{
  "abstract": "Recent LHC measurements of $tWZ$, $t\\bar t Z$ and single top production provide complementary probes of top quark electroweak interactions. We incorporate these measurements into a global Standard Model effective field theory analysis of 46 independent dimension-six Wilson coefficients at linear order. The updated fit remains compatible with the Standard Model at $95\\%$ CL, and favors negative values of $C_{Hq}^{(-)}\\equiv C_{Hq}^{(1)}-C_{Hq}^{(3)}$ and $C_{Ht}$, with central values suggestive of TeV scale new physics. We also present an effective composite Higgs model based on a two-site description that realizes this pattern of Wilson coefficients through partial compositeness. The model includes custodial symmetry and protection of the $Z\\bar b_L b_L$ coupling. A fermion bitriplet generates the required left-handed shift, and an additional embedding of the right-handed top allows negative contributions to $C_{Ht}$ from both fermion and spin-one exchange. Scanning four right-handed top embeddings, we find parameter regions within the $68\\%$ CL contour that are compatible with electroweak precision data, Higgs coupling measurements and applicable direct searches. The $T$ parameter limits the negative fermionic contribution to $C_{Ht}$, favoring a spin-one contribution of comparable or greater magnitude. Larger $SU(2)_R$ representations extend the reach toward negative $C_{Ht}$, and also enhance four-quark interactions that increase the four-top cross section, in the direction favored by current measurements. The mechanism connects the preferred top electroweak shifts to complementary tests through single production of quarks with electric charge $-4/3$, modified Higgs couplings and four-top production.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2611.05500",
  "author_total": 2,
  "authors": [
    {
      "name": "Leandro Da Rold"
    },
    {
      "name": "Juan Fernandez"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/103nr377k7a5w.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2611.05500",
  "fulltext_url": null,
  "id": "103nr377k7a5w",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2611.05500",
  "language": null,
  "licence": "LicenseRef-arXiv-nonexclusive-1.0",
  "licence_label": "arXiv licence",
  "licence_source": "article",
  "licence_url": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "hep-ph"
    ]
  ],
  "openalex": null,
  "pdf_url": "https://arxiv.org/pdf/2611.05500",
  "pmcid": null,
  "pmid": null,
  "published": "2026-11-03",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/103nr377k7a5w.ris",
  "sources": [
    {
      "first_seen": "2026-11-05T15:20:56Z",
      "native_id": "2611.05500",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2611.05500"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:hep-ph",
      "subfield": "high-energy"
    }
  ],
  "title": "SMEFT Constraints on Top Electroweak Couplings and a Composite Higgs Interpretation",
  "title_text": "SMEFT Constraints on Top Electroweak Couplings and a Composite Higgs Interpretation",
  "type": "preprint",
  "updated_at": "2026-11-07T18:20:05Z",
  "url": "https://research.draconitic.com/paper/103nr377k7a5w",
  "venue": "arXiv",
  "versions": []
}