Search for associated production of a Z boson with a single top quark and for tZ flavour-changing interactions in pp collisions at root s=8 TeV
文献类型：期刊论文
| 作者 | CMS Collaboration |
| 刊名 | JOURNAL OF HIGH ENERGY PHYSICS
 |
| 出版日期 | 2017 |
| 期号 | 7页码:3 |
| 关键词 | Flavour Changing Neutral Currents Hadron-Hadron scattering (experiments) Top physics |
| ISSN号 | 1029-8479 |
| DOI | 10.1007/JHEP07(2017)003 |
| 文献子类 | Article |
| 英文摘要 | A search for the production of a single top quark in association with a Z boson is presented, both to identify the expected standard model process and to search for flavour changing neutral current interactions. The data sample corresponds to an integrated luminosity of 19.7 fb(-1) recorded by the CMS experiment at the LHC in proton-proton collisions at root s = 8 TeV. Final states with three leptons (electrons or muons) and at least one jet are investigated. An events yield compatible with tZq standard model production is observed, and the corresponding cross section is measured to be sigma(pp -> tZq -> lvbl(+)l(-) q) = 10(-7)(+8) fb with a significance of 2.4 standard deviations. No presence of flavour-changing neutral current production of tZq is observed. Exclusion limits at 95% confidence level on the branching fractions of a top quark decaying to a Z boson and an up or a charm quark are found to be B(t -> Zu) < 0.022% and B(t -> Zc) < 0.049%. |
| WOS关键词 | COUPLINGS |
| WOS研究方向 | Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:000405103900001 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/284466]  |
| 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 associated production of a Z boson with a single top quark and for tZ flavour-changing interactions in pp collisions at root s=8 TeV[J]. JOURNAL OF HIGH ENERGY PHYSICS,2017(7):3. |
| APA | CMS Collaboration.(2017).Search for associated production of a Z boson with a single top quark and for tZ flavour-changing interactions in pp collisions at root s=8 TeV.JOURNAL OF HIGH ENERGY PHYSICS(7),3. |
| MLA | CMS Collaboration."Search for associated production of a Z boson with a single top quark and for tZ flavour-changing interactions in pp collisions at root s=8 TeV".JOURNAL OF HIGH ENERGY PHYSICS .7(2017):3. |
入库方式： OAI收割
来源：高能物理研究所
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