PT Journal
AU Choi, KY
   Gong, JO
   Joh, J
   Park, WI
   Seto, O
TI Light cold dark matter from non-thermal decay
SO Physics Letters B
JI Phys. Lett. B
PY 2023
BP 138126
EP 8pp
VL 845
DI 10.1016/j.physletb.2023.138126
LA English
DE Dark matter; Non-thermal production; Axion; Q-ball
AB 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.
ER