{
  "abstract": "We investigate the impact of modified gravity on the stochastic gravitational-wave background (SGWB) generated by a cosmological population of unresolved binary black hole mergers. We consider two complementary classes of beyond-General Relativity (GR) effects: waveform-generation modifications described within the parametrized post-Einsteinian (ppE) framework and cosmological propagation effects associated with a modified gravitational-wave luminosity distance. Astrophysical uncertainties in the binary black hole population are consistently incorporated using a Power-Law plus Peak mass model combined with a Madau--Dickinson merger-rate evolution. Using SGWB forecasts for Advanced LIGO, the Einstein Telescope (ET), and Cosmic Explorer (CE), we perform injection-recovery analyses jointly varying modified-gravity and astrophysical population parameters. We show that frequency-dependent ppE corrections produce characteristic distortions in the SGWB spectral shape and can be meaningfully constrained by third-generation detectors, particularly CE. In contrast, modified propagation effects mainly induce smooth amplitude rescalings and exhibit stronger degeneracies with astrophysical uncertainties. Our results demonstrate that future SGWB observations will provide a complementary probe of gravitational physics across cosmic history and may open new avenues for testing deviations from GR beyond individually resolved compact-binary events.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": "Journal reference: Phys. Rev. D. 114 (2026) 064091",
  "arxiv": "2607.05331",
  "author_total": 2,
  "authors": [
    {
      "name": "Rodrigo Fraga"
    },
    {
      "name": "Rafael C. Nunes"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/9g3caxwh6erd8.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2607.05331",
  "fulltext_url": null,
  "id": "9g3caxwh6erd8",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2607.05331",
  "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",
      "astro-ph.CO"
    ],
    [
      "arxiv",
      "gr-qc"
    ]
  ],
  "openalex": null,
  "pdf_url": "https://arxiv.org/pdf/2607.05331",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-30",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/9g3caxwh6erd8.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:25:48Z",
      "native_id": "2607.05331",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2607.05331"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.CO",
      "subfield": "cosmology"
    },
    {
      "field": "physics",
      "origin": "arxiv:gr-qc",
      "subfield": "gravitation"
    }
  ],
  "title": "Modeling Uncertainties in Modified Gravity Predictions for the Stochastic Gravitational-Wave Background",
  "title_text": "Modeling Uncertainties in Modified Gravity Predictions for the Stochastic Gravitational-Wave Background",
  "type": "preprint",
  "updated_at": "2026-10-30T12:25:48Z",
  "url": "https://research.draconitic.com/paper/9g3caxwh6erd8",
  "venue": "arXiv",
  "versions": [
    {
      "doi": "10.1103/fftm-rssv",
      "pid": null,
      "relation": "published-as",
      "title": null,
      "venue": null
    }
  ]
}