{
  "abstract": "We investigate electromagnetic corrections to the $B$-meson decay constant and light-cone distribution amplitudes (LCDAs) within the framework of heavy-quark effective theory. The inclusion of QED effects extends the support of the LCDAs to negative values of the light-cone momentum. We clarify the relation between this region and QED-generalized decay constants sensitive to electromagnetic final-state radiation. We derive model-independent expressions for the asymptotic behavior in the large negative-momentum region of the QED-generalized LCDAs $Φ_\\pm(ω,μ)$ in terms of integrals over the two- and three-particle LCDAs defined in pure QCD. We show that our result for $Φ_+$ is consistent with the renormalization-group equation satisfied by this object and study its evolution using the known one-loop anomalous dimension. Finally, we propose a phenomenological model consistent with these constraints",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.01718",
  "author_total": 2,
  "authors": [
    {
      "name": "Max Ferré"
    },
    {
      "name": "Matthias Neubert"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/56g4d2epdtepy.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.01718",
  "fulltext_url": null,
  "id": "56g4d2epdtepy",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.01718",
  "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",
      "3106|Quantum Chromodynamics and Particle Interactions"
    ]
  ],
  "openalex": "W7207757632",
  "pdf_url": "https://arxiv.org/pdf/2609.01718",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-01",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/56g4d2epdtepy.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:18:16Z",
      "native_id": "2609.01718",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.01718"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:hep-ph",
      "subfield": "high-energy"
    }
  ],
  "title": "Electromagnetic tails of $B$-meson light-cone distribution amplitudes",
  "title_text": "Electromagnetic tails of B-meson light-cone distribution amplitudes",
  "type": "preprint",
  "updated_at": "2026-10-30T12:18:16Z",
  "url": "https://research.draconitic.com/paper/56g4d2epdtepy",
  "venue": "arXiv",
  "versions": []
}