K-mouflage gravity models that pass Solar System and cosmological constraints

Abstract

We show that Solar System tests can place very strong constraints on K-mouflage models of gravity, which are coupled scalar field models with nontrivial kinetic terms that screen the fifth force in regions of large gravitational acceleration. In particular, the bounds on the anomalous perihelion of the Moon imposes stringent restrictions on the K-mouflage Lagrangian density, which can be met when the contributions of higher-order operators in the static regime are sufficiently small. The bound on the rate of change of the gravitational strength in the Solar System constrains the coupling strength $\beta$ to be smaller than $0.1$. These two bounds impose tighter constraints than the results from the Cassini satellite and Big Bang Nucleosynthesis. Despite the Solar System restrictions, we show that it is possible to construct viable models with interesting cosmological predictions. In particular, relative to $\Lambda$-CDM, such models predict percent-level deviations for the clustering of matter and the number density of dark matter haloes. This makes these models predictive and testable by forthcoming observational missions.

15 pages

References in corpus (8)

• The Confrontation between General Relativity and Experiment
• Testing General Relativity with 21 cm intensity mapping
• Lunar Laser Ranging Tests of the Equivalence Principle
• Nonlinear structure formation in Nonlocal Gravity
• K-mouflage Cosmology: the Background Evolution
• K-mouflage Cosmology: Formation of Large-Scale Structures
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Cited by in corpus (19)

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• The Novel Probes Project -- Tests of Gravity on Astrophysical Scales
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• Testing Gravity Using Galaxy Clusters: New Constraints on Beyond Horndeski Theories
• Fast full $N$-body simulations of generic modified gravity: derivative coupling models
• K-mouflage effects on clusters of galaxies
• K-mouflage Imprints on Cosmological Observables and Data Constraints
• Distinguishing modified gravity models
• 3D Weak Lensing: Modified Theories of Gravity
• The effective field theory of K-mouflage
• The two-body potential of Vainshtein screened theories
• The local dark sector. Probing gravitation's low-acceleration frontier and dark matter in the Solar System neighborhood
• Double screening
• Causal Modifications of Gravity and Their Observational Bounds
• Two-body problem in theories with kinetic screening
• K-mouflage at high $k$: extending the reach of $\text{Hi-COLA}$
• Lyman-alpha power spectrum as a probe of modified gravity
• Non-screening of the Cosmological Background in K-mouflage modified gravity
• Quintessence-Chameleon transitions in anisotropic Kiselev model of neutron stars