Key points are not available for this paper at this time.
The connection between f (R) theories of gravity and scalar-tensor models with a "physical" metric coupled to the scalar field is well known. In this work, we pursue the equivalence between a suitable scalar theory and a model that generalises the f (R) scenario, encompassing both a non-trivial scalar curvature term and a non-minimum coupling of the scalar curvature and matter. This equivalence allows for the calculation of the PPN parameters and and, eventually, a solution to the debate concerning the weak-field limit of f (R) theories.
Bertolami et al. (Tue,) studied this question.