会议专题

First results on low-mass WIMPs from the CDEX-1 experiment at the China Jinping underground laboratory

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The China Dark Matter Experiment Collaboration reports the first experimental limit on weakly interacting massive particles (WIMPs) dark matter from 14.6 kg-days 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 σxN =1.75 × 10-40 cm2 at a 90％ confidence level on the spin-independent cross section at a WIMP mass of 7 GeV before differentiating bulk signals from the surface backgrounds.

W.Zhao Q.Yue K.J.Kang J.P.Cheng Y.J.Li S.T.Lin Y.Bai Y.Bi J.P.Chang N.Chen N.Chen Q.H.Chen Y.H.Chen Y.C.Chuang Z.Deng C.Du Q.Du H.Gong X.Q.Hao H.J.He Q.J.He X.H.Hu H.X.Huang T.R.Huang H.Jiang H.B.Li J.M.Li J.Li J.Li X.Li X.Y.Li Y.L.Li H.Y.Liao F.K.Lin S.K.Liu L.C.Lü H.Ma S.J.Mao J.Q.Qin J.Ren J.Ren X.C.Ruan M.B.Shen L.Singh M.K.Singh A.K.Soma J.Su C.J.Tang C.H.Tseng J.M.Wang L.Wang Q.Wang H.T.Wong S.Y.Wu W.Wu Y.C.Wu Y.C.Wu Z.Z.Xianyu H.Y.Xing Y.Xu X.J.Xu T.Xue L.T.Yang S.W.Yang N.Yi C.X.Yu H.Yu X.Z.Yu X.H.Zeng Z.Zeng L.Zhang Y.H.Zhang M.G.Zhao S.N.Zhong Z.Y.Zhou J.J.Zhu W.B.Zhu X.Z.Zhu Z.H.Zhu

Key Laboratory of Particle and Radiation Imaging (Ministry of Education) and Department of Engineeri Institute of Physics, Academia Sinica, Taipei 11529 School of Physics, Nankai University, Tianjin 300071 School of Physical Science and Technology, Sichuan University, Chengdu 610065 NUCTECH Company, Beijing 10084 YaLong River Hydropower Development Company, Chengdu 610051 Department of Nuclear Physics, China Institute of Atomic Energy, Beijing 102413 Institute of Physics, Academia Sinica, Taipei 11529;Department of Physics, Banaras Hindu University,

国际会议

第十二届全国博士生学术年会——物理学专题

昆明

英文

356-360

2014-05-01（万方平台首次上网日期，不代表论文的发表时间）