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arXiv · 2503.19227

Ultra-High-Energy Neutrinos from Primordial Black Holes

Alexandra P. Klipfel·David I. Kaiser
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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 ${\cal O} (1 - 10^2) \, {\rm PeV}$, are consistent with event-rate expectations if a significant fraction of the dark matter consists of PBHs.

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Alexandra P. Klipfel, David I. Kaiser. 2025-08-01. Ultra-High-Energy Neutrinos from Primordial Black Holes. https://doi.org/10.1103/vnm4-7wdc

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