论文标题
搜索与单个顶级夸克和一个充满活力的$ w $ boson合作的暗物质，$ \ sqrt {s} = $ 13 tev $ pp $ collisions与地图集检测器碰撞
Search for dark matter produced in association with a single top quark and an energetic $W$ boson in $\sqrt{s}=$ 13 TeV $pp$ collisions with the ATLAS detector
论文作者
论文摘要
本文使用带有单个顶级夸克和充满活力的$ W $ BOSON的事件进行了搜索暗物质，$χ$。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 Run 2（2015-2018）期间，对应于139 fb $^{ - 1} $的集成亮度。搜索考虑了最终状态，以零或一个带电的Lepton（电子或MUON），至少一个$ b $ - 季节和大型缺失的横向动量。此外，在结果的解释中包括了先前搜索的结果。发现数据与标准模型预测非常吻合，并且在一类暗物质模型的背景下，用95％的置信度排除限制来解释结果，该模型涉及扩展的两higgs-doublet扇区以及伪级介体介体粒子。该搜索特别敏感地对带电的Higgs玻色子州的壳生产特别敏感，$ h^{\ pm} $，源于两吉格斯 - doublet的混合以及其通过介体粒子的半可视性衰减，$ a $ a $：$ a $：$ h^{\ pm} \ pm} \ pm} \ rightarrow w^^\ pm pm a（\ rightarrow a（\ rightarrow）。 $ h^{\ pm} $质量的信号模型最多可达1.5 tev和$ a $ 350 GEV，假设tan $β$值为1。$ a $ a $ a $ a $ a $ a $ a $ a $ a $ a $ a $ a $ a $ a $ a $ a $ a $ a $ a $ a $ a $β$ tan $β$ the $β$ the $β$的值最多为$ h^{\ pm pm pm pm} $ h^{\ pm pm} $ sevev and 200（400） tan $β$值在20到30之间的信号被排除在500至800 GEV之间的$ H^{\ pm} $中。
This paper presents a search for dark matter, $χ$, using events with a single top quark and an energetic $W$ boson. The analysis is based on proton-proton collision data collected with the ATLAS experiment at $\sqrt{s}=$ 13 TeV during LHC Run 2 (2015-2018), corresponding to an integrated luminosity of 139 fb$^{-1}$. The search considers final states with zero or one charged lepton (electron or muon), at least one $b$-jet and large missing transverse momentum. In addition, a result from a previous search considering two-charged-lepton final states is included in the interpretation of the results. The data are found to be in good agreement with the Standard Model predictions and the results are interpreted in terms of 95% confidence-level exclusion limits in the context of a class of dark matter models involving an extended two-Higgs-doublet sector together with a pseudoscalar mediator particle. The search is particularly sensitive to on-shell production of the charged Higgs boson state, $H^{\pm}$, arising from the two-Higgs-doublet mixing, and its semi-invisible decays via the mediator particle, $a$: $H^{\pm} \rightarrow W^\pm a (\rightarrow χχ)$. Signal models with $H^{\pm}$ masses up to 1.5 TeV and $a$ masses up to 350 GeV are excluded assuming a tan$β$ value of 1. For masses of $a$ of 150 (250) GeV, tan$β$ values up to 2 are excluded for $H^{\pm}$ masses between 200 (400) GeV and 1.5 TeV. Signals with tan$β$ values between 20 and 30 are excluded for $H^{\pm}$ masses between 500 and 800 GeV.
