Automated one-loop calculations with GOSAM

作者：Cullen Gavin^*; Greiner Nicolas; Heinrich Gudrun; Luisoni Gionata; Mastrolia Pierpaolo; Ossola Giovanni; Reiter Thomas; Tramontano Francesco

来源：European Physical Journal C, 2012, 72(3): 1889.

DOI：10.1140/epjc/s10052-012-1889-1

We present the program package GOSAM which is designed for the automated calculation of one-loop amplitudes for multi-particle processes in renormalisable quantum field theories. The amplitudes, which are generated in terms of Feynman diagrams, can be reduced using either D-dimensional integrand-level decomposition or tensor reduction. GOSAM can be used to calculate one-loop QCD and/or electroweak corrections to Standard Model processes and offers the flexibility to link model files for theories Beyond the Standard Model. A standard interface to programs calculating real radiation is also implemented. We demonstrate the flexibility of the program by presenting examples of processes with up to six external legs attached to the loop.

• 出版日期2012-3