NANOGrav Results and LIGO-Virgo Primordial Black Holes in Axionlike Curvaton Models

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NANOGrav Results and LIGO-Virgo Primordial Black Holes in Axionlike Curvaton Models

Keisuke Inomata, Masahiro Kawasaki, Kyohei Mukaida, and Tsutomu T. Yanagida

Phys. Rev. Lett. 126, 131301 – Published 31 March 2021

Abstract

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 axionlike curvaton model, which provides a sizable amount of PBHs and gravitational waves (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 axionlike curvaton model can account for PBHs for the LIGO-Virgo events and the NANOGrav results simultaneously.

Received 12 November 2020
Revised 12 January 2021
Accepted 25 February 2021

DOI:https://doi.org/10.1103/PhysRevLett.126.131301

Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.

Published by the American Physical Society

Physics Subject Headings (PhySH)

Classical black holes Cosmology Gravitational waves Inflation

Gravitation, Cosmology & Astrophysics

Authors & Affiliations

Keisuke Inomata¹, Masahiro Kawasaki^2,3, Kyohei Mukaida^4,5, and Tsutomu T. Yanagida^6,3

¹Kavli Institute for Cosmological Physics, The University of Chicago, Chicago, Illinois 60637, USA
²ICRR, University of Tokyo, Kashiwa 277-8582, Japan
³Kavli IPMU (WPI), UTIAS, University of Tokyo, Kashiwa 277-8583, Japan
⁴CERN, Theoretical Physics Department, CH-1211 Geneva 23, Switzerland
⁵DESY, Notkestraße 85, D-22607 Hamburg, Germany
⁶T. D. Lee Institute and School of Physics and Astronomy, Shanghai Jiao Tong University, 800 Dongchuan Rd, Shanghai 200240, China