{
  "abstract": "We perform a theoretical study of the $B^+ \\to D^+ D^- K^+$, $B^0 \\to D^+ D^- K^0$ and $Λ_b \\to D^+ D^- Λ$ reactions by looking at the production mechanisms, with special emphasis in the final state interaction of the charmed mesons, which gives rise to the $X(3930)$, coupling strongly to $D_s\\bar{D}_s$, and another state that we call $X(3700)$, coupling strongly to $D \\bar D$ that qualifies as a $D \\bar D$ bound state. The combined study of all these reactions shows that the final state interaction responsible for the production of these resonances is more important in the $B^+ \\to D^+ D^- K^+$ reaction than in the $Λ_b \\to D^+ D^- Λ$ one. We have taken this into account and shown that normalizing the $D^+ D^-$ mass distributions to the same value at the peak of the $ψ(3770)$ production, the two mass distributions are quite different in a range of 10 MeV above the $D^+ D^-$ threshold, with a value about an order of magnitude bigger for the $B^+ \\to D^+ D^- K^+$ reaction than for the $Λ_b \\to D^+ D^- Λ$ one. The $D^+D^-$ mass distribution by itself also shows an enhancement of about one order of magnitude in the presence of the $X(3700)$ with respect to a calculation where this resonance is absent. We make a call to measure these magnitudes in the coming LHCb upgrades, which would bring great support to the existence of the bound $D^+ D^-$ state.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2606.14644",
  "author_total": 5,
  "authors": [
    {
      "name": "Xiu-Lei Ren"
    },
    {
      "name": "Hai-Peng Li"
    },
    {
      "name": "Wei-Hong Liang"
    },
    {
      "name": "Chu-Wen Xiao"
    },
    {
      "name": "Eulogio Oset"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/5j8v3ca9hny24.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2606.14644",
  "fulltext_url": null,
  "id": "5j8v3ca9hny24",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2606.14644",
  "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/2606.14644",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-05",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/5j8v3ca9hny24.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:19:48Z",
      "native_id": "2606.14644",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2606.14644"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:hep-ph",
      "subfield": "high-energy"
    }
  ],
  "title": "In search for signals of the $D\\bar{D}$ bound state $X(3700)$ from study of the $B^+ \\to D^+ D^- K^+$, $B^0 \\to D^+ D^- K^0$ and $Λ_b \\to D^+ D^- Λ$ reactions",
  "title_text": "In search for signals of the DD̅ bound state X(3700) from study of the B^+ → D^+ D^- K^+, B^0 → D^+ D^- K^0 and Λ_b → D^+ D^- Λ reactions",
  "type": "preprint",
  "updated_at": "2026-10-30T12:19:48Z",
  "url": "https://research.draconitic.com/paper/5j8v3ca9hny24",
  "venue": "arXiv",
  "versions": [
    {
      "doi": "10.1103/6w2t-tpmv",
      "pid": null,
      "relation": "published-as",
      "title": null,
      "venue": null
    }
  ]
}