Brane-world cosmology and varying $G$

Details Brane-world cosmology and varying $G$ Brane-world cosmology and varying $G$

2009-08-20

arxiv.org/abs/0908.2949v1

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

26 pages, 3 figures

Scientific paper

We consider a brane-world cosmological model coupled to a bulk scalar field. Since the brane tension turns out to be proportional to Newton coupling $G$, in such a model a time variation of $G$ naturally occurs. By resorting to available bounds on the variation of $G$, the parameters of the model are constrained. The constraints coming from nucleosynthesis and CMB result to be the severest ones.

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