{
  "abstract": "We present a quotient-space Bayesian formulation for DESI-era anomaly interpretation. Given a pattern-labeled catalog with map \\(i\\mapsto \\Act(i)\\), the induced posterior \\(p(\\Act\\mid D)\\), sector inclusion probabilities \\(P_α\\), co-activation probabilities \\(P_{αβ}\\), and grouped Bayes factors \\(B_α(D)\\) are exact summaries over predeclared physical activation events. Pairwise comparisons such as \\(\\lcdm\\) versus \\(\\wacdm\\) remain ordinary Bayes-factor tests between specified families; the quotient construction addresses the coarser question of which physical sector carries posterior support when different sectors are represented by unequal numbers of catalog elements. We derive a sector-resolved DESI-CMB-SN likelihood specification for late-time background, early-time ruler, supernova calibration, perturbation, and gravitational-wave propagation sectors. The construction includes an Alcock-Paczynski/isotropic-scale BAO decomposition, a pure-ruler projection, analytic marginalization of low-rank supernova calibration modes, Fisher-normalized sector priors, inactive-sector leakage tests, log-evidence uncertainty propagation, and prior/sector-partition diagnostics. The result is a quantitative procedure for reporting model-comparison support at the level of physically interpretable sectors.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": "Journal reference: Phys. Rev. D 114, 063505 (2026)",
  "arxiv": "2609.09045",
  "author_total": 1,
  "authors": [
    {
      "name": "Slava G. Turyshev"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/a3g3b4gm8p3wg.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.09045",
  "fulltext_url": null,
  "id": "a3g3b4gm8p3wg",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.09045",
  "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",
      "physics.gen-ph"
    ]
  ],
  "openalex": null,
  "pdf_url": "https://arxiv.org/pdf/2609.09045",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-08",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/a3g3b4gm8p3wg.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:19:52Z",
      "native_id": "2609.09045",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.09045"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:physics.gen-ph",
      "subfield": "general"
    }
  ],
  "title": "Sector-Resolved Bayesian Model Averaging for DESI-Era Cosmology",
  "title_text": "Sector-Resolved Bayesian Model Averaging for DESI-Era Cosmology",
  "type": "preprint",
  "updated_at": "2026-10-30T12:19:52Z",
  "url": "https://research.draconitic.com/paper/a3g3b4gm8p3wg",
  "venue": "arXiv",
  "versions": [
    {
      "doi": "10.1103/1x24-4mrv",
      "pid": null,
      "relation": "published-as",
      "title": null,
      "venue": null
    }
  ]
}