Gravitational Wave Production During Reheating: From the Inflaton to Primordial Black Holes

2024/11/06 by M. Gross, Essodjolo Kpatcha, Gross, Mathieu +7 · 3 citations
Physics and Astronomy · #Cosmology and Gravitation Theories #Cosmology and Nongalactic Astrophysics (astro-ph.CO) #FOS: Physical sciences #Galaxies: Formation, Evolution, Phenomena #High Energy Physics - Phenomenology (hep-ph) #Pulsars and Gravitational Waves Research

paper · pdf · doi:10.48550/arxiv.2411.04189

openalex publication_date 2024/11/06 · openalex created_date 2024/11/15 · openalex updated_date 2026/07/28

Abstract

We calculate the gravitational waves (GWs) produced by primordial black holes (PBHs) in the presence of the inflaton condensate in the early Universe. Combining the GW production from the evaporation process, the gravitational scattering of the inflaton itself, and the density fluctuations due to the inhomogeneous distribution of PBHs, we propose for the first time a complete coherent analysis of the spectrum, revealing three peaks, one for each source. Three frequency ranges (∼ kHz, GHz, and PHz, respectively) are expected, each giving rise to a similar GW peak amplitude Ω_{\rm GW}. We also compare our predictions with current and future GWs detection experiments.

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