Particle production by the expanding thin-walled bubble

TL;DR

This paper evaluates the spectrum of particles produced during the expansion of a thin-walled bubble, emphasizing the dominant role of the expanding bubble in particle creation, while neglecting nucleation effects.

Contribution

It introduces a calculation of particle production during bubble expansion in the thin-wall approximation, highlighting the bubble's dominant contribution.

Findings

Expanding thin-walled bubbles produce significant particle spectra.

Particle production is dominated by the bubble expansion phase.

Nucleation effects are neglected in this analysis.

Abstract

Neglecting the effect of particle production at the moment of bubble nucleation, the spectrum of created particles during the bubble expansion is evaluated in the thin-wall approximation. It is shown that the expanding thin-walled bubble makes the dominant contribution to the particle production.