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Measurement of the charge asymmetry in top-quark pair production in proton-proton collisions at root s=7 TeV
CMS Collaboration
2012
发表期刊PHYSICS LETTERS B
卷号709期号:1--2页码:28-49
通讯作者Sphicas, P (reprint author), CERN, European Org Nucl Res, CH-1211 Geneva, Switzerland.
摘要The difference in angular distributions between top quarks and antiquarks, commonly referred to as the charge asymmetry, is measured in pp collisions at the LHC with the CMS experiment. The. data sample corresponds to an integrated luminosity of 1.09 fb(-1) at a centre-of-mass energy of 7 TeV. Top-quark pairs are selected in the final state with an electron or muon and four or more jets. At least one jet is identified as originating from b-quark hadronization. The charge asymmetry is measured in two variables, one based on the pseudorapidities (eta) of the top quarks and the other on their rapidities (y). The results A(C)(eta) = -0.017 +/- 0.032 (stat.)(-0.036)(+0.025) (syst.) and A(C)(y) = -0.013 +/- 0.028 (stat.)(-0.031)(+0.029) (syst.) are consistent within uncertainties with the standard-model predictions. (C) 2012 CERN. Published by Elsevier B.V. All rights reserved.
关键词TEVATRON DECAY
学科领域Physics
DOI10.1016/j.physletb.2012.01.078
收录类别SCI
语种英语
WOS类目Physics, Multidisciplinary
WOS记录号WOS:000302111200006
引用统计
被引频次:68[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/311005/213200
专题粒子天体物理中心
作者单位中国科学院高能物理研究所
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CMS Collaboration. Measurement of the charge asymmetry in top-quark pair production in proton-proton collisions at root s=7 TeV[J]. PHYSICS LETTERS B,2012,709(1--2):28-49.
APA CMS Collaboration.(2012).Measurement of the charge asymmetry in top-quark pair production in proton-proton collisions at root s=7 TeV.PHYSICS LETTERS B,709(1--2),28-49.
MLA CMS Collaboration."Measurement of the charge asymmetry in top-quark pair production in proton-proton collisions at root s=7 TeV".PHYSICS LETTERS B 709.1--2(2012):28-49.
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