Dimension two gluon condensates in a variety of gauges and a gauge   invariant Yang-Mills action with a mass
  We give a short overview of our work concerning the dimension two operator A^2 in the Landau gauge and its generalizations to other gauges. We conclude by discussing recent work that leads to a renormalizable gauge invariant action containing a mass parameter, based on the operator F 1/D^2 F. 
D. Dudal, M.A.L. Capri, J.A. Gracey, V.E.R. Lemes, R.F. Sobreiro, S.P.   Sorella, H. Verschelde