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Yang, L T; Li, H B; Yue, Q; Ma, H; Kang, K J; Li, Y J; Wong, H T; Agartioglu, M; An, H P; Chang, J P; Chen, J H; Chen, Y H; Cheng, J P; Deng, Z; Du, Q; Gong, H; Guo, Q J; He, L; Hu, J W; Hu, Q D; Huang, H X; Jia, L P; Jiang, H; Li, H; Li, J M; Li, J; 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; Ma, J L; Mao, Y C; Pan, H; Ren, J; Ruan, X C; Sharma, V; She, Z; Shen, M B; Singh, L; Singh, M K; Sun, T X; Tang, C J; Tang, W Y; Tian, Y; Wang, G F; Wang, J M; Wang, L; Wang, Q; Wang, Y; Wang, Y X; Wu, S Y; Wu, Y C; Xing, H Y; Xu, Y; Xue, T; Yi, N; Yu, C X; Yu, H J; Yue, J F; Zeng, X H; Zeng, M; Zeng, Z; Zhang, F S; Zhang, Y H; Zhao, M G; Zhou, J F; Zhou, Z Y; Zhu, J J; Zhu, Z H
Physical review letters, 2019-Nov-29, Letnik: 123, Številka: 22Journal Article
We present results on light weakly interacting massive particle (WIMP) searches with annual modulation (AM) analysis on data from a 1-kg mass p-type point-contact germanium detector of the CDEX-1B experiment at the China Jinping Underground Laboratory. Datasets with a total live time of 3.2 yr within a 4.2-yr span are analyzed with analysis threshold of 250 eVee. Limits on WIMP-nucleus (χ-N) spin-independent cross sections as function of WIMP mass (m_{χ}) at 90% confidence level (C.L.) are derived using the dark matter halo model. Within the context of the standard halo model, the 90% C.L. allowed regions implied by the DAMA/LIBRA and CoGeNT AM-based analysis are excluded at >99.99% and 98% C.L., respectively. These results correspond to the best sensitivity at m_{χ}<6 GeV/c^{2} among WIMP AM measurements to date.
