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We consider the gluon propagator $D(p^2)$ at various lattice sizes andspacings in the case of pure SU(3) Yang-Mills gauge theories using the Landaugauge fixing. We discuss a class of fits in the infrared region in order to(in)validate the tree level analytical prediction in terms of the (Refined)Gribov-Zwanziger framework. It turns out that an important role is played bythe presence of the widely studied dimension two gluon condensate$\braket{A^2}$. Including this effect allows to obtain an acceptable fit up to1 \'{a} 1.5 GeV, while corroborating the Refined Gribov-Zwanziger predictionfor the gluon propagator. We also discuss the infinite volume extrapolation,leading to the estimate $D(0)=8.3\pm0.5\text{GeV}^{-2}$. As a byproduct, we canalso provide the prediction $\braket{g^2 A^2}\approx 3\text{GeV}^2$ obtained atthe renormalization scale $\mu=10\text{GeV}$.

Indirect lattice evidence for the Refined Gribov-Zwanziger formalism and the gluon condensate $\braket{A^2}$ in the Landau gauge