{
  "abstract": "Schouten--Codazzi gravity (SCG) admits a cosmological background that extends flat $Λ$CDM by one integration constant, $γ_0$. Its contribution to the Friedmann equation scales as $(1+z)$ and corresponds to an effective component with equation of state $w_{γ_0}=-2/3$. We constrain this extension using 15 combinations of Type~Ia supernovae, DESI~DR2 baryon acoustic oscillations, and compressed cosmic microwave background information, supplemented by a big-bang nucleosynthesis prior as specified in the analysis. Supernovae paired with either BAO or CMB favor positive $Ω_{γ_0}\\equivγ_0/H_0^2$, with approximate marginal departures from zero of $1.7$--$3.2σ$. In contrast, all three supernovae$+$BAO$+$CMB combinations are consistent with $Ω_{γ_0}=0$ within their 68\\% credible intervals. Their central log Bayes factors favor $Λ$CDM, with $Δ\\ln\\mathcal{Z}$ between $-2.54$ and $-1.13$, and the inferred Hubble constants remain close to those of the corresponding $Λ$CDM fits. These results provide a background-level test of SCG conditional on the adopted priors and likelihood approximations, particularly the model assumptions entering the CMB compression.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2610.36002",
  "author_total": 7,
  "authors": [
    {
      "name": "Andoni Fontanet"
    },
    {
      "name": "Andrea Valencia"
    },
    {
      "name": "Shahnawaz A. Adil"
    },
    {
      "name": "Sebastián Nájera"
    },
    {
      "name": "Roberto A. Sussman"
    },
    {
      "name": "J. Alberto Vázquez"
    },
    {
      "name": "Juan Carlos Hidalgo"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/16wef3ns29e1a.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.36002",
  "fulltext_url": null,
  "id": "16wef3ns29e1a",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.36002",
  "language": null,
  "licence": "CC-BY-4.0",
  "licence_label": "CC BY 4.0",
  "licence_source": "article",
  "licence_url": "http://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "physics.gen-ph"
    ],
    [
      "openalex",
      "3103|Cosmology and Gravitation Theories"
    ]
  ],
  "openalex": "W7224086863",
  "pdf_url": "https://arxiv.org/pdf/2610.36002",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-26",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/16wef3ns29e1a.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:35:50Z",
      "native_id": "2610.36002",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.36002"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "openalex:3103|Cosmology and Gravitation Theories",
      "subfield": "cosmology"
    }
  ],
  "title": "Testing Schouten--Codazzi Gravity: Cosmological Constraints and Deviations from $Λ$CDM",
  "title_text": "Testing Schouten--Codazzi Gravity: Cosmological Constraints and Deviations from ΛCDM",
  "type": "preprint",
  "updated_at": "2026-10-30T12:35:50Z",
  "url": "https://research.draconitic.com/paper/16wef3ns29e1a",
  "venue": "arXiv",
  "versions": []
}