发表机构
University of Helsinki; Helsinki Institute of Physics（赫尔辛基大学; 赫尔辛基物理研究所）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
LZ实验观测到248 keV核反冲事件，本文提出宇宙线加速暗物质与动量依赖相互作用可解释该事件，并在非相对论有效理论中分析反冲谱。
AI 中文摘要
LZ实验最近报告观测到一个具有核反冲特征的单事件，其反冲能量高达248 keV，而预期在该能量下没有背景事件。我们表明，这种核反冲事件可能由高速度暗物质粒子引起，这些粒子源自与高能宇宙线的相互作用。我们在非相对论有效理论框架内分析了宇宙线加速暗物质所产生的预期反冲谱，并表明动量依赖算符，如$\mathcal{O}_6$和$\mathcal{O}_{10}$，可以产生在观测能量处达到峰值的谱。
英文摘要
The LZ experiment has recently reported an observation of a single event with characteristics of a nuclear recoil at a high recoil energy of 248 keV, where no background events are expected. We show that such nuclear recoil event could be caused by high velocity dark matter particles originating from interactions with energetic cosmic rays. We analyze the expected recoil spectrum due to cosmic ray boosted dark matter within the non-relativistic effective theory formalism, and show that momentum-dependent operators, such as $\mathcal{O}_6$ and $\mathcal{O}_{10}$, can produce a spectrum that peaks at the observed energy.
Comments3 pages, 2 figures
