arXiv 1106.30142011-06astro-ph.COhep-exhep-ph

阶段II SIMPLE暗物质搜索的最终分析和结果

Final Analysis and Results of the Phase II SIMPLE Dark Matter Search

M. Felizardo, T. A. Girard, T. Morlat, A. C. Fernandes, A. R. Ramos, J. G. Marques, M. Auguste, D. Boyer, A. Cavaillou, J. Poupeney, C. Sudre, J. Puibasset, H. … 展开作者

M. Felizardo, T. A. Girard, T. Morlat, A. C. Fernandes, A. R. Ramos, J. G. Marques, M. Auguste, D. Boyer, A. Cavaillou, J. Poupeney, C. Sudre, J. Puibasset, H. S. Miley, R. F. Payne, F. P. Carvalho, M. I. Prudêncio, R. Marques

备注：: revised, PRL-accepted version with slightly weakened limit contours
DOI：: 10.1103/PhysRevLett.108.201302

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摘要：

我们报告的第二阶段SIMPLE测量的最终结果，包括两个运行阶段的15个过热液滴探测器，第二阶段包括改进的中子屏蔽。分析包括一个完善的信号分析，和修订的成核效率的基础上重新分析以前报道的单色中子辐照。在35 GeV/c^2的WIMP-质子相互作用的自旋相关部分，综合结果得到的等值线最小值为σ_{p} = 4.2 x 10^-3 pb，这是迄今为止从直接搜索实验中得到的最严格的结果，也是第一次与以前仅间接获得的结果重叠。在与自旋无关的扇区，在35 GeV/c^2处达到了最小值3.6 x 10^-6 pb，排除轮廓挑战了目前感兴趣的最近CoGeNT区域。

英文摘要：

We report the final results of the Phase II SIMPLE measurements, comprising two run stages of 15 superheated droplet detectors each, the second stage including an improved neutron shielding. The analyses includes a refined signal analysis, and revised nucleation efficiency based on reanalysis of previously-reported monochromatic neutron irradiations. The combined results yield a contour minimum of σ_{p} = 4.2 x 10^-3 pb at 35 GeV/c^2 on the spin-dependent sector of WIMP-proton interactions, the most restrictive to date from a direct search experiment and overlapping for the first time results previously obtained only indirectly. In the spin-independent sector, a minimum of 3.6 x 10^-6 pb at 35 GeV/c^2 is achieved, with the exclusion contour challenging the recent CoGeNT region of current interest.

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