Journal
NUCLEAR PHYSICS B
Volume 571, Issue 1-2, Pages 51-70Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/S0550-3213(99)00809-3
Keywords
color decompositions; perturbative QCD
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Recently, a color decomposition using structure constants was introduced for purely gluonic tree amplitudes, in a compact form involving only the linearly independent subamplitudes. We give two proofs that this decomposition holds for an arbitrary number of gluons, We also present and prove similar decompositions at one loop, both for purl gluon amplitudes and for amplitudes with an external quark-antiquark pair. (C) 2000 Elsevier Science B.V. All rights reserved.
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