论文标题
来自电源偶极子的吸烟枪，用于黑暗部门的弹性相互作用
A smoking gun from the power spectrum dipole for elastic interactions in the dark sector
论文作者
论文摘要
已证明在黑暗扇区中具有纯动量交换的模型提供了一种有希望的场景，以应对从高红移和低红移探针推断出的聚类中的张力。这些模型的一个独特特征是，仅修改了暗物质成分的Euler方程，并且校正的净效应可以与由相互作用速率确定的额外摩擦相关联。在这项工作中，我们表明可以从物质功率谱的偶极子中检测到$σ_8$张力所需的相互作用参数的强度，该偶极性预计将在即将进行的调查中测量。
Models with pure momentum exchange in the dark sector have been shown to provide a promising scenario to tackle the tension in the clustering inferred from high- and low-redshift probes. A distinctive feature of these models is that only the Euler equation for the dark matter component is modified and the correction is such that the net effect can be associated to an additional friction determined by the interaction rate. In this work, we show that the strength of the interaction parameter needed to resolve the $σ_8$ tension could be detected from the dipole of the matter power spectrum that is expected to be measured in upcoming surveys.
