Search for narrow resonances in dilepton mass spectra in pp collisions at root s=7 TeV CMS Collaboration
文献类型：期刊论文
| 作者 | CMS Collaboration |
| 刊名 | PHYSICS LETTERS B
 |
| 出版日期 | 2012 |
| 卷号 | 714期号:2--5页码:158-179 |
| 关键词 | FERMION-PAIR PRODUCTION YAN K-FACTOR STANDARD MODEL E(+)E(-) COLLISIONS LEP CONSTRAINTS COLLIDERS PHYSICS HADRON |
| 通讯作者 | Sphicas, R (reprint author), CERN, European Org Nucl Res, CH-1211 Geneva, Switzerland. |
| 英文摘要 | A search for narrow, high-mass resonances decaying to electron or muon pairs has been performed using pp collision data collected at root s = 7 TeV by the CMS experiment in 2011. The data sample corresponds to an integrated luminosity of approximately 5 fb(-1). The event yields observed in the signal regions are consistent with predictions of the standard model backgrounds, and upper limits on the cross section times branching fraction for a resonance decaying to dileptons are extracted from a shape analysis of the dilepton invariant mass distribution. The resulting mass limits at 95% confidence level are 2330 GeV for the Z' in the Sequential Standard Model, 2000 GeV for the superstring-inspired Z'(psi) resonance, 890 (540) GeV for the Stueckelberg extension Z'(St) the mass parameter epsilon = 0.06 (0.04), and 2140 (1810) GeV for Kaluza-Klein gravitons with the coupling parameter k/(M) over bar (Pl) of 0.10 (0.05). These limits are the most stringent to date. (C) 2012 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:000307680100004 |
| 公开日期 | 2016-02-25 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/213315]  |
| 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. Search for narrow resonances in dilepton mass spectra in pp collisions at root s=7 TeV CMS Collaboration[J]. PHYSICS LETTERS B,2012,714(2--5):158-179. |
| APA | CMS Collaboration.(2012).Search for narrow resonances in dilepton mass spectra in pp collisions at root s=7 TeV CMS Collaboration.PHYSICS LETTERS B,714(2--5),158-179. |
| MLA | CMS Collaboration."Search for narrow resonances in dilepton mass spectra in pp collisions at root s=7 TeV CMS Collaboration".PHYSICS LETTERS B 714.2--5(2012):158-179. |
入库方式： OAI收割
来源：高能物理研究所
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