{
  "abstract": "The study of two-body charmed anti-charmed baryonic $\\overline B\\to {\\bf B}_c \\overline {\\bf B}_c$ decays using the topological amplitude approach is revisited. We include the $b\\to u\\bar u q$ contributions, in addition to the $b\\to c\\bar c q$ contributions, to these decays. The topological decomposition of $\\overline B\\to {\\bf B}_c(\\bf {\\bar 3_f}) \\overline {\\bf B}_c(\\bf { 3_f})$, ${\\bf B}_c(\\bf 6_f) \\overline {\\bf B}_c(\\bf { 3_f})$, ${\\bf B}_c(\\bf {\\bar 3_f}) \\overline {\\bf B}_c(\\bf {\\bar 6_f})$ and ${\\bf B}_c(\\bf 6_f) \\overline {\\bf B}_c(\\bf {\\bar 6_f})$ decay amplitudes are updated accordingly. Although the $b\\to u\\bar u q$ contributions are Cabibbo-Kobayashi-Maskawa (CKM) suppressed in $ΔS=-1$ transitions, their effects are significantly amplified in $ΔS=0$ transitions, as the relative size of the CKM factors in $b\\to u\\bar u q$ and $b\\to c\\bar c q$ contributions in $ΔS=0$ transitions is enlarged by $λ^{-2}$, roughly a factor of 20, from the one in $ΔS=-1$ transitions. Present data in $\\overline B\\to {\\bf B}_c(\\bf {\\bar 3_f}) \\overline {\\bf B}_c(\\bf { 3_f})$ decay rates allow or even slightly prefer non-negligible $b\\to u\\bar u q$ contributions. These $b\\to u\\bar u q$ contributions can allow much larger rates for $B^-\\to Ξ_c^0 \\bar Ξ_c^{-}$, $\\overline B{}_s^0\\to Λ_c^+ \\bar Ξ_c^{-}$ and $\\overline B{}^0\\to Ξ_c^+ \\bar Ξ_c^{-}$ decays than those only have $b\\to c\\bar c d$ contributions. Several modes containing only $b\\to u\\bar u q$ contributions in $\\overline B\\to {\\bf B}_c(\\bf 6_f) \\overline {\\bf B}_c(\\bf { 3_f})$, ${\\bf B}_c(\\bf {\\bar 3_f}) \\overline {\\bf B}_c(\\bf {\\bar 6_f})$ decays are also identified. Measuring these decays will be interesting and useful in clarifying the role of $b\\to u\\bar u q$ contributions in two-body charmed anti-charmed baryonic $\\overline B$ decays.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.08053",
  "author_total": 1,
  "authors": [
    {
      "name": "Chun-Khiang Chua"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/25gf1tqkrqwfv.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.08053",
  "fulltext_url": null,
  "id": "25gf1tqkrqwfv",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.08053",
  "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-ex"
    ],
    [
      "arxiv",
      "hep-ph"
    ],
    [
      "openalex",
      "3106|Particle physics theoretical and experimental studies"
    ]
  ],
  "openalex": "W7211987470",
  "pdf_url": "https://arxiv.org/pdf/2609.08053",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-11",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/25gf1tqkrqwfv.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:21:07Z",
      "native_id": "2609.08053",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.08053"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:hep-ex",
      "subfield": "high-energy"
    }
  ],
  "title": "Revisiting two-body charmed anti-charmed baryonic $B$ decays",
  "title_text": "Revisiting two-body charmed anti-charmed baryonic B decays",
  "type": "preprint",
  "updated_at": "2026-10-30T12:21:07Z",
  "url": "https://research.draconitic.com/paper/25gf1tqkrqwfv",
  "venue": "arXiv",
  "versions": []
}