Measurement of the t-channel single-top-quark production cross section and of the |Vtb| CKM matrix element in pp collisions at √S = 8 TeV

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题名:	Measurement of the t-channel single-top-quark production cross section and of the \|Vtb\| CKM matrix element in pp collisions at √S = 8 TeV
作者:	林宗泰;Khachatryan, Vardan
贡献者:	理學院物理學系
关键词:	hadron-hadron scattering;top physics
日期:	2014-01-01
上传时间:	2026-04-23 12:18:40 (UTC+8)
出版者:	United States: Springer Berlin
摘要:	摘要： Our measurements are presented of the t-channel single-top-quark production cross section in proton-proton collisions at √s = 8 TeV. The results are based on a data sample corresponding to an integrated luminosity of 19.7 fb-1 recorded with the CMS detector at the LHC. The cross section is measured inclusively, as well as separately for top (t) and antitop (t¯), in final states with a muon or an electron. The measured inclusive t-channel cross section is σ t-ch. = 83.6 ± 2.3 (stat.) ± 7.4 (syst.) pb. The single t and t¯ cross sections are measured to be σ t-ch.(t) = 53.8 ± 1.5 (stat.) ± 4.4 (syst.) pb and σ t-ch. (t¯) = 27.6 ± 1.3 (stat.) ± 3.7 (syst.) pb, respectively. The measured ratio of cross sections is R t-ch. = σ t-ch.(t)/σ t-ch. (t¯) = 1.95 ± 0.10 (stat.) ± 0.19 (syst.), in agreement with the standard model prediction. Finally, the modulus of the Cabibbo-Kobayashi-Maskawa matrix element V tb is extracted and, in combination with a previous CMS result at √s = 7 TeV, a value \|V tb\| = 0.998 ± 0.038 (exp.) ± 0.016 (theo.) is obtained. 出版者： United States: Springer Berlin 出版日期： 2014-06-16 出處： The journal of high energy physics, 2014-06, Vol.2014 (6) 資源來源： Publicly Available Content Database (Proquest) 識別號： ISSN: 1029-8479 識別號： DOI: 10.1007/JHEP06(2014)090
显示于类别:	[物理學系] 期刊論文

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