Particle densities in heavy ion collisions at high energy and the dual string model

We analyse recent results on charged particle pseudo-rapidity densities from RHIC in the framework of the Dual String Model, in particular when including string fusion. The model, in a simple way, agrees with all the existing data and is consistent with the presence of the percolation transition to the Quark–Gluon Plasma already at the CERN–SPS.