Beyond the Chameleon Mechanism
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As a result of non-linear self-interactions, in chameleon theories where the field couples to matter much more strongly than gravity does, the fifth force between two bodies with thin-shell is independent of their coupling to the field. As a consequence the bounds on the coupling coming from terrestrial tests of gravity, measurements of the Casimir force and those constraints imposed by the physics of compact objects, big-bang nucleosynthesis and measurements of the cosmic microwave background anisotropies can be exponentially relaxed.
To appear in the proceedings of 43rd Rencontres de Moriond on Cosmology, La Thuile, Italy, March 15 - 22, 2008
To appear in the proceedings of 43rd Rencontres de Moriond on Cosmology, La Thuile, Italy, March 15 - 22, 2008