Dark Matter Results from First 98.7 Days of Data from the PandaX-II Experiment.
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 3.3×10^{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 2.5×10^{-46}  cm^{2} for the WIMP mass 40  GeV/c^{2} at 90% confidence level.
Department of Physics, University of Maryland, College Park, Maryland 20742, USA.
Andi
A
Tan
INPAC and Department of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai Laboratory for Particle Physics and Cosmology, Shanghai 200240, China.|Department of Physics, University of Maryland, College Park, Maryland 20742, USA.
Mengjiao
M
Xiao
INPAC and Department of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai Laboratory for Particle Physics and Cosmology, Shanghai 200240, China.
Xiangyi
X
Cui
INPAC and Department of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai Laboratory for Particle Physics and Cosmology, Shanghai 200240, China.
Xun
X
Chen
Yalong River Hydropower Development Company, Ltd., 288 Shuanglin Road, Chengdu 610051, China.
Yunhua
Y
Chen
Shanghai Institute of Applied Physics, Chinese Academy of Sciences, 201800, Shanghai, China.
Deqing
D
Fang
INPAC and Department of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai Laboratory for Particle Physics and Cosmology, Shanghai 200240, China.
Changbo
C
Fu
INPAC and Department of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai Laboratory for Particle Physics and Cosmology, Shanghai 200240, China.
Karl
K
Giboni
INPAC and Department of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai Laboratory for Particle Physics and Cosmology, Shanghai 200240, China.
Franco
F
Giuliani
INPAC and Department of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai Laboratory for Particle Physics and Cosmology, Shanghai 200240, China.
Haowei
H
Gong
Yalong River Hydropower Development Company, Ltd., 288 Shuanglin Road, Chengdu 610051, China.
Xuyuan
X
Guo
INPAC and Department of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai Laboratory for Particle Physics and Cosmology, Shanghai 200240, China.
Ke
K
Han
Key Laboratory of Nuclear Data, China Institute of Atomic Energy, Beijing 102413, China.
Shouyang
S
Hu
School of Physics and Key Laboratory of Particle Physics and Particle Irradiation (MOE), Shandong University, Jinan 250100, China.
Xingtao
X
Huang
INPAC and Department of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai Laboratory for Particle Physics and Cosmology, Shanghai 200240, China.|Department of Physics, University of Maryland, College Park, Maryland 20742, USA.|Center of High Energy Physics, Peking University, Beijing 100871, China.
Xiangdong
X
Ji
School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China.
Yonglin
Y
Ju
INPAC and Department of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai Laboratory for Particle Physics and Cosmology, Shanghai 200240, China.
Siao
S
Lei
INPAC and Department of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai Laboratory for Particle Physics and Cosmology, Shanghai 200240, China.
Shaoli
S
Li
Key Laboratory of Nuclear Data, China Institute of Atomic Energy, Beijing 102413, China.
Xiaomei
X
Li
Key Laboratory of Nuclear Data, China Institute of Atomic Energy, Beijing 102413, China.
Xinglong
X
Li
Key Laboratory of Nuclear Data, China Institute of Atomic Energy, Beijing 102413, China.
Hao
H
Liang
INPAC and Department of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai Laboratory for Particle Physics and Cosmology, Shanghai 200240, China.
Qing
Q
Lin
School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China.
Huaxuan
H
Liu
INPAC and Department of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai Laboratory for Particle Physics and Cosmology, Shanghai 200240, China.
Jianglai
J
Liu
Department of Physics, University of Michigan, Ann Arbor, Michigan, 48109, USA.
Wolfgang
W
Lorenzon
Shanghai Institute of Applied Physics, Chinese Academy of Sciences, 201800, Shanghai, China.
Yugang
Y
Ma
School of Physics, Peking University, Beijing 100871, China.
Yajun
Y
Mao
INPAC and Department of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai Laboratory for Particle Physics and Cosmology, Shanghai 200240, China.
Kaixuan
K
Ni
INPAC and Department of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai Laboratory for Particle Physics and Cosmology, Shanghai 200240, China.
Xiangxiang
X
Ren
Department of Physics, University of Michigan, Ann Arbor, Michigan, 48109, USA.
Michael
M
Schubnell
Yalong River Hydropower Development Company, Ltd., 288 Shuanglin Road, Chengdu 610051, China.
Manbin
M
Shen
INPAC and Department of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai Laboratory for Particle Physics and Cosmology, Shanghai 200240, China.
Fang
F
Shi
Shanghai Institute of Applied Physics, Chinese Academy of Sciences, 201800, Shanghai, China.
Hongwei
H
Wang
Yalong River Hydropower Development Company, Ltd., 288 Shuanglin Road, Chengdu 610051, China.
Jimin
J
Wang
School of Physics and Key Laboratory of Particle Physics and Particle Irradiation (MOE), Shandong University, Jinan 250100, China.
Meng
M
Wang
Shanghai Institute of Applied Physics, Chinese Academy of Sciences, 201800, Shanghai, China.
Qiuhong
Q
Wang
School of Physics, Peking University, Beijing 100871, China.
Siguang
S
Wang
INPAC and Department of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai Laboratory for Particle Physics and Cosmology, Shanghai 200240, China.
Xuming
X
Wang
School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China.
Zhou
Z
Wang
Yalong River Hydropower Development Company, Ltd., 288 Shuanglin Road, Chengdu 610051, China.
Shiyong
S
Wu
INPAC and Department of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai Laboratory for Particle Physics and Cosmology, Shanghai 200240, China.
Xiang
X
Xiao
INPAC and Department of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai Laboratory for Particle Physics and Cosmology, Shanghai 200240, China.
Pengwei
P
Xie
School of Physics and Key Laboratory of Particle Physics and Particle Irradiation (MOE), Shandong University, Jinan 250100, China.
Binbin
B
Yan
INPAC and Department of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai Laboratory for Particle Physics and Cosmology, Shanghai 200240, China.
Yong
Y
Yang
Yalong River Hydropower Development Company, Ltd., 288 Shuanglin Road, Chengdu 610051, China.
Jianfeng
J
Yue
Yalong River Hydropower Development Company, Ltd., 288 Shuanglin Road, Chengdu 610051, China.
Xionghui
X
Zeng
INPAC and Department of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai Laboratory for Particle Physics and Cosmology, Shanghai 200240, China.
Hongguang
H
Zhang
School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China.
Hua
H
Zhang
Key Laboratory of Nuclear Data, China Institute of Atomic Energy, Beijing 102413, China.
Huanqiao
H
Zhang
INPAC and Department of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai Laboratory for Particle Physics and Cosmology, Shanghai 200240, China.
Tao
T
Zhang
INPAC and Department of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai Laboratory for Particle Physics and Cosmology, Shanghai 200240, China.
Li
L
Zhao
Key Laboratory of Nuclear Data, China Institute of Atomic Energy, Beijing 102413, China.
Jing
J
Zhou
INPAC and Department of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai Laboratory for Particle Physics and Cosmology, Shanghai 200240, China.|Department of Physics, Tsinghua University, Beijing 100084, China.
Ning
N
Zhou
School of Physics, Peking University, Beijing 100871, China.
Xiaopeng
X
Zhou