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.
Original language | English |
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Article number | 138126 |
Journal | Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics |
Volume | 845 |
DOIs | |
State | Published - 10 Oct 2023 |
Bibliographical note
Publisher Copyright:© 2023 The Author(s)
Keywords
- Axion
- Dark matter
- Non-thermal production
- Q-ball