2–4 Jul 2025
Faculty of Law and Administration, UWr
Europe/Warsaw timezone

Primordial black-hole formation and heavy r-process element synthesis from the cosmological QCD transition. Two aspects of an inhomogeneous early Universe

3 Jul 2025, 18:00
2h
Witold Swida Lecture Hall (Faculty of Law and Administration, UWr)

Witold Swida Lecture Hall

Faculty of Law and Administration, UWr

ul. Uniwersytecka 7-10 Wrocław, Poland

Speaker

David Blaschke

Description

We review the role of primordial black holes (PBHs) for illuminating the dark ages of the cosmological evolution and as dark matter candidates. We elucidate the role of phase transitions for primordial black hole formation in the early Universe and focus our attention to the cosmological QCD phase transition within a recent microscopical model. We explore the impact of physics beyond the Standard Model on the cosmic equation of state and the probability distribution for the formation of primordial black holes which serve as dark matter (DM) candidates. We argue that besides primordial black holes also droplet-like quark-gluon plasma inhomogeneities may become gravitationally stabilized for a sufficiently long epoch to distill baryon number and form nuclear matter droplets which upon their evaporation may enrich the cosmos locally with heavy r-process elements already in the early Universe.

Authors

Presentation materials