{
  "abstract": "We present a systematic study of the three-particle di-light-cone distribution amplitudes (DLCDAs) of the $B$-meson. They are defined through $B$-meson--to--vacuum matrix elements of trilocal HQET operators, in which the light antiquark and the gluon field-strength tensor are located on two back-to-back light rays. In this sense, the DLCDAs generalise the conventional $B$-meson light-cone distribution amplitudes to configurations where soft fields couple to collinear degrees of freedom in two distinct directions. As such, they parametrise the non-perturbative dynamics associated with non-factorisable soft-gluon contributions in rare and non-leptonic exclusive $B$-meson decays. We derive the complete Lorentz decomposition of the matrix elements of generic trilocal operators, identify eight independent DLCDAs, and organise them in a basis of definite twist. Using local operator identities and equations-of-motion constraints, we obtain tree-level relations for their normalisation integrals and first moments in terms of a minimal set of hadronic parameters. These relations allow us to construct simple momentum-space models for all independent DLCDAs. For the leading-twist distribution, we further incorporate the perturbative radiative tail at order $α_s$ and discuss its impact on the resulting parametrisation.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2606.20267",
  "author_total": 6,
  "authors": [
    {
      "name": "Riccardo Bartocci"
    },
    {
      "name": "Philipp Böer"
    },
    {
      "name": "Thorsten Feldmann"
    },
    {
      "name": "Max Ferré"
    },
    {
      "name": "Nico Gubernari"
    },
    {
      "name": "Daniel Vladimirov"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/bagm5s6atat7j.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2606.20267",
  "fulltext_url": null,
  "id": "bagm5s6atat7j",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2606.20267",
  "language": null,
  "licence": "LicenseRef-arXiv-nonexclusive-1.0",
  "licence_label": "arXiv licence",
  "licence_source": "article",
  "licence_url": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "hep-ph"
    ]
  ],
  "openalex": null,
  "pdf_url": "https://arxiv.org/pdf/2606.20267",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-23",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/bagm5s6atat7j.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:23:56Z",
      "native_id": "2606.20267",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2606.20267"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:hep-ph",
      "subfield": "high-energy"
    }
  ],
  "title": "Three-particle di-light-cone distribution amplitudes of the $B$-meson in heavy-quark effective theory",
  "title_text": "Three-particle di-light-cone distribution amplitudes of the B-meson in heavy-quark effective theory",
  "type": "preprint",
  "updated_at": "2026-10-30T12:23:56Z",
  "url": "https://research.draconitic.com/paper/bagm5s6atat7j",
  "venue": "arXiv",
  "versions": []
}