Light cold dark matter from non-thermal decay
arXiv:2304.07462 · doi:10.1016/j.physletb.2023.138126
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-α constraints. We demonstrate two explicit examples for such light cold dark matter.
arXiv comment8 pages, 4 figures
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