First dark matter search results from the PandaX-Ⅰ experiment

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...

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Veröffentlicht in:	Science China. Physics, mechanics & astronomy mechanics & astronomy, 2014-11, Vol.57 (11), p.2024-2030
Hauptverfasser:	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:	Artikel
Sprache:	eng
Schlagworte:	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
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Beschreibung
Zusammenfassung:	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.
ISSN:	1674-7348 1869-1927
DOI:	10.1007/s11433-014-5598-7