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Search for resonant t(t)over-bar production in lepton plus jets events in pp collisions at root s=7 TeV
CMS Collaboration
2012
发表期刊JOURNAL OF HIGH ENERGY PHYSICS
期号12
通讯作者Chatrchyan, S (reprint author), Yerevan Phys Inst, Yerevan 375036, Armenia.
摘要A model-independent search for the production of heavy resonances decaying into top-antitop quark pairs is presented. The search is based on events containing one lepton (muon or electron) and at least two jets selected from data samples corresponding to an integrated luminosity of 4.4-5.0 fb(-1) collected in pp collisions at root s = 7 TeV. Results are presented from the combination of two dedicated searches optimized for boosted production and production at threshold. No excess of events is observed over the expected yield from the standard model processes. Topcolor Z' bosons with narrow (wide) width are excluded at 95% confidence level for masses below 1.49 (2.04) TeV and an upper limit of 0.3 (1.3) pb or lower is set on the production cross section times branching fraction for resonance masses above 1 TeV. Kaluza-Klein excitations of a gluon with masses below 1.82 TeV (at 95% confidence level) in the Randall-Sundrum model are also excluded, and an upper limit of 0.7 pb or lower is set on the production cross section times branching fraction for resonance masses above 1 TeV.
关键词TOP-QUARK PRODUCTION HADRON COLLIDERS STANDARD MODEL TOPCOLOR HIERARCHY DECAY
学科领域Physics
DOI10.1007/JHEP12(2012)015
收录类别SCI
语种英语
WOS类目Physics, Particles & Fields
WOS记录号WOS:000313123800015
引用统计
被引频次:3[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/311005/213421
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. Search for resonant t(t)over-bar production in lepton plus jets events in pp collisions at root s=7 TeV[J]. JOURNAL OF HIGH ENERGY PHYSICS,2012(12).
APA CMS Collaboration.(2012).Search for resonant t(t)over-bar production in lepton plus jets events in pp collisions at root s=7 TeV.JOURNAL OF HIGH ENERGY PHYSICS(12).
MLA CMS Collaboration."Search for resonant t(t)over-bar production in lepton plus jets events in pp collisions at root s=7 TeV".JOURNAL OF HIGH ENERGY PHYSICS .12(2012).
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