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

被引：46

作者：

Xiao, Xiang ^{[1
,2
]}

Chen, Xun ^{[1
,2
]}

Tan, Andi ^{[9
]}

Chen, Yunhua ^{[10
]}

Cui, Xiangyi ^{[1
,2
]}

Fang, Deqing ^{[6
]}

Fu, Changbo ^{[1
,2
]}

Giboni, Karl L. ^{[1
,2
]}

Gong, Haowei ^{[1
,2
]}

Guo, Guodong ^{[1
,2
]}

He, Ming ^{[1
,2
]}

Ji, Xiangdong ^{[1
,2
,8
,9
]}

Ju, Yonglin ^{[3
]}

Lei, Siao ^{[1
,2
]}

Li, Shaoli ^{[1
,2
]}

Lin, Qing ^{[1
,2
]}

Liu, Huaxuan ^{[3
]}

Liu, Jianglai ^{[1
,2
]}

Liu, Xiang ^{[1
,2
]}

Lorenzon, Wolfgang ^{[7
]}

Ma, Yugang ^{[6
]}

Mao, Yajun ^{[8
]}

Ni, Kaixuan ^{[1
,2
]}

Pushkin, Kirill ^{[1
,2
,7
]}

Ren, Xiangxiang ^{[4
,5
]}

Schubnell, Michael ^{[7
]}

Shen, Manbin ^{[10
]}

Shi, Yuji ^{[1
,2
]}

Stephenson, Scott ^{[7
]}

Wang, Hongwei ^{[6
]}

Wang, Jiming ^{[10
]}

Wang, Meng ^{[4
,5
]}

Wang, Siguang ^{[8
]}

Wang, Xuming ^{[1
,2
]}

Wang, Zhou ^{[3
]}

Wu, Shiyong ^{[10
]}

Xiao, Mengjiao ^{[1
,2
]}

Xie, Pengwei ^{[1
,2
]}

Yan, Binbin ^{[4
,5
]}

You, Yinghui ^{[10
]}

Zeng, Xionghui ^{[10
]}

Zhang, Tao ^{[1
,2
]}

Zhao, Li ^{[1
,2
]}

Zhou, Xiaopeng ^{[8
]}

Zhu, Zhonghua ^{[10
]}

机构：

[1] Shanghai Jiao Tong Univ, Shanghai Lab Particle Phys & Cosmol, INPAC, Shanghai 200240, Peoples R China

[2] Shanghai Jiao Tong Univ, Shanghai Lab Particle Phys & Cosmol, Dept Phys & Astron, Shanghai 200240, Peoples R China

[3] Shanghai Jiao Tong Univ, Sch Mech Engn, Shanghai 200240, Peoples R China

[4] Shandong Univ, Sch Phys, Jinan 250100, Peoples R China

[5] Shandong Univ, Key Lab Particle Phys & Particle Irradiat MOE, Jinan 250100, Peoples R China

[6] Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai 201800, Peoples R China

[7] Univ Michigan, Dept Phys, Ann Arbor, MI 48109 USA

[8] Peking Univ, Sch Phys, Beijing 100080, Peoples R China

[9] Univ Maryland, Dept Phys, College Pk, MD 20742 USA

[10] Yalong River Hydropower Dev Co Ltd, Chengdu 610051, Peoples R China

来源：

PHYSICAL REVIEW D | 2015年 / 92卷 / 05期

基金：

中国博士后科学基金; 美国国家科学基金会;

关键词：

D O I：

10.1103/PhysRevD.92.052004

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

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 events were found above the expected background. A profile likelihood ratio 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 a low-mass WIMP is set at a WIMP mass below 10 GeV=c(2), demonstrating that liquid xenon detectors can be competitive for low-mass WIMP searches.

引用

页数：14

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