Improved limits on solar axions and bosonic dark matter from the CDEX-1B experiment using the profile likelihood ratio method
Y. Wang, Q. Yue, S. K. Liu, K. J. Kang, Y. J. Li, H. P. An, J. P. Chang, J. H. Chen, Y. H. Chen, J. P. Cheng, W. H. Dai, Z. Deng, X. P. Geng, H. Gong, P. Gu, X.… 展开作者
Y. Wang, Q. Yue, S. K. Liu, K. J. Kang, Y. J. Li, H. P. An, J. P. Chang, J. H. Chen, Y. H. Chen, J. P. Cheng, W. H. Dai, Z. Deng, X. P. Geng, H. Gong, P. Gu, X. Y. Guo, H. T. He, L. He, S. M. He, J. W. Hu, H. X. Huang, T. C. Huang, L. P. Jia, H. B. Li, H. Li, M. X. Li, J. M. Li, J. Li, X. Li, X. Q. Li, Y. L. Li, B. Liao, F. K. Lin, S. T. Lin, Y. D. Liu, Y. Y. Liu, Z. Z. Liu, H. Ma, Q. Y. Nie, J. H. Ning, H. Pan, N. C. Qi, C. K. Qiao, J. Ren, X. C. Ruan, V. Sharma, Z. She, L. Singh, M. K. Singh, T. X. Sun, C. J. Tang, W. Y. Tang, Y. Tian, G. F. Wang, L. Wang, Q. Wang, Z. Wang, H. T. Wong, S. Y. Wu, Y. C. Wu, H. Y. Xing, Y. Xu, T. Xue, Y. L. Yan, L. T. Yang, N. Yi, C. X. Yu, H. J. Yu, J. F. Yue, X. H. Zeng, M. Zeng, Z. Zeng, B. T. Zhang, F. S. Zhang, L. Zhang, Z. Y. Zhang, M. G. Zhao, J. F. Zhou, Z. Y. Zhou, J. J. Zhu
We present the improved constraints on couplings of solar axions and more generic bosonic dark matter particles using 737.1 kg-days of data from the CDEX-1B experiment. The CDEX-1B experiment, located at the China Jinping Underground Laboratory, primarily aims at the direct detection of weakly interacting massive particles using a p-type point-contact germanium detector. We adopt the profile likelihood ratio method for analysis of data in the presence of backgrounds. An energy threshold of 160 eV was achieved, much better than the 475 eV of CDEX-1A with an exposure of 335.6 kg-days. This significantly improves the sensitivity for the bosonic dark matter below 0.8 keV among germanium detectors. Limits are also placed on the coupling $g_{Ae} < 2.48 \times 10^{-11}$ from Compton, bremsstrahlung, atomic-recombination and de-excitation channels and $g^{eff}_{AN} \times g_{Ae} < 4.14 \times 10^{-17}$ from a $^{57}$Fe M1 transition at 90\% confidence level.
Cavity, lumped-circuit, and spin-based detection of axion dark matter: differences and similarities
Bilkent University（比尔肯特大学）；Johannes Gutenberg-Universität Mainz（美因茨约翰内斯·古腾堡大学）；Helmholtz Institute Mainz（美因茨亥姆霍兹研究所）；GSI Helmholtzzentrum für Schwerionenforschung GmbH（德国重离子研究中心有限公司）；Department of Physics, University of California, Berkeley（加州大学伯克利分校物理系）；School of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University（北京大学物理学院及核物理与核技术国家重点实验室）；Department of Physics and Astronomy, University of Mississippi（密西西比大学物理与天文学系）；University of Washington（华盛顿大学）；Department of Physics, California State University - East Bay（加州州立大学东湾分校物理系）
Dark Matter Detection through Rydberg Atom Transducer
Southern University of Science and Technology（南方科技大学）；International Shenzhen Quantum Academy（深圳国际量子研究院）；Peking University（北京大学）；Beijing Laser Acceleration Innovation Center（北京激光加速创新中心）；City University of Hong Kong（香港城市大学）；City University of Hong Kong Shenzhen Research Institute（香港城市大学深圳研究院）；Nanjing University（南京大学）
