2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/48554A simple confining separable interaction Ansatz for the rainbow-ladder truncated QCD Dyson-Schwinger equations is used to study quark deconfinement and meson states at finite temperature. The model is fixed at T=0 to implement quark confinement while preserving the Goldstone mechanism for the $π$. Within the Matsubara formalism, a very slow temperature dependence is found for the $π$ and $ρ$ meson masses $M_H(T)$ until near the deconfinement temperature $T_c=143$ MeV. Related to rapid decrease of the dynamically-generated quark mass function for $T>T_c$, this model produces $π$ and $ρ$ masses that rise significantly and are better interpreted as spatial screening masses. The $T$-dependent screening mass defect $ΔM_H = 2πT-M_H(T)$ is compared to results of lattice gauge theory simulations and also to those of an infrared dominant analytic model.6 pages, 2 figures. Invited talk at the XI International Conference "Problems of Quantum Field Theory", Dubna, July 13-17, 1998High Energy Physics - PhenomenologyHigh Energy Physics - LatticeNuclear Theorytext