Calculating Scattering Amplitudes Efficiently

Details Calculating Scattering Amplitudes Efficiently Calculating Scattering Amplitudes Efficiently

1996-01-29

arxiv.org/abs/hep-ph/9601359v2

Physics

High Energy Physics

High Energy Physics - Phenomenology

LaTex, 45 pages with 11 encapsulated figures. Presented at the Theoretical Advanced Study Institute (TASI 95), Boulder, CO, Ju

Scientific paper

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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