The rational parts of one-loop QCD amplitudes II: The five-gluon case

Abstract

The rational parts of 5-gluon one-loop amplitudes are computed by using the newly developed method for computing the rational parts directly from Feynman integrals. We found complete agreement with the previously well-known results of Bern, Dixon and Kosower obtained by using the string theory method. Intermediate results for some combinations of Feynman diagrams are presented in order to show the efficiency of the method and the local cancellation between different contributions.

arXiv comment25 pages, 16 figures and LaTeX file; minor corrections, references added, to be published in Nucl. Phys. B

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• Numerical Evaluation of Six-Photon Amplitudes
• Optimizing the Reduction of One-Loop Amplitudes
• One-loop phi-MHV amplitudes using the unitarity bootstrap
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• The MHV Lagrangian for a spontaneously broken gauge theory
• LHC constraints and potential on resonant monotop production
• The last of the seven-parton tree amplitudes