# Extending the search for muon neutrinos coincident with gamma-ray bursts in IceCube data

## TL;DR

This study conducts an all-sky search for muon neutrinos coincident with gamma-ray bursts using IceCube data, aiming to detect evidence of ultra-high energy cosmic ray production, but finds no significant correlation.

## Contribution

It extends previous IceCube searches by including additional years of data and a new Southern Hemisphere analysis, improving constraints on GRB neutrino models.

## Key findings

- No significant neutrino-GRB correlation detected
- New constraints placed on GRB neutrino production models
- Enhanced sensitivity to high-energy neutrinos achieved

## Abstract

We present an all-sky search for muon neutrinos produced during the prompt $\gamma$-ray emission of 1172 gamma-ray bursts (GRBs) with the IceCube Neutrino Observatory. The detection of these neutrinos would constitute evidence for ultra-high energy cosmic ray (UHECR) production in GRBs, as interactions between accelerated protons and the prompt $\gamma$-ray field would yield charged pions, which decay to neutrinos. A previously reported search for muon neutrino tracks from Northern Hemisphere GRBs has been extended to include three additional years of IceCube data. A search for such tracks from Southern Hemisphere GRBs in five years of IceCube data has been introduced to enhance our sensitivity to the highest energy neutrinos. No significant correlation between neutrino events and observed GRBs is seen in the new data. Combining this result with previous muon neutrino track searches and a search for cascade signature events from all neutrino flavors, we obtain new constraints for single-zone fireball models of GRB neutrino and UHECR production.