Axion-like Particles and their Possible Impact on the Very High-Energy Spectrum of M87 Observed by LHAASO

A. Pratts, D Avila Rojas, J. Serna-Franco +2

The detection of very high-energy (VHE) gamma rays from the active galaxy M87 by LHAASO, showing a possible spectral hardening around $20$ TeV, motivates the search for new physics…