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Search for s channel single top quark production in pp collisions at root s=7 and 8 TeV
CMS Collaboration
2016
发表期刊JOURNAL OF HIGH ENERGY PHYSICS
期号9
文章类型Article
摘要A search is presented for single top quark production in the s channel in proton-proton collisions with the CMS detector at the CERN LHC in decay modes of the top quark containing a muon or an electron in the final state. The signal is extracted through a maximum-likelihood fit to the distribution of a multivariate discriminant defined using boosted decision trees to separate the expected signal contribution from background processes. The analysis uses data collected at centre-of-mass energies of 7 and 8 TeV and corresponding to integrated luminosities of 5.1 and 19.7 fb(-1), respectively. The measured cross sections of 7.1 +/- 8.1 pb (at 7 TeV) and 13.4 +/- 7.3 pb (at 8 TeV) result in a best fit value of 2.0 +/- 0.9 for the combined ratio of the measured and expected values. The signal significance is 2.5 standard deviations, and the upper limit on the rate relative to the standard model expectation is 4.7 at 95% confidence level.
关键词Hadron-Hadron scattering (experiments) Top physics
DOI10.1007/JHEP09(2016)027
语种英语
WOS记录号WOS:000383024500001
引用统计
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/260743
专题粒子天体物理中心
作者单位中国科学院高能物理研究所
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CMS Collaboration. Search for s channel single top quark production in pp collisions at root s=7 and 8 TeV[J]. JOURNAL OF HIGH ENERGY PHYSICS,2016(9).
APA CMS Collaboration.(2016).Search for s channel single top quark production in pp collisions at root s=7 and 8 TeV.JOURNAL OF HIGH ENERGY PHYSICS(9).
MLA CMS Collaboration."Search for s channel single top quark production in pp collisions at root s=7 and 8 TeV".JOURNAL OF HIGH ENERGY PHYSICS .9(2016).
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