k_perp-factorization for Hard Processes on Nuclei in the Saturation   Regime
  We discuss applications of the recently developed nonlinear k_perp--factorization for hard processes on nuclei. The starting point is the color dipole approach which allows to introduce the concept of a collective unintegrated nuclear gluon distribution. We focus on single--jet spectra, which depend on the collective nuclear glue in a nonlinear manner. We briefly comment on the Cronin effect. 
W. Sch\"afer