Saddle point inflation from higher order corrections to Higgs/Starobinsky inflation

TL;DR

This paper investigates saddle point inflation scenarios arising from higher order corrections in generalized gravity theories, demonstrating compatibility with PLANCK 2015 data for both Starobinsky and Higgs inflation models.

Contribution

It introduces saddle point inflation models from higher order corrections in generalized gravity, expanding the understanding of inflationary potentials compatible with observations.

Findings

Identified parameter space for inflection point inflation in Jordan frame Starobinsky potential.

Analyzed effects of non-renormalizable terms on Higgs inflation potential.

Confirmed models are consistent with PLANCK 2015 observational data.

Abstract

We explore two saddle point inflationary scenarios in the context of higher order corrections related to different generalisations of general relativity. Firstly, we deal with Jordan frame Starobinsky potential, for which we identify a portion of a parameter space of inflection point inflation, which can accommodate all the experimental results. Secondly, we analyse Higgs inflation and more specifically the influence of non-renormalisible terms on the standard quartic potential. All results were verified with the PLANCK 2015 data.