Physics
Scientific paper
Nov 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010jphcs.259a2048s&link_type=abstract
Journal of Physics: Conference Series, Volume 259, Issue 1, pp. 012048 (2010).
Physics
1
Scientific paper
Extensions of the Standard Model are being considered as viable settings for a first-order electroweak phase transition which would satisfy Sakharov's three conditions for the generation of the baryon asymmetry of the Universe. These extensions would provide a sufficiently strong phase transition and remove the main obstacles which appear in the context of the Standard Model: A far-too-high lower bound on the Higgs mass, immediate wipeout of the newly-created baryon asymmetry and insufficient CP violation. We apply standard semiclassical treatments of the hydrodynamics of a first-order phase transition to the case of a recently-introduced dimension-6 extension of the Standard Model which (within the present bounds on the Higgs mass) could produce the observed baryon asymmetry of the Universe. We express the friction term in the hydrodynamic equations in terms of the particle content of the model and produce predictions for the velocity of the expanding bubble wall in the stationary regime.
Huber Stephan J.
Sopena Miguel
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