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
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
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DOI：
10.1016/j.physletb.2011.05.061
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发表时间：
2011-02
影响因子：
4.4
通讯作者：
The Atlas Collaboration
中科院分区：
文献类型：
--
作者：
The Atlas Collaboration
寻找含有喷流、缺少横动量且没有电子或μ子的末态的方子和胶子。这些数据是由ATLAS实验在大型强子对撞机上记录的根s= 7 TeV的质子-质子碰撞。在35 pb（-1）的分析数据中未观察到超过标准模型背景预期的情况。在仅包含前两代方子、一个胶子八重态和一个无质量中性伴子的简化模型中，在95%的置信水平下排除了500 GeV以下的胶子质量。排斥增加到870 GeV相同质量的平方和胶子。在tan β = 3，A（0）= 0和mu> 0的MSUGRA/CMSSM模型中，在775 GeV以下的能量范围内，不包括质量相等的方夸克和胶子。这是迄今为止最严格的限制。
A search for squarks and gluinos in final states containing jets, missing transverse momentum and no electrons or muons is presented. The data were recorded by the ATLAS experiment in root s= 7 TeV proton-proton collisions at the Large Hadron Collider. No excess above the Standard Model background expectation was observed in 35 pb (-1) of analysed data. Gluino masses below 500 GeV 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 increases to 870 GeV for equal mass squarks and gluinos. In MSUGRA/CMSSM models with tan beta= 3, A (0)= 0 and mu> 0, squarks and gluinos of equal mass are excluded below 775 GeV. These are the most stringent limits to date.