Inflationary Primordial Black Holes as All Dark Matter

Abstract

Following a new microlensing constraint on primordial black holes (PBHs) with $\sim 10^{20}$--$10^{28}\mathrm{g}$~[1], we revisit the idea of PBH as all Dark Matter (DM). We have shown that the updated observational constraints suggest the viable mass function for PBHs as all DM to have a peak at $\simeq 10^{20}\mathrm{g}$ with a small width $\sigma \lesssim 0.1$, by imposing observational constraints on an extended mass function in a proper way. We have also provided an inflation model that successfully generates PBHs as all DM fulfilling this requirement.

7 pages, 3 figures

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