期刊
PHYSICAL REVIEW D
卷 92, 期 7, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.92.072003
关键词
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资金
- National Science Foundation, the U.S. Department of Energy, NSERC Canada
- MultiDark (Spanish MINECO)
- United States Department of Energy [DE-AC02-76SF00515]
- [De-AC02-07CH11359]
- Direct For Mathematical & Physical Scien [1408597] Funding Source: National Science Foundation
- Division Of Physics [1408597] Funding Source: National Science Foundation
- Division Of Physics
- Direct For Mathematical & Physical Scien [1550658] Funding Source: National Science Foundation
- Division Of Physics
- Direct For Mathematical & Physical Scien [1408646, 1546843, 1408414, 1102841] Funding Source: National Science Foundation
CDMS II data from the five-tower runs at the Soudan Underground Laboratory were reprocessed with an improved charge-pulse fitting algorithm. Two new analysis techniques to reject surface-event backgrounds were applied to the 612 kg days germanium-detector weakly interacting massive particle (WIMP)-search exposure. An extended analysis was also completed by decreasing the 10 keV analysis threshold to similar to 5 keV, to increase sensitivity near a WIMP mass of 8 GeV/c(2). After unblinding, there were zero candidate events above a deposited energy of 10 keV and six events in the lower-threshold analysis. This yielded minimum WIMP-nucleon spin-independent scattering cross-section limits of 1.8 x 10(-44) and 1.18 x 10(-41) at 90% confidence for 60 and 8.6 GeV/c(2) WIMPs, respectively. This improves the previous CDMS II result by a factor of 2.4 (2.7) for 60 (8.6) GeV/c(2) WIMPs.
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