Journal
PHYSICAL REVIEW LETTERS
Volume 117, Issue 12, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.117.121303
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Funding
- 985-III grant from Shanghai Jiao Tong University
- National Science Foundation of China [11435008, 11455001, 11505112, 11525522]
- Ministry of Science and Technology of China [2016YFA0400301]
- Office of Science and Technology in Shanghai Municipal Government [11DZ2260700]
- Chinese Academy of Sciences Center for Excellence in Particle Physics (CCEPP)
- Shandong University
- Peking University
- University of Maryland
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We report the weakly interacting massive particle (WIMP) dark matter search results using the first physics-run data of the PandaX-II 500 kg liquid xenon dual-phase time-projection chamber, operating at the China JinPing underground laboratory. No dark matter candidate is identified above background. In combination with the data set during the commissioning run, with a total exposure of 3.3 x 10(4) kg day, the most stringent limit to the spin-independent interaction between the ordinary and WIMP dark matter is set for a range of dark matter mass between 5 and 1000 GeV/c(2). The best upper limit on the scattering cross section is found 2.5 x 10(-46) cm(2) for the WIMP mass 40 GeV/c(2) at 90% confidence level.
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