{
  "abstract": "We propose the rare SM Higgs decay $H\\to b\\bar b b\\bar b$ as a probe of the structure of Higgs interactions with bottom quarks and gauge bosons, and as a baseline for searches for new physics producing four-bottom final states in Higgs decays. We compute the leading contributions to this decay, including the dominant $H\\to b\\bar b g\\to b\\bar b b\\bar b$ topology, the sizeable $H\\to ZZ^\\ast\\to b\\bar b b\\bar b$ channel, and the loop-induced $H\\to gg\\to b\\bar b b\\bar b$ contribution. We find a branching ratio of order $1.6\\times10^{-3}$ and show that destructive interference among the leading amplitudes is phenomenologically relevant. We demonstrate that this decay can be probed in associated Higgs production at both the HL-LHC and the ILC. For $pp\\to WH\\to Wb\\bar b b\\bar b$ at $\\sqrt{s}=14$ TeV, we use a multivariate analysis based on boosted decision trees to exploit correlations among the four-$b$ kinematic observables. At $3000~{\\rm fb}^{-1}$, the statistical significance reaches about $3.5$, while a tighter high-purity working point gives $S/B\\simeq5\\%$ with significance close to $3σ$. A combined high-luminosity LHC dataset could therefore make this rare decay observable. For $e^+e^-\\to ZH\\to Zb\\bar b b\\bar b$ at the ILC with $\\sqrt{s}=250$ GeV, we demonstrate that the cleaner collider environment gives a high-purity signal sample. In the nominal setup, the multivariate analysis gives a significance above $5σ$ already at $300~{\\rm fb}^{-1}$. At integrated luminosities of order $1-3~{\\rm ab}^{-1}$, the branching ratio can be measured with several-percent precision.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2605.19935",
  "author_total": 4,
  "authors": [
    {
      "name": "Eduard Boos"
    },
    {
      "name": "Vyacheslav Bunichev"
    },
    {
      "name": "Guliya Nurbakova"
    },
    {
      "name": "Saniya Rustembayeva"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/641rmbrhmkty4.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2605.19935",
  "fulltext_url": null,
  "id": "641rmbrhmkty4",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2605.19935",
  "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",
      "hep-ex"
    ],
    [
      "arxiv",
      "hep-ph"
    ],
    [
      "arxiv",
      "hep-th"
    ],
    [
      "openalex",
      "3106|Particle physics theoretical and experimental studies"
    ]
  ],
  "openalex": "W7161753126",
  "pdf_url": "https://arxiv.org/pdf/2605.19935",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-11",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/641rmbrhmkty4.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:21:07Z",
      "native_id": "2605.19935",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2605.19935"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:hep-ex",
      "subfield": "high-energy"
    }
  ],
  "title": "Probing the Rare Four-Bottom Higgs Decay $H\\to b\\bar b b\\bar b$ at the HL-LHC and ILC",
  "title_text": "Probing the Rare Four-Bottom Higgs Decay H→ bb̅ bb̅ at the HL-LHC and ILC",
  "type": "preprint",
  "updated_at": "2026-10-30T12:21:07Z",
  "url": "https://research.draconitic.com/paper/641rmbrhmkty4",
  "venue": "arXiv",
  "versions": []
}