arXiv · 1910.13234
Direct Detection Constraints on Dark Photons with CDEX-10 Experiment at the China Jinping Underground Laboratory
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 ${\rm{κ=1.3 \times 10^{-15}}}$ at ${\rm{m_V=200\ eV/c^2}}$.
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Z. She, L. P. Jia, Q. Yue, H. Ma, K. J. Kang, Y. J. Li, M. Agartioglu, 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, Q. J. Guo, X. Y. Guo, L. He, S. M. 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. K. Lin, S. T. Lin, S. K. Liu, Y. D. Liu, Y. Y. Liu, Z. Z. Liu, Y. C. Mao, Q. Y. Nie, J. H. Ning, H. Pan, N. C. Qi, C. K. Qiao, J. Ren, X. C. Ruan, B. Sevda, C. S. Shang, V. Sharma, L. Singh, M. K. Singh, T. X. Sun, C. J. Tang, W. Y. Tang, Y. Tian, G. F. Wang, L. Wang, Q. Wang, Y. Wang, Y. X. Wang, Z. Wang, H. T. Wong, S. Y. 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, 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. 2020-03-18. Direct Detection Constraints on Dark Photons with CDEX-10 Experiment at the China Jinping Underground Laboratory. https://doi.org/10.1103/physrevlett.124.111301
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