The structure of the Bern-Kosower integrand for the \(N\)-gluon amplitude
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An ambiguity inherent in the partial integration procedure leading to the Bern-Kosower rules is fixed in a way which preserves the complete permutation symmetry in the scattering states. This leads to a canonical version of the Bern-Kosower representation for the one-loop \(N\)-photon/gluon amplitudes, and to a natural decomposition of those amplitudes into permutation symmetric gauge invariant partial amplitudes. This decomposition exhibits a simple recursive structure.
KeywordsIntegration Procedure Partial Amplitude Recursive Structure Permutation Symmetry Gluon Amplitude
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