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Automation of next-to-leading order computations in QCD: the FKS subtraction

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arxiv 0908.4272 v2 pith:3ZUYEPME submitted 2009-08-28 hep-ph

Rikkert Frederix , Stefano Frixione , Fabio Maltoni , Tim Stelzer This is my paper · ORCID
classification hep-ph
keywords subtractionautomationcomputationimplementationmadgraphmodelnext-to-leadingorder
verification ladder T0 review T1 audit T2 compute T3 formal

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We present the complete automation of the universal subtraction formalism proposed by Frixione, Kunszt, and Signer for the computation of any cross section at the next-to-leading order in QCD. Given a process, the only ingredient to be provided externally is the infrared- and ultraviolet-finite contribution of virtual origin. Our implementation, currently restricted to the case of e+e- collisions, is built upon and works in the same way as MadGraph. It is particularly suited to parallel computation, and it can deal with any physical process resulting from a theory implemented in MadGraph, thus including the Standard Model as well as Beyond the Standard Model theories. We give results for some sample processes that document the performances of the implementation, and show in particular how the number of subtraction terms has an extremely mild growth with final-state multiplicity.

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Cited by 10 Pith papers

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