1/R gravity and Scalar-Tensor Gravity

Details 1/R gravity and Scalar-Tensor Gravity 1/R gravity and Scalar-Tensor Gravity

2003-07-18

arxiv.org/abs/astro-ph/0307338v3

Phys.Lett.B575:1-3,2003

Astronomy and Astrophysics

Astrophysics

4 pages, to appear in PLB

Scientific paper

10.1016/j.physletb.2003.09.033

We point out that extended gravity theories, the Lagrangian of which is an arbitrary function of scalar curvature $R$, are equivalent to a class of the scalar tensor theories of gravity. The corresponding gravity theory is $\omega=0$ Brans-Dicke gravity with a potential for the Brans-Dicke scalar field, which is not compatible with solar system experiments if the field is very light: the case when such modifications are important recently.

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