Measurement of the polarisation of W bosons produced with large transverse momentum in pp collisions at root s=7 TeV with the ATLAS experiment
文献类型：期刊论文
| 作者 | ATLAS Collaboration |
| 刊名 | EUROPEAN PHYSICAL JOURNAL C
 |
| 出版日期 | 2012 |
| 卷号 | 72期号:5 |
| 关键词 | HADRONIC COLLISIONS PAIR PRODUCTION MONTE-CARLO DECAY |
| 通讯作者 | Aad, G (reprint author), Univ Freiburg, Fak Math Phys, Fribourg, Switzerland. |
| 英文摘要 | This paper describes an analysis of the angular distribution of W -> e nu and W -> mu nu decays, using data from pp collisions at root s = 7 TeV recorded with the ATLAS detector at the LHC in 2010, corresponding to an integrated luminosity of about 35 pb(-1). Using the decay lepton transverse momentum and the missing transverse momentum, the W decay angular distribution projected onto the transverse plane is obtained and analysed in terms of helicity fractions f(0), f(L) and f(R) over two ranges of W transverse momentum (p(T)(W)) : 35 < p(T)(W) < 50 GeV and p(T)(W) > 50 GeV. Good agreement is found with theoretical predictions. For p(T)(W) > 50 GeV, the values of f(0) and f(L) - f(R), averaged over charge and lepton flavour, are measured to be: f(0) = 0.127 +/- 0.030 +/- 0.108 and f(L) - f(R) = 0.252 +/- 0.017 +/- 0.030, where the first uncertainties are statistical, and the second include all systematic effects. |
| 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:000304778800023 |
| 公开日期 | 2016-02-26 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/213252]  |
| 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 polarisation of W bosons produced with large transverse momentum in pp collisions at root s=7 TeV with the ATLAS experiment[J]. EUROPEAN PHYSICAL JOURNAL C,2012,72(5). |
| APA | ATLAS Collaboration.(2012).Measurement of the polarisation of W bosons produced with large transverse momentum in pp collisions at root s=7 TeV with the ATLAS experiment.EUROPEAN PHYSICAL JOURNAL C,72(5). |
| MLA | ATLAS Collaboration."Measurement of the polarisation of W bosons produced with large transverse momentum in pp collisions at root s=7 TeV with the ATLAS experiment".EUROPEAN PHYSICAL JOURNAL C 72.5(2012). |
入库方式： OAI收割
来源：高能物理研究所
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