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Dark Energy, Induced Gravity and Broken Scale Invariance

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arxiv 0710.2741 v2 pith:4YJ5EJZB submitted 2007-10-15 astro-ph gr-qchep-th

F. Finelli , A. Tronconi , G. Venturi This is my paper · ORCID
classification astro-phgr-qchep-th
keywords gravitymodelcosmologicalfieldgammainducedscalarsigma
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abstract

We study the cosmological evolution of an induced gravity model with a self-interacting scalar field $\sigma$ and in the presence of matter and radiation. Such model leads to Einstein Gravity plus a cosmological constant as a stable attractor among homogeneous cosmologies and is therefore a viable dark-energy (DE) model for a wide range of scalar field initial conditions and values for its positive $\gamma$ coupling to the Ricci curvature $\gamma \sigma^{2}R$.

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  1. Scalar-Tensor Gravity and DESI 2024 BAO data

    astro-ph.CO 2025-01 conditional novelty 6.0 of 10

    With Planck and DESI BAO data, the Brans-Dicke Galileon model prefers a nonzero Galileon term and yields H0 = 71.0 +1.5 -1.3 km/s/Mpc, consistent with SH0ES at 1.2 sigma.

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