Latest documents http://publikationen.ub.uni-frankfurt.de/index/index/ Mon, 21 Nov 2005 11:50:45 +0100 Mon, 21 Nov 2005 11:50:45 +0100 http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/3227 The statistical coalescence model for the production of open and hidden charm is considered within the canonical ensemble formulation. The data for the J/psi multiplicity in Pb+Pb collisions at 158 A·GeV are used for the model prediction of the open charm yield. We find a strong enhancement of the open charm production, by a factor of about 2 4, over the standard hard-collision model extrapolation from nucleon-nucleon to nucleus-nucleus collisions. A possible mechanism of the open charm enhancement in A+A collisions at the SPS energies is proposed. Mark I. Gorenstein; Andriy P. Kostyuk; Horst Stöcker; Walter Greiner preprint http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/3227 Mon, 21 Nov 2005 11:50:45 +0100 http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/3279 Production of J/psi mesons in heavy ion collisions is considered within the statistical coalescence model. The model is in agreement with the experi- mental data of the NA50 Collaboration for Pb+Pb collisions at 158 A·GeV in a wide centrality range, including the so called anomalous suppression domain. The model description of the J/ psi data requires, however, strong enhancement of the open charm production in central Pb+Pb collisions. This model prediction may be checked in the future SPS runs. Andriy P. Kostyuk; Mark I. Gorenstein; Horst Stöcker; Walter Greiner preprint http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/3279 Thu, 17 Nov 2005 09:56:35 +0100