2003/05/31 by S. S. Adler, Stephen Adler, S. Afanasiev +98 · 2 citations
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #nucl-ex
paper · pdf · doi:10.1103/physrevc.69.014901
published as Phys.Rev.C69:014901,2004 · 325 authors, 11 pages text, 6 figures, 4 tables, RevTeX 4. Accepted for publication as a regular article in Physical Review C. This version has minor changes to respond to referee suggestions. Plain text data tables for the points plotted in figures for this and previous PHENIX publications are publicly available at http://www.phenix.bnl.gov/papers.html
arxiv created 2003/09/06 · openalex publication_date 2004/01/26 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
First results on charm quarkonia production in heavy ion collisions at the Relativistic Heavy Ion Collider (RHIC) are presented. The yield of J∕\ensuremathψ's measured in the PHENIX experiment via electron-positron decay pairs at midrapidity for Au-Au reactions at √sNN=200\phantom\rule0.3em0exGeV is analyzed as a function of collision centrality. For this analysis we have studied 49.3\ifmmode×\else\texttimes\fi106 minimum bias Au-Au reactions. We present the J∕\ensuremathψ invariant yield dN∕dy for peripheral and midcentral reactions. For the most central collisions where we observe no signal above background, we quote 90% confidence level upper limits. We compare these results with our J∕\ensuremathψ measurement from proton-proton reactions at the same energy. We find that our measurements are not consistent with models that predict strong enhancement relative to binary collision scaling.