2017-12-04

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Speaker: Keisuke Inomata (ICRR)
Title: Double Inflation as a single origin of PBHs for all dark matter and LIGO
Abstract: 
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 
In the seminar, 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 O(10^{-13}) M_\odot 
and PBHs for LIGO events in a sharp mass spectrum at O(10) M_\odot.
This talk is based on our recent paper (arXiv:1711.06129).

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