2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/199366We briefly describe the construction of a renormalizable gauge model based on the nonlocal gauge invariant mass operator F1/D^2F. We also take a look at the unitarity of the resulting model.Talk given at 9th Workshop on Non-Perturbative Quantum Chromodynamics, Paris, France, 4-8 Jun 2007High Energy Physics - Theorytext