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, 3.7×10−44\,cm2, for the spin-independent isoscalar DM-particle-nucleon scattering cross section is obtained at a DM-particle mass of 49\,GeV/c2 at 90\% confidence level.
@article{arxiv.1408.5114,
title = {First dark matter search results from the PandaX-I experiment},
author = {PandaX Collaboration and Mengjiao Xiao and Xiang Xiao and Li Zhao and Xiguang Cao and Xun Chen and Yunhua Chen and Xiangyi Cui and Deqing Fang and Changbo Fu and Karl L. Giboni and Haowei Gong and Guodong Guo and Jie Hu and Xingtao Huang and Xiangdong Ji and Yonglin Ju and Siao Lei and Shaoli Li and Qing Lin and Huaxuan Liu and Jianglai Liu and Xiang Liu and Wolfgang Lorenzon and Yugang Ma and Yajun Mao and Kaixuan Ni and Kirill Pushkin and Xiangxiang Ren and Michael Schubnell and Manbing Shen and Scott Stephenson and Andi Tan and Greg Tarle and Hongwei Wang and Jimin Wang and Meng Wang and Xuming Wang and Zhou Wang and Yuehuan Wei and Shiyong Wu and Pengwei Xie and Yinghui You and Xionghui Zeng and Hua Zhang and Tao Zhang and Zhonghua Zhu},
journal= {arXiv preprint arXiv:1408.5114},
year = {2014}
}
Comments
7 pages, 6 figures, final version as appeared in the journal publication