On the reanimation of a local BRST invariance in the (Refined) Gribov-Zwanziger formalism

Understand

We localize a previously established nonlocal BRST invariance of the Gribov-Zwanziger (GZ) action by the introduction of additional fields.

• We obtain a modified GZ action with a corresponding local BRST invariance.
• We show that correlation functions of the original elementary GZ fields do not change upon evaluation with the modified partition function.
• We discuss that for vanishing Gribov mass, we are brought back to the original Yang-Mills theory with standard BRST invariance.