发表机构
Imperial College London; Karlsruhe Institute of Technology (KIT)（帝国理工学院; 卡尔斯鲁厄理工学院）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本文研究 LZ 高反冲事件对应的热电弱暗物质，指出其超出 LHC 探测范围，并提出 FCC-hh 与缪子对撞机可通过消失径迹等通道检验该解释。
AI 中文摘要
LUX-ZEPLIN 报告的高能核反冲候选事件可能指向超出 LHC 探测范围的暗物质。我们研究了未来对撞机如何检验这种解释，从热 Higgsino 开始，并扩展到包含中性粒子和带电粒子的一类广泛的电弱多重态。我们假设存在一个由精确稳定对称性保护的近似纯多重态，其中非弹性 Z 交换占主导，且暗物质丰度完全由规范主导的热冻结过程设定，混合以及影响产生或冻结的额外相互作用可忽略不计。在此设定下，重的热质量、稀有的产生过程以及不可见的中性跃迁使得 Higgsino 的主要对撞机障碍在该类多重态中具有普遍性，与超对称无关。带电粒子的寿命各不相同，但所研究的基准谱（包括辐射双峰劈裂）仍超出预期的 HL-LHC 探测范围。我们展示了 FCC-hh 和高能缪子对撞机如何克服这些障碍。我们的 FCC-hh 估计显示，通过消失的带电径迹以及不依赖于带电寿命的互补通道，对双峰和几个更大的多重态具有敏感性。缪子对撞机的预测覆盖了 10 TeV 下的费米子双峰和三峰，以及 30 TeV 下本文考虑的全部费米子族，前提是上述谱和系统学假设成立。这将可能的地下信号与未来对撞机上检验热电弱暗物质的具体计划联系起来。
英文摘要
The high-energy nuclear-recoil candidate reported by LUX-ZEPLIN could point to dark matter beyond the reach of the LHC. We examine how future colliders could test this interpretation, starting with the thermal Higgsino and extending to a broad class of electroweak multiplets containing neutral and charged particles. We assume an approximately pure multiplet protected by an exact stabilizing symmetry, with dominant inelastic Z exchange and the full dark-matter abundance set by gauge-dominated thermal freeze-out, where mixing and additional interactions affecting production or freeze-out are negligible. In this setting, heavy thermal masses, rare production and invisible neutral transitions make the Higgsino's main collider obstacles generic across the class, independently of supersymmetry. Charged lifetimes vary, but the benchmark spectra studied, including radiative doublet splittings, remain beyond the projected HL-LHC reach. We show how FCC-hh and a high-energy muon collider can overcome these obstacles. Our FCC-hh estimates show sensitivity to the doublets and several larger multiplets through disappearing charged tracks and complementary channels that do not depend on the charged lifetime. Muon-collider projections cover the fermionic doublet and triplet at 10 TeV and the full fermionic family considered here at 30 TeV, subject to the stated spectrum and systematic assumptions. This connects a possible underground signal to a concrete program for testing thermal electroweak dark matter at future colliders.
