A lower bound on dark matter mass

Authors: Mustafa A. Amin, Mehrdad Mirbabayi

v2: 4 pages, 2 figures + appendices. Compared to v1: bound made more conservative (by including a logarithmic correction), added explicit examples, updated figures and appendices

License: CC BY 4.0

Abstract: We argue that there is a lower bound of order $10^{-19}$ 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.

Submitted to arXiv on 17 Nov. 2022

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