With the discovery of gravitational waves from merging pairs of massive black holes, the interest in the question of whether Primordial Black Holes (PBHs) could constitute the Dark Matter (DM) has recently been revived. I will review the different mechanisms for (DM) PBHs formation with a focus on inflation which can source the required large density fluctuations for PBHs formation. I will also explain the excursion set theory as a new formalism for the formation of DM PBHs.

中文翻译：

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原始黑洞及其形成

随着合并成对的大质量黑洞而发现引力波，人们对“原始黑洞（PBH）是否可以构成暗物质（DM）”这一问题的兴趣近来得到了恢复。我将回顾（DM）PBHs形成的不同机制，重点是通货膨胀，它可以为PBHs形成提供所需的较大密度波动。我还将解释偏移集理论，将其作为DM PBH形成的新形式主义。