{
  "abstract": "Metric theories of gravity admit a massless breathing scalar $b$ besides the tensor modes $+$ and $\\times$. Many scalar--tensor models predict a much smaller breathing amplitude; gravitational quantum field theory (GQFT) instead allows $h_b$ comparable to the tensor amplitudes. We evaluate the LIGO--Virgo--KAGRA (LVK) antenna patterns with PyCBC, including Michelson suppression of $b$. Here $F_b$ is the breathing antenna pattern and $\\mathcal{S}_b=\\sum_d F_b^{d2}$ is the network breathing power. At the H1 zenith at the GW150914 epoch, $F_b\\sim 5\\times 10^{-6}$; for $72$ Gravitational-wave Transient Catalog (GWTC) events with packaged strain the median inclination gain in $\\mathcal{S}_b$ is $\\sim 34\\times$. Ranking multi-detector GWTC events (network $\\mathrm{SNR}\\ge 8$, $\\ge 2$ sites) by $\\mathrm{SNR}\\sqrt{\\mathcal{S}_b^{*}}$ identifies loud O4 triggers and GW170817 as geometric targets. Parameter-estimation (PE) weighted $\\mathcal{S}_b$ on twelve events shows that the true sky can suppress this ranking (GW170817) and that GW200129_065458, GW150914, and GW190814 have the highest PE-weighted $\\mathcal{S}_b$ for $ξ$ in $h_b=ξh_+$ (GR: $ξ\\equiv 0$). An HLV design-noise injection grid gives $\\ln B(\\mathrm{GR}+b/\\mathrm{GR})\\approx 13$ ($4$) for $ξ=1$ ($0.5$) on an inclined sky ($\\mathcal{S}_b\\sim 0.18$); near zenith ($\\mathcal{S}_b\\sim 0.016$) the $ξ$ posterior remains unconstrained. The GWTC limits are semi-joint: masses and spins fixed at PE medians, while $d_L$, $θ_{JN}$, sky, and $ξ$ vary within PE-informed priors. Eleven of twelve events are analyzed (GW170817 omitted: PE sky on the breathing null). None favors $\\mathrm{GR}+b$; $|ξ|_{90\\%}\\approx 0.15$, $0.18$, and $0.23$ for GW150914, GW200129_065458, and GW200311_115853 disfavor $|ξ|\\sim\\mathcal{O}(1)$, while weaker bounds (including GW190814) still allow that scale.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2610.08588",
  "author_total": 2,
  "authors": [
    {
      "name": "Hong-Bo Jin"
    },
    {
      "name": "Yanyan Zheng"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/c3kfw4zbabr4v.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.08588",
  "fulltext_url": null,
  "id": "c3kfw4zbabr4v",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.08588",
  "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.HE"
    ],
    [
      "arxiv",
      "gr-qc"
    ],
    [
      "openalex",
      "3103|Pulsars and Gravitational Waves Research"
    ]
  ],
  "openalex": "W7220967867",
  "pdf_url": "https://arxiv.org/pdf/2610.08588",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-06",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/c3kfw4zbabr4v.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:27:22Z",
      "native_id": "2610.08588",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.08588"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.HE",
      "subfield": "high-energy-astrophysics"
    },
    {
      "field": "physics",
      "origin": "arxiv:gr-qc",
      "subfield": "gravitation"
    }
  ],
  "title": "Constraining the gravitational-wave breathing mode with LVK antenna patterns and GWTC data",
  "title_text": "Constraining the gravitational-wave breathing mode with LVK antenna patterns and GWTC data",
  "type": "preprint",
  "updated_at": "2026-10-30T12:27:22Z",
  "url": "https://research.draconitic.com/paper/c3kfw4zbabr4v",
  "venue": "arXiv",
  "versions": []
}