2023/10/18 by Shinya Kanemura, Kanemura, Shinya, Kunio Kaneta +1 · 11 citations
Physics and Astronomy · #Cosmology and Gravitation Theories #Pulsars and Gravitational Waves Research #Gamma-ray bursts and supernovae
paper · pdf · doi:10.48550/arxiv.2310.12023
Gravitational waves have become an irreplaceable tool for exploring the post-inflationary universe. Their cosmological and astrophysical origins have been attracting numerous attention. In this Letter, we point out a novel source of ultra-high frequency gravitational waves: the decay of particles produced during the reheating era. We highlight the decay of the Higgs boson as a representative case, showing how it yields a testable gravitational wave spectrum by future observations.