Unraveling Freeze-in Dark matter through the echoes of gravitational waves

TL;DR

This paper proposes that gravitational waves generated during the freeze-in production of dark matter could serve as a new observational probe, enabling tests of dark matter models beyond current detection methods.

Contribution

It introduces a novel gravitational wave signature from freeze-in dark matter production, providing a new way to test dark matter theories with future high-frequency gravitational wave detectors.

Findings

Gravitational waves can be generated during freeze-in dark matter production.

Future high-frequency gravitational wave experiments could detect these signals.

This method offers a new avenue to test dark matter models beyond traditional experiments.

Abstract

In the quest to unravel the dark sector, feebly interacting freeze-in dark matter presents an intriguing possibility, plausibly explaining the consistent null results from various dark matter experiments. We propose a unique imprint in the form of gravitational waves generated during the freeze-in production of dark matter from heavy particle decay in the early universe. This characteristic gravitational wave signature can serve as a powerful probe for freeze-in dark matter. Our study indicates that future high-frequency gravitational wave experiments can detect these waves, offering a novel avenue to critically test the underlying conditions and requirements of this dark matter paradigm, which typically lie beyond the reach of current and planned dark matter detection experiments.