| Title | Search for neutrinoless double-beta decay of Ge-76 with a natural broad energy germanium detector |
| Authors | Dai, W. H. Ma, H. Yue, Q. She, Z. Kang, K. J. Li, Y. J. Agartioglu, M. An, H. P. Chang, J. P. Chen, Y. H. Cheng, J. P. Deng, Z. Fang, C. H. Geng, X. P. Gong, H. Guo, Q. J. Guo, X. Y. He, L. He, S. M. Hu, J. W. Huang, H. X. Huang, T. C. Jia, H. T. Jiang, X. Li, H. B. Li, J. M. Li, J. Li, Q. Y. Li, R. M. J. Li, X. Q. Li, Y. L. Liang, Y. F. Liao, B. Lin, F. K. Lin, S. T. Liu, S. K. Liu, Y. D. Liu, Y. Liu, Y. Y. Liu, Z. Z. Mao, Y. C. Nie, Q. Y. Ning, J. H. Pan, H. Qi, N. C. Ren, J. Ruan, X. C. Saraswat, K. Sharma, V 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. Wong, H. T. Wu, S. Y. Wu, Y. C. Xing, H. Y. Xu, R. Xu, Y. Xue, T. Yan, Y. L. Yang, L. T. Yeh, C. H. Yi, N. Yu, C. X. Yu, H. J. Yue, J. F. Zeng, M. Zeng, Z. Zhang, B. T. Zhang, F. S. Zhang, L. Zhang, Z. H. Zhang, Z. Y. Zhao, K. K. 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 Tsinghua Univ, Dept Phys, Beijing 100084, Peoples R China NUCTECH Co, Beijing 100084, Peoples R China YaLong River Hydropower Dev Co, Chengdu 610051, Peoples R China Beijing Normal Univ, Coll Nucl Sci & Technol, Beijing 100875, Peoples R China Sichuan Univ, Coll Phys, Chengdu 610065, Peoples R China Peking Univ, Sch Phys, Beijing 100871, Peoples R China China Inst Atom Energy, Dept Nucl Phys, Beijing 102413, Peoples R China Sun Yat Sen Univ, Sino French Inst Nucl & Technol, Zhuhai 519082, 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 | 17-Aug-2022 |
| Publisher | PHYSICAL REVIEW D |
| Abstract | A natural broad energy germanium detector is operated in the China Jinping Underground Laboratory for a feasibility study of building the next generation experiment of the neutrinoless double-beta (0 nu beta beta) decay of Ge-76. The setup of the prototype facility, characteristics of the broad energy germanium detector, background reduction methods, and data analysis are described in this paper. A background index of 6.4 x 10(-3) counts/(keV kg day) is achieved and 1.86 times lower than our previous result of the CDEX-1 detector. No signal is observed with an exposure of 186.4 kg day, thus a limit on the half life of Ge-76 0 nu beta beta decay is set at T-1/2(0 nu) > 5.62 x 10(22) yr at 90% C.L. The limit corresponds to an effective Majorana neutrino mass in the range of 4.6-10.3 eV, dependent on the nuclear matrix elements. |
| URI | http://hdl.handle.net/20.500.11897/667688 |
| ISSN | 2470-0010 |
| DOI | 10.1103/PhysRevD.106.032012 |
| Indexed | SCI(E) |
| Appears in Collections: | 物理学院 |
