Large Gravitational Wave Background Signals in Electroweak Baryogenesis Scenarios

The bubble wall velocity in an electroweak first order phase transition is a key quantity both for electroweak baryogenesis and for the production of a stochastic background of gravitational waves that may be probed in the future through gravitational wave experiments like LISA or BBO. We show that,...

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Bibliographic Details
Published inarXiv.org
Main Author No, Jose M
Format Paper Journal Article
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 02.11.2011
Subjects
Baryons
Cosmology
Fluid dynamics
Fluid flow
Gravitation
Gravitational waves
Hydrodynamics
Phase transitions
Physics - Cosmology and Nongalactic Astrophysics
Physics - High Energy Physics - Phenomenology
Universe
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Summary:The bubble wall velocity in an electroweak first order phase transition is a key quantity both for electroweak baryogenesis and for the production of a stochastic background of gravitational waves that may be probed in the future through gravitational wave experiments like LISA or BBO. We show that, contrary to the conclusion drawn from previous studies, it is actually possible to generate a potentially large gravitational wave signal while satisfying the requirements for viable electroweak baryogenesis, once the effects of the hydrodynamics of bubble growth are taken into account. Then, the observation of a large gravitational wave background from the electroweak phase transition would not necessarily rule out electroweak baryogenesis as the mechanism having generated the observed baryon asymmetry of the universe.
ISSN:2331-8422
DOI:10.48550/arxiv.1103.2159