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GoSam: A program for automated one-loop Calculations

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arxiv 1111.6534 v1 pith:RHGVE7WQ submitted 2011-11-28 hep-ph

classification hep-ph
keywords gosamone-loopprogramamplitudesautomatedmodelstandardaims
verification ladder T0 review T1 audit T2 compute T3 formal
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The program package GoSam is presented which aims at the automated calculation of one-loop amplitudes for multi-particle processes. The amplitudes are generated in terms of Feynman diagrams and can be reduced using either D-dimensional integrand-level decomposition or tensor reduction, or a combination of both. GoSam can be used to calculate one-loop corrections to both QCD and electroweak theory, and model files for theories Beyond the Standard Model can be linked as well. A standard interface to programs calculating real radiation is also included. The flexibility of the program is demonstrated by various examples.

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  1. Towards a Fully Automated Differential $\text{NNLO}_\text{EW}$ Generator for Lepton Colliders

    hep-ph 2025-12 unverdicted novelty 5.0 of 10

    A framework based on the YFS theorem enables process-independent local IR subtraction and resummation matching for automated NNLO_EW calculations in lepton collider processes.

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