2012/12/31 by Maxim Dvornikov, V. B. Semikoz, Victor B. Semikoz
Physics and Astronomy · #Cosmology and Gravitation Theories #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #astro-ph.CO #hep-ph
paper · pdf · doi:10.1103/physrevd.87.025023
published as Physical Review D 87, 025023 (2013) · 12 pages, two columns, Revtex4.1, 3 eps figures; minimal changes in the text, version accepted for publication in Phys.Rev.D
arxiv created 2013/01/08 · openalex publication_date 2013/01/22 · arxiv updated 2013/01/23 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
We study lepton asymmetry evolution in plasma of the early Universe before the electroweak phase transition (EWPT) accounting for chirality flip processes via Higgs decays (inverse decays) entering equilibrium at temperatures below TRL\ensuremath≃10 TeV, TEW<T<TRL. We solve appropriate kinetic equations for leptons and Higgs bosons taking into account the lepton number violation due to Abelian anomalies for right and left electrons and neutrinos in the self-consistent hypercharge field obeying Maxwell equations modified by the contribution of the Standard Model of electroweak interactions. The violation of left lepton numbers and the corresponding violation of the baryon number due to sphaleron processes in symmetric phase is taken into account as well. Assuming the Chern-Simons wave configuration of the seed hypercharge field, we get the estimates of baryon and lepton asymmetries evolved from the primordial right electron asymmetry existing alone as partial asymmetry at T\ensuremath≥TRL. One finds a strong dependence of the asymmetries on the Chern-Simons wave number. We predict a nonzero chiral asymmetry \ensuremathΔ\ensuremathμ=\ensuremathμ_eR\ensuremath-\ensuremathμ_eL\ensuremath≠0 in this scenario evolved down to the EWPT moment that can be used as an initial value for the Maxwellian field evolution after EWPT.