2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/39453The dynamics in QCD with different number of fermion flavors N_f is discussed. The emphasis is on the description of the conformal phase transition with respect to N_f separating a phase with no confinement and chiral symmetry breaking and a phase with confinement and with chiral symmetry breaking.12 pages, LaTeX, 1 eps figure. Talk given at the TMU-Yale Symposium on Dynamics of Gauge Fields, Tokyo, December 13-15, 1999. One reference is addedHigh Energy Physics - Phenomenologytext