使用EDELWEISS锗探测器和NbSi TES传感器通过Migdal效应搜索sub-GeV暗物质
Search for sub-GeV Dark Matter via Migdal effect with an EDELWEISS germanium detector with NbSi TES sensors
摘要：
EDELWEISS合作报告了通过Migdal效应寻找暗物质（DM）粒子相互作用的研究，其中$32$ MeV $\cdot$ c $^{-2}$与$2$ GeV $\cdot$ c $^{-2}$之间的质量之间的相互作用，使用的是一个$200$ g低温Ge探测器，该探测器对同时产生的热和电离信号敏感，并在法国Modane南部的地下运行。使用由NbSi薄膜制成的跃迁边缘传感器读出声子信号。将检测器偏置在$66$ V，以便受益于Neganov-Trofimov-Luke放大，并导致$4.46$ eV $_{ee}$（RMS）的电子反冲能量分辨率和$30$ eV $_{ee}$的分析阈值。灵敏度受到与检测器中的电荷产生无关的主导背景的限制。该搜索将横截面的参数空间的新区域约束为下至$10^{-29}$ cm $^2$和$32$与$100$ MeV $\cdot$ c $^{-2}$之间的质量。用NbSi传感器实现的低阈值显示了其用于低质量DM搜索的热声子敏感装置的相关性。
英文摘要：
The EDELWEISS collaboration reports on the search for Dark Matter (DM) particle interactions via Migdal effect with masses between $32$ MeV$\cdot$c$^{-2}$ to $2$ GeV$\cdot$c$^{-2}$ using a $200$ g cryogenic Ge detector sensitive to simultaneously heat and ionization signals and operated underground at the Laboratoire Souterrain de Modane in France. The phonon signal was read out using a Transition Edge Sensor made of a NbSi thin film. The detector was biased at $66$ V in order to benefit from the Neganov-Trofimov-Luke amplification and resulting in a resolution on the energy of electron recoils of $4.46$ eV$_{ee}$ (RMS) and an analysis threshold of $30$ eV$_{ee}$. The sensitivity is limited by a dominant background not associated to charge creation in the detector. The search constrains a new region of parameter space for cross-sections down to $10^{-29}$ cm$^2$ and masses between $32$ and $100$ MeV$\cdot$c$^{-2}$. The achieved low threshold with the NbSi sensor shows the relevance of its use for athermal-phonon sensitive devices for low-mass DM searches.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
