Nonlinear κ_{⊥}factorization for forward dijets in deep inelastic scattering off nuclei in the saturation regime
Abstract
We develop a QCD description of the breakup of photons into forward dijets in smallx deep inelastic scattering off nuclei in the saturation regime. Based on the color dipole approach, we derive a multiple scattering expansion for intranuclear distortions of the jetjet transverse momentum spectrum. Special attention is paid to the nonAbelian aspects of the propagation of color dipoles in the nuclear medium. We report a nonlinear k_{⊥}factorization formula for the breakup of photons into dijets in terms of the collective WeizsäckerWilliams glue of nuclei defined in [5, 6]. For hard dijets with the transverse momenta above the saturation scale, the azimuthal decorrelation (acoplanarity) momentum is on the order of the nuclear saturation momentum Q_{A}. For minijets with the transverse momentum below the saturation scale, the nonlinear k_{⊥}factorization predicts a complete disappearance of the jetjet correlation. We comment on possible relevance of the nuclear decorrelation of jets to the experimental data from the STARRHIC Collaboration.
 Publication:

Soviet Journal of Experimental and Theoretical Physics
 Pub Date:
 September 2003
 DOI:
 10.1134/1.1618332
 arXiv:
 arXiv:hepph/0303024
 Bibcode:
 2003JETP...97..441N
 Keywords:

 Transverse Momentum;
 Inelastic Scattering;
 Complete Disappearance;
 Deep Inelastic Scattering;
 Momentum Spectrum;
 High Energy Physics  Phenomenology
 EPrint:
 40 pages, 7 figures