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 , are consistent with event-rate expectations if a significant fraction of the dark matter consists of PBHs.
Cite
@article{arxiv.2503.19227,
title = {Ultra-High-Energy Neutrinos from Primordial Black Holes},
author = {Alexandra P. Klipfel and David I. Kaiser},
journal= {arXiv preprint arXiv:2503.19227},
year = {2025}
}
Comments
5pp, 2 figures, plus appendix. Minor revisions to match published version, forthcoming in Physical Review Letters