A1 Journal article (refereed)
Electroweak baryogenesis at high bubble wall velocities (2020)

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

JYU authors or editors

Publication details

All authors or editors: Cline, James M.; Kainulainen, Kimmo

Journal or series: Physical Review D

ISSN: 2470-0010

eISSN: 2470-0029

Publication year: 2020

Volume: 101

Issue number: 6

Article number: 063525

Publisher: American Physical Society

Publication country: United States

Publication language: English

DOI: https://doi.org/10.1103/PhysRevD.101.063525

Publication open access: Openly available

Publication channel open access: Partially open access channel

Publication is parallel published (JYX): https://jyx.jyu.fi/handle/123456789/68287

Web address of parallel published publication (pre-print): https://arxiv.org/abs/2001.00568


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.

Keywords: cosmology; particle physics; astrophysics

Free keywords: baryogenesis; leptogenesis

Contributing organizations

Related projects

  • Dark Universe
      • Kainulainen, Kimmo
    • Research Council of Finland

Ministry reporting: Yes

Reporting Year: 2020

JUFO rating: 2

Last updated on 2023-03-10 at 15:19