Limits on Light Weakly Interacting Massive Particles from the First 102.8 kg \({\times}\) day Data of the CDEX-10 Experiment

• Published in: arXiv.org 2018-06
• Main Authors: Jiang, H, Jia, L P, Yue, Q, Kang, K J, Cheng, J P, Li, Y J, Wong, H T, Agartioglu, M, An, H P, Chang, J P, Chen, J H, Chen, Y H, Deng, Z, Q Du, Gong, H, L He, Hu, J W, Hu, Q D, Huang, H X, Li, H B, H Li, Li, J M, J Li, X Li, 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, H Ma, Ma, J L, Pan, H, Ren, J, Ruan, X C, Sevda, B, Sharma, V, 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, Wu, S Y, Wu, Y C, Xing, H Y, Y Xu, Xue, T, Yang, L T, Yang, S W, N Yi, 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
• Format: Article
• Language: English
• Subjects: Confidence intervals; Liquid nitrogen; Weakly interacting massive particles
• ISSN: 2331-8422
• DOI: 10.48550/arxiv.1802.09016

We report the first results of a light weakly interacting massive particles (WIMPs) search from the CDEX-10 experiment with a 10 kg germanium detector array immersed in liquid nitrogen at the China Jinping Underground Laboratory with a physics data size of 102.8 kg day. At an analysis threshold of 160 eVee, improved limits of 8 \(\times 10^{-42}\) and 3 \(\times 10^{-36}\) cm\(^{2}\) at a 90\% confidence level on spin-independent and spin-dependent WIMP-nucleon cross sections, respectively, at a WIMP mass (\(m_{\chi}\)) of 5 GeV/\({c}^2\) are achieved. The lower reach of \(m_{\chi}\) is extended to 2 GeV/\({c}^2\).