Ultra-High-Energy Neutrinos from Primordial Black Holes

Abstract

The KM3NeT Collaboration recently announced the detection of a neutrino with energy 220 PeV. One possible source of such ultra-high-energy particles is the rapid emission of energetic Hawking radiation from a primordial black hole (PBH) near the end of its evaporation lifetime. The mass distribution for PBHs features a power-law tail for small masses; a small subset of PBHs would be undergoing late-stage evaporation today. We find that recent high-energy neutrino events detected by the IceCube and KM3NeT Collaborations, with energies $\mathcal{O}(1-10^2)\mathrm{PeV}$, are consistent with event-rate expectations if a significant fraction of the dark matter consists of PBHs.

arXiv comment5pp, 2 figures, plus appendix. Minor revisions to match published version, forthcoming in Physical Review Letters

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• Neutrinos from Primordial Black Holes in Theories with Extra Dimensions
• Explaining the PeV Neutrino Fluxes at KM3NeT and IceCube with Quasi-Extremal Primordial Black Holes
• Primordial Black Holes Evaporating before Big Bang Nucleosynthesis
• Hawking Radiation Signatures from Primordial Black Holes Transiting the Inner Solar System: Prospects for Detection
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• Primordial black holes in Randall-Sundrum: Cosmological signatures
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• KM3-230213A and IceCube Neutrino Events from Metastable Dark Matter of Primordial Black Hole Origin