Measurement of the upsilon(1S) production cross-section in pp collisions at root s = 7 TeV
文献类型：期刊论文
| 作者 | ATLAS Collaboration |
| 刊名 | PHYSICS LETTERS B
 |
| 出版日期 | 2011 |
| 卷号 | 705期号:1--2页码:9-27 |
| 关键词 | PARTON DISTRIBUTIONS QCD ANALYSIS ANNIHILATION RESONANCE LHC |
| 通讯作者 | Arik, E (reprint author), Bogazici Univ, Dept Phys, Istanbul, Turkey. |
| 英文摘要 | A measurement of the cross-section for Upsilon(1S) -> mu(+)mu(-) production in proton-proton collisions at centre of mass energy of 7 TeV is presented. The cross-section is measured as a function of the gamma(1S) transverse momentum in two bins of rapidity, vertical bar y(gamma(1S))vertical bar < 1.2 and 1.2 < vertical bar y(gamma(1S))vertical bar < 2.4. The measurement requires that both muons have transverse momentum p(T)(mu) > 4 GeV and pseuclorapidity vertical bar eta(mu)vertical bar < 2.5 in order to reduce theoretical uncertainties on the acceptance, which depend on the poorly known polarisation. The results are based on an integrated luminosity of 1.13 pb(-1), collected with the ATLAS detector at the Large Hadron Collider. The cross-section measurement is compared to theoretical predictions: it agrees to within a factor of two with a prediction based on the NRQCD model including colour-singlet and colour-octet matrix elements as implemented in PYTHIA while it disagrees by up to a factor of ten with the next-to-leading order prediction based on the colour-singlet model. (C) 2011 CERN. Published by Elsevier B.V. All rights reserved. |
| 学科主题 | Physics |
| 类目[WOS] | Physics, Multidisciplinary |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000296937000003 |
| 公开日期 | 2016-02-26 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/213133]  |
| 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 | ATLAS Collaboration. Measurement of the upsilon(1S) production cross-section in pp collisions at root s = 7 TeV[J]. PHYSICS LETTERS B,2011,705(1--2):9-27. |
| APA | ATLAS Collaboration.(2011).Measurement of the upsilon(1S) production cross-section in pp collisions at root s = 7 TeV.PHYSICS LETTERS B,705(1--2),9-27. |
| MLA | ATLAS Collaboration."Measurement of the upsilon(1S) production cross-section in pp collisions at root s = 7 TeV".PHYSICS LETTERS B 705.1--2(2011):9-27. |
入库方式： OAI收割
来源：高能物理研究所
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