通过宇宙射线增强暗物质的视角细看LZ 248 keV事件
A closer look at the LZ 248 keV event through the lens of cosmic-ray boosted dark matter
浏览论文内容
中文总结 AI 辅助
本文研究宇宙射线增强暗物质能否解释LZ实验观测到的248 keV核反冲事件，发现自旋相关赝标量介体（质量约300 MeV）可提供可行解释。
中文摘要 AI 辅助
我们研究宇宙射线增强暗物质（CRDM）能否解释LUX-ZEPLIN（LZ）合作组观测到的248 keV核反冲事件。我们考虑由赝标量介导的自旋相关相互作用，并在CRDM的产生、传播和探测中纳入相对论运动学。我们发现，自旋相关相互作用可以在观测感兴趣区域内产生足够数量的核反冲，而不会在尚未观测到的较低能量处产生事件。然而，对于对应于非相对论有效算符$\mathbb{O}_6$的基准赝标量相互作用，产生观测事件所需的耦合对应的能量尺度与动量转移尺度相当，这使得接触相互作用方法面临挑战。相反，我们发现质量约为300 MeV且耦合常数为$O(1)$的赝标量介体可以为这一未解释事件提供一个有前景的解决方案。
英文摘要
We investigate whether cosmic ray boosted dark matter (CRDM) can explain the 248 keV nuclear recoil event observed by the LUX-ZEPLIN (LZ) collaboration. We consider spin-dependent interactions, mediated by a pseudoscalar, and incorporate relativistic kinematics in CRDM production, propagation, and detection. We find that spin-dependent interactions can produce sufficient number of nuclear recoils in the observed region of interest, without populating events at lower energies, which have not been observed. However, for a benchmark pseudoscalar interaction corresponding to the non-relativistic effective operator $\mathbb{O}_6$, the coupling required to produce the observed event corresponds to an energy scale comparable to the momentum transfer scales, thus making contact interaction approach challenging. Instead, we find that a pseudoscalar mediator with mass $\sim 300\,$MeV and $O(1)$ couplings can provide a promising solution to this unexplained event.
发表机构
- Birla Institute of Technology and Science（比拉理工学院）
- Indian Institute of Technology Bombay（孟买印度理工学院）
机构由 AI 辅助整理，请以论文原文为准。
