Constraining scotogenic dark matter and primordial black holes using gravitational waves

TL;DR

This paper explores how future gravitational wave detectors can impose strict constraints on the properties of scotogenic dark matter and primordial black holes by analyzing induced gravitational waves from early universe curvature fluctuations.

Contribution

It introduces a novel method to constrain dark matter and primordial black hole parameters using gravitational wave signals generated by curvature fluctuations.

Findings

Future GW detectors can significantly restrict DM and PBH mass ranges.

Induced GWs provide a new observational window into early universe phenomena.

Constraints improve understanding of dark matter origins and primordial black hole abundance.

Abstract

The lightest $Z_2$ odd particle in the scotogenic model, referred to as scotogenic dark matter (DM), is a widely studied candidate for DM. This scotogenic DM is generated through well-known thermal processes as well as via the evaporation of primordial black holes (PBHs). Recent reports suggested that the curvature fluctuations of PBHs during an epoch dominated by these entities in the early universe can serve as the source of so-called induced gravitational waves (GWs). In this study, we demonstrate that stringent constraints on the mass of scotogenic DM and PBHs can be obtained through the detection of induced GWs using future detectors.