Freeze-in gravitational waves and dark matter in warm inflation

TL;DR

This paper explores how warm inflation models can produce distinctive high-frequency gravitational wave signatures and facilitate graviton-portal dark matter production, providing potential observational pathways for early universe physics.

Contribution

It introduces a comparative analysis of gravitational wave spectra and dark matter production in warm inflation with different dissipation mechanisms, highlighting their unique signatures.

Findings

Distinct high-frequency gravitational wave signatures identified

Differences in spectral behavior based on dissipation terms

Potential for probing inflation and dark matter via gravitational waves

Abstract

Recent study [1] has suggested that warm inflation may be realized with a minimal extension of the Standard Model by a single scalar inflaton field with an axion-like coupling to gluons. Motivated by this framework, we investigate the gravitational wave spectrum and graviton-portal dark matter production through the freeze-in process generated during warm inflation scenarios. We perform a comparative analysis for different dissipation terms, focusing on their distinct gravitational wave signatures in the high-frequency regime. Our findings reveal qualitative and quantitative differences in the spectral behavior, offering a preliminary pathway for exploring inflationary and dark matter models through high-frequency gravitational wave signals.