2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/48364A brief summary is given of recent developments concerning a Lorentz-violating extension of the standard model and its implications for experiments testing Lorentz and CPT symmetry.7 pages, to appear in the Proceedings of Orbis Scientiae 1997-II, Miami, Florida, December 1997High Energy Physics - Phenomenologytext