| 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 | |
| Sirunyan, A. M.1; Tumasyan, A.1; Adam, W.2; Asilar, E.2; Bergauer, T.2; Brandstetter, J.2; Brondolin, E.2; Dragicevic, M.2; Eroe, J.2; Flechl, M.2 | |
| 刊名 | Journal of high energy physics
 |
| 2017-07-03 | |
| 期号 | 7页码:43 |
| 关键词 | Flavour changing neutral currents Hadron-hadron scattering (experiments) Top physics |
| ISSN号 | 1029-8479 |
| DOI | 10.1007/jhep07(2017)003 |
| 通讯作者 | Sirunyan, a. m.(cms-publication-committee-chair@cern.ch) |
| 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 |
| WOS类目 | Physics, Particles & Fields |
| 语种 | 英语 |
| 出版者 | SPRINGER |
| WOS记录号 | WOS:000405103900001 |
| 内容类型 | 期刊论文 |
| URI标识 | http://www.corc.org.cn/handle/1471x/2177263 |
| 专题 | 高能物理研究所 |
| 通讯作者 | Sirunyan, A. M. |
| 作者单位 | 1.Yerevan Phys Inst, Yerevan, Armenia 2.Inst Hochenergiephys, Vienna, Austria 3.Inst Nucl Problems, Minsk, Byelarus 4.Natl Ctr Particle & High Energy Phys, Minsk, Byelarus 5.Univ Antwerp, Antwerp, Belgium 6.Vrije Univ Brussel, Brussels, Belgium 7.Univ Libre Bruxelles, Brussels, Belgium 8.Univ Ghent, Ghent, Belgium 9.Catholic Univ Louvain, Louvain La Neuve, Belgium 10.Univ Mons, Mons, Belgium |
| 推荐引用方式 GB/T 7714 | Sirunyan, A. M.,Tumasyan, A.,Adam, W.,et al. 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):43. |
| APA | Sirunyan, A. M..,Tumasyan, A..,Adam, W..,Asilar, E..,Bergauer, T..,...&Khan, W. A..(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),43. |
| MLA | Sirunyan, A. M.,et al."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):43. |
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