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Search for scalar top quark pair production in natural gauge mediated supersymmetry models with the ATLAS detector in pp collisions at root s=7 TeV
ATLAS collaboration
2012
发表期刊PHYSICS LETTERS B
卷号715期号:1--3页码:44-60
通讯作者Aad, G (reprint author), Univ Freiburg, Fak Math & Phys, Hugstetter Str 55, D-79106 Freiburg, Germany.
摘要The results of a search for pair production of the lighter scalar partners of top quarks ((t) over bar (1)) in 2.05 fb(-1) of pp collisions at root s = 7 TeV using the ATLAS experiment at the LHC are reported. Scalar top quarks are searched for in events with two same flavour opposite-sign leptons (e, mu) with invariant mass consistent with the Z boson mass, large missing transverse momentum and jets in the final state. At least one of the jets is identified as originating from a b-quark. No excess over Standard Model expectations is found. The results are interpreted in the framework of R-parity conserving, gauge mediated Supersymmetry breaking 'natural' scenarios, where the neutralino ((chi) over bar (0)(1)) is the next-to-lightest supersymmetric particle. Scalar top quark masses up to 310 GeV are excluded for 115 GeV m(<(chi) over bar1)(0) 230 GeV at 95% confidence level, reaching an exclusion of m(<(t) over bar1) 330 GeV for m(<(chi) over bar1)(0) = 190 GeV. Scalar top quark masses below 240 GeV are excluded for all values of m((chi) over bar1)(0) > m(z). (c) 2012 CERN. Published by Elsevier B.V. All rights reserved.
关键词SUPERGAUGE TRANSFORMATIONS CROSS-SECTION BREAKING EXTENSION PARTICLE CURRENTS LEPTONS PHYSICS STATES PIONS
学科领域Physics
DOI10.1016/j.physletb.2012.07.010
收录类别SCI
语种英语
WOS类目Physics, Multidisciplinary
WOS记录号WOS:000308519000009
引用统计
被引频次:25[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/311005/213324
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 scalar top quark pair production in natural gauge mediated supersymmetry models with the ATLAS detector in pp collisions at root s=7 TeV[J]. PHYSICS LETTERS B,2012,715(1--3):44-60.
APA ATLAS collaboration.(2012).Search for scalar top quark pair production in natural gauge mediated supersymmetry models with the ATLAS detector in pp collisions at root s=7 TeV.PHYSICS LETTERS B,715(1--3),44-60.
MLA ATLAS collaboration."Search for scalar top quark pair production in natural gauge mediated supersymmetry models with the ATLAS detector in pp collisions at root s=7 TeV".PHYSICS LETTERS B 715.1--3(2012):44-60.
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