{
  "abstract": "The total decay width of the Higgs boson, $Γ_H$, encodes all of its decay modes; any decay into particles beyond the Standard Model (SM) would increase $Γ_H$ above the SM prediction of 4.1 MeV. In this Letter, a direct, on-shell measurement of $Γ_H$ is reported, exploiting the interference between the resonant $H \\to γγ$ amplitude and the continuum diphoton background, which distorts the diphoton invariant mass distribution in a way that depends on $Γ_H$ without requiring assumptions on the Higgs boson couplings. Using 140 fb$^{-1}$ of proton-proton collision data at $\\sqrt{s}=13$ TeV recorded by the ATLAS detector during Run 2 of the LHC, an observed (expected) upper limit of $Γ_H < 307$ (258) MeV is set at 95% confidence level, approximately 75 (63) times the SM prediction. Unlike indirect off-shell constraints on $Γ_H$, this measurement does not rely on assumptions about the Higgs boson couplings, providing a novel complementary probe sensitive to potential Higgs boson decays into new particles.",
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  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.19948",
  "author_total": 2884,
  "authors": [
    {
      "name": "Georges Aad"
    },
    {
      "name": "Erlend Aakvaag"
    },
    {
      "name": "Braden Keim Abbott"
    },
    {
      "name": "Sara Abdelhameed"
    },
    {
      "name": "Kira Abeling"
    },
    {
      "name": "Nils Julius Abicht"
    },
    {
      "name": "Haider Abidi"
    },
    {
      "name": "Mohammed Aboelela"
    },
    {
      "name": "Asmaa Aboulhorma"
    },
    {
      "name": "Halina Abramowicz"
    },
    {
      "name": "Bobby Samir Acharya"
    },
    {
      "name": "Anke Ackermann"
    },
    {
      "name": "Jona Ackerschott"
    },
    {
      "name": "Claire Adam Bourdarios"
    },
    {
      "name": "Leszek Adamczyk"
    },
    {
      "name": "Sagar Addepalli"
    },
    {
      "name": "Jahred Adelman"
    },
    {
      "name": "Habeeb Adenle"
    },
    {
      "name": "Aytul Adiguzel"
    },
    {
      "name": "Tim Adye"
    },
    {
      "name": "Tony Affolder"
    },
    {
      "name": "Yoav Afik"
    },
    {
      "name": "Merve Nazlim Agaras"
    },
    {
      "name": "Anamika Aggarwal"
    },
    {
      "name": "Catalin Agheorghiesei"
    },
    {
      "name": "Ammara Ahmad"
    },
    {
      "name": "Faig Ahmadov"
    },
    {
      "name": "Sonakshi Ahuja"
    },
    {
      "name": "Xiaocong Ai"
    },
    {
      "name": "Giulio Aielli"
    },
    {
      "name": "Arya Aikot"
    },
    {
      "name": "Malak Ait Tamlihat"
    },
    {
      "name": "Torsten Akesson"
    },
    {
      "name": "Daiya Akiyama"
    },
    {
      "name": "Sina Aktas"
    },
    {
      "name": "Gian Luigi Alberghi"
    },
    {
      "name": "Justin Albert"
    },
    {
      "name": "Una Helena Alberti"
    },
    {
      "name": "Pietro Albicocco"
    },
    {
      "name": "Sara Alderweireldt"
    },
    {
      "name": "Zackary Lee Alegria"
    },
    {
      "name": "Martin Aleksa"
    },
    {
      "name": "Igor Alexandrov"
    },
    {
      "name": "Calin Alexa"
    },
    {
      "name": "Theodoros Alexopoulos"
    },
    {
      "name": "Fabrizio Alfonsi"
    },
    {
      "name": "Malte Algren"
    },
    {
      "name": "Muhammad Alhroob"
    },
    {
      "name": "Babar Ali"
    },
    {
      "name": "Hanadi Ali"
    },
    {
      "name": "Shahzad Ali"
    },
    {
      "name": "Samuel William Alibocus"
    },
    {
      "name": "Malik Aliev"
    },
    {
      "name": "Gianluca Alimonti"
    },
    {
      "name": "Corentin Allaire"
    },
    {
      "name": "Benedict Allbrooke"
    },
    {
      "name": "Derrick Allen"
    },
    {
      "name": "Jonny Allen"
    },
    {
      "name": "Camron Stephen Alley"
    },
    {
      "name": "Earl Russel Tang Almazan"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/0y4gxqkgsj2a4.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.19948",
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  "landing_url": "https://hal.science/hal-05763125v1",
  "language": "en",
  "licence": "CC-BY-4.0",
  "licence_label": "CC BY 4.0",
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  "openalex": "W7213590794",
  "pdf_url": "https://arxiv.org/pdf/2609.19948",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-17",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/0y4gxqkgsj2a4.ris",
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    {
      "first_seen": "2026-10-30T12:17:40Z",
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      "url": "https://arxiv.org/abs/2609.19948"
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  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:hep-ex",
      "subfield": "high-energy"
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  ],
  "title": "Constraints on the Higgs boson total width from on-shell signal-background interference in the $H\\toγγ$ decay channel with $pp$ collisions at $\\sqrt{s}=13$ TeV with the ATLAS detector",
  "title_text": "Constraints on the Higgs boson total width from on-shell signal-background interference in the H→γγ decay channel with pp collisions at √s=13 TeV with the ATLAS detector",
  "type": "preprint",
  "updated_at": "2026-10-30T12:22:19Z",
  "url": "https://research.draconitic.com/paper/0y4gxqkgsj2a4",
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