Gravitational waves and black holes from the phase transition in models of dynamical symmetry breaking

Arteaga M.; Ghoshal A.; Strumia A. · Journal of Cosmology and Astroparticle Physics (2025) · DOI: 10.1088/1475-7516/2025/05/029

Resumen

Theories of dynamical electroweak symmetry breaking predict a strong first order cosmological phase transition: we compute the resulting signals, primordial black holes and gravitational waves. These theories employ one SM-neutral scalar, plus some extra model-dependent particle to get the desired quantum potential out of classical scale invariance. We consider models where the extra particle is a scalar singlet, or vectors of an extended U(1) or SU(2) gauge sector. In models where the extra particle is stable, it provides a particle Dark Matter candidate with freeze-out abundance that tends to dominate over primordial black holes. These can instead be DM in models without a particle DM candidate. Gravitational waves arise at a level observable in future searches, even in regions where DM cannot be directly tested.

Instituciones: Universidad Privada del Norte