Forward energy flow, central charged-particle multiplicities, and pseudorapidity gaps in W and Z boson events from pp collisions at root s=7 TeV
文献类型：期刊论文
| 作者 | CMS Collaboration |
| 刊名 | EUROPEAN PHYSICAL JOURNAL C
 |
| 出版日期 | 2012 |
| 卷号 | 72期号:1 |
| 关键词 | DIFFRACTIVE W RAPIDITY GAPS QCD ANALYSIS SCATTERING POMERON |
| 通讯作者 | Chatrchyan, S (reprint author), Yerevan Phys Inst, Yerevan 375036, Armenia. |
| 英文摘要 | A study of forward energy flow and central charged-particle multiplicity in events with W and Z bosons decaying into leptons is presented. The analysis uses a sample of 7 TeV pp collisions, corresponding to an integrated luminosity of 36 pb(-1), recorded by the CMS experiment at the LHC. The observed forward energy depositions, their correlations, and the central charged-particle multiplicities are not well described by the available non-diffractive soft-hadron production models. A study of about 300 events with no significant energy deposited in one of the forward calorimeters, corresponding to a pseudorapidity gap of at least 1.9 units, is also presented. An indication for a diffractive component in these events comes from the observation that the majority of the charged leptons from the W(Z) decays are found in the hemisphere opposite to the gap. When fitting the signed lepton pseudorapidity distribution of these events with predicted distributions from an admixture of diffractive (POMPYT) and non-diffractive (PYTHIA) Monte Carlo simulations, the diffractive component is determined to be (50.0 +/- 9.3 (stat.) +/- 5.2 (syst.))%. |
| 学科主题 | Physics |
| 类目[WOS] | Physics, Particles & Fields |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000300631800021 |
| 公开日期 | 2016-02-25 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/213187]  |
| 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. Forward energy flow, central charged-particle multiplicities, and pseudorapidity gaps in W and Z boson events from pp collisions at root s=7 TeV[J]. EUROPEAN PHYSICAL JOURNAL C,2012,72(1). |
| APA | CMS Collaboration.(2012).Forward energy flow, central charged-particle multiplicities, and pseudorapidity gaps in W and Z boson events from pp collisions at root s=7 TeV.EUROPEAN PHYSICAL JOURNAL C,72(1). |
| MLA | CMS Collaboration."Forward energy flow, central charged-particle multiplicities, and pseudorapidity gaps in W and Z boson events from pp collisions at root s=7 TeV".EUROPEAN PHYSICAL JOURNAL C 72.1(2012). |
入库方式： OAI收割
来源：高能物理研究所
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