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20 April 2024

» arxiv » 1505.0771

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Low-mass dark matter search results from full exposure of PandaX-I experiment
Xiang Xiao ; Xun Chen ; Andy Tan ; Yunhua Chen ; Xiangyi Cui ; Deqing Fang ; Changbo Fu ; Karl L. Giboni ; Haowei Gong ; Guodong Guo ; Ming He ; Xiangdong Ji ; Yonglin Ju ; Siao Lei ; Shaoli Li ; Qing Lin ; Huaxuan Liu ; Jianglai Liu ; Xiang Liu ; Wolfgang Lorenzon ; Yugang Ma ; Yajun Mao ; Kaixuan Ni ; Kirill Pushkin ; Xiangxiang Ren ; Michael Schubnell ; Manbing Shen ; Yuji Shi ; Scott Stephenson ; Hongwei Wang ; Jiming Wang ; Meng Wang ; Siguang Wang ; Xuming Wang ; Zhou Wang ; Shiyong Wu ; Mengjiao Xiao ; Pengwei Xie ; Binbin Yan ; Yinghui You ; Xionghui Zeng ; Tao Zhang ; Li Zhao ; Xiaopeng Zhou ; Zhonghua Zhu ;
Date:	4 May 2015
Abstract:	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.
Source:	arXiv, 1505.0771
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