Baryon asymmetry from electroweak tachyonic preheating

Abstract

We consider a scenario in which the baryon asymmetry was created in the early universe during a cold electroweak transition. The spinodal instability of the Higgs field caused by a rapid change of sign of its effective mass-squared parameter induces tachyonic preheating. We study the development of Chern-Simons number in this transition by numerical lattice simulations of the SU(2)-Higgs model with an added effective CP-violating term. A net asymmetry is produced, and we study its dependence on the size of CP violation and the ratio of Higgs to W mass.

30 pages, 9 figures

References in corpus (5)

• First Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Determination of Cosmological Parameters
• Symmetry Breaking and False Vacuum Decay after Hybrid Inflation
• Chern-Simons number asymmetry from CP violation at electroweak tachyonic preheating
• W and Higgs particle distributions during electroweak tachyonic preheating
• Two-color QCD in 3D at finite baryon density

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