arXiv 2006.119072020-06astro-ph.COgr-qchep-th

真空泡II形成原初黑洞

Primordial black hole formation by vacuum bubbles II

Heling Deng

备注：: 28 pages, 5 figures
DOI：: 10.1088/1475-7516/2020/09/023

摘要：

近年来，LIGO/Virgo黑洞的发现为原生黑洞的研究注入了新的活力。在这项工作中，我们研究了一种机制，原始黑洞形成的真空泡，通过量子隧穿膨胀过程中随机成核。在膨胀之后，这些气泡通常以大的洛伦兹因子进入周围辐射流体。在我们以前的工作中，我们假设气泡场与标准模型粒子强耦合，使得气泡壁是不可渗透的。在这里，我们通过考虑气泡仅通过重力与流体相互作用来完成这幅图。通过研究几种极限下的情况，我们发现黑洞可以在亚临界或超临界状态下形成。根据模型参数的不同，所得到的黑洞的质量谱可能很宽或很窄，可能会出现两个被大质量范围分开的峰。这些黑洞具有不同的光谱，可能解释了LIGO/Virgo黑洞、超大质量黑洞，并可能在暗物质中发挥重要作用。

英文摘要：

The discoveries of LIGO/Virgo black holes in recent years have revitalized the study of primordial black holes. In this work, we investigate a mechanism where primordial black holes are formed by vacuum bubbles that randomly nucleate during inflation through quantum tunneling. After inflation, these bubbles typically run into the ambient radiation fluid with a large Lorentz factor. In our previous work, we assumed the bubble fields are strongly coupled to the standard model particles so that the bubble wall is impermeable. Here we complete this picture by considering bubbles interacting with the fluid only through gravity. By studying the scenario in several limits, we found that black holes could form in either subcritical or supercritical regime. Depending on the model parameters, the resulting mass spectrum of the black holes could be wide or narrow, and may develop two peaks separated by a large mass range. With different spectra, these black holes may account for the LIGO/Virgo black holes, supermassive black holes, and may play an important role in dark matter.

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