Journal
PHYSICAL REVIEW D
Volume 90, Issue 9, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.90.091701
Keywords
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Funding
- National Natural Science Foundation of China [10935005, 10945002, 11275107, 11175099]
- National Basic Research program of China (973 Program) [2010CB833006]
- Academia Sinica Principal Investigator Grant from Taiwan
- [NSC 99-2112-M-001-017-MY3]
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We report results of a search for light dark matter weakly interacting massive particles (WIMPs) with CDEX-1 experiment at the China Jinping Underground Laboratory, based on 53.9 kg-days of data from a p-type point-contact germanium detector enclosed by a NaI(Tl) crystal scintillator as anti-Compton detector. The event rate and spectrum above the analysis threshold of 475 eVee are consistent with the understood background model. Part of the allowed regions for WIMP-nucleus coherent elastic scattering at WIMP mass of 6-20 GeV are probed and excluded. Independent of interaction channels, this result contradicts the interpretation that the anomalous excesses of the CoGeNT experiment are induced by dark matter, since identical detector techniques are used in both experiments.
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