Search for direct top squark pair production in events with one lepton, jets, and missing transverse momentum at 13 TeV with the CMS experiment
Search for direct top squark pair production in events with one lepton, jets, and missing transverse momentum at 13 TeV with the CMS experiment
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DOI：
10.1007/jhep05(2020)032
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发表时间：
2020-05
影响因子：
5.4
通讯作者：
A. Sirunyan;A. Tumasyan;W. Adam;F. Ambrogi;T. Bergauer;J. Brandstetter;M. Dragicevic;J. Erö
中科院分区：
文献类型：
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作者：
A. Sirunyan;A. Tumasyan;W. Adam;F. Ambrogi;T. Bergauer;J. Brandstetter;M. Dragicevic;J. Erö
提出了直接产生顶夸克对的方法。该搜索基于2016年，2017年和2018年期间在LHC的CMS实验记录的质心能量为13 TeV的质子-质子碰撞数据，对应于137 fb− 1的积分光度。搜索是使用一个孤立的电子或μ子，多个喷流和大的横向动量不平衡的事件进行的。观察到的数据与标准模型过程的预期一致。排除是在简化的顶夸克对产生模型的背景下设置的。根据该模型，排除限制在95%的置信水平上的最高夸克质量高达1.2 TeV的设置为无质量的最轻的超对称粒子，假设是中性伴子。对于顶夸克质量为1 TeV的模型，中性伴子质量高达600 GeV被排除在外。
A search for direct top squark pair production is presented. The search is based on proton-proton collision data at a center-of-mass energy of 13 TeV recorded by the CMS experiment at the LHC during 2016, 2017, and 2018, corresponding to an integrated luminosity of 137 fb− 1. The search is carried out using events with a single isolated electron or muon, multiple jets, and large transverse momentum imbalance. The observed data are consistent with the expectations from standard model processes. Exclusions are set in the context of simplified top squark pair production models. Depending on the model, exclusion limits at 95% confidence level for top squark masses up to 1.2 TeV are set for a massless lightest supersymmetric particle, assumed to be the neutralino. For models with top squark masses of 1 TeV, neutralino masses up to 600 GeV are excluded.