paper

Exploring the NANOGrav Signal and Planet-mass Primordial Black Holes through Higgs Inflation

arXiv:2308.14688 · doi:10.1088/1475-7516/2024/06/043

Abstract

The data recently released by the North American Nanohertz Observatory for Gravitational Waves (NANOGrav) provides compelling evidence supporting the existence of a stochastic signal that aligns with a gravitational-wave background. We show that the scalar-induced gravitational waves from the Higgs inflation model with the parametric amplification mechanism can explain this signal. Such a gravitational-wave background naturally predicts the substantial existence of planet-mass primordial black holes, which can be planet 9 in our solar system and the lensing objects for the ultrashort-timescale microlensing events observed by the Optical Gravitational Lensing Experiment. Therefore, the NANOGrav signal, the potential Planet 9 in our solar system, and the Optical Gravitational Lensing Experiment can be explained within the framework of Higgs inflation.

23 pages, 3 figures, accepted by JCAP

References in corpus (108)

Cited by in corpus (22)