Inflation in uplifted Supergravities

TL;DR

This paper develops a supergravity-based inflation model with D-term uplifting from string theory, successfully addressing common inflation challenges and aligning with observational data.

Contribution

It introduces a gauge-invariant D-term uplifting mechanism in supergravity for inflation, overcoming eta and initial condition problems.

Findings

Incorporates eternal topological inflation.

Achieves compatibility with observational constraints.

Provides a gauge-invariant uplifted supergravity model.

Abstract

We present a model of slow-roll inflation in the context of effective Supergravities arising from string theories. The uplifting of the potential (to generate dS or Minkowski vacua) is provided by the D-term associated to an anomalous U(1), in a fully consistent and gauge invariant formulation. We develop a minimal working model which incorporates eternal topological inflation and complies with observational constraints, avoiding the usual obstacles to implement successful inflation ("eta problem" and initial condition problem among others).