Time evolution of the fine structure constant in a two-field quintessence model

• Type: Article in International Scientific Journal
• Date: 2004

Authors

Bento, MC (Author) Other; Bertolami, O (Author) Other; Santos, NMC (Author) Other

Journal

Title: Physical Review D - Particles, Fields, Gravitation and Cosmology

Vol. 70 No. 83506

Pages: 107304-1-107304-4

ISSN: 1550-7998

Publisher: American Physical Society

Indexing

ISI Web of Knowledge - 23 Citations

Scopus - 24 Citations

Scientific classification

FOS: Natural sciences > Physical sciences

Other information

Authenticus ID: P-000-80B

DOI: 10.1103/physrevd.70.107304

Abstract (EN): We examine the variation of the fine structure constant in the context of a two-field quintessence model. We find that, for solutions that lead to a transient late period of accelerated expansion, it is possible to fit the data arising from quasar spectra and comply with the bounds on the variation of alpha from the Oklo reactor, meteorite analysis, atomic clock measurements, cosmic microwave background radiation, and big bang nucleosynthesis. That is more difficult if we consider solutions corresponding to a late period of permanent accelerated expansion.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 4