Colour connection structure of (supersymmetric) QCD (2 -> 2) processes

The colour connection structure of QCD (2 --> 2) processes is discussed, wi th emphasis on its application to the supersymmetric 2 parton --> 2 sparton processes, which are currently being implemented in the HERWIG Monte Carlo event generator. The procedure described by Marchesini and Webber is found to be inadequate, and a new method is proposed. However, this alteration i s unlikely to significantly affect the theoretical predictions for soft glu on radiation. A complete list of supersymmetric QCD 2 --> 2 matrix elements and their colour decompositions is presented.