# Unified Model of D-Term Inflation

## TL;DR

This paper proposes a unified model of D-term inflation within strongly coupled supersymmetric gauge theories, addressing previous shortcomings and connecting inflation with high-scale supersymmetry breaking and B-L symmetry breaking.

## Contribution

It introduces a novel framework where D-term inflation is realized through dynamical supersymmetry breaking, unifying inflationary dynamics with supersymmetry and B-L symmetry breaking.

## Key findings

- Remedies issues of traditional D-term inflation models.
- Links D-term inflation to high-scale supersymmetry breaking.
- Connects inflation end to B-L symmetry breaking.

## Abstract

Hybrid inflation, driven by a Fayet-Iliopoulos (FI) D term, is an intriguing inflationary model. In its usual formulation, it however suffers from several shortcomings. These pertain to the origin of the FI mass scale, the stability of scalar fields during inflation, gravitational corrections in supergravity, as well as to the latest constraints from the cosmic microwave background. We demonstrate that these issues can be remedied if D-term inflation is realized in the context of strongly coupled supersymmetric gauge theories. We suppose that the D term is generated in consequence of dynamical supersymmetry breaking. Moreover, we assume canonical kinetic terms in the Jordan frame as well as an approximate shift symmetry along the inflaton direction. This provides us with a unified picture of D-term inflation and high-scale supersymmetry breaking. The D term may be associated with a gauged U(1)_B-L, so that the end of inflation spontaneously breaks B-L in the visible sector.