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arXiv 1908.04722hep-ex
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13 TeV质子-质子碰撞末态超对称性的研究

Search for supersymmetry in proton-proton collisions at 13 TeV in final states with jets and missing transverse momentum

CMS Collaboration

摘要:

结果报告从搜索超对称粒子的最终状态与多个射流和大的失踪横向动量。该搜索使用了2016-2018年CMS探测器收集的$\sqrt{s} =$ 13 TeV的质子-质子碰撞样本,对应于137 fb $^{-1}$的积分亮度,基本上代表了完整的LHC运行2数据样本。分析是在一个四维搜索区域中定义的射流的数量,标记的底夸克射流的数量,射流横向动量的标量和,以及射流横向动量的矢量和的大小。相对于来自标准模型过程的预期背景贡献,未观察到事件产率的显著过量。在超对称粒子产生和衰变过程的简化模型的框架下,得到了胶子和方子对产生的极限。假设最轻的超对称粒子是中性伴子,在95%的置信水平下,得到的胶子质量下限为2000至2310 GeV,而夸克质量下限为1190至1630 GeV,这取决于生产情况。

英文摘要:

Results are reported from a search for supersymmetric particles in the final state with multiple jets and large missing transverse momentum. The search uses a sample of proton-proton collisions at $\sqrt{s} =$ 13 TeV collected with the CMS detector in 2016-2018, corresponding to an integrated luminosity of 137 fb$^{-1}$, representing essentially the full LHC Run 2 data sample. The analysis is performed in a four-dimensional search region defined in terms of the number of jets, the number of tagged bottom quark jets, the scalar sum of jet transverse momenta, and the magnitude of the vector sum of jet transverse momenta. No significant excess in the event yield is observed relative to the expected background contributions from standard model processes. Limits on the pair production of gluinos and squarks are obtained in the framework of simplified models for supersymmetric particle production and decay processes. Assuming the lightest supersymmetric particle to be a neutralino, lower limits on the gluino mass as large as 2000 to 2310 GeV are obtained at 95% confidence level, while lower limits on the squark mass as large as 1190 to 1630 GeV are obtained, depending on the production scenario.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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