20,168 research outputs found
Particle rapidity density and collective phenomena in heavy ion collisions
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
Absorption and percolation in the production of J/psi in heavy ion collisions
We present a simple model with string absorption and percolation to describe
the J/psi suppression in heavy ion collisions. The NA50 data are fairly well
explained by the model.Comment: 6 pages, 3 postscript figures include
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