2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/47014Ces notes de cours visent a decrire de maniere pedagogique certaines extensions populaires du modele standard des interactions fortes et electrofaibless. Les sujets abordes comprennent le secteur de Higgs, le modele symetrique gauche-droit, la grande unification et la supersymetrie. L'accent est mis sur les consequences phenomenologiques et les methodes d'investigation. [These lecture notes are intended as a pedagogical introduction to several popular extensions of the standard model of strong and electroweak interactions. The topics include the Higgs sector, the left-right symmetric model, grand unification and supersymmetry. Phenomenological consequences and search procedures are emphasized.]106 pages, in French, lectures given at the Spring School on High Energy Physics, Ecole des Mines de Nantes, France, 14-25 April 1997High Energy Physics - PhenomenologyHigh Energy Physics - ExperimentHigh Energy Physics - Theorytext