Calculating Scattering Amplitudes Efficiently

1996/01/29 by Lance J. Dixon, Dixon, L. · 15 citations
Physics and Astronomy · #Electromagnetic Scattering and Analysis

paper · pdf · doi:10.48550/arxiv.hep-ph/9601359

Abstract

We review techniques for more efficient computation of perturbative scattering amplitudes in gauge theory, in particular tree and one-loop multi-parton amplitudes in QCD. We emphasize the advantages of (1) using color and helicity information to decompose amplitudes into smaller gauge-invariant pieces, and (2) exploiting the analytic properties of these pieces, namely their cuts and poles. Other useful tools include recursion relations, special gauges and supersymmetric rearrangements.

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