Screenings in Modified Gravity: a perturbative approach

Abstract

We present a formalism to study screening mechanisms in modified theories of gravity via perturbative methods in different cosmological scenarios. We consider Einstein frame posed theories that are recast as Jordan frame theories, where a known formalism is employed, though the resulting non-linearities of the Klein-Gordon equation acquire an explicit coupling between matter and the scalar field, which is not present in Jordan frame theories. The obtained growth functions are then separated in screening and non-screened contributions to facilitate its analysis. This allows us to compare several theoretical models and to recognize patterns which can be used to differentiate models and their screening mechanisms. In particular, we find anti-screening features in the Symmetron model. In opposition, chameleon type theories, both in the Jordan and in the Einstein frame, always present a screening behaviour. Up to third order in perturbation, we find no anti-screening behaviour in theories with a Vainshtein mechanism, such as the DGP and the cubic Galileon.

12 pages, 9 figures. Replaced to match version accepted for publication in A&A

References in corpus (16)

• The Confrontation between General Relativity and Experiment
• Models of f(R) Cosmic Acceleration that Evade Solar-System Tests
• Beyond the Cosmological Standard Model
• Resumming Cosmological Perturbations via the Lagrangian Picture: One-loop Results in Real Space and in Redshift Space
• Environmental Dependence of Masses and Coupling Constants
• Non-linear Evolution of f(R) Cosmologies III: Halo Statistics
• Non-linear evolution of f(R) cosmologies II: power spectrum
• Linking Tests of Gravity On All Scales: from the Strong-Field Regime to Cosmology
• Non-linear Evolution of Matter Power Spectrum in Modified Theory of Gravity
• Lagrangian perturbation theory at one loop order: successes, failures, and improvements
• Towards Precision Constraints on Gravity with the Effective Field Theory of Large-Scale Structure
• Regularized cosmological power spectrum and correlation function in modified gravity models
• The one-loop matter bispectrum as a probe of gravity and dark energy
• Halo velocity profiles in screened modified gravity theories
• Matter bispectrum beyond Horndeski
• Nonlinear evolution of initially biased tracers in modified gravity

Cited by in corpus (15)

• Testing Screened Modified Gravity
• Matter Power Spectrum Emulator for f(R) Modified Gravity Cosmologies
• Fast computation of non-linear power spectrum in cosmologies with massive neutrinos
• An accurate perturbative approach to redshift space clustering of biased tracers in modified gravity
• $\text{Hi-COLA}$: Fast, approximate simulations of structure formation in Horndeski gravity
• Redshift space power spectrum beyond Einstein-de Sitter kernels
• Marked correlation functions in perturbation theory
• Constraints on $f(R)$ and nDGP Modified Gravity Model Parameters with Cluster Abundances and Galaxy Clustering
• fkPT: Constraining scale-dependent modified gravity with the full-shape galaxy power spectrum
• Primordial Black Hole-Neutron Star Merger Rate in Modified Gravity
• On the galaxy 3-point correlation function in Modified Gravity
• Non-linear density-velocity dynamics in $f(R)$ gravity from spherical collapse
• Fullshape power spectrum for the Symmetron modified gravity model
• Neural Networks for cosmological model selection and feature importance using Cosmic Microwave Background data
• Tracing Signatures of Modified Gravity in Redshift-Space Galaxy Bispectrum Multipoles: Prospects for Euclid