Compatibility of the chameleon-field model with fifth-force experiments, cosmology, and PVLAS and CAST results

A.-C. Davis; C. van de Bruck; Ph. Brax

Compatibility of the chameleon-field model with fifth-force experiments, cosmology, and PVLAS and CAST results

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arxiv hep-ph/0703243 v2 pith:KQQELAOD submitted 2007-03-22 hep-ph astro-phhep-th

Compatibility of the chameleon-field model with fifth-force experiments, cosmology, and PVLAS and CAST results

Ph. Brax , C. van de Bruck , A.-C. Davis This is my paper

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keywords chameleonfieldresultscastcosmologyexperimentsmodelpotential

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We analyse 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 CAST results, fifth force experiments and cosmology.

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