Is the radion a chameleon?

Abstract

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.

16 pages, 3 figures, JCAP style

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Cited by in corpus (37)

• Beyond the Cosmological Standard Model
• Tests of Chameleon Gravity
• The Cosmology of f(R) Gravity in the Metric Variational Approach
• Cosmological Evolution With Interaction Between Dark Energy And Dark Matter
• A Unified Description of Screened Modified Gravity
• Exploring Cosmological Expansion Parametrizations with the Gold SnIa Dataset
• Growth of perturbations in dark matter coupled with quintessence
• Dark Energy Condensation
• Probing supernova shock waves and neutrino flavor transitions in next-generation water-Cherenkov detectors
• Interacting HDE and NADE in Brans-Dicke Chameleon Cosmology
• Chameleons with Field Dependent Couplings
• Small Scale Structure Formation in Chameleon Cosmology
• Gravitational radiation from compact binary systems in screened modified gravity
• Chameleon scalar fields in relativistic gravitational backgrounds
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• Chameleons in the Early Universe: Kicks, Rebounds, and Particle Production
• Post-Newtonian parameters and cosmological constant of screened modified gravity
• Cosmic Evolution in Brans-Dicke Chameleon Cosmology
• Quantum Chameleons
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• Dark Energy, Scalar-Tensor Gravity and Large Extra Dimensions
• Brane Cosmology with the Chameleon Scalar Field in Bulk
• Signatures of Modified Gravity on the 21-cm Power Spectrum at Reionisation
• Neutrino Dark Energy and Moduli Stabilization in a BPS Braneworld Scenario
• Big Bang Nucleosynthesis with an Evolving Radion in the Brane World Scenario
• Moduli-Induced Vacuum Destabilisation
• On Newton's law in supersymmetric braneworld models
• Determining Neutrino and Supernova Parameters with a Galactic Supernova
• Imprints of screened dark energy on nonlocal quantum correlations
• Gif Lectures on Cosmic Acceleration
• Chameleon mechanism with a new potential
• Brane World Cosmology, the CMB and the Radion
• Observational Constraints on Braneworld Geometry
• Cosmological Perturbations During Radion Stabilization