CDMS-II实验的最新结果
Recent results from the CDMS-II experiment
摘要:
低温暗物质搜索实验(CDMS)采用低温Ge和Si探测器,通过它们与靶核的弹性散射相互作用来探测WIMP。当前对397.8千克-天Ge暴露的分析导致零个观察到的候选事件,在90%置信水平下,对于60 GeV的WIMP质量,自旋无关的WIMP-核子截面的上限为6.6 x 10 ^{-44} cm ^2(当包括先前的CDMS Soudan数据时为4.6 x 10^{-44} cm ^2)。为了提高灵敏度,已经开发了新的一英寸厚的探测器,将用于超级CDMS阶段。SuperCDMS 25 kg将在SNOLAB运行,预期对自旋无关的WIMP-核子弹性散射截面的灵敏度为1 x 10^{-45} cm ^2。
英文摘要:
The Cryogenic Dark Matter Search experiment (CDMS) employs low-temperature Ge and Si detectors to detect WIMPs via their elastic scattering interaction with the target nuclei. The current analysis of 397.8 kg-days Ge exposure resulted in zero observed candidate events, setting an upper limit on the spin-independent WIMP-nucleon cross-section of 6.6 x 10^{-44} cm^2 (4.6 x 10^{-44} cm^2, when previous CDMS Soudan data is included) at the 90 % confidence level for a WIMP mass of 60 GeV. To increase the sensitivity, new one inch thick detectors have been developed which will be used in the SuperCDMS phase. SuperCDMS 25kg will be operated at SNOLAB with an expected sensitivity on the spin-independent WIMP-nucleon elastic scattering cross-section of 1 x 10^{-45} cm^2.
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