{
  "abstract": "We investigate the minimal composite Higgs model based on the symmetry-breaking pattern $${\\textrm{SU}}(4)\\rightarrow {\\textrm{Sp}}(4),$$ where electroweak symmetry breaking is governed by the vacuum alignment angle $$\\theta .$$ Through the leading-order relations $$\\kappa _V=\\cos \\theta $$ and $$m_\\eta =m_h/\\sin \\theta ,$$ precision measurements of Higgs couplings constrain the vacuum structure and, within this leading-order realization, the singlet pseudo-Nambu–Goldstone boson mass. Using the current ATLAS Run-2 measurement of $$\\kappa _V,$$ we construct a Bayesian posterior for $$\\theta ,$$ including the Jacobian from the transformation $$\\kappa _V\\rightarrow \\theta $$ (assuming a flat prior in $$\\kappa _V$$). We cross-check these results with an independent frequentist $$\\Delta \\chi ^2$$ analysis; the two approaches yield consistent bounds on $$\\theta $$. The same framework is applied to the projected sensitivities of the High-Luminosity LHC and FCC-ee. The current data imply a lower bound of approximately 440 GeV on the singlet mass at the 95% credibility level, conservative under the flat prior in $$\\kappa _V$$ with boundary truncation. The HL-LHC improves this to about 600 GeV, while FCC-ee reaches beyond 2 TeV as an indicative projected sensitivity. While the constraint on $$\\theta $$ is comparatively model-independent, these $$m_\\eta $$ bounds hold within the specific leading-order potential considered here. Our results show that future Higgs precision measurements will probe the vacuum alignment of the minimal $${\\textrm{SU}}(4)/{\\textrm{Sp}}(4)$$ composite Higgs model with unprecedented sensitivity. They place increasingly stringent indirect constraints on the singlet mass, whose direct collider phenomenology depends on additional model-dependent couplings.",
  "abstract_shown": true,
  "affiliations": [
    "Shahrood University of Technology",
    "Sorbonne Université and CNRS"
  ],
  "article_type": null,
  "arxiv": null,
  "author_total": 3,
  "authors": [
    {
      "affs": [
        0
      ],
      "name": "Reza Asgharzadeh Jelodar"
    },
    {
      "affs": [
        0
      ],
      "name": "Kazem Bitaghsir Fadafan",
      "orcid": "0000-0001-9835-7128"
    },
    {
      "affs": [
        1
      ],
      "name": "Giacomo Cacciapaglia",
      "orcid": "0000-0002-3426-1618"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/bdrf05fhghtvm.bib",
  "cited_by": 0,
  "doi": "10.1140/epjc/s10052-026-16487-1",
  "fulltext_url": null,
  "id": "bdrf05fhghtvm",
  "issns": [
    "1434-6052"
  ],
  "landing_url": "https://link.springer.com/article/10.1140/epjc/s10052-026-16487-1",
  "language": null,
  "licence": "CC-BY-4.0",
  "licence_label": "CC BY 4.0",
  "licence_source": "article",
  "licence_url": "https://creativecommons.org/licenses/by/4.0",
  "metadata_licence": null,
  "native_subjects": [
    [
      "feed-journal",
      "physics/high-energy"
    ]
  ],
  "openalex": null,
  "pdf_url": "https://link.springer.com/content/pdf/10.1140/epjc/s10052-026-16487-1.pdf",
  "pmcid": null,
  "pmid": null,
  "published": "2026-11-09",
  "publisher": "Springer Science and Business Media LLC",
  "ris": "https://research.draconitic.com/paper/bdrf05fhghtvm.ris",
  "sources": [
    {
      "first_seen": "2026-11-09T12:20:30Z",
      "native_id": "10.1140/epjc/s10052-026-16487-1",
      "source": "feed-springer",
      "url": "https://link.springer.com/article/10.1140/epjc/s10052-026-16487-1"
    },
    {
      "first_seen": "2026-11-09T12:21:17Z",
      "native_id": "10.1140/epjc/s10052-026-16487-1",
      "source": "crossref",
      "url": "https://link.springer.com/article/10.1140/epjc/s10052-026-16487-1"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "feed-journal:physics/high-energy",
      "subfield": "high-energy"
    }
  ],
  "title": "Impact of Higgs precision measurements at the LHC and FCC-ee on the spectrum of composite Higgs models",
  "title_text": "Impact of Higgs precision measurements at the LHC and FCC-ee on the spectrum of composite Higgs models",
  "type": "peer-reviewed",
  "updated_at": "2026-11-09T12:21:17Z",
  "url": "https://research.draconitic.com/paper/bdrf05fhghtvm",
  "venue": "The European Physical Journal C",
  "versions": []
}