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arXiv 0912.3592astro-ph.COhep-ex
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CDMS II实验的最终暴露结果

Results from the Final Exposure of the CDMS II Experiment

The CDMS Collaboration, Z. Ahmed

摘要:

我们报告的结果,从一个盲分析的最终数据与低温暗物质搜索实验(CDMS II)在苏丹地下实验室,明尼苏达州,美国。本工作分析了612 kg-天的总原始暴露量。我们在信号区域观察到两个事件;根据我们的背景估计,观察到两个或更多背景事件的概率为23%。在90%的置信水平下,这些数据为质量为70 GeV/c^2的弱相互作用大质量粒子(WIMP)-核子弹性散射自旋无关截面设定了7.0 × 10 ^{-44} cm ^2的上限。将这个结果与CDMS II之前的所有数据结合起来,得出质量为70 GeV/c^2的WIMP与核子自旋无关截面的上限为3.8 × 10 ^{-44} cm ^2。我们还排除了新的参数空间,最近提出的非弹性暗物质模型。

英文摘要:

We report results from a blind analysis of the final data taken with the Cryogenic Dark Matter Search experiment (CDMS II) at the Soudan Underground Laboratory, Minnesota, USA. A total raw exposure of 612 kg-days was analyzed for this work. We observed two events in the signal region; based on our background estimate, the probability of observing two or more background events is 23%. These data set an upper limit on the Weakly Interacting Massive Particle (WIMP)-nucleon elastic-scattering spin-independent cross-section of 7.0x10^{-44} cm^2 for a WIMP of mass 70 GeV/c^2 at the 90% confidence level. Combining this result with all previous CDMS II data gives an upper limit on the WIMP-nucleon spin-independent cross-section of 3.8x10^{-44} cm^2 for a WIMP of mass 70 GeV/c^2. We also exclude new parameter space in recently proposed inelastic dark matter models.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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