Limits on light WIMPs with a germanium detector at 177 eVee threshold at the China Jinping Underground Laboratory
Limits on light WIMPs with a germanium detector at 177 eVee threshold at the China Jinping Underground Laboratory
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中国锦屏地下实验室的锗探测器在 177 eVee 阈值下对轻 WIMP 的限制
DOI：
10.1103/physrevd.90.032003
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发表时间：
2014-03
期刊：
影响因子：
--
通讯作者：
Z. H. Zhu
中科院分区：
文献类型：
--
作者：
J. J. Zhu;W. B. Zhu;X. Z. Zhu;Z. H. Zhu
中国暗物质实验报告了在中国锦屏地下实验室使用总质量为20 g的锗探测器阵列进行的轻WIMP暗物质搜索的结果。在50%信号效率下，实现的物理阈值为177 eVee（“ee”表示电子等效能量）。用0.784 kg-days的数据导出了与核子自旋无关耦合的排斥区，改进了我们以前在WIMP质量小于4.6 GeV时的边界。
The China Dark Matter Experiment reports results on light WIMP dark matter searches at the China Jinping Underground Laboratory with a germanium detector array with a total mass of 20 g. The physics threshold achieved is 177 eVee ("ee" represents electron equivalent energy) at 50% signal efficiency. With 0.784 kg-days of data, exclusion region on spin-independent coupling with the nucleon is derived, improving over our earlier bounds at WIMP mass less than 4.6 GeV.