Rapidity gaps and color evolution in QCD hard scattering

Abstract We discuss rapidity-gap events between two jets produced at high momentum transfer in ρ ρ scattering, from the point of view of the soft energy flow into the interjet region. We define a gap cross section and, in perturbative QCD (pQCD), resum all the leading logarithms in the soft intermediate energy. We show that the numerical result from our cross section reproduces the shape of the DO and CDF [1–3] experimental data.