“…Potential LIV signatures are expected from several different astrophysical contexts. Previous studies have searched for LIV signals using distinct results, such as the time of flight of photons generated in gamma-ray bursts [2,3,4], modulations of the energy spectrum in TeV gamma-rays [5,6,7] and ultra-high energy cosmic rays (UHECR) [8,9], and upper limits on the flux of EeV photons [10,11]. No LIV signal has yet been found [1] and, thus, restrictive limits on the violation have been set [12].…”