The interpretation of experimental results at RHIC and in the future also at
LHC requires very reliable and realistic models.
Considerable effort has been devoted to the development of such models during
the past decade, many of them being heavily used in order to analyze data.
There are, however, serious inconsistencies in the above-mentioned approaches.
In this paper, we will introduce a fully self-consistent formulation of the
multiple-scattering scheme in the framework of a Gribov-Regge type effective
theory.Comment: Invited talk given at the International Workshop on the Physics of
the Quark Gluon Plasma, Palaiseau, France, September 4-7, 200
