First dark matter search results from the PandaX-I experiment
PandaX Collaboration: Mengjiao Xiao, Xiang Xiao, Li Zhao, Xiguang Cao,, Xun Chen, Yunhua Chen, Xiangyi Cui, Deqing Fang, Changbo Fu, Karl L. Giboni,, Haowei Gong, Guodong Guo, Jie Hu, Xingtao Huang, Xiangdong Ji, Yonglin Ju,, Siao Lei, Shaoli Li, Qing Lin, Huaxuan Liu
TL;DR
The PandaX-I experiment conducted its first search for dark matter particles using a 37-kg liquid xenon detector, setting new limits on low-mass dark matter interactions and challenging previous positive detection claims.
Contribution
This paper presents the first dark matter search results from PandaX-I, providing new upper limits on dark matter particle interactions with nucleons.
Findings
No dark matter candidate events detected
Set a minimum upper limit of 3.7×10⁻⁴⁴ cm² at 49 GeV/c²
Disfavors previous positive dark matter detection results
Abstract
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, \,cm, for the spin-independent isoscalar DM-particle-nucleon scattering cross section is obtained at a DM-particle mass of 49\,GeV/c at 90\% confidence level.
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