Technique for loop calculations in non-Abelian gauge theories with applications to a five gluon amplitude

Abstract

A powerful tool for calculations in non-Abelian gauge theories is obtained by combining the background field gauge, the helicity basis, and the color decomposition methods. It has reproduced the one-loop calculation of the five-gluon amplitudes in QCD, is applicable to electroweak processes, and extendable to two-loop calculations.