Upsilon (nS) polarizations versus particle multiplicity in pp collisions at root s=7 TeV
文献类型：期刊论文
| 作者 | CMS Collaboration |
| 刊名 | PHYSICS LETTERS B
 |
| 出版日期 | 2016 |
| 卷号 | 761页码:31-52 |
| 关键词 | CMS Physics Quarkonium production Quarkonium polarization QCD medium effects |
| DOI | 10.1016/j.physletb.2016.07.065 |
| 英文摘要 | The polarizations of the Upsilon(1S), Upsilon(2S), and Upsilon(3S) mesons are measured as a function of the charged particle multiplicity in proton-proton collisions at root s = 7 TeV. The measurements are performed with a dimuon data sample collected in 2011 by the CMS experiment, corresponding to an integrated luminosity of 4.9fb(-1). The results are extracted from the dimuon decay angular distributions, in two ranges of Upsilon(nS) transverse momentum (10-15 and 15-35 GeV), and in the rapidity interval |y| < 1.2. The results do not show significant changes from low-to high-multiplicity pp collisions, although large uncertainties preclude definite statements in the Upsilon(2S) and Upsilon(3S) cases. (C) 2016 The Author(s). Published by Elsevier B.V. |
| 语种 | 英语 |
| WOS记录号 | WOS:000384469900006 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/260745]  |
| 专题 | 高能物理研究所_粒子天体物理中心 |
| 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 | CMS Collaboration. Upsilon (nS) polarizations versus particle multiplicity in pp collisions at root s=7 TeV[J]. PHYSICS LETTERS B,2016,761:31-52. |
| APA | CMS Collaboration.(2016).Upsilon (nS) polarizations versus particle multiplicity in pp collisions at root s=7 TeV.PHYSICS LETTERS B,761,31-52. |
| MLA | CMS Collaboration."Upsilon (nS) polarizations versus particle multiplicity in pp collisions at root s=7 TeV".PHYSICS LETTERS B 761(2016):31-52. |
入库方式： OAI收割
来源：高能物理研究所
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