Born amplitudes in QCD from scalar diagrams

Abstract

We review recent developments for the calculation of Born amplitudes in QCD. This includes the computation of gluon helicity amplitudes from MHV vertices and an approach based on scalar propagators and a set of three- and four-valent vertices. The latter easily generalizes to amplitudes with any number of quark pairs. The quarks may be massless or massive.

Comments: 6 pages, Talk given at QCD 05: 12th International QCD Conference, 4-9 Jul 2005, Montpellier, France