Lower bound on the electroweak wall velocity from hydrodynamic instability

Journal Article · Fri Mar 27 00:00:00 EDT 2015 · Journal of Cosmology and Astroparticle Physics

DOI:https://doi.org/10.1088/1475-7516/2015/03/051· OSTI ID:22454533

Mégevand, Ariel; Membiela, Federico Agustín; Sánchez, Alejandro D. ^[1]

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1. IFIMAR (CONICET-UNMdP), Departamento de Física, Facultad de Ciencias Exactas y Naturales, Universidad Nacional de Mar del Plata, Deán Funes (7600) 3350 Mar del Plata (Argentina)

The subsonic expansion of bubbles in a strongly first-order electroweak phase transition is a convenient scenario for electroweak baryogenesis. For most extensions of the Standard Model, stationary subsonic solutions (i.e., deflagrations) exist for the propagation of phase transition fronts. However, deflagrations are known to be hydrodynamically unstable for wall velocities below a certain critical value. We calculate this critical velocity for several extensions of the Standard Model and compare with an estimation of the wall velocity. In general, we find a region in parameter space which gives stable deflagrations as well as favorable conditions for electroweak baryogenesis.

• Sponsoring Organization: SCOAP3, CERN, Geneva (Switzerland)
• OSTI ID: 22454533
• Journal Information: Journal of Cosmology and Astroparticle Physics, Vol. 2015, Issue 03; Other Information: PUBLISHER-ID: JCAP03(2015)051; OAI: oai:repo.scoap3.org:9749; Article funded by SCOAP3. Content from this work may be used under the terms of the Creative Commons Attribution 3.0 License. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.; Country of input: International Atomic Energy Agency (IAEA); ISSN 1475-7516
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ASYMMETRY
COSMOLOGY
CRITICAL VELOCITY
GRAVITATIONAL WAVES
INSTABILITY
MATHEMATICAL SOLUTIONS
MATHEMATICAL SPACE
PHASE TRANSFORMATIONS
STANDARD MODEL