Low-Mass Dark Matter Search with the DarkSide-50 Experiment
Low-Mass Dark Matter Search with the DarkSide-50 Experiment
复制标题
使用 DarkSide-50 实验进行低质量暗物质搜索
DOI：
10.1103/physrevlett.121.081307
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发表时间：
2018
影响因子：
8.6
通讯作者：
Batignani, G.
中科院分区：
文献类型：
--
作者：
Agnes, P.;Albuquerque, I. F.;Alexander, T.;Alton, A. K.;Araujo, G. R.;Asner, D. M.;Ave, M.;Back, H. O.;Baldin, B.;Batignani, G.
我们提出了一个暗物质弱相互作用的大质量粒子（WIMPs）的搜索结果，在质量范围低于使用低放射性氩的目标与6786.0公斤的曝光。这些数据是在Gran Sasso的Acuatori Nazionali del Gran Sasso使用DarkSide-50仪器获得的。分析基于电离信号，DarkSide-50时间投影室对此完全有效。在探测器中观测到的速率约为并且几乎完全由已知的背景源来解释。我们获得了90%的C. L。排除限制以上的自旋无关的横截面的暗物质的WIMP核子，扩大了排斥区的暗物质低于以前的限制范围。
We present the results of a search for dark matter weakly interacting massive particles (WIMPs) in the mass range belowusing a target of low-radioactivity argon with a 6786.0 kg d exposure. The data were obtained using the DarkSide-50 apparatus at Laboratori Nazionali del Gran Sasso. The analysis is based on the ionization signal, for which the DarkSide-50 time projection chamber is fully efficient at. The observed rate in the detector atis aboutand is almost entirely accounted for by known background sources. We obtain a 90% C.L. exclusion limit abovefor the spin-independent cross section of dark matter WIMPs on nucleons, extending the exclusion region for dark matter below previous limits in the range.