TL;DR
This paper explores a five-dimensional DGP-brane cosmology with a non-minimally coupled scalar field in Brans-Dicke theory, deriving effective 4D equations and discussing implications for accelerated universe expansion.
Contribution
It introduces a novel five-dimensional DGP-brane model with a non-minimally coupled scalar field within Brans-Dicke theory, deriving effective 4D equations and analyzing cosmological consequences.
Findings
Predicts an accelerated expanding universe.
Mass in gravitational potential is modified by brane curvature.
Brans-Dicke parameter aligns with solar system constraints.
Abstract
We consider a five dimensional DGP-brane scenario endowed with a non-minimally coupled scalar field within the context of Brans-Dicke theory. This theory predicts that the mass appearing in the gravitational potential is modified by the addition of the mass of the effective intrinsic curvature on the brane. We also derive the effective four dimensional field equations on a 3+1 dimensional brane where the fifth dimension is assumed to have an orbifold symmetry. Finally, we discuss the cosmological implications of this setup, predicting an accelerated expanding universe with a value of the Brans-Dicke parameter consistent with values resulting from the solar system observations.
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