Superconformal Generalization of the Chaotic Inflation Model \lambda \phi^4/4 - \xi/ 2 \phi^2 R

TL;DR

This paper extends chaotic inflation models with a  potential by incorporating a small non-minimal coupling to gravity, embedding it into superconformal and supergravity frameworks, and demonstrating its naturalness and observational consistency.

Contribution

It introduces a superconformal embedding of the  inflation model with non-minimal coupling, showing its naturalness and compatibility with observational data.

Findings

Model with  potential and small  fits observational data.

Embedding into superconformal and supergravity theories achieved.

Small  parameter is technically natural due to enhanced symmetry.

Abstract

A model of chaotic inflation based on the theory of a scalar field with potential \lambda\phi^4 perfectly matches the observational data if one adds to it a tiny non-minimal coupling to gravity -\xi/2 \phi^2 R with \xi > 0.002. We describe embedding of this model into the superconformal theory with spontaneous breaking of superconformal symmetry, and into supergravity. A model with small \xi is technically natural: setting the small parameter \xi to zero leads to a point of enhanced symmetry in the underlying superconformal theory.