DESI and Dynamical Dark Energy from Extended Pre-geometric Gravity
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arXiv
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| Main Authors: | , , , , , |
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| Format: | Preprint |
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2026
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| author | Addazi, Andrea Aldabergenov, Yermek Berkimbayev, Daulet Cai, Yifu Capozziello, Salvatore Meluccio, Giuseppe |
| author_facet | Addazi, Andrea Aldabergenov, Yermek Berkimbayev, Daulet Cai, Yifu Capozziello, Salvatore Meluccio, Giuseppe |
| contents | We consider the simplest quadratic extension of MacDowell-Mansouri pre-geometric gravity preserving the topological pre-volume form symmetry. After symmetry breaking, it becomes $(\mathrm{Lovelock})^2$ gravity, dual to a Galileon-like Horndeski scalar-tensor theory. The gravitational Higgs mechanism forces the Gauss-Bonnet coupling to be inversely proportional to the bare cosmological constant. The quadratic correction renders the gravitational $θ$-angle dynamical in the form of a gravi-axion, whose effective mass sets the dark energy scale, thus naturally realizing a dynamical dark energy. The model fits DESI's BAO+FS data exceptionally well ($χ^2_{\rm red} = 1.394$), deviating from $Λ\mathrm{CDM}$ by only a few percent in the gravitational slip parameter $γ(z)$ with stable tensor perturbations. This analysis establishes a concrete, testable bridge between pre-geometric gravity and cosmic acceleration. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2605_07344 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | DESI and Dynamical Dark Energy from Extended Pre-geometric Gravity Addazi, Andrea Aldabergenov, Yermek Berkimbayev, Daulet Cai, Yifu Capozziello, Salvatore Meluccio, Giuseppe General Relativity and Quantum Cosmology High Energy Physics - Theory We consider the simplest quadratic extension of MacDowell-Mansouri pre-geometric gravity preserving the topological pre-volume form symmetry. After symmetry breaking, it becomes $(\mathrm{Lovelock})^2$ gravity, dual to a Galileon-like Horndeski scalar-tensor theory. The gravitational Higgs mechanism forces the Gauss-Bonnet coupling to be inversely proportional to the bare cosmological constant. The quadratic correction renders the gravitational $θ$-angle dynamical in the form of a gravi-axion, whose effective mass sets the dark energy scale, thus naturally realizing a dynamical dark energy. The model fits DESI's BAO+FS data exceptionally well ($χ^2_{\rm red} = 1.394$), deviating from $Λ\mathrm{CDM}$ by only a few percent in the gravitational slip parameter $γ(z)$ with stable tensor perturbations. This analysis establishes a concrete, testable bridge between pre-geometric gravity and cosmic acceleration. |
| title | DESI and Dynamical Dark Energy from Extended Pre-geometric Gravity |
| topic | General Relativity and Quantum Cosmology High Energy Physics - Theory |
| url | https://arxiv.org/abs/2605.07344 |