An improved gamma-ray limit on the density of PBHs

2003/04/29 by A. Barrau, Aurélien Barrau, Barrau, A. +4
Medicine · Physics and Astronomy · #Astrophysics (astro-ph) #FOS: Physical sciences #Medical Imaging Techniques and Applications #astro-ph

paper · pdf · doi:10.48550/arxiv.astro-ph/0304528

To appear in the 28th ICRC conference proceedings

arxiv created 2003/04/29 · openalex publication_date 2003/04/29 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

Gamma-rays are, with antiprotons, a very efficient way to derive upper limits on the density of evaporating black holes. They have been successfully used in the last decades to severely constrain the amount of Primordial Black Holes (PBHs) in our Universe. This article suggests a little refinement, based on the expected background, to improve this limit by a factor of three. The resulting value is : Omega_PBH < 3.3E-9.

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