Confinement studies in QCD with Dyson-Schwinger equations

We provide a study of quantum chromodynamics with the technique of Dyson-Schwinger equations in differential form. In this way, we are able to approach the non-perturbative limit and recover, with some approximations, the 't Hooft limit of the theory. Quark mass in the propagator term goes off-shell at low-energies signaling confinement. A condition for such occurrence in the theory is provided.Comment: 5 pages, 2 figures. Talk given at 23th International Conference in Quantum Chromodynamics (QCD 20, 35th anniversary), 27-30 October 2020, Montpellier - F