论文标题
原始黑洞的自我互动暗物质
Self-interacting Dark Matter from Primordial Black Holes
论文作者
论文摘要
原始黑洞（PBH）的蒸发范围从$ \ sim 10^{ - 1} $到$ \ sim 10^9 $ g可以产生整个观察到的暗物质（DM）遗物密度。通常假定在生产后，其丰度冻结并保持恒定。但是，黑暗部门中的热化和数量变化的过程可能会产生很大的影响，特别是增加了多个数量级的DM人群。在这里，我们估计了一般论点（例如能量和熵的保护）的提升，独立于黑暗部门的潜在粒子物理细节。可以强调的两个主要后果：$ i）$随着DM丰度增加，需要较小的PBH初始能量密度。 $ ii）$在黑暗区域中的热化降低了平均DM动能，从结构形成并因此使束缚的结合放松，从而使keV球场中的质量具有质量。
The evaporation of primordial black holes (PBH) with masses ranging from $\sim 10^{-1}$ to $\sim 10^9$ g could have generated the whole observed dark matter (DM) relic density. It is typically assumed that after being produced, its abundance freezes and remains constant. However, thermalization and number-changing processes in the dark sector can have a strong impact, in particular enhancing the DM population by several orders of magnitude. Here we estimate the boost from general arguments such as the conservation of energy and entropy, independently from the underlying particle physics details of the dark sector. Two main consequences can be highlighted: $i)$ As the DM abundance is increased, a smaller initial energy density of PBHs is required. $ii)$ Thermalization in the dark sector decreases the mean DM kinetic energy, relaxing the bound from structure formation and hence, allowing light DM with mass in the keV ballpark.
