Formation of Black Holes in First Order Phase Transitions

TL;DR

This paper proposes a novel mechanism for black hole formation during first order phase transitions, where bubble wall interactions create conditions leading to collapse and black hole formation, impacting inflation model constraints.

Contribution

It introduces a new black hole formation mechanism in phase transitions via vacuum bubble collisions and explores its implications for inflationary parameters.

Findings

High probability of black hole formation from bubble collisions

Constraints on inflation models from primordial black hole spectrum

New restrictions on phase transition parameters

Abstract

A new mechanism of black hole formation in a first order phase transition is proposed. In vacuum bubble collisions the interaction of bubble walls leads to the formation of nontrivial vacuum configuration. The consequent collapse of this vacuum configuration induces the black hole formation with high probability. Observational constraints on the spectrum of primordial black holes allow to obtain new nontrivial restrictions on parameters of inflation models with first order phase transitions.