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

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

2007-03-22

arxiv.org/abs/hep-ph/0703243v2

Phys.Rev.Lett.99:121103,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages, title change, comments added, version to appear in Physical Review Letters

Scientific paper

10.1103/PhysRevLett.99.121103

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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