{
  "abstract": "Like the Gell-Mann--Low coupling $α$ of QED, the effective charge $α_{g_1}$ is a physical, observable-defined running coupling that can serve as the QCD coupling $α_s$. It can be represented by an analytic form consistent with renormalization-group evolution, holographic light-front QCD (HLFQCD), and the world data on $α_s$. As an observable, $α_{g_1}$ has a physically relevant analytic structure that reflects the underlying partonic dynamics. It displays, in the long-distance regime, two imaginary conjugate singularities at $Q^2 = \\pm iΛ_s^2$, with $Λ_s$ the QCD scale. To connect this structure to confinement, we combine known general relations between $α_{g_1}$ and the parton dressed propagators and vertices with a recent phenomenological representation of $α_{g_1}$ within HLFQCD. Since, unlike vertices, propagators characterize a field variation between separate locations, the two singularities are assigned to the propagators. This results in the parton propagators displaying a long-distance behavior $e^{-Λ_s |x|/\\sqrt{2}} |x|^{-5/2 + d_a}$ where propagation is suppressed beyond distances of order $1/Λ_s$, as expected from confinement. This offers an intuitive interpretation of confinement as the suppression of QCD Green's functions at long distance.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2607.05144",
  "author_total": 1,
  "authors": [
    {
      "name": "A. Deur"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/7y1kh5bzvp2kx.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2607.05144",
  "fulltext_url": null,
  "id": "7y1kh5bzvp2kx",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2607.05144",
  "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-ph"
    ]
  ],
  "openalex": null,
  "pdf_url": "https://arxiv.org/pdf/2607.05144",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-29",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/7y1kh5bzvp2kx.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:36:22Z",
      "native_id": "2607.05144",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2607.05144"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:hep-ph",
      "subfield": "high-energy"
    }
  ],
  "title": "Insight on confinement from the QCD effective charge",
  "title_text": "Insight on confinement from the QCD effective charge",
  "type": "preprint",
  "updated_at": "2026-11-01T12:20:44Z",
  "url": "https://research.draconitic.com/paper/7y1kh5bzvp2kx",
  "venue": "arXiv",
  "versions": [
    {
      "doi": "10.1016/j.physletb.2026.140972",
      "pid": "bwnj18q9pc3zp",
      "relation": "published-as",
      "title": "Insight on confinement from the QCD effective charge",
      "venue": "Physics Letters B"
    }
  ]
}