Effect of reheating on electroweak baryogenesis

Abstract

The latent heat released during the expansion of bubbles in the electroweak phase transition reheats the plasma and causes the bubble growth to slow down. This decrease of the bubble wall velocity affects the result of electroweak baryogenesis. Since the efficiency of baryogenesis peaks for a wall velocity $\sim 10^{-2}$, the resulting baryon asymmetry can either be enhanced or suppressed, depending on the initial value of the wall velocity. We calculate the evolution of the phase transition taking into account the release of latent heat. We find that, although in the SM the baryon production is enhanced by this effect, in the MSSM it causes a suppression to the final baryon asymmetry.

4 pages, 3 figures. References added. Revised version to be published in Phys.Rev.D

References in corpus (8)

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• Detonations and deflagrations in cosmological phase transitions
• Supercooling and phase coexistence in cosmological phase transitions
• Spherical and non-spherical bubbles in cosmological phase transitions
• Energy budget and the gravitational wave spectra beyond the bag model
• Gravitational waves from deflagration bubbles in first-order phase transitions
• Two phase reheating: CMB constraints on inflaton and dark matter phenomenology
• Friction forces on phase transition fronts
• Generation of baryon inhomogeneities in the electroweak phase transition
• First-order cosmological phase transitions in the radiation dominated era
• Stability of cosmological deflagration fronts
• Stability of cosmological detonation fronts
• Lower bound on the electroweak wall velocity from hydrodynamic instability
• Bubble nucleation and growth in slow cosmological phase transitions
• Analytic approach to the motion of cosmological phase transition fronts
• Dark energy from coexistence of phases
• Bubble wall correlations in cosmological phase transitions
• Particle-antiparticle oscillation modes crossing horizon: baryogenesis and dark-matter waves