We report results of a search for light weakly interacting massive particle（WIMP） dark matter from the CDEX-1 experiment at the China Jinping Underground Laboratory（CJPL）. Constraints on WIMP-nucleon spin-independ...We report results of a search for light weakly interacting massive particle（WIMP） dark matter from the CDEX-1 experiment at the China Jinping Underground Laboratory（CJPL）. Constraints on WIMP-nucleon spin-independent（SI） and spin-dependent（SD） couplings are derived with a physics threshold of 160 eVee, from an exposure of 737.1 kg-days. The SI and SD limits extend the lower reach of light WIMPs to 2 GeV and improve over our earlier bounds at WIMP mass less than 6 GeV.展开更多
基金Supported by the National Key Research and Development Program of China(2017YFA0402200,2017YFA0402201)the National Natural Science Foundation of China(11175099,11275107,11475117,11475099,11475092,11675088)+2 种基金the National Basic Research Program of China(973 Program)(2010CB833006)support of grants from the Tsinghua University Initiative Scientific Research Program(20121088494,20151080354)the Academia Sinica Investigator Award 2011-15,contracts 103-2112-M-001-024 and104-2112-M-001-038-MY3 from the Ministry of Science and Technology of Taiwan
文摘We report results of a search for light weakly interacting massive particle（WIMP） dark matter from the CDEX-1 experiment at the China Jinping Underground Laboratory（CJPL）. Constraints on WIMP-nucleon spin-independent（SI） and spin-dependent（SD） couplings are derived with a physics threshold of 160 eVee, from an exposure of 737.1 kg-days. The SI and SD limits extend the lower reach of light WIMPs to 2 GeV and improve over our earlier bounds at WIMP mass less than 6 GeV.
