Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2002-09-23
Phys.Rev. D67 (2003) 014026
Physics
High Energy Physics
High Energy Physics - Phenomenology
23 pages, 11 figures, version to appear on Phys. Rev. D
Scientific paper
10.1103/PhysRevD.67.014026
We introduce a new color decomposition for multi-parton 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 multi-jet processes, which are the principal backgrounds to signals of new physics at colliders.
Maltoni Fabio
Paul Kallol
Stelzer Tim
Willenbrock Scott
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