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arXiv 1609.09386hep-ex
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sqrt(s)= 13 TeV质子-质子碰撞中单轻子多喷注事件的超对称性研究

Search for supersymmetry in events with one lepton and multiple jets in proton-proton collisions at sqrt(s) = 13 TeV

CMS Collaboration

摘要:

超对称性的搜索是在一个单一的电子或μ子在质子-质子碰撞的事件中进行的,质心能量为13 TeV。这些数据是由大型强子对撞机上的CMS实验记录的,对应的积分亮度为2.3个毫微微粒子。几个排他性的搜索区域定义的基础上的喷流和b标记的喷流的数量,喷流的横向动量的标量和,以及缺少的横向动量和轻子的横向动量的标量和。观测数据中的事件产额与标准模型过程的预期背景是一致的。结果解释使用两个简化模型的超对称粒子谱,这两个描述胶子对生产。在第一个模型中,每个胶子都通过三体过程衰变为顶夸克和中性伴子,这与事件中观察到的横向动量丢失有关。质量在1.6 TeV以下的胶子被排除在质量低于600 GeV的中性伴子之外。在第二个模型中,每个胶子通过三体过程衰变为两个轻夸克和一个电荷伴子,电荷伴子随后衰变为一个W玻色子和一个中性伴子。电荷伴子的质量取在胶子和中性伴子质量的中间。在这个模型中,质量低于1.4 TeV的胶子被排除在质量低于700 GeV的中性伴子之外。

英文摘要:

A search for supersymmetry is performed in events with a single electron or muon in proton-proton collisions at a center-of-mass energy of 13 TeV. The data were recorded by the CMS experiment at the LHC and correspond to an integrated luminosity of 2.3 inverse femtobarns. Several exclusive search regions are defined based on the number of jets and b-tagged jets, the scalar sum of the jet transverse momenta, and the scalar sum of the missing transverse momentum and the transverse momentum of the lepton. The observed event yields in data are consistent with the expected backgrounds from standard model processes. The results are interpreted using two simplified models of supersymmetric particle spectra, both of which describe gluino pair production. In the first model, each gluino decays via a three-body process to top quarks and a neutralino, which is associated with the observed missing transverse momentum in the event. Gluinos with masses up to 1.6 TeV are excluded for neutralino masses below 600 GeV. In the second model, each gluino decays via a three-body process to two light quarks and a chargino, which subsequently decays to a W boson and a neutralino. The mass of the chargino is taken to be midway between the gluino and neutralino masses. In this model, gluinos with masses below 1.4 TeV are excluded for neutralino masses below 700 GeV.

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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