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

  • Author(s): Xia, J
  • Abdukerim, A
  • Chen, W
  • Chen, X
  • Chen, Y
  • Cui, X
  • Fang, D
  • Fu, C
  • Giboni, K
  • Giuliani, F
  • Gu, L
  • Guo, X
  • Guo, Z
  • Han, K
  • He, C
  • He, S
  • Huang, D
  • Huang, X
  • Huang, Z
  • Ji, P
  • Ji, X
  • Ju, Y
  • Li, S
  • Lin, H
  • Liu, H
  • Liu, J
  • Ma, Y
  • Mao, Y
  • Ni, K
  • Ning, J
  • Ren, X
  • Shi, F
  • Tan, A
  • Wang, A
  • Wang, C
  • Wang, H
  • Wang, M
  • Wang, Q
  • Wang, S
  • Wang, X
  • Wang, X
  • Wang, Z
  • Wu, M
  • Wu, S
  • Xiao, M
  • Xie, P
  • Yan, B
  • Yang, J
  • Yang, Y
  • Yu, C
  • Yuan, J
  • Yue, J
  • Zhang, D
  • Zhang, H
  • Zhang, T
  • Zhao, L
  • Zheng, Q
  • Zhou, J
  • Zhou, N
  • Zhou, X
  • Haxton, WC
  • et al.

© 2019 The Author(s) 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 1.6×10 −41 cm 2 and 9.0×10 −42 cm 2 (90% c.l.) for neutron-only SD and tensor coupling, respectively, for a mass M WIMP ∼40GeV/c 2 . The SD limits are the best currently available for M WIMP >40GeV/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.

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