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Revealing the black body regime of small x DIS through final state signals

We derive the major characteristics of inclusive and diffractive final states in Deep Inelastic Scattering off heavy nuclei for the high energy (small x) kinematics in which the limit of complete absorption is reached for the dominant hadronic fluctuations in the virtual photon (the black body limit of the process). Both the longitudinal and transverse distributions of the leading hadrons are found to be strikingly different from the corresponding ones within the leading twist approximation, and hence provide unambiguous signals for the onset of the black body limit.