WIMPs and stellar-mass primordial black holes are incompatible
WIMPs and stellar-mass primordial black holes are incompatible
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DOI：
10.1103/physrevd.100.023506
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发表时间：
2019-07-09
影响因子：
5
通讯作者：
Hotchkiss, Shaun
中科院分区：
文献类型：
--
作者：
Adamek, Julian;Byrnes, Christian T.;Hotchkiss, Shaun
我们最近表明，假设的具有陡峭密度分布的超紧凑迷你光晕在具有增强的初始扰动的现实模拟中不会形成。在本文中，我们假设一小部分暗物质由原初黑洞（PBH）组成，并模拟它们周围结构的形成。我们发现，在这种情况下，确实会形成具有陡峭密度分布的光晕，这与理论预测一致。如果暗物质的其余部分由弱相互作用的大质量粒子（WIMP）组成，我们还表明，PBH 周围光晕最内部致密部分的 WIMP 会湮灭并产生可检测的伽马射线信号。未检测到该信号意味着 PBH 最多占暗物质的十亿分之一，前提是它们的质量大于太阳质量的百万分之一。同样，探测到 PBH 意味着剩余的暗物质不可能是 WIMP。
We recently showed that postulated ultracompact minihalos with a steep density profile do not form in realistic simulations with enhanced initial perturbations. In this paper we assume that a small fraction of the dark matter consists of primordial black holes (PBHs) and simulate the formation of structures around them. We find that in this scenario halos with steep density profiles do form, consistent with theoretical predictions. If the rest of the dark matter consists of weakly interacting massive particles (WIMPs), we also show that WIMPs in the dense innermost part of halos surrounding the PBH would annihilate and produce a detectable gamma-ray signal. The nondetection of this signal implies that PBHs make up at most one billionth of the dark matter, provided that their mass is greater than one millionth of the mass of the Sun. Similarly, a detection of PBHs would imply that the remaining dark matter could not be WIMPs.