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arXiv · 2304.07462

Light cold dark matter from non-thermal decay

Ki-Young Choi·Jinn-Ouk Gong·Junghoon Joh·Wan-Il Park·Osamu Seto
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Abstract

We investigate the mass range and the corresponding free-streaming length scale of dark matter produced non-thermally from decay of heavy objects which can be either dominant or sub-dominant at the moment of decay. We show that the resulting dark matter could be very light well below keV scale with a free-streaming length satisfying the Lyman-{\alpha} constraints. We demonstrate two explicit examples for such light cold dark matter.

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Ki-Young Choi, Jinn-Ouk Gong, Junghoon Joh, Wan-Il Park, Osamu Seto. 2023-04-15. Light cold dark matter from non-thermal decay. https://doi.org/10.1016/j.physletb.2023.138126

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