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Antideuterons as a probe of primordial black holes
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In most cosmological models, primordial black holes (PBHs) should have formed in the early Universe. Their Hawking evaporation into particles could eventually lead to the formation of antideuterium nuclei. This paper is devoted to a first computation of this antideuteron flux. The production of these antinuclei is studied with a simple coalescence scheme, and their propagation in the Galaxy is treated with a well-constrained diffusion model. We compare the resulting primary flux to the secondary background, due to the spallation of protons on the interstellar matter. Antideuterons are shown to be a very sensitive probe for primordial black holes in our Galaxy. The next generation of experiments should allow investigators to significantly improve the current upper limit, nor even provide the first evidence of the existence of evaporating black holes.
Forward citations
Cited by 3 Pith papers
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Antinuclei from Primordial Black Holes
AMS-02 antiproton data set the tightest limits yet on Galactic primordial black holes with lognormal mass distributions, and cap the expected antideuteron flux below the reach of upcoming detectors.
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Directional Neutrino Bursts from Spinning and Moving Primordial Black Holes
The paper claims spinning, fast-moving primordial black holes produce collimated high-energy neutrino bursts that IceCube and KM3NeT could detect, and asserts new abundance constraints from their non-observation.
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Constraints on Primordial Black Holes
Updated compilation shows PBHs are tightly constrained across 55 orders of magnitude in mass, ruling out dominant dark matter contributions except in narrow windows, with many limits carrying observational uncertainties.
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