包含光子谱下暗物质模型的强优化保守Fermi-LAT约束
Strong Optimized Conservative Fermi-LAT Constraints on Dark Matter Models from the Inclusive Photon Spectrum
摘要：
我们设置了保守的，强大的约束条件的湮灭和衰变的暗物质到各种标准模型的最终状态下的银河系晕中的暗物质的分布的各种假设。我们使用费米伽马射线太空望远镜通过其主要仪器大面积望远镜（LAT）观察到的包容性光子光谱。我们使用模拟数据，首先找到“最佳”的伽玛射线天空中的感兴趣的区域，预期的暗物质信号是最大的预期天体物理前景相比。然后，我们要求预测的暗物质信号小于先验最佳区域中观察到的光子计数。这产生了一个非常保守的约束，因为我们不试图建模或减去天体物理前景。由此产生的限制是竞争与其他现有的限制，并与尖状暗物质分布在银河系中心区域的一些最终状态，不利于典型的截面冻结期间所需的弱相互作用大质量粒子（WIMP），以获得所观察到的遗迹丰度。
英文摘要：
We set conservative, robust constraints on the annihilation and decay of dark matter into various Standard Model final states under various assumptions about the distribution of the dark matter in the Milky Way halo. We use the inclusive photon spectrum observed by the Fermi Gamma-ray Space Telescope through its main instrument, the Large-Area Telescope (LAT). We use simulated data to first find the "optimal" regions of interest in the gamma-ray sky, where the expected dark matter signal is largest compared with the expected astrophysical foregrounds. We then require the predicted dark matter signal to be less than the observed photon counts in the a priori optimal regions. This yields a very conservative constraint as we do not attempt to model or subtract astrophysical foregrounds. The resulting limits are competitive with other existing limits, and, for some final states with cuspy dark-matter distributions in the Galactic Center region, disfavor the typical cross section required during freeze-out for a weakly interacting massive particle (WIMP) to obtain the observed relic abundance.
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