IberiCos 2025

Session

Session 1 - Phase Transitions & Topological Defects

14 Apr 2025, 10:15

Auditorium C.1

Conveners

Session 1 - Phase Transitions & Topological Defects

• Session convener: Carlos Martins

58. Gravitational Waves from compressional and vortical modes in strong first order phase transitions

José Ricardo Correia

14/04/2025, 10:15

Talk

Multiple extensions of the Standard Model of particle physics predict the existence of first order phase transitions occurring in the early Universe, leading to an imprint in the stochastic background of gravitational waves. When the transition occurs at the electroweak scale, this imprint will be in the expected range of LISA.
In this talk we explore the gravitational wave production of...

42. Gravitational waves from a curvature-induced phase transition of a Higgs-portal dark matter sector

Dr Andreas Mantziris (University of Porto)

14/04/2025, 10:30

Talk

Our latest study (2407.18845) investigates the possibility of generating gravitational waves (GWs) from a curvature-induced phase transition of a non-minimally coupled scalar field acting as dark matter, with a portal interaction to the Higgs field. This analysis is conducted within a dynamical spacetime framework, specifically during the transition from inflation to kination, while also...

48. Catastrophic events in domain wall evolution

Daniel Jiménez Aguilar (Tufts University)

14/04/2025, 10:45

Talk

The collapse of domain wall networks in the early universe could have left observable signatures in the form of gravitational waves and primordial black holes. This motivates a detailed study of the dynamics of these topological defects. In this talk, I will discuss how their effective description can predict singularities in the worldvolume of the walls and how this catastrophic evolution is...