Affleck-Dine Baryogenesis, Split Supersymmetry, and Inflation

TL;DR

This paper presents a model within split supersymmetry that unifies chaotic inflation and baryogenesis via the Affleck-Dine mechanism, linking inflationary fluctuations to baryonic isocurvature perturbations constrained by WMAP data.

Contribution

It introduces a simple scalar field model that simultaneously explains inflation and baryon asymmetry in split supersymmetry, with parameters tightly constrained by observations.

Findings

The model reproduces observed baryon asymmetry.

Quantum fluctuations of the scalar phase produce baryonic isocurvature perturbations.

Model parameters are narrowly constrained by WMAP data.

Abstract

It is shown that, in the context of split supersymmetry, a simple model with a single complex scalar field can produce chaotic inflation and generate the observed amount of baryon asymmetry via the Affleck-Dine mechanism. While the inflaton quantum fluctuations give rise to curvature perturbation, we show that quantum fluctuations of the phase of the scalar field can produce baryonic isocurvature perturbation. Combining with constraints from WMAP data, all parameters in the model can be determined to within a narrow range.