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Inclusive search for same-sign dilepton signatures in pp collisions at root s=7 TeV with the ATLAS detector
ATLAS Collaboration
2011
发表期刊JOURNAL OF HIGH ENERGY PHYSICS
期号10
通讯作者Aad, G (reprint author), SUNY Albany, Albany, NY 12222 USA.
摘要An inclusive search is presented for new physics in events with two isolated leptons (e or mu) having the same electric charge. The data are selected from events collected from p p collisions at root s = 7 TeV by the ATLAS detector and correspond to an integrated luminosity of 34 pb(-1). The spectra in dilepton invariant mass, missing transverse momentum and jet multiplicity are presented and compared to Standard Model predictions. In this event sample, no evidence is found for contributions beyond those of the Standard Model. Limits are set on the cross-section in a fiducial region for new sources of same-sign high-mass dilepton events in the ee, e mu and mu mu channels. Four models predicting same-sign dilepton signals are constrained: two descriptions of Majorana neutrinos, a cascade topology similar to supersymmetry or universal extra dimensions, and fourth generation d-type quarks. Assuming a new physics scale of 1 TeV, Majorana neutrinos produced by an effective operator V with masses below 460 GeV are excluded at 95% confidence level. A lower limit of 290 GeV is set at 95% confidence level on the mass of fourth generation d-type quarks.
关键词P(P)OVER-BAR COLLISIONS LHC
学科领域Physics
DOI10.1007/JHEP10(2011)107
收录类别SCI
语种英语
WOS类目Physics, Particles & Fields
WOS记录号WOS:000308326000001
引用统计
被引频次:13[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/311005/213323
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. Inclusive search for same-sign dilepton signatures in pp collisions at root s=7 TeV with the ATLAS detector[J]. JOURNAL OF HIGH ENERGY PHYSICS,2011(10).
APA ATLAS Collaboration.(2011).Inclusive search for same-sign dilepton signatures in pp collisions at root s=7 TeV with the ATLAS detector.JOURNAL OF HIGH ENERGY PHYSICS(10).
MLA ATLAS Collaboration."Inclusive search for same-sign dilepton signatures in pp collisions at root s=7 TeV with the ATLAS detector".JOURNAL OF HIGH ENERGY PHYSICS .10(2011).
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