论文标题
搜索与质子 - 普罗顿碰撞中的leptontally腐烂的Z玻色子相关的暗物质，$ \ sqrt {s} = $ 13 tev
Search for dark matter produced in association with a leptonically decaying Z boson in proton-proton collisions at $\sqrt{s} =$ 13 TeV
论文作者
论文摘要
使用具有Z玻色子候选者的事件和较大的横向动量进行搜索对暗物质颗粒进行搜索。该分析基于CMS实验在LHC在2016 - 2018年收集的质子 - 质子碰撞数据，该质量中心能量是13 TEV的质量碰撞数据，对应于137 fb $^{ - 1} $的综合发光度。搜索使用衰减频道z $ \ to $ ee和z $ \至$ $μμ$。在标准模型中预期的背景中，未观察到明显过量的事件。在具有矢量，轴向矢量，标量和伪级介体的简化模型的背景下，将限制设置在暗物质粒子的产生上，以及具有额外的伪级介质的两higgs-doublet模型。另外，为自旋依赖性和自旋依赖性散射截面提供了限制，并将其与直接检测实验的界限进行了比较。结果也可以在无形的希格斯玻色子腐烂，非颗粒和较大额外维度的模型的背景下进行解释。
A search for dark matter particles is performed using events with a Z boson candidate and large missing transverse momentum. The analysis is based on proton-proton collision data at a center-of-mass energy of 13 TeV, collected by the CMS experiment at the LHC in 2016-2018, corresponding to an integrated luminosity of 137 fb$^{-1}$. The search uses the decay channels Z $\to$ ee and Z $\to$ $μμ$. No significant excess of events is observed over the background expected from the standard model. Limits are set on dark matter particle production in the context of simplified models with vector, axial-vector, scalar, and pseudoscalar mediators, as well as on a two-Higgs-doublet model with an additional pseudoscalar mediator. In addition, limits are provided for spin-dependent and spin-independent scattering cross sections and are compared to those from direct-detection experiments. The results are also interpreted in the context of models of invisible Higgs boson decays, unparticles, and large extra dimensions.
