F-term uplifted racetrack inflation

TL;DR

This paper demonstrates how racetrack inflation models can be constructed within a supersymmetric framework using matter field F-term uplifting, affecting inflation dynamics and parameter tuning.

Contribution

It introduces fully supersymmetric racetrack inflation models with matter field F-term uplifting, exploring two SUSY breaking mechanisms and their impact on inflation.

Findings

Matter field dominates inflaton in Polonyi case

Parameter fine-tuning is reduced in SUSY models

Matter field decouples from inflation in O'Raifeartaigh case

Abstract

It is shown that two classes of racetrack inflation models, saddle point and inflection point ones, can be constructed in a fully supersymmetric framework with the matter field F-term as a source of supersymmetry (SUSY) breaking and uplifting. Two models of F-term SUSY breaking are considered: the Polonyi model and the quantum corrected O'Raifeartaigh model. In the former case, both classes of racetrack inflation models differ significantly from the corresponding models with non-SUSY uplifting. The main difference is a quite strong dominance of the inflaton by the matter field. In addition, fine-tuning of the parameters is relaxed as compared to the original racetrack models. In the case of the racetrack inflation models coupled to the O'Raifeartaigh model, the matter field is approximately decoupled from the inflationary dynamics.