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Measurements of top-quark pair differential cross-sections in the lepton plus jets channel in pp collisions at root s=8 TeV using the ATLAS detector
ATLAS Collaboration
2016
发表期刊EUROPEAN PHYSICAL JOURNAL C
卷号76期号:10
文章类型Article
摘要Measurements of normalized differential cross-sections of top-quark pair production are presented as a function of the top-quark, t (t) over bar system and event-level kinematic observables in proton-proton collisions at a centre-of-mass energy of root s = 8 TeV. The observables have been chosen to emphasize the t (t) over bar production process and to be sensitive to effects of initial-and final-state radiation, to the different parton distribution functions, and to non-resonant processes and higher-order corrections. The dataset corresponds to an integrated luminosity of 20.3 fb(-1), recorded in 2012 with the ATLAS detector at the CERN Large Hadron Collider. Events are selected in the lepton+jets channel, requiring exactly one charged lepton and at least four jets with at least two of the jets tagged as originating from a b-quark. The measured spectra are corrected for detector effects and are compared to several Monte Carlo simulations. The results are in fair agreement with the predictions over a wide kinematic range. Nevertheless, most generators predict a harder top-quark transverse momentum distribution at high values than what is observed in the data. Predictions beyond NLO accuracy improve the agreement with data at high top-quark transverse momenta. Using the current settings and parton distribution functions, the rapidity distributions are not well modelled by any generator under consideration. However, the level of agreement is improved when more recent sets of parton distribution functions are used.
DOI10.1140/epjc/s10052-016-4366-4
关键词[WOS]HADRON COLLIDERS ; ELECTROWEAK CORRECTIONS ; PARTON DISTRIBUTIONS ; RESUMMATION ; LHC
语种英语
WOS记录号WOS:000385168100001
引用统计
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/260923
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. Measurements of top-quark pair differential cross-sections in the lepton plus jets channel in pp collisions at root s=8 TeV using the ATLAS detector[J]. EUROPEAN PHYSICAL JOURNAL C,2016,76(10).
APA ATLAS Collaboration.(2016).Measurements of top-quark pair differential cross-sections in the lepton plus jets channel in pp collisions at root s=8 TeV using the ATLAS detector.EUROPEAN PHYSICAL JOURNAL C,76(10).
MLA ATLAS Collaboration."Measurements of top-quark pair differential cross-sections in the lepton plus jets channel in pp collisions at root s=8 TeV using the ATLAS detector".EUROPEAN PHYSICAL JOURNAL C 76.10(2016).
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