Invisible Neutrino Decays as Origin of TeV Gamma Rays from GRB221009A

TL;DR

This paper proposes that neutrinos produced in gamma-ray bursts decay into axion-like particles, which are then converted into TeV gamma rays, offering a novel explanation for high-energy observations from GRB221009A.

Contribution

It introduces a new scenario where neutrino decays into axion-like particles explain TeV gamma rays, relaxing previous observational constraints.

Findings

Neutrino decay into axion-like particles can produce TeV gamma rays.

The scenario alleviates tension with existing constraints on axion-like particles.

It provides a viable explanation for LHAASO observations of GRB221009A.

Abstract

Recently, the LHAASO collaboration has observed the gamma rays of energies up to ten TeV from the gamma-ray burst GRB221009A, which has stimulated the community of astronomy, particle physics and astrophysics to propose various possible interpretations. In this paper, we put forward a viable scenario that neutrinos are produced together with TeV photons in the gamma-ray burst and gradually decay into the axion-like particles, which are then converted into gamma rays in the galactic magnetic fields. In such a scenario, the tension between previous axion-like particle interpretations and the existing observational constraints on the relevant coupling constant and mass can be relaxed.