O R 2 0 1 1 ) 0 1 3 Automated one-loop calculations with GoSam

In this talk, the program package G OSAM is presented which can be used for the automated calculation of one-loop amplitudes for multi-particle pro cesses. The integrands are generated in terms of Feynman diagrams and can be reduced by d-dimensiona l integrand-level decomposition, or tensor reduction, or a combination of both. Through vario us examples we show that G OSAM can produce one-loop amplitudes for both QCD and electrowea k theory; model files for theories Beyond the Standard Model can be linked as well.