Thursday, November 10, 2011

1109.4585 (Tomi S. Koivisto)

The post-Newtonian limit in C-theories of gravitation    [PDF]

Tomi S. Koivisto
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.
View original: http://arxiv.org/abs/1109.4585

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