Infrared structure of $e^+e^- \to 3$ jets at NNLO - the $C_F^2$   contribution
  We discuss the infrared structure of e+e- -> 2 and 3 jets at NNLO in QCD perturbation theory and describe subtraction terms that render the separate parton-level contributions finite. As a first result, we find that the NNLO C_F^2 contribution to the first moment of the Thrust distribution <1-T> = -20.4 +/- 4. 
A. Gehrmann-De Ridder, T. Gehrmann and E.W.N. Glover