First dark matter search results from the PandaX-Ⅰ experiment

• Published in: Science China. Physics, mechanics & astronomy Vol. 57; no. 11; pp. 2024 - 2030
• Main Authors: Xiao, MengJiao, Xiao, Xiang, Zhao, Li, Cao, XiGuang, Chen, Xun, Chen, YunHua, Cui, XiangYi, Fang, DeQing, Fu, ChangBo, Giboni, Karl L., Gong, HaoWei, Guo, GuoDong, Hu, Jie, Huang, XingTao, Ji, XiangDong, Ju, YongLin, Lei, SiAo, Li, ShaoLi, Lin, Qing, Liu, HuaXuan, Liu, JiangLai, Liu, Xiang, Lorenzon, Wolfgang, Ma, YuGang, Mao, YaJun, Ni, KaiXuan, Pushkin, Kirill, Ren, XiangXiang, Schubnell, Michael, Shen, ManBing, Stephenson, Scott, Tan, AnDi, Tarlé, Greg, Wang, HongWei, Wang, JiMin, Wang, Meng, Wang, XuMing, Wang, Zhou, Wei, YueHuan, Wu, ShiYong, Xie, PengWei, You, YingHui, Zeng, XiongHui, Zhang, Hua, Zhang, Tao, Zhu, ZhongHua
• Format: Journal Article
• Language: English
• Published: Heidelberg Science China Press 01-11-2014; Springer Nature B.V
• Subjects: Astronomy; China; Classical and Continuum Physics; Confidence intervals; Dark matter; Letter; Liquids; Observations and Techniques; Particle mass; Particle spin; Physics; Physics and Astronomy; Scattering cross sections; Searching; Xenon; 低质量; 实验室工作; 搜索结果; 散射截面; 暗物质; 氙气; 置信水平; China, People's Rep; direct detection; xenon; dark matter
• ISSN: 1674-7348; 1869-1927
• DOI: 10.1007/s11433-014-5598-7

We report on the first dark-matter（DM）search results from PandaX-I,a low threshold dual-phase xenon experiment operating at the China JinPing Underground Laboratory.In the 37-kg liquid xenon target with 17.4 live-days of exposure,no DM particle candidate event was found.This result sets a stringent limit for low-mass DM particles and disfavors the interpretation of previously-reported positive experimental results.The minimum upper limit,3.7×10-44cm2,for the spin-independent isoscalar DM-particle-nucleon scattering cross section is obtained at a DM-particle mass of 49 GeV/c2at 90%confidence level.