Abstract
The approach to interactions of hadrons, virtual photons and nuclei with nuclei, proposed by Gribov, is reviewed and applied to description of nuclear structure functions in the small x region and heavy ion collisions. The problem of saturation of parton densities in deep inelastic scattering (DIS) in the limit x → 0 is discussed and its relation to heavy ion collisions at very high energies is investigated. It is emphasized that the shadowing effects are important in a definite kinematical region. It is shown that the prediction of the Glauber model for densities of hadrons produced in the central rapidity region in nucleus–nucleus interactions are modified due to shadowing of small-x-partons. Calculations show that shadowing effects are important at RHIC energies, but the “saturation” at these energies is not achieved yet. Production of particles with large transverse momenta and jets both in Au-Au and D-Au collisions is discussed.
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