A unified description of initial and final state interactions in heavy ion collisions

Abstract

We have investigated the gauge field of a fast moving projectile passing through a dense medium. We provide a simple and unified derivation, in light cone gauge, of the gluon production cross-section in proton-nucleus (initial state interactions), and the radiative gluon spectrum of a hard parton produced in a nucleus-nucleus collision (final state interactions). Finally, we discuss the validity of the eikonal approximation in proton-nucleus collisions at RHIC energies.

arXiv comment8 pages, 2 figures. talk given at International Conference on Strong and Electroweak Matter (SEWM 2006), Upton, New York, 10-13 May 2006

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