Multipomeron Cuts and Hard Processes on Nuclei

摘要

With nuclear targets comes a new scale into the pQCD description of hard processes– the saturation scale. In the saturation regime, the familiar linear k1–factorization breaks downand must be replaced by a nonlinear k1–factorization, which accounts for absorptive and multiplescattering corrections to the hard process. Predictions for partial cross sections corresponding toa fixed number of cut Pomerons (the topological cross sections) can be obtained in a surprisinglystraightforward manner. We discuss some applications to deep inelastic scattering.