论文标题
搜索与$ \ sqrt {s} = 13 $ tev $ pp $ collisions与Atlas detector相关的单个顶级夸克产生的暗物质
Search for dark matter produced in association with a single top quark in $\sqrt{s}=13$ TeV $pp$ collisions with the ATLAS detector
论文作者
论文摘要
本文在两吉格斯 - 双doublet模型的背景下以及额外的伪级中介器（$ a $ a $）介绍了对暗物质的搜索。 LHC首次探索了与2hdm+$ a $ a型中的单个顶级夸克相关的伪级中介器的过程。考虑了几种最终状态，其中包括一个或两个带电的瘦素（电子或插座）和大量缺失的横向动量。该分析基于使用ATLAS实验收集的质子 - 普罗顿碰撞数据，$ \ sqrt {s} = 13 $ tev在LHC Run2（2015-2018）期间，对应于139 fb $^{ - 1} $的集成亮度。没有发现高于标准模型预测的显着多余。结果表示为对所考虑的信号模型参数的95％置信度限制。
This paper presents a search for dark matter in the context of a two-Higgs-doublet model together with an additional pseudoscalar mediator, $a$, which decays into the dark-matter particles. Processes where the pseudoscalar mediator is produced in association with a single top quark in the 2HDM+$a$ model are explored for the first time at the LHC. Several final states which include either one or two charged leptons (electrons or muons) and a significant amount of missing transverse momentum are considered. The analysis is based on proton-proton collision data collected with the ATLAS experiment at $\sqrt{s} = 13$ TeV during LHC Run2 (2015-2018), corresponding to an integrated luminosity of 139 fb$^{-1}$. No significant excess above the Standard Model predictions is found. The results are expressed as 95% confidence-level limits on the parameters of the signal models considered.
