First results on low-mass WIMP from the CDEX-1 experiment at the China Jinping underground Laboratory

The China Dark matter Experiment collaboration reports the first experimental limit on WIMP dark matter from 14.6 kg-day of data taken with a 994 g p-type point-contact germanium detector at the China Jinping underground Laboratory where the rock overburden is more than 2400 m. The energy threshold...

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Veröffentlicht in:	arXiv.org 2013-08
Hauptverfasser:	Zhao, W, Yue, Q, Kang, K J, Cheng, J P, Li, Y J, Lin, S T, Bai, Y, Y Bi, Chang, J P, Chen, N, Chen, Q H, Chen, Y H, Chuang, Y C, Deng, Z, C Du, Q Du, Gong, H, Hao, X Q, He, H J, He, Q J, Hu, X H, Huang, H X, Huang, T R, Jiang, H, Li, H B, Li, J M, J Li, X Li, Li, X Y, Li, Y L, Liao, H Y, Lin, F K, Liu, S K, Lv, 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, Wong, H T, Wu, S Y, W Wu, Wu, Y C, Xianyu, Z Z, Xing, H Y, Y Xu, Xu, X J, Xue, T, 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, Zhong, S N, Zhou, Z Y, Zhu, J J, Zhu, W B, Zhu, X Z, Zhu, Z H
Format:	Artikel
Sprache:	eng
Schlagworte:	Confidence intervals Dark matter Laboratories Overburden 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 collaboration reports the first experimental limit on WIMP dark matter from 14.6 kg-day of data taken with a 994 g p-type point-contact germanium detector at the China Jinping underground Laboratory where the rock overburden is more than 2400 m. The energy threshold achieved was 400 eVee. According to the 14.6 kg-day live data, we placed the limit of N= 1.75 * 10^{-40} cm^{2} at 90% confidence level on the spin-independent cross-section at WIMP mass of 7 GeV before differentiating bulk signals from the surface backgrounds.
ISSN:	2331-8422
DOI:	10.48550/arxiv.1306.4135