Investigation of nonlinear neutrino effects reveals critical insights into baryon asymmetry and thermal history.
Key Points
This research aims to explore the effects of nonlinear modifications to the Standard Model on neutrino dynamics and baryon asymmetry in the early universe.
Analyzed nonlinear modifications of the Standard Model Lagrangian.
Derived modified Boltzmann equations for heavy-neutrino abundance and lepton asymmetry.
Investigated the influence of temperature-dependent neutrino masses on washout rates.
Nonlinear terms in the equations enhance or suppress washout rates based on their sign.
Derivation shows that lepton asymmetry affects final baryon asymmetry after sphaleron conversion.
Establishes that neutrino masses should be treated as temperature-dependent in cosmological contexts.