Cosmological Implications of 5-dimensional Brans-Dicke Theory

Abstract

The five dimensional Brans-Dicke theory naturally provides two scalar fields by the Killing reduction mechanism. These two scalar fields could account for the accelerated expansion of the universe. We test this model and constrain its parameter by using the type Ia supernova (SN Ia) data. We find that the best fit value of the 5-dimensional Brans-Dicke coupling contant is $\omega =-1.9$. This result is also consistent with other observations such as the baryon acoustic oscillation (BAO).

5 pages, 4 figures, PLB accepted

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• Exact Cosmological Solutions in Modified Brans-Dicke Theory
• The Noether Symmetry Approach: Foundation and applications. The case of scalar-tensor Gauss-Bonnet gravity
• Geodesic deviation equation in Brans-Dicke theory in arbitrary dimensions
• Extended anisotropic models in noncompact Kaluza-Klein theory
• Scalar field as an intrinsic time measure in coupled dynamical matter-geometry systems. I. Neutral gravitational collapse
• Connection Dynamics for Higher Dimensional Scalar-Tensor Theories of Gravity