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arXiv 2607.10716hep-ph

作为核跃迁中轻暗物质探测手段的米格达尔电离

Migdal Ionization as a Probe of Light Dark Matter from Nuclear Transition

Yuanchao Lou, Liangliang Su, Lei Wu

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中文总结 AI 辅助

研究利用锗探测器中米格达尔效应探测反应堆产生的轻暗物质,通过TEXONO实验开-关剩余光谱,在0.01 MeV≤mχ≈2.6 MeV质量范围对暗物质与原子核相互作用设新限制,补充现有相关限制。

中文摘要 AI 辅助

核反应堆是轻暗物质的关键人工来源。直接探测反应堆产生的暗物质面临重大障碍,因为猝灭效应会将传统弹性散射信号抑制到探测器阈值以下。我们提出一种新的搜索策略,利用锗探测器中的米格达尔效应来探测反应堆核去激发产生的轻暗物质。通过TEXONO实验的开-关剩余光谱,我们在质量范围0.01 MeV≤mχ≈2.6 MeV内对暗物质与原子核的相互作用设定了新的严格限制,为现有宇宙学和天体物理学限制提供了补充。

英文摘要

Nuclear reactors serve as a key artificial source of light dark matter. Direct detection of reactor-produced dark matter faces substantial obstacles, since quenching effects suppress conventional elastic scattering signals below detector thresholds. We present a new search strategy utilizing the Migdal effect in germanium detectors to probe light dark matter produced via nuclear de-excitation from reactors. Using ON-OFF residual spectra from the TEXONO experiment, we set a new stringent limit on the dark matter and nucleus interaction over the mass range $0.01\,\text{MeV}\le m_χ\lesssim 2.6\,\text{MeV}$, which provides a complementary bound to existing cosmological and astrophysical limits.

发表机构

  • Nanjing Normal University(南京师范大学)
  • Karlsruhe Institute of Technology(卡尔斯鲁厄理工学院)

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补充信息

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