{
  "abstract": "By performing a fit to the merged BES 2008 and BESIII 2024 $e^+e^-\\to D\\bar D$ cross-section data, we find that the $ψ(2\\mathrm S)$ subthreshold pole influences this process markedly. The statistical significance of the $ψ(2\\mathrm S)$ as a subthreshold pole is 8$σ$. A fit assuming it and seven resonances excels with the fit quality characterized by $χ^2/\\mathrm{DOF}=240.4/284$, which means a $p$-value of 97\\%. The interference of resonances with the continuum provided by the subthreshold pole changes their shapes, positions, and widths.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": "Journal reference: Phys. Lett. B 882, 140977 (2026)",
  "arxiv": "2609.37760",
  "author_total": 1,
  "authors": [
    {
      "name": "Peter Lichard"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/akbaar2mah66w.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.37760",
  "fulltext_url": null,
  "id": "akbaar2mah66w",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.37760",
  "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/2609.37760",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-29",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/akbaar2mah66w.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:25:31Z",
      "native_id": "2609.37760",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.37760"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:hep-ph",
      "subfield": "high-energy"
    }
  ],
  "title": "The $ψ$(2S) state as a subthreshold pole in electron positron annihilation into $D\\bar D$ final states",
  "title_text": "The ψ(2S) state as a subthreshold pole in electron positron annihilation into DD̅ final states",
  "type": "preprint",
  "updated_at": "2026-10-30T12:25:31Z",
  "url": "https://research.draconitic.com/paper/akbaar2mah66w",
  "venue": "arXiv",
  "versions": [
    {
      "doi": "10.1016/j.physletb.2026.140977",
      "pid": null,
      "relation": "published-as",
      "title": null,
      "venue": null
    }
  ]
}