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Can Sterile Neutrino Explain Very High Energy Photons from GRB221009A?

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arxiv 2301.03523 v2 pith:BUXLJ4TQ submitted 2023-01-09 hep-ph

classification hep-ph
keywords energyhighgrb221009aneutrinophotonssterileverybackground
verification ladder T0 review T1 audit T2 compute T3 formal
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abstract

The LHAASO collaboration has reported their observation of very high energy photons ($E^{max}_\gamma \simeq 18$ TeV) from the gamma-ray burst GRB221009A. The sterile neutrino that involves both mixing and 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 (CMB) and Big Bang nucleosynthesis (BBN) in the standard cosmology.

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  1. Carpet-3 detection of a photon-like air shower with estimated primary energy above 100 TeV in a spatial and temporal coincidence with GRB 221009A

    astro-ph.HE 2025-02 conditional novelty 6.0 of 10

    Carpet-3 reports a photon-like air shower with estimated energy around 300 TeV arriving from the direction of GRB 221009A about 75 minutes after the trigger, with a coincidence probability of about 0.9 percent.

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