2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/40944After an introduction to the phases of QCD at high density and zero temperature, we introduce the effective lagrangian for the CFL phase and discuss the perturbative evaluation of its parametersInvited talk at the Conference on Compact Stars in the QCD Phase Diagram, Copenhagen, August 15-18, 2001. LateX file, pages 16, no figuresHigh Energy Physics - PhenomenologyHigh Energy Physics - TheoryNuclear Theorytext