Nonuniversality Aspects of Nonlinear k_\perp-factorization for Hard   Dijets
  The origin of the breaking of conventional linear k_\perp-factorization for hard processes in a nuclear environment is by now well established. The realization of the nonlinear nuclear k_\perp-factorization which emerges instead was found to change from one jet observable to another. Here we demonstrate how the pattern of nonlinear k_\perp-factorization, and especially the role of diffractive interactions, in the production of dijets off nuclei depends on the color properties of the underlying pQCD subprocess. 
N.N. Nikolaev, W. Sch\"afer, B.G. Zakharov