# MSSM-inspired multifield inflation

## TL;DR

This paper explores multifield inflation models inspired by the MSSM, analyzing their cosmological predictions and demonstrating compatibility with observational data using the strong coupling approximation.

## Contribution

It introduces MSSM-inspired multifield inflation scenarios with five scalar fields and nonminimal couplings, providing detailed calculations and demonstrating their observational viability.

## Key findings

- Consistent inflationary scenarios compatible with data
- Strong coupling approximation effectively describes the models
- Multifield dynamics lead to viable cosmological evolution

## Abstract

Despite the fact that experimentally with a high degree of statistical significance only a single Standard Model--like Higgs boson is discovered at the LHC, extended Higgs sectors with multiple scalar fields not excluded by combined fits of the data are more preferable theoretically for internally consistent realistic models of particle physics. We analyze the inflationary scenarios which could be induced by the two-Higgs doublet potential of the Minimal Supersymmetric Standard Model (MSSM) where five scalar fields have nonminimal couplings to gravity. Observables following from such MSSM-inspired multifield inflation are calculated and a number of consistent inflationary scenarios are constructed. Cosmological evolution with different initial conditions for the multifield system leads to consequences fully compatible with observational data on the spectral index and the tensor-to-scalar ratio. It is demonstrated that the strong coupling approximation is precise enough to describe such inflationary scenarios.