztof Jodłowski

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arXiv · 2110.11622

Self-interacting dark matter from late decays and the $H_0$ tension

Krzysztof Jodłowski

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Abstract

We investigate a mechanism for the production of self-interacting dark matter based on WIMP-like messenger state decays into dark matter and dark radiation occurring after recombination. Such a transition leads to a mild relaxation of the Hubble tension, and at the same time may resolve the small-scale structure problems of the $\Lambda$CDM. We illustrate this mechanism in the Higgs portal dark matter model, which we find to be a promising route.

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Krzysztof Jodłowski. 2021-10-22. Self-interacting dark matter from late decays and the $H_0$ tension. https://arxiv.org/abs/2110.11622

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