Bosons trapped in false-vacuum remnants of a dark first-order phase transition can form Q-balls that collapse into primordial black holes, producing correlated gravitational-wave and gamma-ray signals.
Semi-analytic techniques for calculating bubble wall profiles
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abstract
We present semi-analytic techniques for finding bubble wall profiles during first order phase transitions with multiple scalar fields. Our method involves reducing the problem to an equation with a single field, finding an analytic solution and perturbing around it. The perturbations can be written in a semi-analytic form. We argue that our technique lacks convergence problems and demonstrate the speed of convergence on an example potential.
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Primordial black holes from Q-balls produced in a first-order phase transition
Bosons trapped in false-vacuum remnants of a dark first-order phase transition can form Q-balls that collapse into primordial black holes, producing correlated gravitational-wave and gamma-ray signals.