{
  "abstract": "We present a global HQE analysis of inclusive semileptonic $\\bar{B} \\to X_c l \\bar ν_\\ell$ moments, partial branching fractions, and $B^+$, $B^0$ lifetime observables. Our fit setup follows a new approach where perturbative scales are treated as correlated nuisance parameters, while missing higher-order power corrections are assessed through order-by-order fits up to $O(1/m_b^5)$. In the default scenario, we find $|V_{cb}| = (42.32 \\pm 0.28|_{\\rm fit} \\pm 0.10|_{\\rm h.o.})\\times 10^{-3} = (42.32 \\pm 0.30) \\times 10^{-3}$ and $\\mathcal{B}(\\bar B \\to X_c \\ell \\bar ν_\\ell) = (10.91 \\pm 0.11|_{\\rm fit} \\pm 0.21|_{\\rm h.o.})\\%$. For the lifetimes we obtain $τ_{B^+} = 1.89^{+0.04}_{-0.22}$ ps and $τ_{B^0} = 1.74^{+0.03}_{-0.23}$ ps, where the strongly asymmetric uncertainty is dominated by the perturbative scale variation of the non-leptonic width. Our predictions are in agreement with previous predictions and the corresponding widths lie $1.1$-$1.2,σ$ below the measurements. For the lifetime ratio, we find $τ_{B^+}/τ_{B^0} = 1.082^{+0.031}_{-0.013}$ which agrees with experiment. For the full dataset of $q^2, E_\\ell$ and $M_X$ moments, we obtain a poor fit quality, which we investigate using a leave-one-out study. In light of the persisting $|V_{cb}|$ puzzle, new correlated moment measurements as well as updated branching ratio measurements are highly encouraged.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.28752",
  "author_total": 4,
  "authors": [
    {
      "name": "Matteo Fael"
    },
    {
      "name": "Ilija S. Milutin"
    },
    {
      "name": "Markus Prim"
    },
    {
      "name": "K. Keri Vos"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/48q02d4ensv8a.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.28752",
  "fulltext_url": null,
  "id": "48q02d4ensv8a",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.28752",
  "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": null,
  "pdf_url": "https://arxiv.org/pdf/2609.28752",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-23",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/48q02d4ensv8a.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:24:11Z",
      "native_id": "2609.28752",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.28752"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:hep-ex",
      "subfield": "high-energy"
    }
  ],
  "title": "Inclusive $B$ decays, lifetimes, and $|V_{cb}|$: a unified heavy-quark expansion analysis",
  "title_text": "Inclusive B decays, lifetimes, and |V_cb|: a unified heavy-quark expansion analysis",
  "type": "preprint",
  "updated_at": "2026-10-30T12:24:11Z",
  "url": "https://research.draconitic.com/paper/48q02d4ensv8a",
  "venue": "arXiv",
  "versions": []
}