Dark world and baryon asymmetry from a common source

TL;DR

This paper proposes a unified framework where a supersymmetric model with global symmetry and flat directions explains the origin of baryon asymmetry, dark matter, and dark energy through nonthermal mechanisms involving axions and the Affleck-Dine process.

Contribution

It introduces a model where a combined axion field accounts for dark energy, and baryon asymmetry plus dark matter are generated nonthermally via the Affleck-Dine mechanism along flat directions.

Findings

A flat potential for the combined axion candidate can explain dark energy.

Nonthermal production of baryon asymmetry and dark matter via Affleck-Dine mechanism.

Unified explanation linking dark energy, dark matter, and baryon asymmetry.

Abstract

We study generation of baryon number asymmetry and both abundance of dark matter and dark energy on the basis of global symmetry and its associating flat directions in a supersymmetric model. We assume the existence of a model independent axion which is generally expected in the effective theory of superstring. If we consider a combined field of the model independent axion and a pseudo Nambu-Goldstone boson coming from spontaneous breaking of the global symmetry, its potential can be sufficiently flat and then it may present a candidate of the dark energy as a quintessential axion. Both the baryon asymmetry and the dark matter are supposed to be produced nonthermally as the asymmetry of another global charge through the Affleck-Dine mechanism along the relevant flat direction. Its decay to the observable and hidden sectors explains the baryon number asymmetry and the dark matter abundance, respectively.