Centrality Dependence of Charm Production from a Measurement of Single Electrons in Au + Au Collisions at √sNN = 200 GeV
Physical Review Letters 94 巻 8 号
082301-1-082301-6 頁
2005-03-02 発行
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| ファイル情報(添付) | |
| タイトル ( eng ) |
Centrality Dependence of Charm Production from a Measurement of Single Electrons 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 Letters
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| 巻 | 94 |
| 号 | 8 |
| 開始ページ | 082301-1 |
| 終了ページ | 082301-6 |
| 抄録 |
The PHENIX experiment has measured midrapidity transverse momentum spectra (0.4 < pT < 4.0 GeV/c) of single electrons as a function of centrality in Au + Au collisions at √SNN = 200 GeV. Contributions from photon conversions and Dalitz decays of light neutral mesons are measured by introducing a thin (1.7% X0) converter into the PHENIX acceptance and are statistically removed. The subtracted nonphotonic electron spectra are primarily due to the semileptonic decays of hadrons containing heavy quarks, mainly charm at lower pT. For all centralities, the charm production cross section is found to scale with the nuclear overlap function, TAA. For minimum-bias collisions the charm cross section per binary collision is Ncc̅/TAA = 622 ± 57(stat) ± 160(syst) μb.
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| 著者キーワード |
heavy ion-nucleus reactions
charm particles
meson decay
semileptonic decays
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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 | 2005-03-02 |
| 権利情報 |
Copyright (c) 2005 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.94.082301
[NCID] AA00773679
[DOI] http://dx.doi.org/10.1103/PhysRevLett.94.082301
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