Measurement of the top quark-pair production cross section with ATLAS in pp collisions at root s=7 TeV
ATLAS collaboration
刊名EUROPEAN PHYSICAL JOURNAL C
2011
卷号71期号:3
关键词HADRONIC COLLISIONS
学科分类Physics
DOI10.1140/epjc/s10052-011-1577-6
通讯作者Aad, G (reprint author), Univ Freiburg, Fak Math & Phys, Hermann Herder Str 3, D-79104 Freiburg, Germany.
英文摘要A measurement of the production cross-section for top quark pairs (t (t) over bar) in pp collisions at root s = 7 TeV is presented using data recorded with the ATLAS detector at the Large Hadron Collider. Events are selected in two different topologies: single lepton (electron e or muon mu) with large missing transverse energy and at least four jets, and dilepton (ee, mu mu or e mu) with large missing transverse energy and at least two jets. In a data sample of 2.9 pb(-1), 37 candidate events are observed in the single-lepton topology and 9 events in the dilepton topology. The corresponding expected backgrounds from non-t (t) over bar Standard Model processes are estimated using data-driven methods and determined to be 12.2 +/- 3.9 events and 2.5 +/- 0.6 events, respectively. The kinematic properties of the selected events are consistent with SM t (t) over bar production. The inclusive top quark pair production cross-section is measured to be sigma(t (t) over bar) = 145 +/- 31 (stat.)(-27)(+42) (syst.) pb. The measurement agrees with perturbative QCD calculations.
类目[WOS]Physics, Particles & Fields
收录类别SCI
语种英语
WOS记录号WOS:000291698400004
引用统计
被引频次:40[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/311005/213065
专题中国科学院高能物理研究所_实验物理中心_期刊论文
作者单位中国科学院高能物理研究所
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ATLAS collaboration. Measurement of the top quark-pair production cross section with ATLAS in pp collisions at root s=7 TeV[J]. EUROPEAN PHYSICAL JOURNAL C,2011,71(3).
APA ATLAS collaboration.(2011).Measurement of the top quark-pair production cross section with ATLAS in pp collisions at root s=7 TeV.EUROPEAN PHYSICAL JOURNAL C,71(3).
MLA ATLAS collaboration."Measurement of the top quark-pair production cross section with ATLAS in pp collisions at root s=7 TeV".EUROPEAN PHYSICAL JOURNAL C 71.3(2011).
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