Low-mass dark matter search results from full exposure of PandaX-I experiment

• Published in: arXiv.org 2015-08
• Main Authors: Collaboration, PandaX, Xiao, Xiang, Chen, Xun, Tan, Andi, Chen, Yunhua, Cui, Xiangyi, Fang, Deqing, Fu, Changbo, Giboni, Karl L, Gong, Haowei, Guo, Guodong, He, Ming, Ji, Xiangdong, Ju, Yonglin, Siao Lei, Li, Shaoli, Lin, Qing, Liu, Huaxuan, Liu, Jianglai, Liu, Xiang, Lorenzon, Wolfgang, Ma, Yugang, Mao, Yajun, Ni, Kaixuan, Pushkin, Kirill, Ren, Xiangxiang, Schubnell, Michael, Shen, Manbin, Shi, Yuji, Stephenson, Scott, Wang, Hongwei, Wang, Jiming, Wang, Meng, Wang, Siguang, Wang, Xuming, Wang, Zhou, Wu, Shiyong, Xiao, Mengjiao, Xie, Pengwei, Yan, Binbin, You, Yinghui, Zeng, Xionghui, Zhang, Tao, Zhao, Li, Zhou, Xiaopeng, Zhu, Zhonghua
• Format: Article
• Language: English
• Subjects: Dark matter; Weakly interacting massive particles; Xenon
• ISSN: 2331-8422
• DOI: 10.48550/arxiv.1505.00771

We report the results of a weakly-interacting massive particle (WIMP) dark matter search using the full 80.1\;live-day exposure of the first stage of the PandaX experiment (PandaX-I) located in the China Jin-Ping Underground Laboratory. The PandaX-I detector has been optimized for detecting low-mass WIMPs, achieving a photon detection efficiency of 9.6\%. With a fiducial liquid xenon target mass of 54.0\,kg, no significant excess event were found above the expected background. A profile likelihood analysis confirms our earlier finding that the PandaX-I data disfavor all positive low-mass WIMP signals reported in the literature under standard assumptions. A stringent bound on the low mass WIMP is set at WIMP mass below 10\,GeV/c\(^2\), demonstrating that liquid xenon detectors can be competitive for low-mass WIMP searches.