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

Authors :: 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.
Du, Q.
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.
Li, J.
Li, X.
Li, X. Q.
Li, X. Y.
Li, Y. L.
Liao, H. Y.
Lin, F. K.
Lü, L. C.
Ma, H.
Mao, S. J.
Qin, J. Q.
Ren, J.
Ruan, X. C.
Shen, M. B.
Singh, L.
Singh, M. K.
Soma, A. K.
Su, J.
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.
Xu, Y.
Xu, X. J.
Xue, T.
Yang, C. W.
Yang, L. T.
Yang, S. W.
Yi, N.
Yu, C. X.
Yu, H.
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.
Source :: Phys. Rev. D 90, 032003 (2014)
Publication Year :: 2014
Abstract: 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.<br />Comment: 8 pages, 13 figures, 2 tables. To be published in Phys. Rev. D

Subjects :: High Energy Physics - Experiment
Astrophysics - Cosmology and Nongalactic Astrophysics
Physics - Instrumentation and Detectors

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