Color-flow decomposition of QCD amplitudes

F. Maltoni, K. Paul, T. Stelzer, S. Willenbrock

Research output: Contribution to journalArticlepeer-review


We introduce a new color decomposition for multiparton amplitudes in QCD, free of fundamental-representation matrices and structure constants. This decomposition has a physical interpretation in terms of the flow of color, which makes it ideal for merging with shower Monte Carlo programs. The color-flow decomposition allows for very efficient evaluation of amplitudes with many quarks and gluons, many times faster than the standard color decomposition based on fundamental-representation matrices. This will increase the speed of event generators for multijet processes, which are the principal backgrounds to signals of new physics at colliders.

Original languageEnglish (US)
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Issue number1
StatePublished - Jan 31 2003

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)


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