The Solar System bounds on R^n gravity are often ignored in the literature by invoking the chameleon mechanism. We show that in order for the latter to work, the exponent n must be ridicolously close to unity and, therefore, these theories are severely constrained.
Cite
@article{arxiv.1106.0328,
title = {R^n gravity and the chameleon},
author = {Valerio Faraoni},
journal= {arXiv preprint arXiv:1106.0328},
year = {2011}
}
Comments
5 pages, latex, 1 figure, to appear in Phys. Rev. D