Journal
CLASSICAL AND QUANTUM GRAVITY
Volume 24, Issue 24, Pages 6417-6430Publisher
IOP Publishing Ltd
DOI: 10.1088/0264-9381/24/24/015
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The role of torsion in f (R) gravity is considered in the framework of metric-affine formalism. We discuss the field equations in empty space and in the presence of perfect fluid matter, taking into account the analogy with the Palatini formalism. As a result, the extra curvature and torsion degrees of freedom can be dealt as an effective scalar field of a fully geometric origin. From a cosmological point of view, such a geometric description could account for the whole dark side of the universe.
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