Speaker
Alexander Smirnov
(IZMIRAN)
Description
We study hypermagnetic helicity and lepton asymmetry evolution in plasma of the early Universe before the electroweak phase transition (EWPT) accounting for chirality flip processes via inverse Higgs decays and sphaleron transitions which violate the left lepton number and wash out the baryon asymmetry of the Universe (BAU). In the scenario where the right electron asymmetry supports the BAU alone through the conservation law B/3−L_{eR}=const at temperatures T>T_{RL}~ 10TeV the following universe cooling leads to the production of a non-zero left lepton (electrons and neutrinos) asymmetry. This is due to the Higgs decays becoming more faster when entering the equilibrium at T=TRL with the universe expansion, Γ{RL}~T>H~T^2, resulting in the parallel evolution of both the right and the left electron asymmetries at T
Primary author
Prof.
Victor Semikoz
(IZMIRAN)
Co-authors
Alexander Smirnov
(IZMIRAN)
Prof.
Dmitry Sokoloff
(IZMIRAN, MSU)
