Nonlocal lagrangians and mass generation for gauge fields

In this paper we study the nonabelian, gauge invariant and asymptotically free quantum gauge theory with a mass parameter introduced in hep-th/0605050. We develop the Feynman diagram technique, calculate the mass and coupling constant renormalizations and the effective action at the one--loop order. Using the BRST technique we also prove that the theory is renormalizable within the dimensional regularization framework.