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arXiv 1109.6572hep-ex
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在sqrt(s)= 7 TeV质子-质子碰撞中用ATLAS探测器寻找具有喷流和丢失横动量的末态夸克和胶子

Search for squarks and gluinos using final states with jets and missing transverse momentum with the ATLAS detector in sqrt(s) = 7 TeV proton-proton collisions

ATLAS Collaboration

摘要:

在含有喷流、缺少横动量和没有电子或μ子的事件中寻找方子和胶子。这些数据是在2011年由ATLAS实验在大型强子对撞机的sqrt(s)= 7 TeV质子-质子碰撞中记录的。在1.04 fb^-1的数据中没有观察到超过标准模型背景期望值的情况。在95%的置信水平下,在仅包含前两代方夸克、一个胶子八重体和一个无质量中性伴子的简化模型中,胶子和夸克质量分别低于700 GeV和875 GeV被排除在外。排斥极限增加到1075 GeV的平方和胶子相同的质量。在tan(beta)=10,A_0=0,μ> 0的MSUGRA/CMSSM模型中,当质量低于950 GeV时,等质量的夸克和胶子被排除在外。这些限制扩展了先前测量所排除的超对称参数空间的区域。

英文摘要:

A search for squarks and gluinos in events containing jets, missing transverse momentum and no electrons or muons is presented. The data were recorded in 2011 by the ATLAS experiment in sqrt(s) = 7 TeV proton-proton collisions at the Large Hadron Collider. No excess above the Standard Model background expectation is observed in 1.04 fb^-1 of data. Gluino and squark masses below 700 GeV and 875 GeV respectively are excluded at the 95% confidence level in simplified models containing only squarks of the first two generations, a gluino octet and a massless neutralino. The exclusion limit increases to 1075 GeV for squarks and gluinos of equal mass. In MSUGRA/CMSSM models with tan(beta)=10, A_0=0 and mu> 0, squarks and gluinos of equal mass are excluded for masses below 950 GeV. These limits extend the region of supersymmetric parameter space excluded by previous measurements.

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