Advancing gravitational wave predictions from cosmological first-order phase transitions

Bubble wall dynamics and the electroweak phase transition

27 Aug 2025, 09:15

45m

4/3-006 - TH Conference Room (CERN)

Intermediate scales

Speaker

Carlo Branchina (Università della Calabria)

Description

The dynamics of of the electroweak phase transition has profound implications for cosmology and particle physics, and is governed by the density perturbations generated by the expanding bubble. A precise determination of this dynamics, and in particular of the bubble wall velocity, is crucial to assess the experimental signatures of the transition. In this talk, I will report on recent advances in the quantitative theoretical description of bubble dynamics, and, adopting typical benchmark models, present numerical results for the wall velocity and the profiles that describe the phase transition dynamics. A near-universal behaviour across models will emerge and be discussed.