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Galactic Cosmic Rays from PBHs and Primordial Spectra with a Scale

A. Barrau·D. Blais·G. Boudoul·D. Polarski
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Abstract

We consider the observational constraints from the detection of antiprotons in the Galaxy on the amount of Primordial Black Holes (PBH) produced from primordial power spectra with a bumpy mass variance. Though essentially equivalent at the present time to the constraints from the diffuse $γ$-ray background, they allow a widely independent approach and they should improve sensibly in the nearby future. We discuss the resulting constraints on inflationary parameters using a Broken Scale Invariance (BSI) model as a concrete example.

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A. Barrau, D. Blais, G. Boudoul, D. Polarski. 2002-11-18. Galactic Cosmic Rays from PBHs and Primordial Spectra with a Scale. https://doi.org/10.1016/s0370-2693(02)03060-5

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