EVOLVING NEWTON'S CONSTANT IN HIGHER DERIVATIVE THEORIES

摘要

In this paper we will discuss about the derivation of an effective Newtonian gravitational constant for a class of higher derivative theories and we will use the primordial nucleosynthesis bounds and the local gravity constraints on Ge f f in order to test the viability of several cases of our general Lagrangian. Finally, we will also consider modified gravity models with an arbitrary coupling between matter and geometry and we will follow the same programme.