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A lower bound on dark matter mass
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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.
Forward citations
Cited by 5 Pith papers
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Large-Scale Structure Probes of the Post-Inflationary Axiverse
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Universal lower bound on the axion decay constant from free streaming effects
Abundance-boosted axion dark matter generically produces warm nonzero-momentum modes, so Lyman-alpha free-streaming and isocurvature bounds exclude fa below about 10^14-10^15 GeV (10^-18 eV/ma) for most ultralight axi...
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