Perturbations and non-Gaussianities in three-form inflationary magnetogenesis

TL;DR

This paper investigates how three-form inflation can generate cosmic magnetic fields, analyzing perturbations and non-Gaussian signals to assess the model's viability and distinctive observational signatures.

Contribution

It provides a detailed analysis of perturbations and non-Gaussianities in three-form inflationary magnetogenesis, addressing backreaction and consistency of the perturbative approach.

Findings

Identifies potential non-Gaussian signatures in the model.

Assesses the backreaction effects during inflation.

Discusses the validity of perturbation theory in this context.

Abstract

We reconsider magnetogenesis in the context of three-form inflation, and its backreaction. In particular, we focus on first order perturbation theory during inflation and subsequent radiation era: we discuss the consistency of the perturbative approach, and elaborate on the possible non-Gaussian signatures of the model.