{
  "abstract": "Spin priors play a fundamental role in gravitational-wave parameter estimation, yet their impact on parameterized tests of General Relativity (GR) remains insufficiently understood. We systematically investigate how spin-prior choices affect the 1.5PN deviation parameter $δ\\hatϕ_3$ using real gravitational-wave events. Prior-induced effects are quantified through the Jensen--Shannon divergence and posterior median shifts. We find that $χ_p$ is significantly more sensitive to the spin prior than $χ_{\\rm eff}$, while $δ\\hatϕ_3$ is generally robust but can exhibit larger shifts in low-information regimes. GW231123_135430 shows particularly strong sensitivity, but its inferred properties are subject to waveform-model and event-specific systematics, warranting caution in interpreting results strongly influenced by this event. When $δ\\hatϕ_3$ is included in the parameter-estimation model, a strong correlation emerges between the prior sensitivities of $χ_{\\rm eff}$ and $δ\\hatϕ_3$, consistent with their partial degeneracy at the 1.5PN order, whereas $χ_p$ remains weakly correlated. A leave-one-out test shows that GW231123\\_135430 significantly affects the correlation strength, but the correlation persists when this event is removed. These results demonstrate that spin-prior choices can propagate into parameterized tests of GR and should be carefully accounted for when interpreting apparent deviations from GR.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": "Journal reference: Phys. Lett. B 882 (2026) 141022",
  "arxiv": "2605.04579",
  "author_total": 2,
  "authors": [
    {
      "name": "Tian-Hao Wu"
    },
    {
      "name": "Shu-Jun Rong"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/014mpxqcq6t0c.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2605.04579",
  "fulltext_url": null,
  "id": "014mpxqcq6t0c",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2605.04579",
  "language": null,
  "licence": "CC-BY-NC-ND-4.0",
  "licence_label": "CC BY-NC-ND 4.0",
  "licence_source": "article",
  "licence_url": "http://creativecommons.org/licenses/by-nc-nd/4.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "gr-qc"
    ]
  ],
  "openalex": null,
  "pdf_url": "https://arxiv.org/pdf/2605.04579",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-08",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/014mpxqcq6t0c.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:28:36Z",
      "native_id": "2605.04579",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2605.04579"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:gr-qc",
      "subfield": "gravitation"
    }
  ],
  "title": "The Impact of Spin Priors on Parameterized Tests of General Relativity",
  "title_text": "The Impact of Spin Priors on Parameterized Tests of General Relativity",
  "type": "preprint",
  "updated_at": "2026-10-30T12:28:36Z",
  "url": "https://research.draconitic.com/paper/014mpxqcq6t0c",
  "venue": "arXiv",
  "versions": [
    {
      "doi": "10.1016/j.physletb.2026.141022",
      "pid": "6yrgd705be8ej",
      "relation": "published-as",
      "title": "The impact of spin priors on parameterized tests of general relativity",
      "venue": "Physics Letters B"
    }
  ]
}