Joint photon-electron Lorentz violation parameter plane from LHAASO data

The Large High Altitude Air Shower Observatory (LHAASO) is one of the most sensitive gamma-ray detector arrays, whose ultrahigh-energy (UHE) work bands not only help to study origin and acceleration mechanism UHE cosmic rays, but also provide opportunity test fundamental physics concepts such as Lorentz symmetry. LHAASO directly observes 1.42PeV highest-energy photon. By adopting synchrotion self-Compton model, suggests that 1.12PeV high-energy photon from Crab Nebula corresponds a 2.3PeV electron. We decay electron perform joint analysis on two-dimensional violation (LV) parameter plane. Our systematic comprehensive, we naturally get strictest constraints merely considering LV effect in decay. result permits space for new beyond relativity.