J/ψ production in Au-Au collisions at √sNN=200 GeV

Adler, S. S. ; Kapoor, S. S. ; et., al (2004) J/ψ production in Au-Au collisions at √sNN=200 GeV Physical Review C, 69 (1). 014901_1-014901_10. ISSN 0556-2813

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Official URL: http://prc.aps.org/abstract/PRC/v69/i1/e014901

Related URL: http://dx.doi.org/10.1103/PhysRevC.69.014901


First results on charm quarkonia production in heavy ion collisions at the Relativistic Heavy Ion Collider (RHIC) are presented. The yield of J/ψ's measured in the PHENIX experiment via electron-positron decay pairs at midrapidity for Au-Au reactions at √sNN=200 GeV is analyzed as a function of collision centrality. For this analysis we have studied 49.3×106 minimum bias Au-Au reactions. We present the J/ψ 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/ψ 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.

Item Type:Article
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ID Code:16710
Deposited On:15 Nov 2010 13:25
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