2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/42858We report on recent results on the Quantum Field Theory of mixed particles. The quantization procedure is discussed in detail, both for fermions and for bosons and the unitary inequivalence of the flavor and mass representations is proved. Oscillation formulas exhibiting corrections with respect to the usual quantum mechanical ones are then derived.24 pages, 3 figures. Presented at "Symmetries in Science XIII", Kloster Mehrerau, Bregenz, Austria - July 20-24, 2003High Energy Physics - Phenomenologytext