Primordial Black Holes Formation Beyond the Standard Cosmic QCD Transition
Ma\"el Gonin, Oleksii Ivanytskyi, David Blaschke, G\"unther Hasinger
TL;DR
This paper reviews how phase transitions, especially the QCD transition, influence primordial black hole formation and their potential as dark matter candidates, considering physics beyond the Standard Model.
Contribution
It highlights the impact of cosmological phase transitions and beyond Standard Model physics on primordial black hole formation and their role as dark matter.
Findings
Phase transitions affect PBH formation probabilities.
PBHs could explain dark matter and black-hole merger events.
Beyond Standard Model physics modifies the cosmic equation of state.
Abstract
We review the role of primordial black holes (PBHs) for illuminating the dark ages of the cosmological evolution and as dark matter (DM) candidates. We elucidate the role of phase transitions for primordial black hole formation in the early Universe and focus our attention on the cosmological QCD phase transition within a recent microscopical model. We explore the impact of physics beyond the Standard Model (SM) on the cosmic equation of state and the probability distribution for the formation of PBHs which serve as candidates for DM and contribute to present-day binary black-hole merger events.
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