2025/06/19 by Garnica, Yadir, Barranco, J., Ureña-López, Luis A.
Physics and Astronomy · #Astrophysics and Cosmic Phenomena #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #FOS: Physical sciences #General Relativity and Quantum Cosmology (gr-qc) #High Energy Physics - Phenomenology (hep-ph)
paper · pdf · doi:10.48550/arxiv.2506.16579
openalex publication_date 2025/06/19 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
In this work, we show that stimulated decay of axions or axion-like particles (ALP) in black hole superradiance is an efficient way to find and hunt primordial black holes (PBH). When de Broglie's wavelength of the axion/ ALP is comparable or larger than the black hole horizon radius, a large population of them accumulates in the surroundings of the black hole. When these axions or ALPs couple to photons, the bosonic cloud decays into radiation that contributes to the X-ray, visible light, and radio wave background flux that can exceed current observational limits measured at Earth. If the masses are in the interval of 10-3eV<μ<1eV, to be consistent with current observations of microwave background light, we found that the fraction of primordial black holes should be smaller than fPBH < 10-17 for primordial black holes with masses within 10-19 M\odot