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Is the radion a chameleon?

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arxiv astro-ph/0408464 v1 pith:24K2X2J3 submitted 2004-08-25 astro-ph hep-phhep-th

Is the radion a chameleon?

classification astro-ph hep-phhep-th
keywords fieldradionchameleoncouplingsmattermechanismbranecase
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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The chameleon mechanism is a way to give an effective mass to a light scalar field via field self-interaction and interaction with matter. We study this mechanism in models in which the couplings are field dependent and find that the properties are very different from the case of constant couplings. The consequence of a runaway potential for the radion field in brane world scenarios and whether the radion can play the role of dark energy is investigated. The cosmological evolution during the inflationary epoch, the radiation and the matter dominated epochs are discussed as is the compatibility of the radion field with local tests of gravity.

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Cited by 1 Pith paper

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  1. Direct detection of solar chameleons with electron recoil data from XENONnT

    hep-ph 2025-11 conditional novelty 5.0

    XENONnT electron-recoil data bound solar chameleons to log10 β_eff < −6.9, independent of the potential index n for inverse power-law chameleons at the dark-energy scale.