Speaker
Ekaterina Pozdeeva
(SINP MSU)
Description
The possibility to construct inflationary models for the
renormalization-group (RG) improved potentials corresponding to
scalar electrodynamics and to SU(2) and SU(5) models is
investigated. In all cases, the tree-level potential, which
corresponds to the cosmological constant in the Einstein frame, is
seen to be nonsuitable for inflation. Rather than adding the
Hilbert-Einstein term to the action, quantum corrections to the
potential, coming from the RG equation, are included. The
inflationary scenario is analyzed with unstable de Sitter
solutions that correspond to positive values of the coupling
function, only. We show that, for the finite SU(2) model and SU(2)
gauge model, there are no de Sitter solutions suitable for
inflation, unless exit from it occurs according to some weird,
nonstandard scenarios. Inflation is realized both for scalar
electrodynamics and for SU(5) RG-improved potentials, and the
corresponding values of the coupling function are seen to be
positive. It is shown that, for quite reasonable values of the
parameters, the inflationary models obtained both from scalar
electrodynamics and from the SU(5) RG-improved potentials are in
good agreement with the most recent observational data. Report is
based on E. Elizalde, S. D. Odintsov, E. O. Pozdeeva and S. Yu.
Vernov, PHYSICAL REVIEW D 90, 084001 (2014)
Primary author
Ekaterina Pozdeeva
(SINP MSU)
