Direct Detection Constraints on Dark Photons with the CDEX-10 Experiment at the China Jinping Underground Laboratory.

/ Authors

Z. She, L. Jia, Q. Yue, H. Ma, K. Kang, Y. J. Li, M. Ağartioğlu, H. An, J. P. Chang, J. H. Chen

and 74 more authors

Y. H. Chen, J. P. Cheng, W. Dai, Z. Deng, X. Geng, H. Gong, P. Gu, Q. Guo, X. Y. Guo, L. He, S. He, H. T. He, J. W. Hu, T. C. Huang, H. X. Huang, H. B. Li, H. Li, J. M. Li, J. Li, M. X. Li, X. Li, X. Q. Li, Y. L. Li, B. Liao, F. Lin, S. T. Lin, S. K. Liu, Y. D. Liu, Y. Y. Liu, Z. Z. Liu, Y. Mao, Q. Nie, Jin Ning, H. Pan, N. Qi, C. Qiao, J. Ren, X. Ruan, B. Sevda, C. Shang, V. Sharma, L. Singh, M. K. Singh, T. Sun, C. J. Tang, W. Tang, Y. Tian, G. F. Wang, L. Wang, Q. Wang, Y. Wang, Y. X. Wang, Z. Wang, H. Wong, S. Y. Wu, H. Xing, Y. Xu, T. Xue, Y. L. Yan, L. T. Yang, N. Yi, C. X. Yu, H. J. Yu, J. Yue, M. Zeng, Z. Zeng, B. T. Zhang, L. Zhang, F. S. Zhang, Z. Y. Zhang, M. G. Zhao, J. F. Zhou, Z. Y. Zhou, J. J. Zhu

/ Abstract

We report constraints on the dark photon effective kinetic mixing parameter (κ) with data taken from two p-type point-contact germanium detectors of the CDEX-10 experiment at the China Jinping Underground Laboratory. The 90% confidence level upper limits on κ of solar dark photon from 205.4 kg-day exposure are derived, probing new parameter space with masses (m_{V}) from 10 to 300 eV/c^{2} in direct detection experiments. Considering dark photon as the cosmological dark matter, limits at 90% confidence level with m_{V} from 0.1 to 4.0 keV/c^{2} are set from 449.6 kg-day data, with a minimum of κ=1.3×10^{-15} at m_{V}=200 eV/c^{2}.

Journal: Physical review letters

DOI: 10.1103/PhysRevLett.124.111301