J/ψ production in Au-Au collisions at √sNN = 200 GeV
Physical Review C - Nuclear Physics 69 巻 1 号
014901-1-014901-10 頁
2004-01-26 発行
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| ファイル情報(添付) | |
| タイトル ( eng ) |
J/ψ production in Au-Au collisions at √sNN = 200 GeV
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| 作成者 |
PHENIX Collaboration
Enokizono Akitomo
Hachiya Takashi
Kohama Takeshi
Nakamura Tomoaki
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| 収録物名 |
Physical Review C - Nuclear Physics
|
| 巻 | 69 |
| 号 | 1 |
| 開始ページ | 014901-1 |
| 終了ページ | 014901-10 |
| 抄録 |
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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| 著者キーワード |
heavy ion-nucleus reactions
quark production
charm particles
psi mesons
gold
nuclear matter
quark-gluon plasma
|
| 言語 |
英語
|
| 資源タイプ | 学術雑誌論文 |
| 出版者 |
American Physical Society
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| 発行日 | 2004-01-26 |
| 権利情報 |
Copyright (c) 2004 The American Physical Society.
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| 出版タイプ | Version of Record（出版社版。早期公開を含む） |
| アクセス権 | オープンアクセス |
| 収録物識別子 |
[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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