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23 results on '"Shen, Manbin"'

1. Searching for MeV-scale Axion-like Particles and Dark Photons with PandaX-4T

Author

PandaX Collaboration, Li, Tao, Bo, Zihao, Chen, Wei, Chen, Xun, Chen, Yunhua, Cheng, Zhaokan, Cui, Xiangyi, Fan, Yingjie, Fang, Deqing, Gao, Zhixing, Geng, Lisheng, Giboni, Karl, Guo, Xunan, Guo, Xuyuan, Guo, Zichao, Han, Chencheng, He, Ke HanChangda, He, Jinrong, Huang, Di, Huang, Houqi, Huang, Junting, Hou, Ruquan, Hou, Yu, Ji, Xiangdong, Ji, Xiangpan, Ju, Yonglin, Li, Chenxiang, Li, Jiafu, Li, Mingchuan, Li, Shuaijie, Li, Zhiyuan, Lin, Qing, Liu, Jianglai, Lu, Congcong, Lu, Xiaoying, Luo, Lingyin, Luo, Yunyang, Ma, Wenbo, Ma, Yugang, Mao, Yajun, Meng, Yue, Ning, Xuyang, Pang, Binyu, Qi, Ningchun, Qian, Zhicheng, Ren, Xiangxiang, Shan, Dong, Shang, Xiaofeng, Shao, Xiyuan, Shen, Guofang, Shen, Manbin, Sun, Wenliang, Tao, Yi, Wang, Anqing, Wang, Guanbo, Wang, Hao, Wang, Jiamin, Wang, Lei, Wang, Meng, Wang, Qiuhong, Wang, Shaobo, Wang, Siguang, Wang, Wei, Wang, Xiuli, Wang, Xu, Wang, Zhou, Wei, Yuehuan, Wu, Weihao, Wu, Yuan, Xiao, Mengjiao, Xiao, Xiang, Xiong, Kaizhi, Xu, Yifan, Yao, Shunyu, Yan, Binbin, Yan, Xiyu, Yang, Yong, Ye, Peihua, Yu, Chunxu, Yuan, Ying, Yuan, Zhe, Yun, Youhui, Zeng, Xinning, Zhang, Minzhen, Zhang, Peng, Zhang, Shibo, Zhang, Shu, Zhang, Tao, Zhang, Wei, Zhang, Yang, Zhang, Yingxin, Zhang, Yuanyuan, Zhao, Li, Zhou, Jifang, Zhou, Jiaxu, Zhou, Jiayi, Zhou, Ning, Zhou, Xiaopeng, Zhou, Yubo, and Zhou, Zhizhen

Subjects
High Energy Physics - Experiment
Abstract

Axion-like particles (ALPs) and dark photons (DPs) are viable dark matter particle candidates. We have searched for possible ALP/DP signals in the PandaX-4T liquid xenon detector using 94.8 days of data. A binned likelihood fit is constructed to search for possible mono-energetic peaks induced by the absorption processes between ALPs/DPs and atomic electrons of xenon. A detailed temporal model of decays associated with xenon isotopes is introduced to constrain the number of background events. No signal excess over background expectations is observed, and we have established the most stringent exclusion limits for most ALP/DP masses ranging from 150 keV/$c^2$ to 1 MeV/$c^2$.

Published
2024

2. Exploring New Physics with PandaX-4T Low Energy Electronic Recoil Data

Author

PandaX Collaboration, Zeng, Xinning, Bo, Zihao, Chen, Wei, Chen, Xun, Chen, Yunhua, Cheng, Zhaokan, Cui, Xiangyi, Fan, Yingjie, Fang, Deqing, Gao, Zhixing, Geng, Lisheng, Giboni, Karl, Guo, Xunan, Guo, Xuyuan, Guo, Zichao, Han, Chencheng, He, Ke HanChangda, He, Jinrong, Huang, Di, Huang, Houqi, Huang, Junting, Hou, Ruquan, Hou, Yu, Ji, Xiangdong, Ji, Xiangpan, Ju, Yonglin, Li, Chenxiang, Li, Jiafu, Li, Mingchuan, Li, Shuaijie, Li, Tao, Li, Zhiyuan, Lin, Qing, Liu, Jianglai, Lu, Congcong, Lu, Xiaoying, Luo, Lingyin, Luo, Yunyang, Ma, Wenbo, Ma, Yugang, Mao, Yajun, Meng, Yue, Ning, Xuyang, Pang, Binyu, Qi, Ningchun, Qian, Zhicheng, Ren, Xiangxiang, Shan, Dong, Shang, Xiaofeng, Shao, Xiyuan, Shen, Guofang, Shen, Manbin, Sun, Wenliang, Tao, Yi, Wang, Anqing, Wang, Guanbo, Wang, Hao, Wang, Jiamin, Wang, Lei, Wang, Meng, Wang, Qiuhong, Wang, Shaobo, Wang, Siguang, Wang, Wei, Wang, Xiuli, Wang, Xu, Wang, Zhou, Wei, Yuehuan, Wu, Weihao, Wu, Yuan, Xiao, Mengjiao, Xiao, Xiang, Xiong, Kaizhi, Xu, Yifan, Yao, Shunyu, Yan, Binbin, Yan, Xiyu, Yang, Yong, Ye, Peihua, Yu, Chunxu, Yuan, Ying, Yuan, Zhe, Yun, Youhui, Zhang, Minzhen, Zhang, Peng, Zhang, Shibo, Zhang, Shu, Zhang, Tao, Zhang, Wei, Zhang, Yang, Zhang, Yingxin, Zhang, Yuanyuan, Zhao, Li, Zhou, Jifang, Zhou, Jiaxu, Zhou, Jiayi, Zhou, Ning, Zhou, Xiaopeng, Zhou, Yubo, and Zhou, Zhizhen

Subjects
High Energy Physics - Experiment
Abstract

New particles beyond the Standard Model of particle physics, such as axions, can be effectively searched through their interactions with electrons. We use the large liquid xenon detector PandaX-4T to search for novel electronic recoil signals induced by solar axions, neutrinos with anomalous magnetic moment, axion-like particles, dark photons, and light fermionic dark matter. A detailed background model is established with the latest datasets with 1.54 $\rm tonne \cdot year$ exposure. No significant excess above the background has been observed, and we have obtained competitive constraints for axion couplings, neutrino magnetic moment, and fermionic dark matter interactions.

Published
2024

3. Dark Matter Search Results from 1.54 Tonne$\cdot$Year Exposure of PandaX-4T

Author

PandaX Collaboration, Bo, Zihao, Chen, Wei, Chen, Xun, Chen, Yunhua, Cheng, Zhaokan, Cui, Xiangyi, Fan, Yingjie, Fang, Deqing, Gao, Zhixing, Geng, Lisheng, Giboni, Karl, Guo, Xunan, Guo, Xuyuan, Guo, Zichao, Han, Chencheng, Han, Ke, He, Changda, He, Jinrong, Huang, Di, Huang, Houqi, Huang, Junting, Hou, Ruquan, Hou, Yu, Ji, Xiangdong, Ji, Xiangpan, Ju, Yonglin, Li, Chenxiang, Li, Jiafu, Li, Mingchuan, Li, Shuaijie, Li, Tao, Li, Zhiyuan, Lin, Qing, Liu, Jianglai, Lu, Congcong, Lu, Xiaoying, Luo, Lingyin, Luo, Yunyang, Ma, Wenbo, Ma, Yugang, Mao, Yajun, Meng, Yue, Ning, Xuyang, Pang, Binyu, Qi, Ningchun, Qian, Zhicheng, Ren, Xiangxiang, Shan, Dong, Shang, Xiaofeng, Shao, Xiyuan, Shen, Guofang, Shen, Manbin, Sun, Wenliang, Tao, Yi, Wang, Anqing, Wang, Guanbo, Wang, Hao, Wang, Jiamin, Wang, Lei, Wang, Meng, Wang, Qiuhong, Wang, Shaobo, Wang, Siguang, Wang, Wei, Wang, Xiuli, Wang, Xu, Wang, Zhou, Wei, Yuehuan, Wu, Weihao, Wu, Yuan, Xiao, Mengjiao, Xiao, Xiang, Xiong, Kaizhi, Xu, Yifan, Yao, Shunyu, Yan, Binbin, Yan, Xiyu, Yang, Yong, Ye, Peihua, Yu, Chunxu, Yuan, Ying, Yuan, Zhe, Yun, Youhui, Zeng, Xinning, Zhang, Minzhen, Zhang, Peng, Zhang, Shibo, Zhang, Shu, Zhang, Tao, Zhang, Wei, Zhang, Yang, Zhang, Yingxin, Zhang, Yuanyuan, Zhao, Li, Zhou, Jifang, Zhou, Jiaxu, Zhou, Jiayi, Zhou, Ning, Zhou, Xiaopeng, Zhou, Yubo, and Zhou, Zhizhen

Subjects
High Energy Physics - Experiment
Abstract

In this letter, we report the dark matter search results from the commissioning run and the first science run of the PandaX-4T experiment. A blind analysis is carried out on the entire data set. The data processing is improved compared to previous work, unifying the low-level signal reconstruction in a wide energy range up to 120 keV. With a total exposure of 1.54 tonne$\cdot$year, no significant excess of nuclear recoil events is found. The lowest 90% confidence level exclusion on the spin-independent cross section is $1.6 \times 10^{-47} \mathrm{cm}^2$ at a dark matter mass of 40 GeV$/c^2$. Our results represent the most stringent constraint for a dark matter mass above 100 GeV$/c^2$.

Published
2024

4. First Indication of Solar $^8$B Neutrino Flux through Coherent Elastic Neutrino-Nucleus Scattering in PandaX-4T

Author

PandaX Collaboration, Bo, Zihao, Chen, Wei, Chen, Xun, Chen, Yunhua, Cheng, Zhaokan, Cui, Xiangyi, Fan, Yingjie, Fang, Deqing, Gao, Zhixing, Geng, Lisheng, Giboni, Karl, Guo, Xunan, Guo, Xuyuan, Guo, Zichao, Han, Chencheng, Han, Ke, He, Changda, He, Jinrong, Huang, Di, Huang, Houqi, Huang, Junting, Hou, Ruquan, Hou, Yu, Ji, Xiangdong, Ji, Xiangpan, Ju, Yonglin, Li, Chenxiang, Li, Jiafu, Li, Mingchuan, Li, Shuaijie, Li, Tao, Li, Zhiyuan, Lin, Qing, Liu, Jianglai, Lu, Congcong, Lu, Xiaoying, Luo, Lingyin, Luo, Yunyang, Ma, Wenbo, Ma, Yugang, Mao, Yajun, Meng, Yue, Ning, Xuyang, Pang, Binyu, Qi, Ningchun, Qian, Zhicheng, Ren, Xiangxiang, Shan, Dong, Shang, Xiaofeng, Shao, Xiyuan, Shen, Guofang, Shen, Manbin, Sun, Wenliang, Tao, Yi, Wang, Anqing, Wang, Guanbo, Wang, Hao, Wang, Jiamin, Wang, Lei, Wang, Meng, Wang, Qiuhong, Wang, Shaobo, Wang, Siguang, Wang, Wei, Wang, Xiuli, Wang, Xu, Wang, Zhou, Wei, Yuehuan, Wu, Weihao, Wu, Yuan, Xiao, Mengjiao, Xiao, Xiang, Xiong, Kaizhi, Xu, Yifan, Yao, Shunyu, Yan, Binbin, Yan, Xiyu, Yang, Yong, Ye, Peihua, Yu, Chunxu, Yuan, Ying, Yuan, Zhe, Yun, Youhui, Zeng, Xinning, Zhang, Minzhen, Zhang, Peng, Zhang, Shibo, Zhang, Shu, Zhang, Tao, Zhang, Wei, Zhang, Yang, Zhang, Yingxin, Zhang, Yuanyuan, Zhao, Li, Zhou, Jifang, Zhou, Jiaxu, Zhou, Jiayi, Zhou, Ning, Zhou, Xiaopeng, Zhou, Yubo, and Zhou, Zhizhen

Subjects
High Energy Physics - Experiment, Astrophysics - Solar and Stellar Astrophysics, Nuclear Experiment
Abstract

The PandaX-4T liquid xenon detector at the China Jinping Underground Laboratory is used to measure the solar $^8$B neutrino flux by detecting neutrinos through coherent scattering with xenon nuclei. Data samples requiring the coincidence of scintillation and ionization signals (paired), as well as unpaired ionization-only signals (US2), are selected with energy threshold of approximately 1.1 keV (0.33 keV) nuclear recoil energy. Combining the commissioning run and the first science run of PandaX-4T, a total exposure of 1.20 and 1.04 tonne$\cdot$year are collected for the paired and US2, respectively. After unblinding, 3 and 332 events are observed with an expectation of 2.8$\pm$0.5 and 251$\pm$32 background events, for the paired and US2 data, respectively. A combined analysis yields a best-fit $^8$B neutrino signal of 3.5 (75) events from the paired (US2) data sample, with $\sim$37\% uncertainty, and the background-only hypothesis is disfavored at 2.64$\sigma$ significance. This gives a solar $^8$B neutrino flux of ($8.4\pm3.1$)$\times$10$^6$ cm$^{-2}$s$^{-1}$, consistent with the standard solar model prediction. It is also the first indication of solar $^8$B neutrino ``fog'' in a dark matter direct detection experiment., Comment: Accepted by Physical Review Letters

Published
2024

5. Measurement of Solar $pp$ Neutrino Flux using Electron Recoil Data from PandaX-4T Commissioning Run

Author

PandaX Collaboration, Lu, Xiaoying, Abdukerim, Abdusalam, Bo, Zihao, Chen, Wei, Chen, Xun, Chen, Yunhua, Cheng, Chen, Cheng, Zhaokan, Cui, Xiangyi, Fan, Yingjie, Fang, Deqing, Geng, Lisheng, Giboni, Karl, Guo, Xuyuan, Han, Chencheng, Han, Ke, He, Changda, He, Jinrong, Huang, Di, Huang, Junting, Huang, Zhou, Hou, Ruquan, Hou, Yu, Ji, Xiangdong, Ju, Yonglin, Li, Chenxiang, Li, Jiafu, Li, Mingchuan, Li, Shuaijie, Li, Tao, Lin, Qing, Liu, Jianglai, Lu, Congcong, Luo, Lingyin, Luo, Yunyang, Ma, Wenbo, Ma, Yugang, Mao, Yajun, Meng, Yue, Ning, Xuyang, Pang, Binyu, Qi, Ningchun, Qian, Zhicheng, Ren, Xiangxiang, Shaheed, Nasir, Shang, Xiaofeng, Shao, Xiyuan, Shen, Guofang, Shen, Manbin, Si, Lin, Sun, Wenliang, Tao, Yi, Wang, Anqing, Wang, Meng, Wang, Qiuhong, Wang, Shaobo, Wang, Siguang, Wang, Wei, Wang, Xiuli, Wang, Xu, Wang, Zhou, Wei, Yuehuan, Wu, Mengmeng, Wu, Weihao, Wu, Yuan, Xiao, Mengjiao, Xiao, Xiang, Xiong, Kaizhi, Yan, Binbin, Yan, Xiyu, Yang, Yong, Yu, Chunxu, Yuan, Ying, Yuan, Zhe, Yun, Youhui, Zeng, Xinning, Zhang, Minzhen, Zhang, Peng, Zhang, Shibo, Zhang, Shu, Zhang, Tao, Zhang, Wei, Zhang, Yang, Zhang, Yingxin, Zhang, Yuanyuan, Zhao, Li, Zhou, Jifang, Zhou, Ning, Zhou, Xiaopeng, Zhou, Yubo, and Zhou, Zhizhen

Subjects
High Energy Physics - Experiment
Abstract

The proton-proton ($pp$) fusion chain dominates the neutrino production from the Sun. The uncertainty of the predicted $pp$ neutrino flux is at the sub-percent level, whereas that of the best measurement is $\mathcal{O}(10\%)$. In this paper, we present the first result to measure the solar $pp$ neutrinos in the electron recoil energy range from 24 to 144 keV, using the PandaX-4T commissioning data with 0.63 tonne$\times$year exposure. The $pp$ neutrino flux is determined to be $(8.0 \pm 3.9 \,{\rm{(stat)}} \pm 10.0 \,{\rm{(syst)}} )\times 10^{10}\, $$\rm{s}^{-1} \rm{cm}^{-2}$, consistent with Standard Solar Model and existing measurements, corresponding to a flux upper limit of $23.3\times 10^{10}\, $$\rm{s}^{-1} \rm{cm}^{-2}$ at 90\% C.L.., Comment: 6 pages, 5 figures

Published
2024

6. The first result on 76Ge neutrinoless double beta decay from CDEX-1 experiment

Author

Wang, Li, Yue, Qian, Kang, KeJun, Cheng, JianPing, Li, YuanJing, Wong, TszKing Henry, Lin, ShinTed, Chang, JianPing, Chen, JingHan, Chen, QingHao, Chen, YunHua, Deng, Zhi, Du, Qiang, Gong, Hui, He, Li, He, QingJu, Hu, JinWei, Huang, HanXiong, Huang, TengRui, Jia, LiPing, Jiang, Hao, Li, HauBin, Li, Hong, Li, JianMin, Li, Jin, Li, Jun, Li, Xia, Li, XinYing, Li, XueQian, Li, YuLan, Lin, FongKay, Liu, ShuKui, Ma, Hao, Ma, JingLu, Pan, XingYu, Ren, Jie, Ruan, XiChao, Shen, ManBin, Sharma, Vivek, Singh, Lakhwinder, Singh, Manoj Kumar, Soma, Arun Kumar, Su, Jian, Tang, ChangJian, Tang, WeiYou, Tseng, ChaoHsiung, Wang, JiMin, Wang, Qing, Wu, ShiYong, Wu, Wei, Wu, YuCheng, Xing, HaoYang, Xu, Yin, Xue, Tao, Yang, LiTao, Yang, SongWei, Yi, Nan, Yu, ChunXu, Yu, HaiJun, Zeng, WeiHe, Zeng, XiongHui, Zeng, Zhi, Zhang, Lan, Zhang, YunHua, Zhao, MingGang, Zhao, Wei, Zhong, SuNing, Zhou, JiFang, Zhou, ZuYing, Zhu, JingJun, Zhu, WeiBin, and Zhu, ZhongHua

Subjects
High Energy Physics - Experiment, Nuclear Experiment, Physics - Instrumentation and Detectors
Abstract

We report the first result on Ge-76 neutrinoless double beta decay from CDEX-1 experiment at China Jinping Underground Laboratory. A mass of 994 g p-type point-contact high purity germanium detector has been installed to search the neutrinoless double beta decay events, as well as to directly detect dark matter particles. An exposure of 304 kg*day has been analyzed. The wideband spectrum from 500 keV to 3 MeV was obtained and the average event rate at the 2.039 MeV energy range is about 0.012 count per keV per kg per day. The half-life of Ge-76 neutrinoless double beta decay has been derived based on this result as: T 1/2 > 6.4*10^22 yr (90% C.L.). An upper limit on the effective Majorana-neutrino mass of 5.0 eV has been achieved. The possible methods to further decrease the background level have been discussed and will be pursued in the next stage of CDEX experiment., Comment: 8 pages, 8 figures

Published
2017
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7. Neutron background measurements at China Jinping underground laboratory with a Bonner Multi-sphere Spectrometer

Author

Hu, Qingdong, Ma, Hao, Zeng, Zhi, Cheng, Jianping, Chen, Yunhua, He, Shenming, Li, Junli, Shen, Manbin, Wu, Shiyong, Yue, Qian, Yue, Jianfeng, and Zhang, Hui

Subjects
Physics - Instrumentation and Detectors, High Energy Physics - Experiment, Nuclear Experiment
Abstract

The neutron background spectrum from thermal neutron to 20 MeV fast neutron was measured at the first experimental hall of China Jinping underground laboratory with a Bonner multi-sphere spectrometer. The measurement system was validated by a Cf252 source and inconformity was corrected. Due to micro charge discharge, the dataset was screened and background from the steel of the detectors was estimated by MC simulation. Based on genetic algorithm we obtained the energy distribution of the neutron and the total flux of neutron was (2.69 +/-1.02) *10^-5 cm^-2s^-1, Comment: 10 pages,6 Figures, 3 Tables

Published
2016
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8. Dark Matter Results from First 98.7-day Data of PandaX-II Experiment

Author

Collaboration, PandaX-II, Tan, Andi, Xiao, Mengjiao, Cui, Xiangyi, Chen, Xun, Chen, Yunhua, Fang, Deqing, Fu, Changbo, Giboni, Karl, Giuliani, Franco, Gong, Haowei, Hu, Shouyang, Huang, Xingtao, Ji, Xiangdong, Ju, Yonglin, Lei, Siao, Li, Shaoli, Li, Xiaomei, Li, Xinglong, Liang, Hao, Lin, Qing, Liu, Huaxuan, Liu, Jianglai, Lorenzon, Wolfgang, Ma, Yugang, Mao, Yajun, Ni, Kaixuan, Ren, Xiangxiang, Schubnell, Michael, Shen, Manbin, Shi, Fang, Wang, Hongwei, Wang, Jiming, Wang, Meng, Wang, Qiuhong, Wang, Siguang, Wang, Xuming, Wang, Zhou, Wu, Shiyong, Xiao, Xiang, Xie, Pengwei, Yan, Binbin, Yang, Yong, Yue, Jianfeng, Zeng, Xionghui, Zhang, Hongguang, Zhang, Hua, Zhang, Huanqiao, Zhang, Tao, Zhao, Li, Zhou, Jing, Zhou, Ning, and Zhou, Xiaopeng

Subjects
High Energy Physics - Experiment, Physics - Instrumentation and Detectors
Abstract

We report the 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$\times10^4$ 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 3.5 and 1000 GeV/c$^2$. The best upper limit on the scattering cross section is found $2.5\times 10^{-46}$ cm$^2$ for the WIMP mass 40 GeV/c$^2$ at 90% confidence level., Comment: version accepted by PRL, 12 pages, 5+11 figures (including supplementary materials), 4 tables

Published
2016
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9. Dark Matter Search Results from the Commissioning Run of PandaX-II

Author

PandaX Collaboration, Tan, Andi, Xiao, Xiang, Cui, Xiangyi, Chen, Xun, Chen, Yunhua, Fang, Deqing, Fu, Changbo, Giboni, Karl, Giuliani, Franco, Gong, Haowei, Hu, Shouyang, Huang, Xingtao, Ji, Xiangdong, Ju, Yonglin, Lei, Siao, Li, Shaoli, Li, Xiaomei, Li, Xinglong, Liang, Hao, Lin, Qing, Liu, Huaxuan, Liu, Jianglai, Lorenzon, Wolfgang, Ma, Yugang, Mao, Yajun, Ni, Kaixuan, Pushkin, Kirill, Ren, Xiangxiang, Schubnell, Michael, Shen, Manbin, Shi, Fang, Stephenson, Scott, Wang, Hongwei, Wang, Jiming, Wang, Meng, Wang, Qiuhong, Wang, Siguang, Wang, Xuming, Wang, Zhou, Wu, Shiyong, Xiao, Mengjiao, Xie, Pengwei, Yan, Binbin, Yang, Yong, Yue, Jianfeng, Zeng, Xionghui, Zhang, Hongguang, Zhang, Hua, Zhang, Huanqiao, Zhang, Tao, Zhao, Li, Zhou, Jing, and Zhou, Xiaopeng

Subjects
High Energy Physics - Experiment, Physics - Instrumentation and Detectors
Abstract

We present the results of a search for WIMPs from the commissioning run of the PandaX-II experiment located at the China Jinping underground Laboratory. A WIMP search data set with an exposure of 306$\times$19.1 kg-day was taken, while its dominant $^{85}$Kr background was used as the electron recoil calibration. No WIMP candidates are identified, and a 90\% upper limit is set on the spin-independent elastic WIMP-nucleon cross section with a lowest excluded cross section of 2.97$\times$10$^{-45}$~cm$^2$ at a WIMP mass of 44.7~GeV/c$^2$., Comment: 7 pages, 6 figures, v2 as accepted by PRD

Published
2016
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10. Low-mass dark matter search results from full exposure of PandaX-I experiment

Author

PandaX Collaboration, 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, Lei, Siao, 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, and Zhu, Zhonghua

Subjects
High Energy Physics - Experiment, Astrophysics - Instrumentation and Methods for Astrophysics, Physics - Instrumentation and Detectors
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., Comment: v3 as accepted by PRD. Minor update in the text in response to referee comments. Separating Fig. 11(a) and (b) into Fig. 11 and Fig. 12. Legend tweak in Fig. 9(b) and 9(c) as suggested by referee, as well as a missing legend for CRESST-II legend in Fig. 12 (now Fig. 13). Same version as submitted to PRD

Published
2015
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12. First results on 76Ge neutrinoless double beta decay from CDEX-1 experiment

Author

Wang, Li, Yue, Qian, Kang, KeJun, Cheng, JianPing, Li, YuanJing, Wong, TszKing Henry, Lin, ShinTed, Chang, JianPing, Chen, JingHan, Chen, QingHao, Chen, YunHua, Deng, Zhi, Du, Qiang, Gong, Hui, He, Li, He, QingJu, Hu, JinWei, Huang, HanXiong, Huang, TengRui, Jia, LiPing, Jiang, Hao, Li, HauBin, Li, Hong, Li, JianMin, Li, Jin, Li, Jun, Li, Xia, Li, XueQian, Li, YuLan, Lin, FongKay, Liu, ShuKui, Ma, Hao, Ma, JingLu, Pan, XingYu, Ren, Jie, Ruan, XiChao, Shen, ManBin, Sharma, Vivek, Singh, Lakhwinder, Singh, Manoj Kumar, Singh, Manoj Kumar, Soma, Arun Kumar, Tang, ChangJian, Tang, WeiYou, Tseng, ChaoHsiung, Wang, JiMin, Wang, Qing, Wu, ShiYong, Wu, YuCheng, Xing, HaoYang, Xu, Yin, Xue, Tao, Yang, LiTao, Yang, SongWei, Yi, Nan, Yu, ChunXu, Yu, HaiJun, Zeng, WeiHe, Zeng, XiongHui, Zeng, Zhi, Zhang, Lan, Zhang, YunHua, Zhao, MingGang, Zhao, Wei, Zhou, JiFang, Zhou, ZuYing, Zhu, JingJun, Zhu, WeiBin, Zhu, ZhongHua, and CDEX Collaboration

Published
2017
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13. Performances of a prototype point-contact germanium detector immersed in liquid nitrogen for light dark matter search

Author

Jiang, Hao, Yang, LiTao, Yue, Qian, Kang, KeJun, Cheng, JianPing, Li, YuanJing, Wong, Henry Tsz-King, Ağartioğlu, M., An, HaiPeng, Chang, JianPing, Chen, JingHan, Chen, YunHua, Deng, Zhi, Du, Qiang, Gong, Hui, He, Li, Hu, JinWei, Hu, QingDong, Huang, HanXiong, Jia, LiPing, Li, HauBin, Li, Hong, Li, JianMin, Li, Jin, Li, Xia, Li, XueQian, Li, YuLan, Liao, Bin, Lin, FongKay, Lin, ShinTed, Liu, ShuKui, Liu, YanDong, Liu, YuanYuan, Liu, ZhongZhi, Ma, Hao, Ma, JingLu, Pan, Hui, Ren, Jie, Ruan, XiChao, Sevda, B., Sharma, Vivek, Shen, ManBin, Singh, Lakhwinder, Singh, Monoj Kumar, Sun, TianXi, Tang, ChangJian, Tang, WeiYou, Tian, Yang, Wang, GuangFu, Wang, JiMin, Wang, Li, Wang, Qing, Wang, Yi, Wu, ShiYong, Wu, YuCheng, Xing, HaoYang, Xu, Yin, Xue, Tao, Yang, SongWei, Yi, Nan, Yu, ChunXu, Yu, HaiJun, Yue, JianFeng, Zeng, XiongHui, Zeng, Ming, Zeng, Zhi, Zhang, FengShou, Zhang, YunHua, Zhao, MingGang, Zhou, JiFang, Zhou, ZuYing, Zhu, JingJun, Zhu, ZhongHua, and CDEX Collaboration

Published
2018
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16. Dark Matter Results from First 98.7-day Data of PandaX-II Experiment

Author

II Collaboration, Tan, Andi, Xiao, Mengjiao, Cui, Xiangyi, Chen, Xun, Chen, Yunhua, Fang, Deqing, Fu, Changbo, Giboni, Karl, Giuliani, Franco, Gong, Haowei, Hu, Shouyang, Huang, Xingtao, Ji, Xiangdong, Ju, Yonglin, Lei, Siao, Li, Shaoli, Li, Xiaomei, Li, Xinglong, Liang, Hao, Lin, Qing, Liu, Huaxuan, Liu, Jianglai, Lorenzon, Wolfgang, Ma, Yugang, Mao, Yajun, Ni, Kaixuan, Ren, Xiangxiang, Schubnell, Michael, Shen, Manbin, Shi, Fang, Wang, Hongwei, Wang, Jiming, Wang, Meng, Wang, Qiuhong, Wang, Siguang, Wang, Xuming, Wang, Zhou, Wu, Shiyong, Xiao, Xiang, Xie, Pengwei, Yan, Binbin, Yang, Yong, Yue, Jianfeng, Zeng, Xionghui, Zhang, Hongguang, Zhang, Hua, Zhang, Huanqiao, Zhang, Tao, Zhao, Li, Zhou, Jing, Zhou, Ning, and Zhou, Xiaopeng

Subjects
High Energy Physics - Experiment (hep-ex), Physics - Instrumentation and Detectors, FOS: Physical sciences, Instrumentation and Detectors (physics.ins-det), High Energy Physics - Experiment
Abstract

We report the 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$\times10^4$ 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 3.5 and 1000 GeV/c$^2$. The best upper limit on the scattering cross section is found $2.5\times 10^{-46}$ cm$^2$ for the WIMP mass 40 GeV/c$^2$ at 90% confidence level., version accepted by PRL, 12 pages, 5+11 figures (including supplementary materials), 4 tables

Published
2016

17. Jinping hydropower project: main technical issues on engineering geology and rock mechanics

Author

Wang Jian, Shen Manbin, and Wu Shiyong

Subjects
business.industry, Engineering geology, Geology, Geotechnical Engineering and Engineering Geology, Civil engineering, Arch dam, Overburden, Rock mechanics, Hydroelectricity, Nature Conservation, business, China, Hydropower
Abstract

In 1978, the Jinping Project was designed as an integrated hydroelectric power scheme on the Yalong River in Southwest China. Jinping I involves a 305 m high arch dam on the upstream side of the Great Jinping River Bend. Water is directed through the mountains in four 16.7 km long, c. 13 m diameter tunnels, beneath up to 2,525 m of overburden, to the Jinping II underground powerhouse where the head is 310 m. The combined schemes will produce 8,400 MW and an annual power generation of 40.8 TW.h.

Published
2010

19. Performances of a prototype point-contact germanium detector immersed in liquid nitrogen for light dark matter search

Author

Jiang, Hao, Yang, LiTao, Yue, Qian, Kang, KeJun, Cheng, JianPing, Li, YuanJing, Wong, Henry, Ağartioğlu, M., An, HaiPeng, Chang, JianPing, Chen, JingHan, Chen, YunHua, Deng, Zhi, Du, Qiang, Gong, Hui, He, Li, Hu, JinWei, Hu, QingDong, Huang, HanXiong, Jia, LiPing, Li, HauBin, Li, Hong, Li, JianMin, Li, Jin, Li, Xia, Li, XueQian, Li, YuLan, Liao, Bin, Lin, FongKay, Lin, ShinTed, Liu, ShuKui, Liu, YanDong, Liu, YuanYuan, Liu, ZhongZhi, Ma, Hao, Ma, JingLu, Pan, Hui, Ren, Jie, Ruan, XiChao, Sevda, B., Sharma, Vivek, Shen, ManBin, Singh, Lakhwinder, Singh, Monoj, Sun, TianXi, Tang, ChangJian, Tang, WeiYou, Tian, Yang, Wang, GuangFu, Wang, JiMin, Wang, Li, Wang, Qing, Wang, Yi, Wu, ShiYong, Wu, YuCheng, Xing, HaoYang, Xu, Yin, Xue, Tao, Yang, SongWei, Yi, Nan, Yu, ChunXu, Yu, HaiJun, Yue, JianFeng, Zeng, XiongHui, Zeng, Ming, Zeng, Zhi, Zhang, FengShou, Zhang, YunHua, Zhao, MingGang, Zhou, JiFang, Zhou, ZuYing, Zhu, JingJun, and Zhu, ZhongHua

Abstract

The CDEX-10 experiment searches for light weakly interacting massive particles, a form of dark matter, at the China Jinping Underground Laboratory, where approximately 10 kg of germanium detectors are arranged in an array and immersed in liquid nitrogen. Herein, we report on the experimental apparatus, detector characterization, and spectrum analysis of one prototype detector. Owing to the higher rise-time resolution of the CDEX-10 prototype detector as compared with CDEX-1B, we identified the origin of an observed category of extremely fast events. For data analysis of the CDEX-10 prototype detector, we introduced and applied an improved bulk/surface event discrimination method. The results of the new method were compared to those of the CDEX-1B spectrum. Both sets of results showed good consistency in the 0–12 keVee energy range, except for the 8.0 keV K-shell X-ray peak from the external copper.

Published
2019
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22. Search for Cosmic-Ray Boosted Sub-MeV Dark-Matter-Electron Scattering in PandaX-4T.

Author

Shang X, Abdukerim A, Bo Z, Chen W, Chen X, Chen Y, Cheng C, Cheng Z, Cui X, Fan Y, Fang D, Geng L, Giboni K, Guo X, Han C, Han K, He C, He J, Huang D, Huang J, Huang Z, Hou R, Hou Y, Ji X, Ji X, Ju Y, Li C, Li J, Li M, Li S, Li T, Lin Q, Liu J, Lu C, Lu X, Luo L, Luo Y, Ma W, Ma Y, Mao Y, Meng Y, Ning X, Pang B, Qi N, Qian Z, Ren X, Shaheed N, Shao X, Shen G, Shen M, Si L, Sun W, Tao Y, Wang A, Wang M, Wang Q, Wang S, Wang S, Wang W, Wang X, Wang X, Wang Z, Wei Y, Wu M, Wu W, Wu Y, Xiao M, Xiao X, Xiong K, Yan B, Yan X, Yang Y, Yu C, Yuan Y, Yuan Z, Yun Y, Zeng X, Zhang M, Zhang P, Zhang S, Zhang S, Zhang T, Zhang W, Zhang Y, Zhang Y, Zhang Y, Zhao L, Zhou J, Zhou N, Zhou X, Zhou Y, Zhou Z, Ge SF, and Xia C

Abstract

We report the first search for the elastic scatterings between cosmic-ray boosted sub-MeV dark matter (DM) and electrons in the PandaX-4T liquid xenon experiment. Sub-MeV DM particles can be accelerated by scattering with electrons in the cosmic rays and produce detectable electron recoil signals in the detector. Using the commissioning data from PandaX-4T of 0.63  tonne·year exposure, we set new constraints on DM-electron scattering cross sections for DM masses ranging from 10  eV/c^{2} to 3  keV/c^{2}.

Published
2024
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23. Dark Matter Results from First 98.7 Days of Data from the PandaX-II Experiment.

Author

Tan A, Xiao M, Cui X, Chen X, Chen Y, Fang D, Fu C, Giboni K, Giuliani F, Gong H, Guo X, Han K, Hu S, Huang X, Ji X, Ju Y, Lei S, Li S, Li X, Li X, Liang H, Lin Q, Liu H, Liu J, Lorenzon W, Ma Y, Mao Y, Ni K, Ren X, Schubnell M, Shen M, Shi F, Wang H, Wang J, Wang M, Wang Q, Wang S, Wang X, Wang Z, Wu S, Xiao X, Xie P, Yan B, Yang Y, Yue J, Zeng X, Zhang H, Zhang H, Zhang H, Zhang T, Zhao L, Zhou J, Zhou N, and Zhou X

Abstract

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.

Published
2016
Full Text
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