2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/41848This talk discusses theoretical aspects of tests of CPT and Lorentz Symmetry that will in principle be possible with trapped antihydrogen. The framework is the standard-model extension, which admits minuscule violations of CPT and Lorentz symmetry in a general manner without giving up other features of the standard model of particle physics. Spectroscopic transitions in hydrogen and antihydrogen that exhibit leading-order effects are identified. Such comparisons of spectral frequencies in antimatter with the corresponding frequencies in regular matter will bound parameter combinations that are not accessible with regular-matter atoms alone.10 pages, latex, invited talk at XIVth Rencontres de Blois on Matter-Antimatter Asymmetry, Chateau de Blois, France, 16-22 June 2002High Energy Physics - Phenomenologytext