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arXiv · 1802.09016

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

H. Jiang·L. P. Jia·Q. Yue·K. J. Kang·J. P. Cheng·Y. J. Li·H. T. Wong·M. Agartioglu·H. P. An·J. P. Chang·J. H. Chen·Y. H. Chen·Z. Deng·Q. Du·H. Gong·L. He·J. W. Hu·Q. D. Hu·H. X. Huang·H. B. Li·H. Li·J. M. Li·J. 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·H. Ma·J. L. Ma·H. Pan·J. Ren·X. C. Ruan·B. Sevda·V. Sharma·M. B. Shen·L. Singh·M. K. Singh·T. X. Sun·C. J. Tang·W. Y. Tang·Y. Tian·G. F. Wang·J. M. Wang·L. Wang·Q. Wang·Y. Wang·S. Y. Wu·Y. C. Wu·H. Y. Xing·Y. Xu·T. Xue·L. T. Yang·S. W. Yang·N. Yi·C. X. Yu·H. J. Yu·J. F. Yue·X. H. Zeng·M. Zeng·Z. Zeng·F. S. Zhang·Y. H. Zhang·M. G. Zhao·J. F. Zhou·Z. Y. Zhou·J. J. Zhu·Z. H. Zhu
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Abstract

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/${c}^2$.

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H. Jiang, L. P. Jia, Q. Yue, K. J. Kang, J. P. Cheng, Y. J. Li, H. T. Wong, M. Agartioglu, H. P. An, J. P. Chang, J. H. Chen, Y. H. Chen, Z. Deng, Q. Du, H. Gong, L. He, J. W. Hu, Q. D. Hu, H. X. Huang, H. B. Li, H. Li, J. M. Li, J. 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, H. Ma, J. L. Ma, H. Pan, J. Ren, X. C. Ruan, B. Sevda, V. Sharma, M. B. Shen, L. Singh, M. K. Singh, T. X. Sun, C. J. Tang, W. Y. Tang, Y. Tian, G. F. Wang, J. M. Wang, L. Wang, Q. Wang, Y. Wang, S. Y. Wu, Y. C. Wu, H. Y. Xing, Y. Xu, T. Xue, L. T. Yang, S. W. Yang, N. Yi, C. X. Yu, H. J. Yu, J. F. Yue, X. H. Zeng, M. Zeng, Z. Zeng, F. S. Zhang, Y. H. Zhang, M. G. Zhao, J. F. Zhou, Z. Y. Zhou, J. J. Zhu, Z. H. Zhu. 2018-02-25. Limits on Light Weakly Interacting Massive Particles from the First 102.8 kg ${\times}$ day Data of the CDEX-10 Experiment. https://doi.org/10.1103/physrevlett.120.241301

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