Minimal Fine Tuning in Supersymmetric Higgs Inflation

TL;DR

This paper explores how minimal fine-tuning in supersymmetric Higgs inflation models can produce inflation consistent with observations, linking particle physics parameters with cosmological data.

Contribution

It demonstrates that minimal fine-tuning of supersymmetric parameters can achieve successful inflation consistent with observational constraints.

Findings

Predicted spectral index range 0.950--0.965 matches observational data.

Minimal fine-tuning suffices for inflation with supersymmetric Higgs as inflaton.

Analysis covers a wide range of soft supersymmetry breaking scales.

Abstract

We investigate characteristic features of realistic parameter choice for primordial inflation with supersymmetric Higgs inflaton as an example of particle physics inflation model. We discuss constraints from observational results and analyze the degree of fine tuning needed to induce slow-roll inflation for wide range of soft supersymmetry breaking scale. The observed amplitude of density fluctuations implies that the minimal fine tuning for the combined electroweak scale and inflaton flatness predicts the spectral index of 0.950--0.965, which includes the central value from observational data.