Evidence for collectivity in pp collisions at the LHC
文献类型：期刊论文
| 作者 | CMS Collaboration |
| 刊名 | PHYSICS LETTERS B
 |
| 出版日期 | 2017 |
| 卷号 | 765页码:193-220 |
| 关键词 | CMS Physics Heavy ion Ridge Correlation pp |
| ISSN号 | 0370-2693 |
| DOI | 10.1016/j.physletb.2016.12.009 |
| 文献子类 | Article |
| 英文摘要 | Measurements of two- and multi-particle angular correlations in pp collisions at root s = 5, 7, and 13TeV are presented as a function of charged-particle multiplicity. The data, corresponding to integrated luminosities of 1.0 pb(-1) (5 TeV), 6.2 pb(-1) (7 TeV), and 0.7 pb(-1) (13 TeV), were collected using the CMS detector at the LHC. The second-order (v(2)) and third-order (v(3)) azimuthal anisotropy harmonics of unidentified charged particles, as well as v(2) of K-S(0) and Lambda/(Lambda) over bar particles, are extracted from long-range two-particle correlations as functions of particle multiplicity and transverse momentum. For high-multiplicity pp events, a mass ordering is observed for the v(2) values of charged hadrons (mostly pions), K-S(0), and Lambda/(Lambda) over bar, with lighter particle species exhibiting a stronger azimuthal anisotropy signal below pT approximate to GeV/c. For 13 TeV data, the v(2) signals are also extracted from four- and six-particle correlations for the first time in pp collisions, with comparable magnitude to those from two-particle correlations. These observations are similar to those seen in pPb and PbPb collisions, and support the interpretation of a collective origin for the observed long-range correlations in high-multiplicity pp collisions. (C) 2016 The Author. Published by Elsevier B.V. This is an open access article under the CC BY license. |
| 电子版国际标准刊号 | 1873-2445 |
| WOS关键词 | TRANSVERSE-MOMENTUM DEPENDENCE ; PROTON-PROTON ; FLOW ; PSEUDORAPIDITY ; MULTIPLICITY ; TEV |
| WOS研究方向 | Astronomy & Astrophysics ; Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:000393627800025 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/284290]  |
| 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. Evidence for collectivity in pp collisions at the LHC[J]. PHYSICS LETTERS B,2017,765:193-220. |
| APA | CMS Collaboration.(2017).Evidence for collectivity in pp collisions at the LHC.PHYSICS LETTERS B,765,193-220. |
| MLA | CMS Collaboration."Evidence for collectivity in pp collisions at the LHC".PHYSICS LETTERS B 765(2017):193-220. |
入库方式： OAI收割
来源：高能物理研究所
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