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

Journal Article · Mon Nov 15 00:00:00 EST 2004 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PhysRevD.70.107304· OSTI ID:20698068

Bento, M C; Bertolami, O; Santos, N M.C. ^[1]

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1. Departamento de Fisica, Instituto Superior Tecnico, Avenida Rovisco Pais 1, 1049-001 Lisbon (Portugal)

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.

• OSTI ID: 20698068
• Journal Information: Physical Review. D, Particles Fields, Vol. 70, Issue 10; Other Information: DOI: 10.1103/PhysRevD.70.107304; (c) 2004 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
COSMIC RADIATION
COSMOLOGY
FINE STRUCTURE
MATHEMATICAL SOLUTIONS
NONLUMINOUS MATTER
NUCLEOSYNTHESIS
QUASARS
RADIOWAVE RADIATION
RELICT RADIATION
SOMMERFELD CONSTANT
VARIATIONS