Kavli Affiliate: Masahiro Kawasaki
| First 5 Authors: Keisuke Inomata, Masahiro Kawasaki, Kyohei Mukaida, Tsutomu T. Yanagida,
| Summary:
We discuss a possible connection between the recent NANOGrav results and the
primordial black holes (PBHs) for the LIGO-Virgo events. In particular, we
focus on the axion-like curvaton model, which provides a sizable amount of PBHs
and GWs induced by scalar perturbations around the NANOGrav frequency range.
The inevitable non-Gaussianity of this model suppresses the induced GWs
associated with PBHs for the LIGO-Virgo events to be compatible with the
NANOGrav results. We show that the axion-like curvaton model can account for
PBHs for the LIGO-Virgo events and the NANOGrav results simultaneously.
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