Light cold dark matter from non-thermal decay
High Energy Physics - Phenomenology
2023-09-07 v2 Cosmology and Nongalactic Astrophysics
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.
Keywords
Cite
@article{arxiv.2304.07462,
title = {Light cold dark matter from non-thermal decay},
author = {Ki-Young Choi and Jinn-Ouk Gong and Junghoon Joh and Wan-Il Park and Osamu Seto},
journal= {arXiv preprint arXiv:2304.07462},
year = {2023}
}
Comments
8 pages, 4 figures