Limits on Light Weakly Interacting Massive Particles from the First 102.8 kg×day Data of the CDEX-10 Experiment

Limits on Light Weakly Interacting Massive Particles from the First 102.8 kg×day Data of the CDEX-10 Experiment

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 1...

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Veröffentlicht in:Physical review letters 2018-06, Vol.120 (24), p.241301-241301, Article 241301
Hauptverfasser: 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, Du, Q, Gong, H, He, L, Hu, J W, Hu, Q D, Huang, H X, Li, H B, 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, H, 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, Xu, Y, Xue, T, Yang, L T, Yang, S W, 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
Format: Artikel
Sprache:eng
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Confidence intervals
Liquid nitrogen
Weakly interacting massive particles
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Zusammenfassung: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 8×10^{-42} and 3×10^{-36}  cm^{2} at a 90% confidence level on spin-independent and spin-dependent WIMP-nucleon cross sections, respectively, at a WIMP mass (m_{χ}) of 5  GeV/c^{2} are achieved. The lower reach of m_{χ} is extended to 2  GeV/c^{2}.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.120.241301