2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/43641In this talk, I review the main motivations for expecting new physics at the TeV energy scale, that will be explorable at the CERN Large Hadron Collider.16 pages, 13 figures, Plenary talk, Proceedings IFAE Conference, Torino, April 14-16, 2004; modified one sentence on TC theoriesHigh Energy Physics - Phenomenologytext