arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2007.00026gr-qcastro-ph.COastro-ph.HEhep-phhep-th
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作为暗物质的二次引力原初黑洞模拟

Primordial Black-Hole Mimicker in Quadratic Gravity as Dark Matter

Ufuk Aydemir

摘要:

我们讨论了具有原始热2-2-洞残余物作为暗物质的天体物理学和宇宙学意义。热2-2-洞在二次引力中作为相对论性热气体超紧分布的无水平经典解发散。与模仿黑洞热力学行为的大2-2-洞相反,蒸发后期的小2-2-洞表现为质量接近最小值的稳定残余物。这些残余物和所有的暗物质一样,只要形成质量和残余质量都相对较小,就能满足相应的观测约束。残余质量的参数空间是通过可能的残余合并来探测的,这些合并会产生高能天体物理粒子的强通量;高能光子和中微子数据似乎有利于普朗克质量残余,指向二次引力的量子理论的强耦合场景。另一方面,形成质量受到早期宇宙学的限制,这证明需要2-2-洞才能在大爆炸核合成之前演化成残余状态。

英文摘要:

We discuss the astrophysical and cosmological implications of having primordial thermal 2-2-hole remnants as dark matter. Thermal 2-2-holes emanate in quadratic gravity as horizonless classical solutions for ultracompact distributions of relativistic thermal gas. In contrast to a large 2-2-hole that imitates the thermodynamic behaviour of a black hole, a small 2-2-hole at late stages of evaporation behaves as a stable remnant with the mass approaching a minimal value. These remnants as all dark matter can satisfy the corresponding observational constraints provided that both the formation and remnant masses are relatively small. The parameter space for the remnant mass is probed through possible remnant mergers that would produce strong fluxes of high-energy astrophysical particles; the high-energy photon and neutrino data appear to favor towards the Planck-mass remnants, pointing to the strong-coupling scenario for the quantum theory of quadratic gravity. The formation mass, on the other hand, is constrained by the early-universe cosmology, which turns out to require 2-2-holes to evolve into the remnant state before Big Bang Nucleosynthesis.

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