SENSEI: First Direct-Detection Constraints on Sub-GeV Dark Matter from a Surface Run.
SENSEI: First Direct-Detection Constraints on Sub-GeV Dark Matter from a Surface Run.
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SENSEI：首次对表面运行的亚 GeV 暗物质进行直接检测约束。
DOI：
10.1103/physrevlett.121.061803
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发表时间：
2018
影响因子：
8.6
通讯作者：
T. Yu
中科院分区：
文献类型：
--
作者：
M. Crisler;R. Essig;J. Estrada;G. Fernandez;J. Tiffenberg;M. S. Haro;T. Volansky;T. Yu
亚电子噪声Skipper CCD实验仪器（SENSEI）使用最近开发的Skipper CCD技术来搜索亚GeV暗物质粒子与硅中电子相互作用产生的电子反冲。我们报告的第一个结果，从原型SENSEI探测器，收集0.019克天的调试数据在费米国家加速器实验室地面以上。这些调试数据足以为质量在500 keV和4 MeV之间的暗物质粒子设置新的直接检测约束。此外，由于这些数据是在表面上获得的，它们不利于先前允许的质量在1000 keV到几百MeV之间的强相互作用暗物质粒子。我们讨论了这些数据对几个暗物质候选者的影响，其中包括一个模型，该模型被提出来解释EDGES合作组织观察到的异常大的21厘米信号。SENSEI是第一个致力于寻找暗物质电子反冲的实验，这些结果证明了Skipper-CCD技术在暗物质搜索中的强大功能。
The Sub-Electron-Noise Skipper CCD Experimental Instrument (SENSEI) uses the recently developed Skipper-CCD technology to search for electron recoils from the interaction of sub-GeV dark matter particles with electrons in silicon. We report first results from a prototype SENSEI detector, which collected 0.019 g day of commissioning data above ground at Fermi National Accelerator Laboratory. These commissioning data are sufficient to set new direct-detection constraints for dark matter particles with masses between ∼500 keV and 4 MeV. Moreover, since these data were taken on the surface, they disfavor previously allowed strongly interacting dark matter particles with masses between ∼500 keV and a few hundred MeV. We discuss the implications of these data for several dark matter candidates, including one model proposed to explain the anomalously large 21-cm signal observed by the EDGES Collaboration. SENSEI is the first experiment dedicated to the search for electron recoils from dark matter, and these results demonstrate the power of the Skipper-CCD technology for dark matter searches.
影响因子：
8.6
作者：
Angle, J.;Aprile, E.;Yamashita, M.
通讯作者：
Yamashita, M.