Energy Loss and Flow of Heavy Quarks in Au + Au Collisions at √sNN = 200 GeV
Physical Review Letters 98 巻 17 号
172301-1-172301-6 頁
2007-04-24 発行
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| ファイル情報(添付) | |
| タイトル ( eng ) |
Energy Loss and Flow of Heavy Quarks in Au + Au Collisions at √sNN = 200 GeV
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| 作成者 |
PHENIX Collaboration
Enokizono Akitomo
Hachiya Takashi
Harada Hiroyuki
Haruna Kohta
Nakamiya Yoshihide
Nakamura Tomoaki
Ouchida Misaki
Sakata Hirokazu
Tsuchimoto Yuji
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| 収録物名 |
Physical Review Letters
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| 巻 | 98 |
| 号 | 17 |
| 開始ページ | 172301-1 |
| 終了ページ | 172301-6 |
| 抄録 |
The PHENIX experiment at the BNL Relativistic Heavy Ion Collider (RHIC) has measured electrons with 0.3 < pT < 9 GeV/c at midrapidity (|y|<0.35) from heavy-flavor (charm and bottom) decays in Au + Au collisions at √sNN = 200 GeV. The nuclear modification factor RAA relative to p + p collisions shows a strong suppression in central Au + Au collisions, indicating substantial energy loss of heavy quarks in the medium produced at RHIC energies. A large azimuthal anisotropy v2 with respect to the reaction plane is observed for 0.5 < pT < 5 GeV/c indicating substantial heavy-flavor elliptic flow. Both RAA and v2 show a pT dependence different from those of neutral pions. A comparison to transport models which simultaneously describe RAA(pT) and v2(pT) suggests that the viscosity to entropy density ratio is close to the conjectured quantum lower bound, i.e., near a perfect fluid.
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| 言語 |
英語
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| 資源タイプ | 学術雑誌論文 |
| 出版者 |
American Physical Society
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| 発行日 | 2007-04-24 |
| 権利情報 |
Copyright (c) 2007 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] 0031-9007
[DOI] 10.1103/PhysRevLett.98.172301
[NCID] AA00773679
[DOI] http://dx.doi.org/10.1103/PhysRevLett.98.172301
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