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. 
J. Dias de Deus and R. Ugoccioni (CENTRA/IST, Lisboa)