2024/10/29 by José María Pérez-Poyatos, Pérez-Poyatos, José María, Verónica Sanz +1
Medicine · Physics and Astronomy · #Biofield Effects and Biophysics #Cosmology and Gravitation Theories #Cosmology and Nongalactic Astrophysics (astro-ph.CO) #Dark Matter and Cosmic Phenomena #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph)
paper · pdf · doi:10.48550/arxiv.2410.22094
openalex publication_date 2024/10/29 · openalex created_date 2024/11/15 · openalex updated_date 2026/07/28
We investigate the production of dark radiation (DR) from axions and axion-like particles (ALPs) as potential origins of dark matter. Focusing on the dark matter misalignment mechanism, we examine non-thermal, pre-inflationary scenarios that could lead to the generation of DR. A key part of our analysis involves a Bayesian approach to confront ALP parameter space with current cosmological data. Additionally, we explore whether DR production could offer solutions to persistent cosmological anomalies, particularly those related to the Hubble constant H0 tension and the S8 parameter discrepancy. Our findings aim to shed new light on the role of ALPs in addressing these open issues in cosmology.