2017/11/30 by Keisuke Inomata, Masahiro Kawasaki, Kyohei Mukaida +1 · 2 citations
Physics and Astronomy · #astro-ph.CO #hep-ph
paper · pdf · doi:10.1103/physrevd.97.043514
published as Phys. Rev. D 97, 043514 (2018) · 11 pages, 5 figures, v2: published version
arxiv created 2018/02/18 · arxiv updated 2018/02/21
Primordial Black Hole (PBH) is one of the leading non-particle candidates for dark matter (DM). Although several observations severely constrain the amount of PBHs, it is recently pointed out that there is an uncertainty on the microlensing constraints below ∼ 10-10 M_\odot which was ignored originally but may weaken the constraints significantly. In this paper, facing this uncertainty, we investigate the possibility that PBHs can make up all DM in a broad mass spectrum. Moreover, we propose a concrete inflation model which can simultaneously produce PBHs for all DM in a broad mass spectrum around \mathcal O(10-13) M_\odot and PBHs for LIGO events in a sharp mass spectrum at \mathcal O(10) M_\odot.