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Constraining the cosmological evolution of scalar-tensor theories with local measurements of the time variation of G

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arxiv 2004.14260 v2 pith:5H3KLJ3Y submitted 2020-04-29 astro-ph.CO

Constraining the cosmological evolution of scalar-tensor theories with local measurements of the time variation of G

classification astro-ph.CO
keywords constraintscosmologicalevolutionscalar-tensorscreeningtheoriestimeconstant
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We determine the conditions for which the constraints from lunar laser ranging on the time evolution of the local gravitational constant can be extrapolated to impose constraints on the time evolution of the cosmological gravitational constant in scalar-tensor theories of modified gravity. We allow for the possibility that the scalar-tensor theories are non-linear and contain a screening mechanism. This results in strong constraints on the running of the cosmological Planck mass described by the Horndeski function $|\alpha_M|\lesssim 0.002$. We find that our assumptions are valid for most Vainshtein and kinetic screening models, where the shift symmetry $\phi\rightarrow\phi + c$ holds, but are violated by some Chameleon and Symmetron screening models, where the macroscopic equivalence principle is broken.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. A Master Equation for Screening in Luminal Horndeski Gravity

    gr-qc 2026-05 unverdicted novelty 7.0

    A master screening equation is derived for luminal Horndeski gravity that recovers Vainshtein and Chameleon mechanisms and introduces Phaedrus screening with screening radius scaling linearly with source mass.

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