paper

Ultra-High-Energy Neutrinos from Primordial Black Holes

arXiv:2503.19227 · doi:10.1103/vnm4-7wdc

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 , are consistent with event-rate expectations if a significant fraction of the dark matter consists of PBHs.

5pp, 2 figures, plus appendix. Minor revisions to match published version, forthcoming in Physical Review Letters

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