Electroweak baryogenesis at high bubble wall velocities
Cline, J. M., & Kainulainen, K. (2020). Electroweak baryogenesis at high bubble wall velocities. Physical Review D, 101(6), Article 063525. https://doi.org/10.1103/PhysRevD.101.063525
Published inPhysical Review D
© Authors, 2020
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.
PublisherAmerican Physical Society
Publication in research information system
MetadataShow full item record
Related funder(s)Academy of Finland
Funding program(s)Academy Project, AoF
Additional information about fundingThis work was supported by the Academy of Finland Grant No. 318319 and NSERC (Natural Sciences and Engineering Research Council, Canada).
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