Cargando…
Electroweak baryogenesis at high wall velocities
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...
Autores principales: | , |
---|---|
Lenguaje: | eng |
Publicado: |
2020
|
Materias: | |
Acceso en línea: | https://dx.doi.org/10.1103/PhysRevD.101.063525 http://cds.cern.ch/record/2705720 |
_version_ | 1780964830182637568 |
---|---|
author | Cline, James M. Kainulainen, Kimmo |
author_facet | Cline, James M. Kainulainen, Kimmo |
author_sort | Cline, James M. |
collection | CERN |
description | 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. |
id | cern-2705720 |
institution | Organización Europea para la Investigación Nuclear |
language | eng |
publishDate | 2020 |
record_format | invenio |
spelling | cern-27057202023-10-04T07:45:20Zdoi:10.1103/PhysRevD.101.063525http://cds.cern.ch/record/2705720engCline, James M.Kainulainen, KimmoElectroweak baryogenesis at high wall velocitieshep-phParticle Physics - Phenomenologyastro-ph.COAstrophysics and AstronomyIt 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.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 VEV-insertion formalism.arXiv:2001.00568CERN-TH-2019-227oai:cds.cern.ch:27057202020-01-02 |
spellingShingle | hep-ph Particle Physics - Phenomenology astro-ph.CO Astrophysics and Astronomy Cline, James M. Kainulainen, Kimmo Electroweak baryogenesis at high wall velocities |
title | Electroweak baryogenesis at high wall velocities |
title_full | Electroweak baryogenesis at high wall velocities |
title_fullStr | Electroweak baryogenesis at high wall velocities |
title_full_unstemmed | Electroweak baryogenesis at high wall velocities |
title_short | Electroweak baryogenesis at high wall velocities |
title_sort | electroweak baryogenesis at high wall velocities |
topic | hep-ph Particle Physics - Phenomenology astro-ph.CO Astrophysics and Astronomy |
url | https://dx.doi.org/10.1103/PhysRevD.101.063525 http://cds.cern.ch/record/2705720 |
work_keys_str_mv | AT clinejamesm electroweakbaryogenesisathighwallvelocities AT kainulainenkimmo electroweakbaryogenesisathighwallvelocities |