Journal
PHYSICAL REVIEW LETTERS
Volume 121, Issue 2, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.121.021304
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Funding
- Shanghai Jiao Tong University [985-III]
- National Science Foundation of China [11435008, 11505112, 11525522, 11755001]
- Ministry of Science and Technology of China [2016YFA0400301]
- 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)
- U.S. Department of Energy [de-sc0008541]
- Hongwen Foundation in Hong Kong
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We search for nuclear recoil signals of dark matter models with a light mediator in PandaX-II, a direct detection experiment in the China Jinping underground laboratory. Using data collected in 2016 and 2017 runs, corresponding to a total exposure of 54 ton day, we set upper limits on the zero-momentum dark matter-nucleon cross section. These limits have a strong dependence on the mediator mass when it is comparable to or below the typical momentum transfer. We apply our results to constrain self-interacting dark matter models with a light mediator mixing with standard model particles, and set strong limits on the model parameter space for the dark matter mass ranging from 5 GeV to 10 TeV.
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