| Title | Constraints on Spin-Independent Nucleus Scattering with sub-GeV Weakly Interacting Massive Particle Dark Matter from the CDEX-1B Experiment at the China Jinping Underground Laboratory |
| Authors | Liu, Z. Z. Yue, Q. Yang, L. T. Kang, K. J. Li, Y. J. Wong, H. T. Agartioglu, M. An, H. P. Chang, J. P. Chen, J. H. Chen, Y. H. Cheng, J. P. Deng, Z. Du, Q. Gong, H. Guo, X. Y. Guo, Q. J. He, L. He, S. M. Hu, J. W. Hu, Q. D. Huang, H. X. Jia, L. P. Jiang, H. Li, H. B. Li, H. Li, J. M. Li, J. Li, X. Li, X. Q. Li, Y. L. Liao, B. Lin, F. K. Lin, S. T. Liu, S. K. Liu, Y. D. Liu, Y. Y. Ma, H. Ma, J. L. Mao, Y. C. Ning, J. H. Pan, H. Qi, N. C. Ren, J. Ruan, X. C. Sharma, V She, Z. Singh, L. Singh, M. K. Sun, T. X. Tang, C. J. Tang, W. Y. Tian, Y. Wang, G. F. Wang, L. Wang, Q. Wang, Y. Wang, Y. X. Wu, S. Y. Wu, Y. C. Xing, H. Y. Xu, Y. Xue, T. Yi, N. Yu, C. X. Yu, H. J. Yue, J. F. Zeng, M. Zeng, Z. Zhang, F. S. Zhao, M. G. Zhou, J. F. Zhou, Z. Y. Zhu, J. J. |
| Affiliation | Tsinghua Univ, Minist Educ, Key Lab Particle & Radiat Imaging, Beijing 100084, Peoples R China Tsinghua Univ, Dept Engn Phys, Beijing 100084, Peoples R China Acad Sinica, Inst Phys, Taipei 11529, Taiwan Dokuz Eylul Univ, Dept Phys, TR-35160 Izmir, Turkey Tsinghua Univ, Dept Phys, Beijing 100084, Peoples R China NUCTECH Co, Beijing 100084, Peoples R China YaLong River Hydropower Dev Co, Chengdu 610051, Sichuan, Peoples R China Beijing Normal Univ, Coll Nucl Sci & Technol, Beijing 100875, Peoples R China Sichuan Univ, Coll Phys Sci & Technol, Chengdu 610065, Sichuan, Peoples R China Peking Univ, Sch Phys, Beijing 100871, Peoples R China China Inst Atom Energy, Dept Nucl Phys, Beijing 102413, Peoples R China Nankai Univ, Sch Phys, Tianjin 300071, Peoples R China Banaras Hindu Univ, Dept Phys, Varanasi 221005, Uttar Pradesh, India Beijing Normal Univ, Dept Phys, Beijing 100875, Peoples R China |
| Issue Date | 2019 |
| Publisher | PHYSICAL REVIEW LETTERS |
| Abstract | We report results on the searches of weakly interacting massive particles (WIMPs) with sub-GeV masses (m(chi)) via WIMP-nucleus spin-independent scattering with Migdal effect incorporated. Analysis on time-integrated (TI) and annual modulation (AM) effects on CDEX-1B data are performed, with 737.1 kg day exposure and 160 eVee threshold for TI analysis, and 1107.5 kg day exposure and 250 eVee threshold for AM analysis. The sensitive windows in m(chi) are expanded by an order of magnitude to lower DM masses with Migdal effect incorporated. New limits on sigma(SI)(chi N) at 90% confidence level are derived as 2 x 10(-32) similar to 7 x 10 (-35) cm(2) for TI analysis at m(chi) similar to 50-180 MeV/c(2), and 3 x 10(-32) similar to 9 x 10 (-38) cm(2) for AM analysis at m(chi) similar to 75 MeV/c(2)-3.0 GeV/c(2). |
| URI | http://hdl.handle.net/20.500.11897/553377 |
| ISSN | 0031-9007 |
| DOI | 10.1103/PhysRevLett.123.161301 |
| Indexed | SCI(E) EI |
| Appears in Collections: | 物理学院 |
