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She, Z; Jia, L P; Yue, Q; Ma, H; Kang, K J; Li, Y J; Agartioglu, M; An, H P; Chang, J P; Chen, J H; Chen, Y H; Cheng, J P; Dai, W H; Deng, Z; Geng, X P; Gong, H; Gu, P; Guo, Q J; Guo, X Y; He, L; He, S M; He, H T; Hu, J W; Huang, T C; Huang, H X; Li, H B; Li, H; Li, J M; Li, J; Li, M X; Li, X; Li, X Q; Li, Y L; Liao, B; Lin, F K; Lin, S T; Liu, S K; Liu, Y D; Liu, Y Y; Liu, Z Z; Mao, Y C; Nie, Q Y; Ning, J H; Pan, H; Qi, N C; Qiao, C K; Ren, J; Ruan, X C; Sevda, B; Shang, C S; Sharma, V; Singh, L; 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; Wang, Z; Wong, H T; Wu, S Y; Xing, H Y; Xu, Y; Xue, T; Yan, Y L; Yang, L T; Yi, N; Yu, C X; Yu, H J; Yue, J F; Zeng, M; Zeng, Z; Zhang, B T; Zhang, L; Zhang, F S; Zhang, Z Y; Zhao, M G; Zhou, J F; Zhou, Z Y; Zhu, J J
Physical review letters, 03/2020, Letnik: 124, Številka: 11Journal Article
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}.
