The MSSM inflation and cosmological attractors

TL;DR

This paper explores inflationary models based on the MSSM with multiple scalar fields non-minimally coupled to gravity, demonstrating compatibility with observational data through numerical analysis.

Contribution

It introduces a novel MSSM inflation model with polynomial potentials and non-minimal couplings, analyzing inflationary parameters using the strong coupling approximation.

Findings

Inflationary scenarios align with observational data for various MSSM mixing angles.

The strong coupling approximation simplifies the analysis of multi-field inflation.

Numerical results confirm the viability of MSSM-based inflation models.

Abstract

Inflationary scenarios motivated by the Minimal Supersymmetric Standard Model (MSSM) where five scalar fields are non-minimally coupled to gravity are considered. The potential of the model and the function of non-minimal coupling are polynomials of two Higgs doublet convolutions. We show that the use of the strong coupling approximation allows to obtain inflationary parameters in the case when a combination of the four scalar fields plays a role of inflaton. Numerical calculations show that the cosmological evolution leads to inflationary scenarios fully compatible with observational data for different values of the MSSM mixing angle $\beta$.