Dark world and baryon asymmetry from a common source

Details Dark world and baryon asymmetry from a common source Dark world and baryon asymmetry from a common source

2005-11-26

arxiv.org/abs/astro-ph/0511742v1

JCAP 0601:026,2006

Astronomy and Astrophysics

Astrophysics

28 pages

Scientific paper

10.1088/1475-7516/2006/01/026

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.

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