2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/183850We discuss the critical properies of the three-dimensional Gross-Neveu model at nonzero temperature and nonzero chemical potential. We also present numerical and analytical results for the in-medium interaction due to scalar meson exchange. Further, we discuss in-medium modifications of mesonic dispersion relations and wavefunctions.9 pages, 5 figures, Contribution to Workshop on Finite Density QCD at Nara, Japan, July 10-12 2003High Energy Physics - Latticetext