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Primordial black holes (PBHs) may be part of the dark matter. It is shown here that PBHs form more easily during cosmic phase transitions. For approximately scale-invariant primordial curvature fluctuations the PBH mass function may therefore leave a record of the thermal history of the early Universe. In particular a peak is expected on the \(1.9 M_{\odot }\) scale due to the cosmic QCD transition.

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Primordial Black Hole Formation During Cosmic Phase Transitions

  • 章节

  • 发表日期：

    2025年

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  • Karsten Jedamzik

摘要

Primordial black holes (PBHs) may be part of the dark matter. It is shown here that PBHs form more easily during cosmic phase transitions. For approximately scale-invariant primordial curvature fluctuations the PBH mass function may therefore leave a record of the thermal history of the early Universe. In particular a peak is expected on the \(1.9 M_{\odot }\) scale due to the cosmic QCD transition.