Search for Dark-Matter–Nucleon Interactions via Migdal Effect with DarkSide-50
Search for Dark-Matter–Nucleon Interactions via Migdal Effect with DarkSide-50
复制标题
通过 Migdal 效应与 DarkSide-50 搜索暗物质 - 核子相互作用
DOI：
10.1103/physrevlett.130.101001
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发表时间：
2023
影响因子：
8.6
通讯作者：
Bonivento, W. M.
中科院分区：
文献类型：
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作者：
Agnes, P.;Albuquerque, I. F. M.;Alexander, T.;Alton, A. K.;Ave, M.;Back, H. O.;Batignani, G.;Biery, K.;Bocci, V.;Bonivento, W. M.
暗物质从原子核的弹性散射可以通过所谓的米格达尔效应导致反冲原子的激发和电离。来自电离电子的能量沉积增加了反冲核系统沉积的能量，并允许检测次质量暗物质的相互作用。我们提出了新的限制亚暗物质使用的双相液氩时间投影室的黑暗面-50实验与曝光。该分析仅基于电离信号，并显着提高了DarkSide-50的灵敏度，使其对质量低至的暗物质的灵敏度达到。此外，它设置了最严格的上限自旋无关的暗物质核子截面的质量低于。
Dark matter elastic scattering off nuclei can result in the excitation and ionization of the recoiling atom through the so-called Migdal effect. The energy deposition from the ionization electron adds to the energy deposited by the recoiling nuclear system and allows for the detection of interactions of sub-mass dark matter. We present new constraints for sub-dark matter using the dual-phase liquid argon time projection chamber of the DarkSide-50 experiment with an exposure of. The analysis is based on the ionization signal alone and significantly enhances the sensitivity of DarkSide-50, enabling sensitivity to dark matter with masses down to. Furthermore, it sets the most stringent upper limit on the spin independent dark matter nucleon cross section for masses below.