Hydrodynamical constraints on the bubble wall velocity
Tomasz Krajewski, Marek Lewicki, Mateusz Zych
Abstract
The authors use numerical lattice simulations to study bubble nucleation in cosmological phase transitions. The terminal bubble velocity is an important parameter for the primordial gravitational wave spectrum as well as for electroweak (EW) baryogenesis. They are able to study an extreme parameter space that is the most promising for these phenomena. However, they find a hydrodynamical obstruction that creates a velocity gap that excludes the most promising models for EW baryogenesis, making it improbable to contribute to the solution of the baryon asymmetry problem.
Topics & Concepts
BaryogenesisPhysicsBubbleParameter spaceElectroweak interactionAsymmetryBaryon asymmetryClassical mechanicsBaryonLattice (music)Terminal velocityMechanicsParticle physicsQuantum mechanicsElectronAcousticsStatisticsLeptonMathematicsCosmology and Gravitation TheoriesPulsars and Gravitational Waves ResearchComputational Physics and Python Applications