Compatibility of the chameleon-field model with fifth-force experiments, cosmology, and PVLAS and CAST results.
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.
Brax
Philippe
P
Service de Physique Théorique, Commissariat à l'Energie Atomique-Saclay, 91191 Gif-sur-Yvette Cedex, France. brax@spht.saclay.cea.fr
van de Bruck
Carsten
C
Davis
Anne-Christine
AC