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arXiv 1402.7029hep-ex
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用ATLAS探测器寻找sqrt(s)= 8 TeV pp碰撞中三轻子和缺少横动量事件中电荷伴子和中性伴子的直接产生

Search for direct production of charginos and neutralinos in events with three leptons and missing transverse momentum in sqrt(s) = 8TeV pp collisions with the ATLAS detector

ATLAS Collaboration

摘要:

本文研究了在三轻子末态中直接产生电荷伴子和中性伴子的问题。分析是基于20.3 fb-1的sqrt(s)= 8 TeV的质子-质子碰撞数据提供的大型强子对撞机和记录与ATLAS探测器。观测结果与标准模型的预期和限制是一致的,在R-宇称守恒现象最小超对称标准模型和简化的超对称模型,显着扩展以前的结果。对于简化的直接电荷子超对称模型,($\tildeχ^\pm_1$)和次轻的中性伴子($\tildeχ_2^0$)产生与衰变到最轻的中性伴子($\tildeχ_1^0$)通过所有三代斯莱普子、仅斯陶斯、规范玻色子或希格斯玻色子,分别排除了高达700 GeV、380 GeV、345 GeV或148 GeV的$\tildeχ^\pm_1$和$\tildeχ_2^0$质量,无质量的$\tildeχ_1^0$。

英文摘要:

A search for the direct production of charginos and neutralinos in final states with three leptons and missing transverse momentum is presented. The analysis is based on 20.3 fb-1 of sqrt(s) = 8 TeV proton--proton collision data delivered by the Large Hadron Collider and recorded with the ATLAS detector. Observations are consistent with the Standard Model expectations and limits are set in R-parity-conserving phenomenological Minimal Supersymmetric Standard Models and in simplified supersymmetric models, significantly extending previous results. For simplified supersymmetric models of direct chargino ($\tildeχ^\pm_1$) and next-to-lightest neutralino ($\tildeχ_2^0$) production with decays to lightest neutralino ($\tildeχ_1^0$) via either all three generations of sleptons, staus only, gauge bosons, or Higgs bosons, $\tildeχ^\pm_1$ and $\tildeχ_2^0$ masses are excluded up to 700 GeV, 380 GeV, 345 GeV, or 148 GeV respectively, for a massless $\tildeχ_1^0$.

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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