Measurement of tau polarisation in Z/gamma* -> tau tau decays in proton-proton collisions at root s=8 TeV with the ATLAS detector
文献类型：期刊论文
| 作者 | ATLAS Collaboration |
| 刊名 | EUROPEAN PHYSICAL JOURNAL C
 |
| 出版日期 | 2018 |
| 卷号 | 78期号:2页码:163 |
| ISSN号 | 1434-6044 |
| DOI | 10.1140/epjc/s10052-018-5619-1 |
| 文献子类 | Article |
| 英文摘要 | This paper presents a measurement of the polarisation of tau leptons produced in Z/gamma* -> tau tau decays which is performed with a dataset of proton-proton collisions at root s = 8 TeV, corresponding to an integrated luminosity of 20.2 fb(-1) recorded with the ATLAS detector at the LHC in 2012. The Z/gamma* -> tau tau decays are reconstructed from a hadronically decaying tau lepton with a single charged particle in the final state, accompanied by a tau lepton that decays leptonically. The tau polarisation is inferred from the relative fraction of energy carried by charged and neutral hadrons in the hadronic tau decays. The polarisation is measured in a fiducial region that corresponds to the kinematic region accessible to this analysis. The tau polarisation extracted over the full phase space within the Z/gamma* mass range of 66 < mZ/gamma* < 116GeVis found to be P-tau = -0.14 +/- 0.02(stat)+/- 0.04(syst). It is in agreement with the Standard Model prediction of Pt = -0.1517 +/- 0.0019, which is obtained from the ALP-GEN event generator interfaced with the PYTHIA 6 parton shower modelling and the TAUOLA tau decay library. |
| 电子版国际标准刊号 | 1434-6052 |
| WOS关键词 | MONTE-CARLO ; SIMULATION ; LHC |
| WOS研究方向 | Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:000426484600001 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/285698]  |
| 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 tau polarisation in Z/gamma* -> tau tau decays in proton-proton collisions at root s=8 TeV with the ATLAS detector[J]. EUROPEAN PHYSICAL JOURNAL C,2018,78(2):163. |
| APA | ATLAS Collaboration.(2018).Measurement of tau polarisation in Z/gamma* -> tau tau decays in proton-proton collisions at root s=8 TeV with the ATLAS detector.EUROPEAN PHYSICAL JOURNAL C,78(2),163. |
| MLA | ATLAS Collaboration."Measurement of tau polarisation in Z/gamma* -> tau tau decays in proton-proton collisions at root s=8 TeV with the ATLAS detector".EUROPEAN PHYSICAL JOURNAL C 78.2(2018):163. |
入库方式： OAI收割
来源：高能物理研究所
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