First results on low-mass WIMPs from the CDEX-1 experiment at the China Jinping underground laboratory
First results on low-mass WIMPs from the CDEX-1 experiment at the China Jinping underground laboratory
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中国锦屏地下实验室 CDEX-1 实验的低质量 WIMP 首个结果
DOI：
10.1103/physrevd.88.052004
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发表时间：
2013-06
期刊：
影响因子：
--
通讯作者：
Ke Jun Kang
中科院分区：
文献类型：
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作者：
Ke Jun Kang;Ke Jun Kang
中国暗物质实验合作报告了WIMP暗物质的第一个实验极限，该极限来自中国锦屏地下实验室的994 g p型点接触锗探测器获得的14.6 kg-天的数据，该实验室的岩石覆盖层超过2400 m。达到的能量阈值为400 eVee。根据14.6 kg-天的实时数据，在区分体信号和表面背景之前，我们将N= 1.75 * 10^{-40} cm^{2}作为WIMP质量为7 GeV的自旋无关截面的90%置信水平的极限。
The China Dark matter Experiment collaboration reports the first experimental limit on WIMP dark matter from 14.6 kg-day of data taken with a 994 g p-type point-contact germanium detector at the China Jinping underground Laboratory where the rock overburden is more than 2400 m. The energy threshold achieved was 400 eVee. According to the 14.6 kg-day live data, we placed the limit of N= 1.75 * 10^{-40} cm^{2} at 90% confidence level on the spin-independent cross-section at WIMP mass of 7 GeV before differentiating bulk signals from the surface backgrounds.