2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/39302Basic ingredients of the theory of baryogenesis are reviewed with emphasis on out-of-equilibrium decays of heavy particles. The present use of kinetic theory is explained and some attempts to go beyond the classical Boltzmann equations are discussed.19 pages, 12 figures, talk presented at the International School of Astrophysics D. Chalonge, Erice, December 1999High Energy Physics - Phenomenologytext