吸热Z'门户暗物质：LZ-LHC互补性
Endothermic Z'-Portal Dark Matter: LZ-LHC Complementarity
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中文总结 AI 辅助
针对LZ实验的2.6σ高能反冲事件，提出吸热Z'门户Majorana暗物质框架，通过U(1)_{B-L}扩展标准模型，利用暗物质丰度与LHC搜索的互补约束解释该事件，并展望HL-LHC与LZ的协同检验。
中文摘要 AI 辅助
受LUX-ZEPLIN（LZ）合作组最近报告的2.6σ高能反冲事件的启发，我们考虑了一个吸热的Z'门户Majorana暗物质框架，并讨论了LZ事件与LHC对Z'共振搜索之间的互补性。作为一个具体实现，我们考虑了标准模型的规范U(1)_{B-L}扩展。该框架的现象学本质上由两个自由参数控制：U(1)_{B-L}规范耦合g_{BL}和Z'玻色子质量m_{Z'}。对于固定的m_{Z'}，观测到的暗物质丰度要求暗物质质量接近Z'共振，m_{DM} ~ m_{Z'}/2，并对g_{BL}设置了下限。互补地，LHC对Z'共振的搜索对g_{BL}设置了上限。由暗物质丰度和LHC约束所允许的参数空间可以解释最近的LZ事件。未来高亮度LHC的Z'共振搜索与LZ实验之间的协同作用可能为这一框架提供检验。
英文摘要
Motivated by the $2.6σ$ high-energy recoil event recently reported by the LUX-ZEPLIN (LZ) Collaboration, we consider an endothermic $Z^\prime$-portal Majorana dark matter framework and discuss the complementarity between the LZ event and LHC searches for a $Z^\prime$ resonance. As a concrete realization, we consider a gauged U(1) ${B-L}$ extension of the Standard Model. The phenomenology of the framework is essentially controlled by two free parameters: the U(1) ${B-L}$ gauge coupling $g_{BL}$ and the $Z^\prime$ boson mass $m_{Z^\prime}$. For a fixed $m_{Z^\prime}$, the observed dark matter abundance requires the dark matter mass to be near the $Z^\prime$ resonance, $m_{\rm DM} \sim m_{Z^\prime}/2$, and sets a lower bound on $g_{BL}$. Complementarily, LHC searches for a $Z^\prime$ resonance set an upper bound on $g_{BL}$. The parameter space allowed by the dark matter abundance and LHC constraints can account for the recent LZ event. The synergy between future $Z^\prime$ resonance searches at the High-Luminosity LHC and the LZ experiment may provide a test of this framework.
发表机构
- The University of Alabama（阿拉巴马大学）
- St. Mary’s College of Maryland（马里兰州圣玛丽学院）
机构由 AI 辅助整理，请以论文原文为准。
