2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/48737In a new theory, local Lorentz invariance is a low-energy symmetry which no longer holds when a fermion energy E is well above 1 TeV. Here we find that the modified E(p) relation is consistent with observation, and is in fact nearly the same as in Einstein relativity. On the other hand, there is a strong modification of the fermion equation of motion and propagator at ultrahigh energy, which should lead to observable effects.6 pages. Proceedings of CPT-98 Meeting on CPT and Lorentz Symmetry, edited by V.A. Kostelecky (World Scientific, Singapore, 1999)High Energy Physics - Phenomenologytext