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Particle rapidity density and collective phenomena in heavy ion collisions

By R. Ugoccioni and J. Dias de Deus


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. It leads to strict saturation of the particle (pseudo-)rapidity density, normalised to the number of participant nucleons, as that number increases. A comparison with recent WA98 data is presented.Comment: 6 pages, 3 ps figures, Latex2e with amsmath. To appear in the Proceedings of the XXX International Symposium on Multiparticle Dynamics (Lake Balaton, October 2000

Topics: High Energy Physics - Phenomenology
Year: 2001
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