Cambridge High Energy Workshop 2022 - Phase Transitions and Topological Defects in the Early Universe

Session

Theoretical Developments - Gravitational waves

3 Aug 2022, 09:30

Center of Mathematical Sciences and Applications (CMSA), Harvard University

14. Gravitational waves from metastable cosmic strings

Kai Schmitz (CERN)

03/08/2022, 09:30

Cosmic strings are predicted by many Standard Model extensions involving the cosmological breaking of an Abelian symmetry and represent a potential source of primordial gravitational waves (GWs). In many Grand Unified Theories (GUTs), cosmic strings especially turn out to be metastable, as the nucleation of GUT monopoles along strings after a finite lifetime eventually leads to the collapse of...

15. Effective field theory for cosmological phase transitions

Oliver Gould (Nottingham U.)

03/08/2022, 10:00

Phase transitions are driven by thermal loop fluctuations, which modify background fields at leading order. This breaks the loop expansion and leads to large theoretical uncertainties in typical calculations, especially for gravitational wave predictions. I will give an overview of our present understanding of these uncertainties, and of the tools that have been developed to overcome them....

27. The Rocket Science of Expanding Bubbles

Isabel Garcia Garcia (KITP)

03/08/2022, 10:30