Following a new microlensing constraint on primordial black holes (PBHs) with $\sim10^{ 20}$--$10^{ 28}\,\mathrm{ g}$~[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.
Categories: astro-ph.CO hep-ph