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Abstract |
Cosmological first-order phase transitions are said strongly supercooled when the
nucleation temperature is much smaller than the critical temperature. They are
typical of potentials which feature nearly scale-invariance, for which the bounce
action decreases only logarithmically with time. The phase transition takes place
slowly and the probability distribution of bubble nucleation time is maximally
spread. Hubble patches which get percolated later than the average are hotter than
the background after reheating and potentially collapse into black holes. We
discuss the formation of primordial black hole by supercooled first-order phase
transitions and we present two classes of particle physics models predicting such
transitions. |
