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An improved gamma-ray limit on the density of primordial black holes

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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http://hal.in2p3.fr/in2p3-00020025
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Submitted on : Tuesday, January 27, 2004 - 4:06:12 PM
Last modification on : Thursday, November 19, 2020 - 12:58:38 PM

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A. Barrau, G. Boudoul, L. Derome. An improved gamma-ray limit on the density of primordial black holes. International Cosmic Ray Conference 28 ICRC 2003, Jul 2003, Tsukuba, Japan. pp.1697-1699. ⟨in2p3-00020025⟩

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