# Inflationary Primordial Black Holes as All Dark Matter

## TL;DR

This paper revisits the hypothesis that primordial black holes could account for all dark matter, incorporating new microlensing constraints and proposing an inflation model that produces the required PBH mass distribution.

## Contribution

It updates observational constraints on PBH mass functions and introduces an inflation model that generates PBHs matching these constraints as all dark matter.

## Key findings

- Viable PBH mass peak at ~10^{20} g with narrow width
- Updated constraints restrict PBH mass function
- Proposed inflation model successfully produces PBHs as all dark matter

## Abstract

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.