跃迁磁偶极暗物质与LZ230616高反冲候选事例
Transition magnetic-dipole dark matter and the LZ230616 high-recoil candidate
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中文总结 AI 辅助
本文用跃迁磁偶极暗物质解释LZ230616的248-keV候选事例，通过热丰度固定磁矩，拟合质量劈裂，并评估了探测器响应及间接探测约束。
中文摘要 AI 辅助
跃迁磁偶极子将一个吸热核反冲与一个延迟光子联系起来。我们研究了LZ230616的这一解释，即LZ扩展能量搜索中的248-keV候选事例。在点超荷理论中施加热丰度，在优选质量附近固定了一个约为$2.4 \times 10^{-4} \mathrm{TeV}^{-1}$的磁矩，留下了一个质量-劈裂拟合。激发态传播约0.6 m，使其衰变与孤立反冲选择相关。位置依赖的TPC逃逸响应给出了条件最大值：在没有高能边带时为$(1.07 \\,\mathrm{TeV},346 \\,\mathrm{keV} )$，在有零计数代理时为$(0.44 \\,\mathrm{TeV},321 \\,\mathrm{keV})$。它们的线速率超过H.E.S.S. Einasto界限约11倍和5.5倍。我们检查了晕依赖、其他直接和间接探测以及带电中介匹配。允许更小的磁矩和额外的湮灭保持了低质量最大值，同时允许在0.1--100 TeV范围内更重的拟合。延迟反冲-光子数据可以测量劈裂和磁矩，从而检验探测器响应和与热湮灭的假定联系。
英文摘要
A transition magnetic dipole connects an endothermic nuclear recoil to a delayed photon. We study this interpretation of LZ230616, the 248-keV candidate in LZ's extended-energy search. Imposing the thermal abundance in a point hypercharge theory fixes a moment near $2.4 \times 10^{-4} \mathrm{TeV}^{-1}$ at the preferred masses, leaving a mass--splitting fit. The excited state travels about 0.6 m, making its decay relevant to the isolated-recoil selection. A position-dependent TPC-exit response gives conditional maxima at $(1.07 \,\mathrm{TeV} ,346 \,\mathrm{keV} )$ without the high-energy sideband and $(0.44 \,\mathrm{TeV} ,321 \,\mathrm{keV})$ with its zero-count proxy. Their line rates exceed the H.E.S.S. Einasto bound by factors of about 11 and 5.5. We examine halo dependence, other direct and indirect probes, and charged-messenger matching. Allowing a smaller moment and additional annihilation preserves the low-mass maxima while admitting heavier fits over 0.1--100 TeV. Delayed recoil--photon data can measure the splitting and moment, testing both the detector response and the assumed connection to thermal annihilation.
发表机构
- City University of Hong Kong（香港城市大学）
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