Pantheon SEMPARIS Le serveur des séminaires parisiens Paris

Status Confirmed
Seminar Series LPTHE-PPH
Subjects astro-ph,hep-ph,hep-th
Date Wednesday 8 June 2022
Time 14:00
Institute LPTHE
Seminar Room Library, 4th floor
Speaker's Last Name Gouttenoire
Speaker's First Name Yann
Speaker's Email Address
Speaker's Institution Tel Aviv University
Title Primordial black holes from supercooled first-order phase transition
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.
arXiv Preprint Number

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