Neutrino Origin of LHAASO's 18 TeV GRB221009A Photon

Understand

LHAASO collaboration detected photons with energy above 10 TeV from the most recent gamma-ray burst (GRB), GRB221009A.

• Given the redshift of this event, $z\sim 0.15$, photons of such energy are expected to interact with the diffuse extragalactic background light (EBL) well before reaching Earth.
• In this paper we provide a novel neutrino-related explanation of the most energetic 18 TeV event reported by LHAASO.
• We find that the minimal viable scenario involves both mixing and transition magnetic moment portal between light and sterile neutrinos.