J/ψ production in Au-Au collisions at √sNN = 200 GeV
Physical Review C - Nuclear Physics Volume 69 Issue 1
Page 014901-1-014901-10
published_at 2004-01-26
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| File | |
| Title ( eng ) |
J/ψ production in Au-Au collisions at √sNN = 200 GeV
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| Creator |
PHENIX Collaboration
Enokizono Akitomo
Hachiya Takashi
Kohama Takeshi
Nakamura Tomoaki
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| Source Title |
Physical Review C - Nuclear Physics
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| Volume | 69 |
| Issue | 1 |
| Start Page | 014901-1 |
| End Page | 014901-10 |
| Abstract |
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.
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| Keywords |
heavy ion-nucleus reactions
quark production
charm particles
psi mesons
gold
nuclear matter
quark-gluon plasma
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| Language |
eng
|
| Resource Type | journal article |
| Publisher |
American Physical Society
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| Date of Issued | 2004-01-26 |
| Rights |
Copyright (c) 2004 The American Physical Society.
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| Publish Type | Version of Record |
| Access Rights | open access |
| Source Identifier |
[ISSN] 0556-2813
[DOI] 10.1103/PhysRevC.69.014901
[NCID] AA00773613
[DOI] http://dx.doi.org/10.1103/PhysRevC.69.014901
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