Ultra-high energy cosmic neutrinos from gamma-ray bursts

• Published in: Fundamental research (Beijing) Vol. 4; no. 1; pp. 51 - 56
• Main Authors: Huang, Yanqi, Ma, Bo-Qiang
• Format: Journal Article
• Language: English
• Published: KeAi Communications Co. Ltd 01.01.2024
• Subjects: Cosmic neutrino; CPT-violation of neutrinos; Gamma-ray burst; Lorentz invariance violation; Neutrino and anti-neutrino asymmetry
• ISSN: 2667-3258; 2667-3258
• DOI: 10.1016/j.fmre.2022.05.022

Based on the recent association of IceCube TeV and PeV neutrino events with gamma-ray bursts (GRBs) by considering the Lorentz violation of neutrinos, we provide a new estimate on the GRB neutrino flux with a more significant result compared to the previous constraint by the IceCube Collaboration. Among these 24 neutrino “shower” events above 60 TeV, 12 events are associated with GRBs. Such a result is compatible with the prediction from GRB fireball models. Analysis of track events provides a consistent result with the shower events to associate high energy cosmic neutrinos with GRBs under the same Lorentz violation features of neutrinos. We also make a background estimation and reveal GRBs as a significant source for the ultra-high energy IceCube neutrino events. Our work supports the Lorentz violation and CPT-violation of neutrinos, indicating new physics beyond relativity.