A lower bound on dark matter mass
High Energy Physics - Phenomenology
2024-08-14 v3 Cosmology and Nongalactic Astrophysics
Abstract
We argue that there is a lower bound of order eV on dark matter mass if it is produced after inflation via a process with finite correlation length. We rely on non-detection of free-streaming suppression and white-noise enhancement of density perturbations as the observational inputs.
Keywords
Cite
@article{arxiv.2211.09775,
title = {A lower bound on dark matter mass},
author = {Mustafa A. Amin and Mehrdad Mirbabayi},
journal= {arXiv preprint arXiv:2211.09775},
year = {2024}
}
Comments
v3: compared to v2, change in the definition of the suppression scale due to free streaming, 10^(-19) eV bound not affected, but stronger bounds in particular explicit examples weakened