Search for standard model production of four top quarks with same-sign and multilepton final states in proton-proton collisions at root s=13tev
文献类型：期刊论文
| 作者 | Sirunyan, A. M.2; Tumasyan, A.2; Adam, W.3; Ambrogi, F.3; Asilar, E.3; Bergauer, T.3; Brandstetter, J.3; Brondolin, E.3; Dragicevic, M.3; Eroe, J.3 |
| 刊名 | European physical journal c
 |
| 出版日期 | 2018-02-19 |
| 卷号 | 78期号:2页码:24 |
| ISSN号 | 1434-6044 |
| DOI | 10.1140/epjc/s10052-018-5607-5 |
| 通讯作者 | Sirunyan, a. m.() |
| 英文摘要 | A search for standard model production of four top quarks (t (t) over bart (t) over bar) is reported using events containing at least three leptons (e, mu) or a same-sign lepton pair. the events are produced in proton-proton collisions at a center-of-mass energy of 13 tevat the lhc, and the data sample, recorded in 2016, corresponds to an integrated luminosity of 35.9 fb(-1). jet multiplicity and flavor are used to enhance signal sensitivity, and dedicated control regions are used to constrain the dominant backgrounds. the observed and expected signal significances are, respectively, 1.6 and 1.0 standard deviations, and the t (t) over bart (t) over bar cross section ismeasured to be 16.9(-11.4)(+13.8) fb, in agreement with next-to-leading-order standard model predictions. these results are also used to constrain the yukawa coupling between the top quark and the higgs boson to be less than 2.1 times its expected standard model value at 95% confidence level. |
| WOS关键词 | SUPERGAUGE TRANSFORMATIONS ; SUPERSYMMETRY ; EXTENSION ; INVARIANT ; NEUTRINO ; DECAY |
| 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:000425395800003 |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2178038 |
| 专题 | 高能物理研究所 |
| 通讯作者 | Sirunyan, A. M. |
| 作者单位 | 1.CERN, CH-1211 Geneva 23, Switzerland 2.Yerevan Phys Inst, Yerevan, Armenia 3.Inst Hochenergiephys, Vienna, Austria 4.Inst Nucl Problems, 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.Ctr Brasileiro Pesquisas Fis, Rio De Janeiro, Brazil |
| 推荐引用方式 GB/T 7714 | Sirunyan, A. M.,Tumasyan, A.,Adam, W.,et al. Search for standard model production of four top quarks with same-sign and multilepton final states in proton-proton collisions at root s=13tev[J]. European physical journal c,2018,78(2):24. |
| APA | Sirunyan, A. M..,Tumasyan, A..,Adam, W..,Ambrogi, F..,Asilar, E..,...&Zolkapli, Z..(2018).Search for standard model production of four top quarks with same-sign and multilepton final states in proton-proton collisions at root s=13tev.European physical journal c,78(2),24. |
| MLA | Sirunyan, A. M.,et al."Search for standard model production of four top quarks with same-sign and multilepton final states in proton-proton collisions at root s=13tev".European physical journal c 78.2(2018):24. |
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