An analytic treatment of Quartic Hilltop Inflation

TL;DR

This paper provides a comprehensive analytic analysis of quartic hilltop inflation, aligning with recent numerical findings and offering simple formulas to evaluate its observational viability.

Contribution

It presents the first fully analytic treatment of quartic hilltop inflation, clarifying its behavior and observational predictions.

Findings

Analytic formulas match numerical results.

Quartic hilltop inflation remains consistent with observations.

Provides tools for testing inflationary models.

Abstract

Quartic hilltop inflation remains one of the most successful inflationary models. Yet, the expectations of early treatments of hilltop inflation would contradict the observations and render the model excluded. However, recent numerical treatment has demonstrated that quartic hilltop inflation actually fares well with observations. In this work, a fully analytic treatment of the model aims to dispel the mystery surrounding the behaviour of quartic hilltop inflation. The results obtained are in excellent agreement with numerical works on the subject, yet offer simple analytic formulas to calculate observables and easily test thereby quartic hilltop inflation, hopefully revealing information on the theoretical background.