Does the first chaotic inflation model in supergravity provide the best fit to the Planck data?

TL;DR

This paper revisits the first supergravity chaotic inflation model, highlighting its compatibility with Planck data and proposing a generalization that also addresses dark energy and supersymmetry breaking.

Contribution

It introduces a generalized version of the original supergravity chaotic inflation model, extending its applicability to dark energy and supersymmetry breaking.

Findings

Model predicts spectral index n_s ≈ 0.967

Tensor-to-scalar ratio r ≈ 4×10^{-4}

Good agreement with Planck data

Abstract

I describe the first model of chaotic inflation in supergravity, which was proposed by Goncharov and the present author in 1983. The inflaton potential of this model has a plateau-type behavior $V_{0} (1- {8\over 3}\, e^{-\sqrt 6 |\phi|})$ at large values of the inflaton field. This model predicts $n_{s} = 1-{2\over N} \approx 0.967$ and $r = {4\over 3 N^{2}} \approx 4 \times 10^{{-4}}$, in good agreement with the Planck data. I propose a slight generalization of this model, which allows to describe not only inflation but also dark energy and supersymmetry breaking.