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arXiv · 1910.13234

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

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
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Abstract

We report constraints on the dark photon effective kinetic mixing parameter (${\kappa}$) 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 ${\kappa}$ 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 ${\rm{\kappa=1.3 \times 10^{-15}}}$ 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. 2019-10-29. 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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