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arXiv 1606.08076hep-ex
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q_rt(s)= 8 TeV的pp碰撞中0-4轻子末态R宇称破坏超对称性的计算

Searches for R-parity-violating supersymmetry in pp collisions at sqrt(s) = 8 TeV in final states with 0-4 leptons

CMS Collaboration

摘要:

结果从搜索的R-宇称违反超对称性事件产生的PP碰撞在sqrt(S)= 8 TeV的LHC。具有0、1、2或多个轻子的末态被独立地考虑。对CMS实验收集的数据进行了分析,该实验对应于19.5个反飞秒的积分亮度。未观察到超过标准模型预期的事件,并对超对称粒子质量和生产截面设定了95%置信水平限值。结果被解释在模型中具有R-宇称违反衰变的最轻的超对称粒子,这在研究的情况下可以是胶子,底夸克,或中性伴子。在一个具有重子数破坏的胶子对产生模型中,分别在一个完全强子和一个轻子的末态下,通过分析,排除了质量小于0.98和1.03 TeV的胶子。在一个双轻子末态的分析是用来排除底夸克与质量小于307 GeV的模型考虑底夸克对生产。多轻子末态被认为是在强或电弱的超伴子产生的背景下,并被用来限制最轻的超对称粒子的质量。这些限制范围从300至900 GeV的轻子模型和高达约700 GeV的模型与半轻子R-宇称违反耦合。

英文摘要:

Results are presented from searches for R-parity-violating supersymmetry in events produced in pp collisions at sqrt(s) = 8 TeV at the LHC. Final states with 0, 1, 2, or multiple leptons are considered independently. The analysis is performed on data collected by the CMS experiment corresponding to an integrated luminosity of 19.5 inverse femtobarns. No excesses of events above the standard model expectations are observed, and 95% confidence level limits are set on supersymmetric particle masses and production cross sections. The results are interpreted in models featuring R-parity-violating decays of the lightest supersymmetric particle, which in the studied scenarios can be either the gluino, a bottom squark, or a neutralino. In a gluino pair production model with baryon number violation, gluinos with a mass less than 0.98 and 1.03 TeV are excluded, by analyses in a fully hadronic and one-lepton final state, respectively. An analysis in a dilepton final state is used to exclude bottom squarks with masses less than 307 GeV in a model considering bottom squark pair production. Multilepton final states are considered in the context of either strong or electroweak production of superpartners, and are used to set limits on the masses of the lightest supersymmetric particles. These limits range from 300 to 900 GeV in models with leptonic and up to approximately 700 GeV in models with semileptonic R-parity-violating couplings.

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