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arXiv 1005.0579hep-phastro-ph.CO
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暗物质直接探测实验的天体物理解释

The Astrophysical Uncertainties Of Dark Matter Direct Detection Experiments

Christopher McCabe

摘要:

在暗物质直接探测实验中,研究了弹性、动量依赖和非弹性散射暗物质三种情况下天体物理不确定性对排斥限的影响。我们发现,不同的暗物质银河逃逸速度和太阳的圆周速度可以导致显着的变化,光($\lesssim10$ GeV)的弹性和非弹性散射暗物质的排斥限制。我们还计算的限制,使用100个速度分布提取的通过Lactea II和GHALO N体模拟,并发现,麦克斯韦-玻尔兹曼分布具有相同的天体物理参数通常设置较少的约束限制。对于质量为$\gtrsim50$ GeV的天体物理参数和速度分布形式的变化,弹性和动量相关的极限仍然是稳健的。

英文摘要:

The effects of astrophysical uncertainties on the exclusion limits at dark matter direct detection experiments are investigated for three scenarios: elastic, momentum dependent and inelastically scattering dark matter. We find that varying the dark matter galactic escape velocity and the Sun's circular velocity can lead to significant variations in the exclusion limits for light ($\lesssim10$ GeV) elastic and inelastic scattering dark matter. We also calculate the limits using one hundred velocity distributions extracted from the Via Lactea II and GHALO N-body simulations and find that a Maxwell-Boltzmann distribution with the same astrophysical parameters generally sets less constraining limits. The elastic and momentum dependent limits remain robust for masses $\gtrsim50$ GeV under variations of the astrophysical parameters and the form of the velocity distribution.

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