A 300 TeV photon from GRB 221009A should have been absorbed by the cosmic microwave background. Two Italian researchers propose axion-like particles and a violation of Lorentz invariance to explain its survival, but caution that a single event is not a discovery.
Astrophysicists Propose Axions and Lorentz Violation to Explain 300 TeV Photon
A 300 TeV photon from GRB 221009A should have been absorbed by the cosmic microwave background. Two Italian researchers propose axion-like particles and a violation of Lorentz invariance to explain its survival, but caution that a single event is not a discovery.
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