Measurement of the Upsilon production cross section in 920 GeV fixed-target proton-nucleus collisions
文献类型：期刊论文
| 作者 | HERA-B Collaboration |
| 刊名 | PHYSICS LETTERS B
 |
| 出版日期 | 2006 |
| 卷号 | 638期号:1页码:13-21 |
| 关键词 | DIMUON PRODUCTION J/PSI PSI SUPPRESSION PHYSICS GAMMA PAIRS |
| 通讯作者 | Zoccoli, A (reprint author), Univ Bologna, Dipartimento Fis, I-40126 Bologna, Italy. |
| 英文摘要 | The cross section ratio R-J/psi = Br(Y -> l(+)l(-)) center dot d sigma(Y)/dyl(y=0)/sigma(J/psi) has been measured with the HERA-B spectrometer in fixed-target proton-nucleus collisions at 920 GeV proton beam energy corresponding to a proton-nucleon c.m.s. energy of root s = 41.6 GeV. The combined results for the decay channels Y -> e(+)e(-) and Y -> mu(+)mu(-) yield a ratio R-J/psi = (9.0 +/- 2.1) x 10(-6). The corresponding Y production cross section per nucleon at mid-rapidity (y = 0) has been determined to be Br(Y -> l(+)l(-)) center dot d sigma(Y)/dy vertical bar(y=0) = 4.5 +/- 1.1 pb/nucleon. |
| 学科主题 | Physics |
| 类目[WOS] | Physics, Multidisciplinary |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000238489700003 |
| 公开日期 | 2016-02-26 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/212673]  |
| 专题 | 高能物理研究所_实验物理中心 |
| 作者单位 | 中国科学院高能物理研究所 |
| 推荐引用方式 GB/T 7714 | HERA-B Collaboration. Measurement of the Upsilon production cross section in 920 GeV fixed-target proton-nucleus collisions[J]. PHYSICS LETTERS B,2006,638(1):13-21. |
| APA | HERA-B Collaboration.(2006).Measurement of the Upsilon production cross section in 920 GeV fixed-target proton-nucleus collisions.PHYSICS LETTERS B,638(1),13-21. |
| MLA | HERA-B Collaboration."Measurement of the Upsilon production cross section in 920 GeV fixed-target proton-nucleus collisions".PHYSICS LETTERS B 638.1(2006):13-21. |
入库方式： OAI收割
来源：高能物理研究所
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