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arXiv · 1611.06553

Spin-Dependent Weakly-Interacting-Massive-Particle--Nucleon Cross Section Limits from First Data of PandaX-II Experiment

Changbo Fu·Xiangyi Cui·Xiaopeng Zhou·Xun Chen·Yunhua Chen·Deqing Fang·Karl Giboni·Franco Giuliani·Ke Han·Xingtao Huang·Xiangdong Ji·Yonglin Ju·Siao Lei·Shaoli Li·Huaxuan Liu·Jianglai Liu·Yugang Ma·Yajun Mao·Xiangxiang Ren·Andi Tan·Hongwei Wang·Jiming Wang·Meng Wang·Qiuhong Wang·Siguang Wang·Xuming Wang·Zhou Wang·Shiyong Wu·Mengjiao Xiao·Pengwei Xie·Binbin Yan·Yong Yang·Jianfeng Yue·Hongguang Zhang·Tao Zhang·Li Zhao·Ning Zhou
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Abstract

New constraints are presented on the spin-dependent WIMP-nucleon interaction from the PandaX-II experiment, using a data set corresponding to a total exposure of 3.3$\times10^4$ kg-days. Assuming a standard axial-vector spin-dependent WIMP interaction with $^{129}$Xe and $^{131}$Xe nuclei, the most stringent upper limits on WIMP-neutron cross sections for WIMPs with masses above 10 GeV/c$^{2}$ are set in all dark matter direct detection experiments. The minimum upper limit of $4.1\times 10^{-41}$ cm$^2$ at 90\% confidence level is obtained for a WIMP mass of 40 GeV/c$^{2}$. This represents more than a factor of two improvement on the best available limits at this and higher masses. These improved cross-section limits provide more stringent constraints on the effective WIMP-proton and WIMP-neutron couplings.

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Changbo Fu, Xiangyi Cui, Xiaopeng Zhou, Xun Chen, Yunhua Chen, Deqing Fang, Karl Giboni, Franco Giuliani, Ke Han, Xingtao Huang, Xiangdong Ji, Yonglin Ju, Siao Lei, Shaoli Li, Huaxuan Liu, Jianglai Liu, Yugang Ma, Yajun Mao, Xiangxiang Ren, Andi Tan, Hongwei Wang, Jiming Wang, Meng Wang, Qiuhong Wang, Siguang Wang, Xuming Wang, Zhou Wang, Shiyong Wu, Mengjiao Xiao, Pengwei Xie, Binbin Yan, Yong Yang, Jianfeng Yue, Hongguang Zhang, Tao Zhang, Li Zhao, Ning Zhou. 2017-02-15. Spin-Dependent Weakly-Interacting-Massive-Particle--Nucleon Cross Section Limits from First Data of PandaX-II Experiment. https://doi.org/10.1103/physrevlett.118.071301

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