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arXiv · 2604.12024

Baryogenesis and Dark Matter from non-thermally produced WIMPs

Giorgio Arcadi·Sarif Khan·Agnese Mariotti
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Abstract

We illustrate, via a simplified model, a scenario in which the baryon-asymmetry and, possibly the dark matter component of the Universe are simultaneously generated by the decay of a WIMP-like mother particle, in turn produced non-thermally during an epoch of Early Matter domination. We first consider the standard evolution of the Universe and introduce TeV-scale BSM particles, finding that this paradigm cannot produce enough baryon asymmetry. This deficiency can be resolved by considering a non-standard scenario, with a matter-dominated phase prior to radiation-domination. Finally, we include a dark matter candidate, which is non-thermally produced during the Early Matter domination. Our results demonstrate an interesting common origin of baryon asymmetry and Dark Matter, with the particle masses lying within the collider-detectable range, thanks to the presence of non-standard evolution in the early Universe.

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Giorgio Arcadi, Sarif Khan, Agnese Mariotti. 2026-04-13. Baryogenesis and Dark Matter from non-thermally produced WIMPs. https://arxiv.org/abs/2604.12024

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