{
  "abstract": "We consider the simplest quadratic extension of MacDowell--Mansouri pre-geometric gravity that preserves the topological pre-volume-form symmetry. Upon symmetry breaking, the theory reduces to $(\\mathrm{Lovelock})^2$ gravity and admits a Galileon-like Horndeski scalar-tensor representation. The gravitational Higgs mechanism relates the Gauss--Bonnet coupling to the bare cosmological constant, while the quadratic correction elevates the gravitational $θ$-angle to a dynamical gravi-axion whose ultra-light mass scale can drive late-time acceleration. We confront the Jordan-frame background with DESI DR2 baryon-acoustic-oscillation measurements and an auxiliary six-point compressed growth diagnostic. A transient dark-energy response localized near $H\\simeq m_b$ ($m_b$ the effective gravi-axion mass) reproduces the fitted expansion and its BAO-distance predictions and becomes negligible at high redshift. For the full linear calculation, we combine a smooth positive-density representative of this response class with explicitly imposed GR-like tensor and local sectors, together with the parameterized post-Friedmann prescription. The resulting gravi-axion benchmark exhibits a transient effective phantom crossing and admits a regular full linear CAMB evolution. Its separate likelihood contributions are promising relative to those obtained from the flat-$Λ$CDM baseline for the same data set. These results establish the dynamical gravi-axion framework, dual to MacDowell--Mansouri pre-geometric gravity, as a viable effective quantum-gravity inspired description of late-time cosmology, motivating further investigation into its fundamental origin and perturbative consistency.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2605.07344",
  "author_total": 6,
  "authors": [
    {
      "name": "Andrea Addazi"
    },
    {
      "name": "Yermek Aldabergenov"
    },
    {
      "name": "Daulet Berkimbayev"
    },
    {
      "name": "Yifu Cai"
    },
    {
      "name": "Salvatore Capozziello"
    },
    {
      "name": "Giuseppe Meluccio"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/30pdjdazr0jv7.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2605.07344",
  "fulltext_url": null,
  "id": "30pdjdazr0jv7",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2605.07344",
  "language": null,
  "licence": "LicenseRef-arXiv-nonexclusive-1.0",
  "licence_label": "arXiv licence",
  "licence_source": "article",
  "licence_url": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "gr-qc"
    ],
    [
      "arxiv",
      "hep-th"
    ],
    [
      "openalex",
      "3103|Cosmology and Gravitation Theories"
    ]
  ],
  "openalex": "W7160832130",
  "pdf_url": "https://arxiv.org/pdf/2605.07344",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-17",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/30pdjdazr0jv7.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:22:19Z",
      "native_id": "2605.07344",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2605.07344"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:gr-qc",
      "subfield": "gravitation"
    },
    {
      "field": "physics",
      "origin": "arxiv:hep-th",
      "subfield": "high-energy"
    }
  ],
  "title": "DESI and Dynamical Dark Energy from Extended Pre-geometric Gravity",
  "title_text": "DESI and Dynamical Dark Energy from Extended Pre-geometric Gravity",
  "type": "preprint",
  "updated_at": "2026-10-30T12:22:19Z",
  "url": "https://research.draconitic.com/paper/30pdjdazr0jv7",
  "venue": "arXiv",
  "versions": []
}