{
  "abstract": "Nonlocal modifications of gravity provide a theoretically motivated framework in which cosmic acceleration can emerge dynamically without introducing a fundamental cosmological constant. We revisit the cosmological predictions of the Maggiore--Mancarella nonlocal $R\\,\\Box^{-2}R$ model, with particular emphasis on its background dynamics and observational viability in light of recent DESI baryon acoustic oscillation measurements. A key feature of the theory is its predictive character: for fixed standard cosmological parameters, each value of the nonlocal parameter determines a specific effective pair $(w_0,w_a)$, so that the model traces a restricted trajectory in the Chevallier--Polarski--Linder plane rather than spanning the full phenomenological parameter space. We construct this mapping explicitly and confront the model with observations by implementing its cosmological dynamics in a Boltzmann solver and performing a Markov chain Monte Carlo analysis using Cosmic Microwave Background, supernova, and DESI BAO data. We find that current datasets constrain the nonlocal parameter close to the $Λ$CDM limit, with no statistically significant preference for nonlocal deviations.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2610.20720",
  "author_total": 5,
  "authors": [
    {
      "name": "Luca Amendola"
    },
    {
      "name": "Ismael Ayuso"
    },
    {
      "name": "Amlan Chakraborty"
    },
    {
      "name": "Javier Rubio"
    },
    {
      "name": "Subinoy Das"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/fpvewdwxetwnr.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.20720",
  "fulltext_url": null,
  "id": "fpvewdwxetwnr",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.20720",
  "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",
      "astro-ph.CO"
    ],
    [
      "arxiv",
      "gr-qc"
    ],
    [
      "openalex",
      "3103|Cosmology and Gravitation Theories"
    ]
  ],
  "openalex": "W7222761483",
  "pdf_url": "https://arxiv.org/pdf/2610.20720",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-14",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/fpvewdwxetwnr.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:29:50Z",
      "native_id": "2610.20720",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.20720"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.CO",
      "subfield": "cosmology"
    },
    {
      "field": "physics",
      "origin": "arxiv:gr-qc",
      "subfield": "gravitation"
    }
  ],
  "title": "Nonlocal Gravity, Restricted CPL Dynamics and DESI Constraints",
  "title_text": "Nonlocal Gravity, Restricted CPL Dynamics and DESI Constraints",
  "type": "preprint",
  "updated_at": "2026-10-30T12:29:50Z",
  "url": "https://research.draconitic.com/paper/fpvewdwxetwnr",
  "venue": "arXiv",
  "versions": []
}