期刊
PHYSICS LETTERS B
卷 792, 期 -, 页码 193-198出版社
ELSEVIER
DOI: 10.1016/j.physletb.2019.02.043
关键词
PandaX-II experiment; WIMP dark matter; Spin-dependent effective interactions
资金
- 985-III grant from Shanghai Jiao Tong University
- National Science Foundation of China [11435008, 11455001, 11505112, 11525522, 11775141, 11755001]
- Ministry of Science and Technology of China [2016YFA0400301, 2016YFA0500301]
- Office of Science and Technology, Shanghai Municipal Government [11DZ2260700, 16DZ2260200, 18JC1410200]
- Key Laboratory for Particle Physics, Astrophysics and Cosmology, Ministry of Education
- Chinese Academy of Sciences Center for Excellence in Particle Physics (CCEPP)
- Hongwen Foundation in Hong Kong
- US Department of Energy [DE-SC00046548, DE-AC02-05CH11231]
- National Science Foundation [PHY-1630782]
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 x 10(-41)cm(2) and 9.0 x 10(-42)cm(2) (90% c.l.) for neutron-only SD and tensor coupling, respectively, for a mass M-WIMP similar to 40 GeV/c(2). The SD limits are the best currently available for M-WIMP > 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. (C) 2019 The Author(s). Published by Elsevier B.V.
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