title: Compatibility of the chameleon-field model with fifth-force experiments, cosmology, and PVLAS and CAST results.
abstract: We analyze the PVLAS results using a chameleon field whose properties depend on the environment. We find that, assuming a runaway bare potential V(phi) and a universal coupling to matter, the chameleon potential is such that the scalar field can act as dark energy. Moreover, the chameleon-field model is compatible with the CERN Axion Solar Telescope results, fifth-force experiments, and cosmology.
authors.affiliation: Service de Physique Théorique, Commissariat à l'Energie Atomique-Saclay, 91191 Gif-sur-Yvette Cedex, France. brax@spht.saclay.cea.fr
authors.forename: Philippe
authors.initials: P
authors.lastname: Brax
authors.forename: Carsten
authors.initials: C
authors.lastname: van de Bruck
authors.forename: Anne-Christine
authors.initials: AC
authors.lastname: Davis