2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/180597We review recent one and two loop MSbar Landau gauge calculations using the Gribov-Zwanziger Lagrangian. The behaviour of the gluon and Faddeev-Popov ghost propagators as well as the renormalization group invariant effective coupling constant is examined in the infrared limit.6 latex pages, talk presented at IRQCD in RioHigh Energy Physics - Theorytext