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The post-Newtonian limit in C-theories of gravitation

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arxiv 1109.4585 v2 pith:GCOVOBQZ submitted 2011-09-21 gr-qc astro-ph.COhep-th

The post-Newtonian limit in C-theories of gravitation

classification gr-qc astro-ph.COhep-th
keywords theoriesc-theoriesgeneralgravitylimitparameterspost-newtonianbeta
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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C-theory provides a unified framework to study metric, metric-affine and more general theories of gravity. In the vacuum weak-field limit of these theories, the parameterized post-Newtonian (PPN) parameters $\beta$ and $\gamma$ can differ from their general relativistic values. However, there are several classes of models featuring long-distance modifications of gravity but nevertheless passing the Solar system tests. Here it is shown how to compute the PPN parameters in C-theories and also in nonminimally coupled curvature theories, correcting previous results in the literature for the latter.

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