论文标题
对原始黑洞的暗物质歼灭的限制改善了
Improved Constraints on Dark Matter Annihilations Around Primordial Black Holes
论文作者
论文摘要
宇宙学可能会引起粒子暗物质和原始黑孔（PBH）的明显种群，并提供了质量密度的合并，从而提供了观察性推断的值$ω_ {\ rm dm dm} \ of tocy y of。但是，先前的研究强调，粒子暗物质和PBH的场景被$γ$ - 射线限制的粒子暗物质限制，具有速度独立的热交叉部分$ \langleσv\langleσv\ rangle \ sim3 \ sim3 \ sim3 \ sim3 \ times10^{ - 26} { - 26} {\ rm cm cm cm cm}^3/cass for cass for as classic for as classiate for as classiate for as classiate for as caslaind as as cland as and as as} $ s}。在这里，我们将这些现有研究扩展到$ s $ - 灭绝的粒子暗物质，以确定差异$γ$的限制 - 依赖速度依赖的歼灭，$ \langleσv\ rangle \ rangle \ rangle \ propto v^2 $或$ d $ d $ d $ \ langlet propto to $ \ langled $ fimy ving^4约束。此外，我们强调的是，即使冻结过程为$ p $ - 波 - （循环/相空间）抑制$ s $ - 波过程相对常见，实际上可以为实验限制的$γ$ ray-ray-ray rux从pbh halo中提供主要贡献。这项工作还涉及对PBH暗物质密度概况的精致处理，并概述了半乳酸外$γ$ ray边界的应用。
Cosmology may give rise to appreciable populations of both particle dark matter and primordial black holes (PBH) with the combined mass density providing the observationally inferred value $Ω_{\rm DM}\approx0.26$. However, previous studies have highlighted that scenarios with both particle dark matter and PBH are strongly excluded by $γ$-ray limits for particle dark matter with a velocity independent thermal cross section $\langleσv\rangle\sim3\times10^{-26}{\rm cm}^3/{\rm s}$, as is the case for classic WIMP dark matter. Here we extend these existing studies on $s$-wave annihilating particle dark matter to ascertain the limits from diffuse $γ$-rays on velocity dependent annihilations which are $p$-wave with $\langleσv \rangle\propto v^2$ or $d$-wave with $\langleσv \rangle\propto v^4$, which we find to be considerably less constraining. Furthermore, we highlight that even if the freeze-out process is $p$-wave it is relatively common for (loop/phase-space) suppressed $s$-wave processes to actually provide the leading contributions to the experimentally constrained $γ$-ray flux from the PBH halo. This work also utilyses a refined treatment of the PBH dark matter density profile and outlines an improved application of extra-galactic $γ$-ray bounds.
