{
  "abstract": "The nature of the scalar charmed meson $D_0^*(2300)$ remains one of the most intriguing questions in hadron spectroscopy. A prominent interpretation is a two-pole structure generated by the coupled channels $Dπ$, $Dη$, $D_s\\bar K$, and $Dη'$, in which the lower pole couples mainly to $Dπ$ and the higher pole to $D_s\\bar K$. Following this picture, we calculate the decay constants of these two poles using the effective Lagrangian approach. The resulting values, $f_{D_0^*}^{(\\mathrm{lower})}=68.46^{+0.93}_{-1.25}\\,\\mathrm{MeV}$ and $f_{D_0^*}^{(\\mathrm{higher})}=90.51^{+5.91}_{-11.64}\\,\\mathrm{MeV}$, are substantially smaller than those predicted by conventional $c\\bar q$ excited-state scenarios. This difference suggests that decay constants can serve as a sensitive probe to discriminate between different internal structures of the $D_0^*(2300)$. As a phenomenological application, we further predict the branching fractions for the Cabibbo-favored decays $B_s \\to D_s D_0^*$, $Λ_b \\to Λ_c D_0^*$, and $Ξ_b \\to Ξ_c D_0^*$ within the factorization approach. These predictions provide crucial tests to validate the two-pole interpretation of the $D_0^*(2300)$.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2607.24550",
  "author_total": 3,
  "authors": [
    {
      "name": "Qi-Wei Yuan"
    },
    {
      "name": "Jia-Ting Zhang"
    },
    {
      "name": "Ming-Zhu Liu"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/3atnnhqmdnwny.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2607.24550",
  "fulltext_url": null,
  "id": "3atnnhqmdnwny",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2607.24550",
  "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/2607.24550",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-31",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/3atnnhqmdnwny.ris",
  "sources": [
    {
      "first_seen": "2026-11-03T12:20:58Z",
      "native_id": "2607.24550",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2607.24550"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:hep-ph",
      "subfield": "high-energy"
    }
  ],
  "title": "Decay constants of the two-pole $D_0^*(2300)$",
  "title_text": "Decay constants of the two-pole D_0^*(2300)",
  "type": "preprint",
  "updated_at": "2026-11-05T15:20:17Z",
  "url": "https://research.draconitic.com/paper/3atnnhqmdnwny",
  "venue": "arXiv",
  "versions": []
}