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Search for direct pair production of the top squark in all-hadronic final states in proton-proton collisions at=8 TeV with the ATLAS detector
ATLAS collaboration
2014
发表期刊JOURNAL OF HIGH ENERGY PHYSICS
期号9
通讯作者Aad, G (reprint author), Aix Marseille Univ, CPPM, Marseille, France.
摘要The results of a search for direct pair production of the scalar partner to the top quark using an integrated luminosity of 20.1 fb(-1) of proton-proton collision data at = 8 TeV recorded with the ATLAS detector at the LHC are reported. The top squark is assumed to decay via or , where denotes the lightest neutralino (chargino) in supersymmetric models. The search targets a fully-hadronic final state in events with four or more jets and large missing transverse momentum. No significant excess over the Standard Model background prediction is observed, and exclusion limits are reported in terms of the top squark and neutralino masses and as a function of the branching fraction of . For a branching fraction of 100%, top squark masses in the range 270-645 GeV are excluded for masses below 30 GeV. For a branching fraction of 50% to either or , and assuming the mass to be twice the mass, top squark masses in the range 250-550 GeV are excluded for masses below 60 GeV.
关键词DYNAMICAL SYMMETRY-BREAKING SUPERGAUGE TRANSFORMATIONS E(+)E(-) COLLISIONS PP COLLISIONS ROOT-S=7 TEV SUPERSYMMETRY MODEL PARTICLE MASS LHC
学科领域Physics
DOI10.1007/JHEP09(2014)015
收录类别SCI
语种英语
WOS类目Physics, Particles & Fields
WOS记录号WOS:000341821700001
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被引频次:20[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/311005/213777
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. Search for direct pair production of the top squark in all-hadronic final states in proton-proton collisions at=8 TeV with the ATLAS detector[J]. JOURNAL OF HIGH ENERGY PHYSICS,2014(9).
APA ATLAS collaboration.(2014).Search for direct pair production of the top squark in all-hadronic final states in proton-proton collisions at=8 TeV with the ATLAS detector.JOURNAL OF HIGH ENERGY PHYSICS(9).
MLA ATLAS collaboration."Search for direct pair production of the top squark in all-hadronic final states in proton-proton collisions at=8 TeV with the ATLAS detector".JOURNAL OF HIGH ENERGY PHYSICS .9(2014).
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