Science. 2010 Mar 26;327(5973):1619-21. doi: 10.1126/science.1186112. Epub 2010 Feb 11.
Astrophysical observations indicate that dark matter constitutes most of the mass in our universe, but its nature remains unknown. Over the past decade, the Cryogenic Dark Matter Search (CDMS II) experiment has provided world-leading sensitivity for the direct detection of weakly interacting massive particle (WIMP) dark matter. The final exposure of our low-temperature germanium particle detectors at the Soudan Underground Laboratory yielded two candidate events, with an expected background of 0.9 +/- 0.2 events. This is not statistically significant evidence for a WIMP signal. The combined CDMS II data place the strongest constraints on the WIMP-nucleon spin-independent scattering cross section for a wide range of WIMP masses and exclude new parameter space in inelastic dark matter models.
天体物理观测表明，暗物质构成了我们宇宙中大部分的质量，但它的性质仍然未知。在过去的十年中，低温暗物质搜索（CDMS II）实验为直接探测弱相互作用大质量粒子（WIMP）暗物质提供了世界领先的灵敏度。我们在苏德恩地下实验室的低温锗粒子探测器的最终曝光产生了两个候选事件，预期背景为 0.9 +/- 0.2 个事件。这在统计学上并不是暗物质粒子探测卫星信号的显著证据。低温暗物质搜索（CDMS II）实验的数据对广泛的暗物质质量范围内的暗物质-核子自旋无关散射截面施加了最强的限制，并排除了非弹性暗物质模型中的新参数空间。
