Limits on light WIMPs with a germanium detector at 177 eVee threshold at the China Jinping Underground Laboratory

The China Dark Matter Experiment reports results on light WIMP dark matter searches at the China Jinping Underground Laboratory with a germanium detector array with a total mass of 20 g. The physics threshold achieved is 177 eVee ("ee" represents electron equivalent energy) at 50% signal e...

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Veröffentlicht in:	arXiv.org 2014-08
Hauptverfasser:	Liu, S K, Yue, Q, Kang, K J, Cheng, J P, Wong, H T, Li, Y J, Lin, S T, Chang, J P, Chen, N, Chen, Q H, Chen, Y H, Chuang, Y C, Deng, Z, Q Du, Gong, H, Hao, X Q, He, H J, He, Q J, Huang, H X, Huang, T R, Jiang, H, Li, H B, Li, J M, J Li, X Li, Li, X Q, Li, X Y, Li, Y L, Liao, H Y, Lin, F K, Lü, L C, H Ma, Mao, S J, Qin, J Q, Ren, J, Ruan, X C, Shen, M B, Singh, L, Singh, M K, Soma, A K, J Su, Tang, C J, Tseng, C H, Wang, J M, Wang, L, Wang, Q, Wu, S Y, Wu, Y C, Xianyu, Z Z, Xiao, R Q, Xing, H Y, Xu, F Z, Y Xu, Xu, X J, Xue, T, Yang, C W, Yang, L T, Yang, S W, N Yi, Yu, C X, H Yu, Yu, X Z, Zeng, X H, Zeng, Z, Zhang, L, Zhang, Y H, Zhao, M G, Zhao, W, Zhou, Z Y, Zhu, J J, Zhu, W B, Zhu, X Z, Zhu, Z H
Format:	Artikel
Sprache:	eng
Schlagworte:	Dark matter Laboratories Physics - Cosmology and Nongalactic Astrophysics Physics - High Energy Physics - Experiment Physics - Instrumentation and Detectors Weakly interacting massive particles
Online-Zugang:	Volltext
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Beschreibung
Zusammenfassung:	The China Dark Matter Experiment reports results on light WIMP dark matter searches at the China Jinping Underground Laboratory with a germanium detector array with a total mass of 20 g. The physics threshold achieved is 177 eVee ("ee" represents electron equivalent energy) at 50% signal efficiency. With 0.784 kg-days of data, exclusion region on spin-independent coupling with the nucleon is derived, improving over our earlier bounds at WIMP mass less than 4.6 GeV.
ISSN:	2331-8422
DOI:	10.48550/arxiv.1403.5421