未来轻子对撞机暗物质搜寻的Mono-Z信号及宇宙学解释
Mono-Z signal for dark matter searches at future lepton colliders and cosmological interpretation
- Indian Institute of Technology Guwahati（印度理工学院古瓦哈提分校）
- Indian Institute of Technology Hyderabad（印度理工学院海得拉巴分校）
- Université Grenoble-Alpes（格勒诺布尔阿尔卑斯大学）
- Indian Institute of Technology Kanpur（印度理工学院坎普尔分校）
- Indian Institute of Science Education and Research Thiruvananthapuram（印度科学与教育研究所特里凡得琅分校）
- University of the Witwatersrand（威特沃特斯兰德大学）
- SGTB Khalsa College, University of Delhi（德里大学 SG TB 卡尔萨学院）
机构由 AI 辅助整理，请以论文原文为准。
AI总结：
本文在DMEFT框架下研究未来正负电子对撞机的mono-Z信号，分类算子并考虑多种约束，发现四类算子具有发现潜力，可探测多TeV能标。
AI中文摘要：
我们在暗物质有效场论（DMEFT）框架内，研究了未来正负电子对撞机上的mono-$Z$特征，考虑了标量、费米子和矢量暗物质（DM）候选者中维度不超过六的算子。根据其潜在的产生机制对算子进行分类。通过施加观测到的暗物质遗迹丰度以及直接和间接探测约束、希格斯不可见衰变极限和通过重铸分析获得的LHC mono-$Z$界限，我们确定了现象学上可行的参数空间。我们研究了未来$e^-e^+$对撞机上幸存暗物质算子的发现前景，包括初态和末态辐射、探测器模拟以及轻子和强子$Z$玻色子衰变模式的重建。我们利用缺失能量、缺失横向动量、反冲质量、$Z$玻色子赝快度以及束流极化，这些在区分信号与标准模型背景方面起着重要作用。我们发现费米子偶极、标量轻子型、矢量希格斯门户和规范门户暗物质算子提供了稳健的mono-$Z$发现潜力，可探测多TeV有效能标。
英文摘要：
We investigate mono-$Z$ signature at the future electron-positron collider within the dark matter effective field theory (DMEFT) framework, considering operators up to dimension six for scalar, fermionic, and vector dark matter (DM) candidates. The operators are classified according to their underlying production mechanisms. We identify the phenomenologically viable parameter space by imposing the observed DM relic abundance together with direct and indirect detection constraints, Higgs invisible decay limits, and LHC mono-$Z$ bounds obtained through a recasting analysis. We study the discovery prospects of the surviving DM operators at the future $e^-e^+$ collider including initial and final state radiation, detector simulation, and the reconstruction of both leptonic and hadronic $Z$-boson decay modes. We exploit missing energy, missing transverse momentum, recoil mass, $Z$-boson pseudorapidity, together with beam polarization, which play a significant role to distinguish the signal from the Standard Model background. We find that fermionic dipole, scalar leptophilic, vector Higgs-portal, and gauge-portal DM operators offer robust mono-$Z$ discovery potential, probing multi-TeV effective scales.
