A Compendium of Chameleon Constraints

Abstract

The chameleon model is a scalar field theory with a screening mechanism that explains how a cosmologically relevant light scalar can avoid the constraints of intra-solar-system searches for fifth-forces. The chameleon is a popular dark energy candidate and also arises in $f(R)$ theories of gravity. Whilst the chameleon is designed to avoid historical searches for fifth-forces it is not unobservable and much effort has gone into identifying the best observables and experiments to detect it. These results are not always presented for the same models or in the same language, a particular problem when comparing astrophysical and laboratory searches making it difficult to understand what regions of parameter space remain. Here we present combined constraints on the chameleon model from astrophysical and laboratory searches for the first time and identify the remaining windows of parameter space. We discuss the implications for cosmological chameleon searches and future small-scale probes.

23 pages, three figure, three tables. Comments welcome

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Cited by in corpus (18)

• Implications of the Neutron Star Merger GW170817 for Cosmological Scalar-Tensor Theories
• Self-interactions and Spontaneous Black Hole Scalarization
• Superradiance evolution of black hole shadows revisited
• Probing new spin-independent interactions through precision spectroscopy in atoms with few electrons
• Towards Strong Field Tests of Beyond Horndeski Gravity Theories
• Cosmological direct detection of dark energy: non-linear structure formation signatures of dark energy scattering with visible matter
• Speeding up $N$-body simulations of modified gravity: Chameleon screening models
• Testing Brans-Dicke Gravity with Screening by Scalar Gravitational Wave Memory
• Constraints on Spatially Oscillating Sub-mm Forces from the Stanford Levitated Microsphere Experiment Data
• Lensing with generalized symmetrons
• Stellar Pulsations in Beyond Horndeski Gravity Theories
• Quasi-normal modes of black holes in scalar-tensor theories with non-minimal derivative couplings
• Highly compact neutron stars and screening mechanisms. I. Equilibrium and stability
• Cosmic Tsunamis in Modified Gravity: Disruption of Screening Mechanisms from Scalar Waves
• Testing screened modified gravity with SDSS-IV-MaNGA
• The Galaxy Halo Connection in Modified Gravity Cosmologies: Environment Dependence of Galaxy Luminosity function
• Cosmological Solutions of Chameleon Scalar Field Model
• Signatures of Solar Chameleons in the Earth's Magnetic Field