PreprintCC BY-NC-SA 4.0arXiv
Cosmic-string calorimetry with a 220\,PeV neutrino
Abstract
KM3NeT has reported KM3-230213A, a $220$\,PeV neutrino with no source identified. If it comes from a cosmic-string network, energy conservation makes the event a calorimeter. The flux measures the power the network has spent, not how it emits, and a cusp at critical current can supply that power at unit efficiency. The event gives Gμεp=(2.8−−4.3)×10−11 for fν=0.1. Pulsar timing already reaches 10−10, so one event competes with the arrays. For the branch that still radiates gravitationally, flux and timing together require a third of the network's energy in particles, a share that further events above $100$\,PeV would measure.
Related
- Majorana Neutrino Physics and Matter-Antimatter Asymmetry in Type IIA String Theory
- Vacuum Polarization Energy of a Nonzero Radius Cosmic String Induced Spacetime
- The decay rate of metastable cosmic strings beyond the thin-string approximation
- Quantum superposition of Cosmic String spacetimes
- Diamonds in the sky: the shape of gravitational waves from cosmic string cusps
BibTeX
@misc{lu2026cosmicstring,
title = {{Cosmic-string calorimetry with a 220\,PeV neutrino}},
author = {Bo-Qiang Lu},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.37282},
eprint = {2610.37282},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.37282},
note = {CC BY-NC-SA 4.0},
}
RIS
TY - UNPB
TI - Cosmic-string calorimetry with a 220\,PeV neutrino
AU - Bo-Qiang Lu
PY - 2026
DA - 2026/10/27
PB - arXiv
DO - 10.48550/arxiv.2610.37282
UR - https://arxiv.org/abs/2610.37282
AB - KM3NeT has reported KM3-230213A, a $220$\,PeV neutrino with no source identified. If it comes from a cosmic-string network, energy conservation makes the event a calorimeter. The flux measures the power the network has spent, not how it emits, and a cusp at critical current can supply that power at unit efficiency. The event gives Gμε_p=(2.8−−4.3)×10^−11 for f_ν=0.1. Pulsar timing already reaches 10^−10, so one event competes with the arrays. For the branch that still radiates gravitationally, flux and timing together require a third of the network's energy in particles, a share that further events above $100$\,PeV would measure.
ER -