2-6 September 2019
Europe/Zurich timezone

Vorticity, kinetic energy, and suppressed gravitational wave production in strong first order phase transitions

5 Sep 2019, 16:40
20m

Speaker

Mr Daniel Cutting (University of Sussex)

Description

Although in the Standard Model the electroweak phase transition is a crossover, many well-motivated extensions can generate a first-order phase transition at the electroweak scale. For a sufficiently strong phase transition, LISA would be able to observe gravitational waves sourced by plasma motion generated by expanding and colliding bubbles. While numerical simulations have examined ‘weak’ and ‘intermediate’ strength phase transitions, we conduct the first 3-dimensional simulations of strong first-order thermal phase transitions in the early Universe. We examine two types of transition, deflagrations and detonations. Detonations in strong transitions behave similarly to their weak and intermediate counterparts. In deflagrations, substantial vorticity is generated, hot droplets form, and the gravitational wave signal is reduced compared to previous models.

Primary authors

Mr Daniel Cutting (University of Sussex) Dr David Weir (University of Nottingham, University of Helsinki) Prof. Mark Hindmarsh (University of Sussex, University of Helsinki)

Presentation Materials