Constructing QCD Loop Amplitudes Using Collinear Limits

Abstract

We discuss how higher-point QCD amplitudes may be constructed from lower point ones by imposing the factorization constraints in the limits as external momenta become collinear. As a particular example, the all-$n$ gluon one-loop amplitude with maximal helicity violation is presented. We also discuss the necessary collinear behavior of the $n$-gluon amplitudes.

Comments: Talk presented at XXII ITEP International Winter School of Physics, February 22 - March 2, 1994, to appear in proceedings, 11 pages (including 1 page figures), UCLA/94/TEP/24