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Measurement of the t-channel single top-quark production cross section in pp collisions at root s=7 TeV with the ATLAS detector
ATLAS Collaboration
2012
发表期刊PHYSICS LETTERS B
卷号717期号:4-5页码:330-350
摘要We report a measurement of the cross section of single top-quark production in the t-channel using 1.04 fb(-1) of pp collision data at root s = 7 TeV recorded with the ATLAS detector at the LHC. Selected events feature one electron or muon, missing transverse momentum, and two or three jets, exactly one of them identified as originating from a b quark. The cross section is measured by fitting the distribution of a multivariate discriminant constructed with a neural network, yielding sigma(t) = 83 +/- 4 (stat.)(-19)(+20) (syst.) pb, which is in good agreement with the prediction of the Standard Model. Using the ratio of the measured to the theoretically predicted cross section and assuming that the top-quark-related CKM matrix elements obey the relation vertical bar V-tb vertical bar >> vertical bar V-ts vertical bar, vertical bar V-td vertical bar, the coupling strength at the W-t-b vertex is determined to be vertical bar V-tb vertical bar = 1.13(-0.13)(+0.14). If it is assumed that vertical bar V-tb vertical bar <= 1 a lower limit of vertical bar V-tb vertical bar > 0.75 is obtained at the 95% confidence level. (C) 2012 CERN. Published by Elsevier B.V. All rights reserved.
学科领域Physics
DOI10.1016/j.physletb.2012.09.031
收录类别SCI
WOS记录号WOS:000310863300008
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被引频次:91[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/223942
专题实验物理中心
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ATLAS Collaboration. Measurement of the t-channel single top-quark production cross section in pp collisions at root s=7 TeV with the ATLAS detector[J]. PHYSICS LETTERS B,2012,717(4-5):330-350.
APA ATLAS Collaboration.(2012).Measurement of the t-channel single top-quark production cross section in pp collisions at root s=7 TeV with the ATLAS detector.PHYSICS LETTERS B,717(4-5),330-350.
MLA ATLAS Collaboration."Measurement of the t-channel single top-quark production cross section in pp collisions at root s=7 TeV with the ATLAS detector".PHYSICS LETTERS B 717.4-5(2012):330-350.
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