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Measurement of t(t)over-bar production with a veto on additional central jet activity in pp collisions at root s=7 TeV using the ATLAS detector
ATLAS collaboration
2012
发表期刊EUROPEAN PHYSICAL JOURNAL C
卷号72期号:6
通讯作者Aad, G (reprint author), Univ Freiburg, Fak Math & Phys, Hugstetter Str 55, D-79106 Freiburg, Germany.
摘要A measurement of the jet activity in t (t) over bar events produced in proton-proton collisions at a centre-of-mass energy of 7 TeV is presented, using 2.05 fb(-1) of integrated luminosity collected by the ATLAS detector at the Large Hadron Collider. The t (t) over bar events are selected in the dilepton decay channel with two identified b-jets from the top quark decays. Events are vetoed if they contain an additional jet with transverse momentum above a threshold in a central rapidity interval. The fraction of events surviving the jet veto is presented as a function of this threshold for four different central rapidity interval definitions. An alternate measurement is also performed, in which events are vetoed if the scalar transverse momentum sum of the additional jets in each rapidity interval is above a threshold. In both measurements, the data are corrected for detector effects and compared to the theoretical models implemented in MC@NLO, POWHEG, ALPGEN and SHERPA. The experimental uncertainties are often smaller than the spread of theoretical predictions, allowing deviations between data and theory to be observed in some regions of phase space.
关键词QUARK PAIR PRODUCTION PRODUCTION CROSS-SECTION
学科领域Physics
DOI10.1140/epjc/s10052-012-2043-9
收录类别SCI
语种英语
WOS类目Physics, Particles & Fields
WOS记录号WOS:000306059600022
引用统计
被引频次:10[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/311005/213276
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. Measurement of t(t)over-bar production with a veto on additional central jet activity in pp collisions at root s=7 TeV using the ATLAS detector[J]. EUROPEAN PHYSICAL JOURNAL C,2012,72(6).
APA ATLAS collaboration.(2012).Measurement of t(t)over-bar production with a veto on additional central jet activity in pp collisions at root s=7 TeV using the ATLAS detector.EUROPEAN PHYSICAL JOURNAL C,72(6).
MLA ATLAS collaboration."Measurement of t(t)over-bar production with a veto on additional central jet activity in pp collisions at root s=7 TeV using the ATLAS detector".EUROPEAN PHYSICAL JOURNAL C 72.6(2012).
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