暗物质探测已成为当今科学最重要的课题之一。弱相互作用重粒子(weakly interacting massive particles,WIMPs)是众多理论模型中最有可能的暗物质候选者之一。暗物质直接探测原理是:WIMPs与地面探测器的靶核通过弱相互作用,发生弹性散射,反冲核被弹出,探测器将反冲核能量记录下来,得到暗物质与探测器相互作用的信号。文章介绍了国际上主流的暗物质直接探测的方法、现状以及未来直接探测的路线。还介绍了世界最深地下实验室——中国锦屏地下实验室的现状和二期扩建情况。文章最后详细介绍了中国暗物质合作组的研究历程、探测技术、研究取得的成果和未来规划。
The nature of dark matter in our universe is one of the most challenging prob- lems in science today. A most probable class of dark matter is the weakly interacting massive parti- cles (WIMPs), which exhibit a wide range of features. Current experiments searching for dark matter aim for direct detection via the elastic scattering off ordinary matter in terrestrial detectors. This paper will present the main methods, status and roadmap for the direct detection of dark mat- ter. The world's deepest laboratory, China Jinping underground laboratory and its extension, will also be described. Finally, we will give a detailed introduction to the research history, detection technologies, current results, and future prospects of China dark matter experiment (CDEX).