http://arxiv.org/abs/2304.07462
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.
K. Choi, J. Gong, J. Joh, et. al.
Tue, 18 Apr 23
68/80
Comments: 8 pages, 4 figures