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arXiv · 2210.13120

Axion-Photon Conversion of LHAASO Multi-TeV and PeV Photons

Guangshuai Zhang·Bo-Qiang Ma
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Abstract

The Large High Altitude Air Shower Observatory (LHAASO) has reported the detection of a large number of multi-TeV-scale photon events including also several PeV-scale gamma-ray-photon events with energy as high as 1.4 PeV. The possibility that some of these events may have extragalactic origins is not yet excluded. Here we propose a mechanism for the traveling of very-high-energy (VHE) and ultra-high-energy (UHE) photons based upon the axion-photon conversion scenario, which allows extragalactic above-threshold photons to be detected by observers on the Earth. We show that the axion-photon conversation can serve as an alternative mechanism, besides the threshold anomaly due to Lorentz invariance violation, for the very-high-energy features of the newly observed gamma ray burst GRB 221009A.

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Guangshuai Zhang, Bo-Qiang Ma. 2022-10-24. Axion-Photon Conversion of LHAASO Multi-TeV and PeV Photons. https://doi.org/10.1088/0256-307x%2F40%2F1%2F011401

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