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Comprehensive measurements of t-channel single top-quark production cross sections at root S=7 TeV with the ATLAS detector
ATLAS collaboration
2014
发表期刊PHYSICAL REVIEW D
卷号90期号:11
通讯作者Aad, G (reprint author), Aix Marseille Univ, CPPM, Marseille, France.
摘要This article presents measurements of the t-channel single top-quark ((t) over bart) and top-antiquark (_ t) total production cross sections sdtq_ and sd _ tq_, their ratio Rt sdtq_= sd _ tq_, and a measurement of the inclusive production cross section sdtq _ _ tq_ in proton-proton collisions at ffiffiffi ps = 7 TeV at the LHC. Differential cross sections for the tq and _ tq processes are measured as a function of the transverse momentum and the absolute value of the rapidity of t and _ t, respectively. The analyzed data set was recorded with the ATLAS detector and corresponds to an integrated luminosity of 4.59 fb-1. Selected events contain one charged lepton, large missing transverse momentum, and two or three jets. The cross sections are measured by performing a binned maximum-likelihood fit to the output distributions of neural networks. The resulting measurements are sdtq_ 46 = 1dstat_ = 6dsyst_ pb, sd _ tq_ = 23 +/- 1dstat_ = 3dsyst_ pb, Rt = 2.04 0.13dstat_ +/-=0.12dsyst_, and sdtq _ _ tq_ = 68 +/-= 2dstat_ = 8dsyst_ pb, consistent with the Standard Model expectation. The uncertainty on the measured cross sections is dominated by systematic uncertainties, while the uncertainty on Rt is mainly statistical. Using the ratio of sdtq _ _ tq_ to its theoretical prediction, and assuming that the top-quark-related CKM matrix elements obey the relation jVtbj = jVtsj; jVtdj, we determine jVtbj = 1.02 = 0.07.
关键词PARTON DISTRIBUTIONS HADRON COLLIDERS PAIR PRODUCTION LHC COLLISIONS
学科领域Astronomy & Astrophysics; Physics
DOI10.1103/PhysRevD.90.112006
收录类别SCI
语种英语
WOS类目Astronomy & Astrophysics ; Physics, Particles & Fields
WOS记录号WOS:000346377100003
引用统计
被引频次:20[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/311005/213832
专题实验物理中心
作者单位中国科学院高能物理研究所
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ATLAS collaboration. Comprehensive measurements of t-channel single top-quark production cross sections at root S=7 TeV with the ATLAS detector[J]. PHYSICAL REVIEW D,2014,90(11).
APA ATLAS collaboration.(2014).Comprehensive measurements of t-channel single top-quark production cross sections at root S=7 TeV with the ATLAS detector.PHYSICAL REVIEW D,90(11).
MLA ATLAS collaboration."Comprehensive measurements of t-channel single top-quark production cross sections at root S=7 TeV with the ATLAS detector".PHYSICAL REVIEW D 90.11(2014).
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