Modified gravity with <i>R</i> –matter couplings and (non-)geodesic motion
Thomas P. SotiriouCenter for Fundamental Physics, University of Maryland, College Park, MD 20742-4111, USAValerio FaraoniPhysics Department, Bishop's University, 2600 College St., Sherbrooke, Quèbec, J1M 1Z7, Canada
2008en
ABI
Abstract
We consider alternative theories of gravity with a direct coupling between matter and the Ricci scalar We study the relation between these theories and ordinary scalar-tensor gravity, or scalar-tensor theories which include non-standard couplings between the scalar and matter. We then analyze the motion of matter in such theories, its implications for the Equivalence Principle, and the recent claim that they can alleviate the dark matter problem in galaxies.
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Cited by 20 references