Recent news and results in the computation of NLO processes with new techniques

I illustrate new techniques and recently obtained results in the computation of perturbative QCD processes at the NLO accuracyComment: 6 pages, 2 figures, 3 tables, contribution to the proceedings of the 10th Hellenic School on Elementary Particle Physics and Gravity, Corfu 201

Two-loop off-shell QCD amplitudes in FDR

We link the FDR treatment of ultraviolet (UV) divergences to dimensional regularization up to two loops in QCD. This allows us to derive the one-loop and two-loop coupling constant and quark mass shifts necessary to translate infrared finite quantities computed in FDR to the MSbar renormalization scheme. As a by-product of our analysis, we solve a problem analogous to the breakdown of unitarity in the Four Dimensional Helicity (FDH) method beyond one loop. A fix to FDH is then presented that preserves the renormalizability properties of QCD without introducing evanescent quantities.Comment: 25 pages, 6 figure