Gravitationally induced particle creation models fit cosmological data as well as ΛCDM and reduce the Hubble tension from 4.3σ to 2.4–3σ.
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A scalar-vector-tensor theory with late-time-only scalar dynamics provides a mechanism to alleviate the Hubble tension in a unified dark sector framework.
The work derives background-level constraints showing that potential-driven early dark energy in F(R) gravity is generically excluded by local gravity tests.
Ghost-free non-local gravity fits Pantheon+, DESI, and H(z) data but fails with added CMB, while generalized exponential F(R) gravity outperforms Lambda CDM across all datasets including CMB.
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Unified dark sector and Hubble-tension alleviation in scalar-vector-tensor gravity
A scalar-vector-tensor theory with late-time-only scalar dynamics provides a mechanism to alleviate the Hubble tension in a unified dark sector framework.
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Theoretical and observational constraints on early dark energy in $F(R)$ gravity
The work derives background-level constraints showing that potential-driven early dark energy in F(R) gravity is generically excluded by local gravity tests.
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Dark Energy in Ghost-free non-local Gravity
Ghost-free non-local gravity fits Pantheon+, DESI, and H(z) data but fails with added CMB, while generalized exponential F(R) gravity outperforms Lambda CDM across all datasets including CMB.