A nice paper

Today in arxiv a new paper appeared by Dudal, Gracey, Sorella, Vandersickel and Verschelde here. This is a cooperation between Universities in Belgium, UK and Brazil. These authors have found a way to keep alive the Gribov-Zwanziger scenario by working out an extended Yang-Mills Lagrangian. Indeed, by taking into account the recent lattice results, these authors modify Yang-Mills Lagrangian to be consistent with them by adding meaningful terms that maintain renormalizability and prove that in this way the Gribov-Zwanziger scenario survives.

This work is a continuation of other interesting works by the same authors. The only point to be emphasized is that in this case we lose a minimality criterion that would imply the formation of a mass gap through the dynamics of the theory itself. This latter point seems the one supported by lattice computations as we discussed here.