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PandaX-II constraints on spin-dependent WIMP-nucleon effective interactions

2019; Elsevier BV; Volume: 792; Linguagem: Inglês

10.1016/j.physletb.2019.02.043

1873-2445

Jingkai Xia, Abdusalam Abdukerim, Wei Chen, Xun Chen, Yunhua Chen, Xiangyi Cui, Deqing Fang, Changbo Fu, Karl Giboni, Franco Giuliani, Linhui Gu, Xuyuan Guo, Zhifan Guo, K. Han, Changda He, Shengming He, Di Huang, Xingtao Huang, Zhou Huang, Peng Ji, Xiangdong Ji, Yonglin Ju, Shaoli Li, Heng Lin, Huaxuan Liu, Jianglai Liu, Y. G., Yajun Mao, Kaixiang Ni, Jinhua Ning, Xiangxiang Ren, Fang Shi, Andi Tan, Anqing Wang, Cheng Wang, Hongwei Wang, Meng Wang, Qiuhong Wang, Siguang Wang, Xiuli Wang, Xu‐Ming Wang, Zhou Wang, Mengmeng Wu, Shiyong Wu, Mengjiao Xiao, Pengwei Xie, Binbin Yan, Jijun Yang, Yong Yang, Chunxu Yu, Jumin Yuan, Jianfeng Yue, Dan Zhang, Hongguang Zhang, Tao Zhang, Li Zhao, Qibin Zheng, Jifang Zhou, N. Zhou, Xiaopeng Zhou, W. C. Haxton,

Quantum Chromodynamics and Particle Interactions

We present PandaX-II constraints on candidate WIMP-nucleon effective interactions involving the nucleon or WIMP spin, including, in addition to standard axial spin-dependent (SD) scattering, various couplings among vector and axial currents, magnetic and electric dipole moments, and tensor interactions. The data set corresponding to a total exposure of 54-ton-days is reanalyzed to determine constraints as a function of the WIMP mass and isospin coupling. We obtain WIMP-nucleon cross section bounds of $\rm 1.6 \times 10^{-41} cm^2$ and $\rm 9.0 \times 10^{-42} cm^2$ ($90\%$ c.l.) for neutron-only SD and tensor coupling, respectively, for a mass $M_\mathrm{WIMP} \sim {\rm 40~GeV}/c^2$. The SD limits are the best currently available for $M_\mathrm{WIMP} > {\rm 40~GeV}/c^2$. We show that PandaX-II has reached a sensitivity sufficient to probe a variety of other candidate spin-dependent interactions at the weak scale.