On-shell methods in gauge field theories, in particular multi-leg calculations in the Standard model N=4,2 and 1 SUSY theories.
Unitarity (in 4 and D-dimensions),
CSW rules and BFCW recursion relations, with applications to one-loop amplitudes.
NNLO and NNNLO calculations in QCD, Higgs production at the LHC.
D Dimensional Unitarity,Higgs -> gluons amplitudes