Particle physics model of curvaton inflation in a stable universe

TL;DR

This paper proposes a particle physics model for cosmic inflation involving multiple scalar fields, ensuring stability and perturbativity up to the Planck scale, and explores its parameter space with right-handed neutrinos.

Contribution

It introduces a stable, perturbative scalar potential model for inflation with specific assumptions and analyzes the parameter space considering right-handed neutrinos.

Findings

Energy scale of inflation is set automatically by the model.

Allowed parameter space depends on the Yukawa coupling of right-handed neutrinos.

Model remains perturbative and bounded up to the Planck scale.

Abstract

We investigate a particle physics model for cosmic inflation based on the following assumptions: (i) there are at least two complex scalar fields; (ii) the scalar potential is bounded from below and remains perturbative up to the Planck scale; (iii) we assume slow-roll inflation with maximally correlated adiabatic and entropy fluctuations 50--60 e-folds before the end of inflation. The energy scale of the inflation is set automatically by the model. Assuming also at least one massive right handed neutrino, we explore the allowed parameter space of the scalar potential as a function of the Yukawa coupling of this neutrino.