1998/07/31 by N. Armesto, A. Capella, E. G. Ferreiro · 5 citations
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph
paper · pdf · doi:10.1103/physrevc.59.395
published as Phys.Rev.C59:395-404,1999 · 31 pages, LaTeX, 9 postscript figures included using epsfig; references updated and comments added; final version to appear in Phys. Rev. C
arxiv created 1998/10/23 · openalex publication_date 1999/01/01 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
In the framework of a model based on nuclear absorption plus comover interaction, we compute the ET distribution of the J/\ensuremathψ in PbPb collisions at SPS and compare it with available NA50 data. Our analysis suggests that the existence of new physics (deconfinement phase transition) in the region ET\ensuremath\lesssim100 GeV is unlikely and that signals of new physics should rather be searched in the region ET\ensuremath\gtrsim100 GeV. The ET dependence of the J/\ensuremathψ transverse momentum has been computed. At large ET it turns out to be much flatter in the comover approach than in a phase transition framework. Estimates of the J/\ensuremathψ suppression at RHIC and LHC energies are also given.