Dark world and baryon asymmetry from a common source

2005/11/26 by Daijiro Suematsu
Physics and Astronomy · #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #Particle physics theoretical and experimental studies #astro-ph

paper · pdf · doi:10.1088/1475-7516/2006/01/026

published as JCAP 0601:026,2006 · 28 pages

arxiv created 2005/11/26 · openalex publication_date 2006/01/30 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/30

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 superstring theory. 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 for 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.

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