Plateau Inflation in SUGRA-MSSM

TL;DR

This paper presents a Higgs inflation model within SUGRA-MSSM where the inflaton is the neutral Higgs, producing a plateau potential compatible with CMB data, advancing supergravity-based inflation theories.

Contribution

It introduces a novel Higgs inflation scenario in SUGRA-MSSM with higher order terms, achieving a plateau potential consistent with observations.

Findings

Inflation potential is plateau-like with the imaginary part of the neutral Higgs as inflaton.

Model predictions align with latest CMB observations.

The scenario is compatible with minimal supersymmetric standard model extensions.

Abstract

We explored a Higgs inflationary scenario in the SUGRA embedding of the MSSM in Einstein frame where the inflaton is contained in the $SU(2)$ Higgs doublet. We include all higher order non-renormalizable terms to the MSSM superpotential and an appropriate K\"ahler potential which can provide slow-roll inflaton potential in the $D-$flat direction. In this model, a plateau-like inflation potential can be obtained if the imaginary part of the neutral Higgs acts as the inflaton. The inflationary predictions of this model are consistent with the latest CMB observations. The model represents a successful Higgs inflation scenario in the context of Supergravity and it is compatible with Minimal Supersymmetric extension of the Standard Model.