Rapidity gaps at HERA and the Tevatron from soft colour exchanges
  Models based on soft colour exchanges to rearrange colour strings in the final state provide a general framework for both diffractive and non-diffractive events in ep and hadron-hadron collisions. We study two such models and find that they can reproduce rapidity gap data from both HERA and the Tevatron. We also discuss the influence of parton cascades and multiple interactions on the results. 
R. Enberg, G. Ingelman, N. Timneanu