Inflationary primordial black holes as all dark matter

Following a new microlensing constraint on primordial black holes (PBHs) with ~10²⁰--10²⁸ g [H. Niikura et al., arXiv:1701.02151.], 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 10²⁰ g with a small width σ0.1, 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.