{
  "abstract": "The ATLAS Collaboration has searched for Higgs-boson decays into a photon and missing transverse momentum using $135~\\mathrm{fb}^{-1}$ of Run~3 proton--proton collision data at $\\sqrt{s}=13.6~\\mathrm{TeV}$. For the benchmark decay $H\\toγ\\gD$ with a massless invisible dark photon, ATLAS reports observed (expected) 95\\% confidence-level limits of $1.4\\%$ ($1.2\\%$) on the branching fraction. We reinterpret this search for a massive detector-invisible dark photon with $0\\leq m_{\\gD}\\leq70~\\gev$, focusing on Higgs production through gluon--gluon fusion. \\audit{The relative signal acceptance, normalized to the massless benchmark, remains nearly unchanged up to $m_{\\gD}\\simeq40~\\gev$, but decreases to $0.888$, $0.736$, and $0.524$ at $50$, $60$, and $70~\\gev$, respectively, as the photon-$p_T$ and transverse-mass spectra move toward the analysis thresholds.} Using the published massless gluon--gluon-fusion yield for normalization, we obtain simplified expected (observed) 95\\% confidence-level limits on $\\BR(H\\toγ\\gD)$ from $1.64\\%$ ($1.76\\%$) at $m_{\\gD}=30~\\gev$ to $3.50\\%$ ($3.75\\%$) at $70~\\gev$. These results extend the ATLAS interpretation to massive invisible dark photons and quantify the resulting loss of sensitivity at large dark-photon mass.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.24527",
  "author_total": 3,
  "authors": [
    {
      "name": "Waqas Ahmed"
    },
    {
      "name": "Ammara Ahmad"
    },
    {
      "name": "Shabbar Raza"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/fhx44215hmsjp.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.24527",
  "fulltext_url": null,
  "id": "fhx44215hmsjp",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.24527",
  "language": null,
  "licence": "CC-BY-NC-SA-4.0",
  "licence_label": "CC BY-NC-SA 4.0",
  "licence_source": "article",
  "licence_url": "http://creativecommons.org/licenses/by-nc-sa/4.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "hep-ex"
    ],
    [
      "arxiv",
      "hep-ph"
    ],
    [
      "arxiv",
      "hep-th"
    ],
    [
      "openalex",
      "3106|Particle physics theoretical and experimental studies"
    ]
  ],
  "openalex": "W7214047694",
  "pdf_url": "https://arxiv.org/pdf/2609.24527",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-21",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/fhx44215hmsjp.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:23:19Z",
      "native_id": "2609.24527",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.24527"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:hep-ex",
      "subfield": "high-energy"
    }
  ],
  "title": "Probing Massive Invisible Dark Photons in Higgs Decays via Gluon--Gluon Fusion at ATLAS Run 3",
  "title_text": "Probing Massive Invisible Dark Photons in Higgs Decays via Gluon--Gluon Fusion at ATLAS Run 3",
  "type": "preprint",
  "updated_at": "2026-10-30T12:23:19Z",
  "url": "https://research.draconitic.com/paper/fhx44215hmsjp",
  "venue": "arXiv",
  "versions": []
}