论文标题
暗物质的间接信号可能会根据您的位置而改变
Indirect Signals of Dark Matter Can Change Depending on Where You Look
论文作者
论文摘要
我们建议，暗物质（DM）间接信号的性质取决于它们起源的银河环境。我们在模型中证明了这种可能性，在该模型中，DM将其分支级分的光介体歼灭，其分支含量取决于普通物质产生的远距离力。特别是，DM的电磁信号只能出现在普通物质密度及其天体物理背景水平的星系中心附近。我们简要讨论了我们的模型如何解释银河中心伽玛射线过量，而无需在矮小的环境中留下很多痕迹，例如矮球星系。间接信号的类似空间依赖性也可以应用于具有亚稳态DM衰减的型号中。
We propose that the nature of indirect signals of dark matter (DM) can depend on the Galactic environment they originate from. We demonstrate this possibility in models where DM annihilates into light mediators whose branching fractions depend on a long range force sourced by ordinary matter. In particular, electromagnetic signals of DM may only arise near the centers of galaxies where the ordinary matter densities, and hence astrophysical background levels, are high. We briefly discuss how our model could explain the Galactic Center gamma ray excess, without leaving much of a trace in baryon-poor environments, like dwarf spheroidal galaxies. Similar spatial dependence of indirect signals can also apply to models featuring metastable DM decay into light mediators.
