Using the lack of a spectral cutoff in seven bright gamma-ray sources, HAWC constrains the Lorentz-violating energy scale E_LIV^(1) to be above 1.5e31 eV, 60 times stronger than prior limits.
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Constraints on Lorentz invariance violation using HAWC observations above 100 TeV
Using the lack of a spectral cutoff in seven bright gamma-ray sources, HAWC constrains the Lorentz-violating energy scale E_LIV^(1) to be above 1.5e31 eV, 60 times stronger than prior limits.