Brans-Dicke Scalar Field as a Chameleon

Abstract

In this paper it is shown that in Brans - Dicke theory, if one considers a non-minimal coupling between the matter and the scalar field, it can give rise to a late time accelerated expansion for the universe preceded by a decelerated expansion for very high values of the Brans - Dicke parameter $\omega$.

10 pages, 8 figures; Contents added, References added; Revised version accepted for publication in Physical Review D

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