2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/183872We introduce a new approach to analyze the phase diagram of QCD at finite chemical potential and temperature, test it in the Gross-Neveu model at finite baryon density, and apply it to the study of the chemical potential-temperature phase diagram of QCD with four degenerate flavors of Kogut-Susskind type.21 pages, 9 figures. Some comments and references addedHigh Energy Physics - LatticeHigh Energy Physics - Phenomenologytext