Automated one-loop calculations with GoSam
  In this talk, the program package GOSAM is presented, which can be used for the automated calculation of one-loop amplitudes for multi-particle processes. The integrands are generated in terms of Feynman diagrams and can be reduced by d-dimensional integrand-level decomposition, or tensor reduction, or a combination of both. Through various examples we show that GOSAM can produce one-loop amplitudes for both QCD and electroweak theory; model files for theories Beyond the Standard Model can be linked as well. 
G. Cullen, N. Greiner, G. Heinrich, G. Luisoni, P. Mastrolia, G.   Ossola, T. Reiter, F. Tramontano
hep-ph