23 May 2024 | Hauke Fischer, Christian Käding, and Mario Pitschmann
This article summarizes the latest experimental constraints on three screened scalar field models: chameleon, symmetron, and environment-dependent dilaton. These models are considered as potential candidates for dark energy or dark matter. The study uses experimental results from the q BOUNCE collaboration, neutron interferometry, and Lunar Laser Ranging (LLR), as well as projected constraints from the Casimir And Non Newtonian force EXperiment (CANNEX). The results provide the most up-to-date constraints on these models.
The chameleon model is characterized by a scalar field that screens fifth forces in high-density environments. The symmetron model involves a scalar field that screens fifth forces through a symmetry-breaking mechanism. The environment-dependent dilaton model is a scalar field that depends on the local matter density for screening. The study presents constraints on the parameters of these models, including the mass scale, self-coupling parameters, and screening mechanisms.
The q BOUNCE experiment uses gravity resonance spectroscopy to measure the energy levels of ultracold neutrons and search for fifth forces. The results show that the measured energy levels are consistent with Newtonian gravity, and no significant deviations were found. The neutron interferometry experiment measures phase shifts in neutron beams passing through different environments, providing constraints on the scalar field parameters. The Lunar Laser Ranging experiment tests general relativity and potential deviations due to fifth forces, providing constraints on the scalar field parameters.
The CANNEX experiment is designed to measure the Casimir force and non-Newtonian forces, providing future constraints on the scalar field parameters. The study also updates the q BOUNCE constraints for the symmetron and chameleon models, taking into account the actual vacuum density and using non-perturbative methods for parameter regions where perturbation theory is inaccurate.
The results show that the most recent experimental constraints on the chameleon, symmetron, and environment-dependent dilaton models are consistent with the previous results, but with some improvements in the analysis. The study highlights the importance of high-precision experiments in constraining the parameters of screened scalar field models and provides a comprehensive overview of the current experimental constraints.This article summarizes the latest experimental constraints on three screened scalar field models: chameleon, symmetron, and environment-dependent dilaton. These models are considered as potential candidates for dark energy or dark matter. The study uses experimental results from the q BOUNCE collaboration, neutron interferometry, and Lunar Laser Ranging (LLR), as well as projected constraints from the Casimir And Non Newtonian force EXperiment (CANNEX). The results provide the most up-to-date constraints on these models.
The chameleon model is characterized by a scalar field that screens fifth forces in high-density environments. The symmetron model involves a scalar field that screens fifth forces through a symmetry-breaking mechanism. The environment-dependent dilaton model is a scalar field that depends on the local matter density for screening. The study presents constraints on the parameters of these models, including the mass scale, self-coupling parameters, and screening mechanisms.
The q BOUNCE experiment uses gravity resonance spectroscopy to measure the energy levels of ultracold neutrons and search for fifth forces. The results show that the measured energy levels are consistent with Newtonian gravity, and no significant deviations were found. The neutron interferometry experiment measures phase shifts in neutron beams passing through different environments, providing constraints on the scalar field parameters. The Lunar Laser Ranging experiment tests general relativity and potential deviations due to fifth forces, providing constraints on the scalar field parameters.
The CANNEX experiment is designed to measure the Casimir force and non-Newtonian forces, providing future constraints on the scalar field parameters. The study also updates the q BOUNCE constraints for the symmetron and chameleon models, taking into account the actual vacuum density and using non-perturbative methods for parameter regions where perturbation theory is inaccurate.
The results show that the most recent experimental constraints on the chameleon, symmetron, and environment-dependent dilaton models are consistent with the previous results, but with some improvements in the analysis. The study highlights the importance of high-precision experiments in constraining the parameters of screened scalar field models and provides a comprehensive overview of the current experimental constraints.