{
  "abstract": "We calculate the decay constants of the lowest-lying $$B_c$$ B c mesons in the spin-parity channels $$J^P {=}\\,\\, 0^-,\\,0^+,\\,1^-,\\,1^+$$ J P = 0 - , 0 + , 1 - , 1 + , commonly referred to as the $$B_c,\\, B_{c0}^*,\\, B_c^*,\\, B_{c1}$$ B c , B c 0 ∗ , B c ∗ , B c 1 mesons, respectively. Within the framework of QCD sum rules, we consider the decay constants associated with both the (axial-)vector and (axial-)tensor interpolating currents. The decay constants with (axial-)vector currents have already been studied in the literature. We refine previous QCD sum rule results by including higher-order power corrections and performing a comprehensive uncertainty analysis. Furthermore, we provide the first determination of the (axial-)tensor decay constants of the $$B_c^*$$ B c ∗ and $$B_{c1}$$ B c 1 mesons. These new results will not only improve theoretical predictions for purely leptonic $$B_c$$ B c decays, but also strengthen unitarity constraints on $$b \\rightarrow c$$ b → c form factors, thereby improving the precision of predictions for $$\\bar{B} \\rightarrow D^{(*)} \\ell \\bar{\\nu }$$ B ¯ → D ( ∗ ) ℓ ν ¯ decays and the determination of $$|V_{cb}|$$ | V cb | .",
  "abstract_shown": true,
  "affiliations": [
    "Universität Bonn"
  ],
  "article_type": null,
  "arxiv": null,
  "author_total": 3,
  "authors": [
    {
      "affs": [
        0
      ],
      "name": "Eduard Costa i Reina",
      "orcid": "0009-0006-4001-4943"
    },
    {
      "affs": [
        0
      ],
      "name": "Nico Gubernari",
      "orcid": "0000-0002-2278-2707"
    },
    {
      "affs": [
        0
      ],
      "name": "Zachary Wüthrich",
      "orcid": "0009-0006-6058-8936"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/1725y8knj0f2s.bib",
  "cited_by": 0,
  "doi": "10.1140/epjc/s10052-026-16381-w",
  "fulltext_url": "https://doi.org/10.1140/epjc/s10052-026-16381-w",
  "id": "1725y8knj0f2s",
  "issns": [
    "1434-6044",
    "1434-6052"
  ],
  "landing_url": "https://link.springer.com/article/10.1140/epjc/s10052-026-16381-w",
  "language": "en",
  "licence": "CC-BY-4.0",
  "licence_label": "CC BY 4.0",
  "licence_source": "article",
  "licence_url": "https://creativecommons.org/licenses/by/4.0",
  "metadata_licence": null,
  "native_subjects": [
    [
      "lcc",
      "QB460-466"
    ],
    [
      "lcc",
      "QC770-798"
    ],
    [
      "openalex",
      "3106|Quantum Chromodynamics and Particle Interactions"
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  "openalex": "W7165844958",
  "pdf_url": "https://link.springer.com/content/pdf/10.1140/epjc/s10052-026-16381-w.pdf",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-22",
  "publisher": "Springer Science and Business Media LLC",
  "ris": "https://research.draconitic.com/paper/1725y8knj0f2s.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:18:04Z",
      "native_id": "10.1140/epjc/s10052-026-16381-w",
      "source": "crossref",
      "url": "https://link.springer.com/article/10.1140/epjc/s10052-026-16381-w"
    },
    {
      "first_seen": "2026-10-30T13:46:21Z",
      "native_id": "56c69455102943139b010c583a2df478",
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      "url": "https://doi.org/10.1140/epjc/s10052-026-16381-w"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "openalex:3106|Quantum Chromodynamics and Particle Interactions",
      "subfield": "high-energy"
    }
  ],
  "title": "Decay constants of the $$B_c$$ mesons with vector and tensor currents",
  "title_text": "Decay constants of the B_c mesons with vector and tensor currents",
  "type": "peer-reviewed",
  "updated_at": "2026-10-30T13:46:21Z",
  "url": "https://research.draconitic.com/paper/1725y8knj0f2s",
  "venue": "The European Physical Journal C",
  "versions": []
}