6533b7d4fe1ef96bd12634c9
RESEARCH PRODUCT
Electroweak baryogenesis at high bubble wall velocities
James M. ClineKimmo Kainulainensubject
PhysicsPhase transitionleptogenesis010308 nuclear & particles physicsGravitational waveBubbleastrofysiikkaElectroweak interactionHigh Energy Physics::Phenomenologybaryogenesishiukkasfysiikkakosmologia01 natural sciences114 Physical sciencesBaryogenesisPhysics::Fluid DynamicsBaryon asymmetryQuantum electrodynamicsSpeed of sound0103 physical sciences010306 general physicsVacuum expectation valuedescription
It is widely believed that electroweak baryogenesis should be suppressed in strong phase transitions with fast-moving bubble walls, but this effect has never been quantitatively studied. We rederive fluid equations describing transport of particle asymmetries near the bubble wall without making the small-wall-velocity approximation. We show that the suppression of the baryon asymmetry is a smooth function of the wall speed and that there is no special behavior when crossing the sound speed barrier. Electroweak baryogenesis can thus be efficient also with strong detonations, generically associated with models with observably large gravitational waves. We also make a systematic and critical comparison of our improved transport equations to another one commonly used in the literature, based on the vacuum expectation value (VEV)-insertion formalism. Peer reviewed
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2020-03-20 |