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Photo of Rikkert Frederix

Rikkert Frederix

Senior lecturer

Photo of Rikkert Frederix

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

Author

  • Rikkert Frederix
  • Stefano Frixione
  • Fabio Maltoni
  • Tim Stelzer

Summary, in English


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.

Publishing year

2009-10

Language

English

Publication/Series

Journal of High Energy Physics

Volume

2009

Issue

10

Document type

Journal article

Publisher

Springer

Topic

  • Subatomic Physics

Keywords

  • Beyond standard model
  • Heavy quark physics
  • NLO computations
  • QCD

Status

Published

ISBN/ISSN/Other

  • ISSN: 1029-8479