The electromagnetic coupling and the dark side of the Universe

• Type: Article in International Scientific Journal
• Date: 2007

Authors

Bento, MC (Author) Other; Bertolami, O (Author) Other; Torres, P (Author) Other

Journal

Title: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

Vol. 648

Pages: 14-18

ISSN: 0370-2693

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 4 Citations

Scopus - 3 Citations

Scientific classification

FOS: Natural sciences > Physical sciences

Other information

Authenticus ID: P-004-AJW

DOI: 10.1016/j.physletb.2007.02.066

Abstract (EN): We examine the properties of dark energy and dark matter through the study of the variation of the electromagnetic coupling. For concreteness, we consider the unification model of dark energy and dark matter, the generalized Chaplygin gas model (GCG), characterized by the equation of state p = A/rho(alpha), where p is the pressure, rho is the energy density and A and alpha are positive constants. The coupling of electromagnetism with the GCG's scalar field can give rise to such a variation. We compare our results with experimental data, and find that the degeneracy on parameters alpha and A(s), A(s) = A/rho(1+alpha)(ch0), is considerable.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 5