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arXiv 1602.09058hep-ex
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用ATLAS探测器寻找末态下含喷注和两个同号轻子或三个轻子的$\sqrt{s}=13$ TeV超对称性

Search for supersymmetry at $\sqrt{s}=13$ TeV in final states with jets and two same-sign leptons or three leptons with the ATLAS detector

ATLAS Collaboration

摘要:

使用涉及多个高能喷流和具有相同电荷的两个孤立轻子($e$或$μ$)或至少三个孤立轻子的签名来进行对强产生的超对称粒子的搜索。搜索还利用$b$标记的喷流,缺少横向动量和其他可观测量,以扩大其灵敏度。该分析使用了2015年大型强子对撞机ATLAS探测器记录的$\sqrt{s}=13$ TeV质子-质子碰撞的数据样本,对应于3.2 fb $^{-1}$的总积分亮度。没有观察到显著超过标准模型预期的情况。结果解释在几个简化的超对称模型,并从以前的搜索扩展排除限制。在独家生产和简化衰变模式的背景下,在95%的置信水平下排除了1.1-1.3 TeV的轻中性伴子(取决于衰变通道)的胶子质量,底夸克质量也被排除到540 GeV。在前一种情况下,中性伴子质量也被排除在550-850 GeV的胶子质量约1 TeV。

英文摘要:

A search for strongly produced supersymmetric particles is conducted using signatures involving multiple energetic jets and either two isolated leptons ($e$ or $μ$) with the same electric charge or at least three isolated leptons. The search also utilises $b$-tagged jets, missing transverse momentum and other observables to extend its sensitivity. The analysis uses a data sample of proton-proton collisions at $\sqrt{s}=13$ TeV recorded with the ATLAS detector at the Large Hadron Collider in 2015 corresponding to a total integrated luminosity of 3.2 fb$^{-1}$. No significant excess over the Standard Model expectation is observed. The results are interpreted in several simplified supersymmetric models and extend the exclusion limits from previous searches. In the context of exclusive production and simplified decay modes, gluino masses are excluded at 95% confidence level up to 1.1-1.3 TeV for light neutralinos (depending on the decay channel), and bottom squark masses are also excluded up to 540 GeV. In the former scenarios, neutralino masses are also excluded up to 550-850 GeV for gluino masses around 1 TeV.

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