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arXiv 1208.6426hep-phastro-ph.CO
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直接探测暗物质的自旋相关结构函数的核不确定性

Nuclear uncertainties in the spin-dependent structure functions for direct dark matter detection

David G. Cerdeno, Mattia Fornasa, Ji-Haeng Huh, Miguel Peiro

摘要:

研究了核自旋相关结构函数的不确定性对直接探测实验中确定暗物质参数的影响。我们表明,不同的核模型,描述特定的目标核的自旋相关的结构功能,可以导致DM质量和散射截面的重建值的变化。我们提出了自旋结构函数的参数化,使我们能够将这些不确定性视为三个参数的变化,其中心值和偏差取决于特定的核。锗和氙探测器的曝光量为300公斤,假设一个假设的检测DM和研究的DM属性的一系列基准点的方法进行说明。我们发现,这些不确定性的影响可以是类似的振幅的天体物理学的不确定性,特别是在那些情况下,自旋相关的弹性散射截面的贡献是相当大的。

英文摘要:

We study the effect that uncertainties in the nuclear spin-dependent structure functions have in the determination of the dark matter (DM) parameters in a direct detection experiment. We show that different nuclear models that describe the spin-dependent structure function of specific target nuclei can lead to variations in the reconstructed values of the DM mass and scattering cross-section. We propose a parametrization of the spin structure functions that allows us to treat these uncertainties as variations of three parameters, with a central value and deviation that depend on the specific nucleus. The method is illustrated for germanium and xenon detectors with an exposure of 300 kg yr, assuming a hypothetical detection of DM and studying a series of benchmark points for the DM properties. We find that the effect of these uncertainties can be similar in amplitude to that of astrophysical uncertainties, especially in those cases where the spin-dependent contribution to the elastic scattering cross-section is sizable.

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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