A 300 TeV photon from a powerful gamma-ray burst should never have reached the Earth. Scientists have examined two hypothetical effects - axion-like particles and a violation of Lorentz invariance - that could allow such a photon to survive. 🧪⚛️ physicsworld.com/a/scientists...
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Scientists explain how a 300 TeV photon could reach Earth – Physics World
A mysterious signal from a powerful gamma-ray burst may reveal how exotic particles and altered physics could let extreme radiation cross the universe