Can sterile neutrinos explain the very high energy photons from GRB221009A?

The LHAASO Collaboration has reported their observation of very high energy photons & gamma; ' 18 TeV) from the gamma-ray burst GRB221009A. The sterile neutrino that involves both mixing and a transition magnetic moment may be a viable explanation for these high energy photon events. However, we demonstrate that such a solution is strongly disfavored by the cosmic microwave background and big bang nucleosynthesis in standard cosmology.

Automated summary

The LHAASO Collaboration has observed very high energy photons (18 TeV) from the gamma-ray burst GRB221009A. The presence of a sterile neutrino with both mixing and a transition magnetic moment is proposed to explain these high energy photon events. However, it is demonstrated that this explanation is strongly disfavored by the cosmic microwave background and big bang nucleosynthesis in standard cosmology.