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VOLUME 82 | ISSUE 6 | PAGE 364
Nonlinear \boldsymbol{k_{\perp}}-factorization: a new paradigm for hard QCD processes in a nuclear environment
N. N. Nikolaev+*, W. Schäfer+, B. G. Zakharov*, V. R. Zoller^\triangle
+Institut f. Kernphysik, Forschungszentrum Jülich, D-52425 Jülich, Germany
*L. D. Landau Institute for Theoretical Physics RAS, 117334 Moscow, Chernogolovka, Russia
^{\triangle}Institute for Theoretical and Experimental Physics RAS, 117218 Moscow, Russia

PACS: 11.80.La, 12.38.Bx, 13.85.-t, 13.97.-a
Large thickness of heavy nuclei brings in a new hard scale into the pQCD description of hard processes in a nuclear environment. This new scale breaks the conventional linear k_{\perp}-factorization which must be replaced by a new concept of the nonlinear nuclear k_{\perp}-factorization. Here we review a recent progress in the theory of nonlinear k_{\perp}-factorization. Our focus is on the rôle of diffractive interactions, the variation of the pattern of k_{\perp}-factorization for single-jet processes from deep inelastic scattering to hadron-nucleus collisions and universality classes for dijet production off nuclei.

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