{
  "abstract": "A bstract : This paper has three main aims. First, I review in a pedagogical way the unitarity bounds for form factors in B -meson decays, together with the parametrisations most commonly used in phenomenological analyses. These include BGL, BCL, CLN, and the Dispersive Matrix (DM) method. I also clarify the relation between BGL and DM, showing that they are two equivalent implementations of the same unitarity information. Second, I demonstrate that the standard BGL and DM constructions are strictly rigorous only when no subthreshold cuts are present. For B -meson decays, this requirement is fulfilled exclusively by the B → π FFs. To treat the generic case, I fully develop the GG parametrisation introduced in a previous paper and show how the same logic extends to a DM-like construction. Third, I perform three novel combined analyses of form factors and obtain predictions over the full semileptonic region. The first analysis concerns the form factors for B → π and B s → K (∗) , the second those for B → K (∗) and B s → ϕ , and the third those for B → D (∗) and $$ {B}_s\\to {D}_s^{\\left(\\ast \\right)} $$ B s → D s ∗ . All numerical results, posterior samples, analysis files, and plots are provided in the supplementary material [1].",
  "abstract_shown": true,
  "affiliations": [
    "University of Cambridge",
    "Universität Bonn"
  ],
  "article_type": null,
  "arxiv": null,
  "author_total": 1,
  "authors": [
    {
      "affs": [
        0,
        1
      ],
      "name": "Nico Gubernari",
      "orcid": "0000-0002-2278-2707"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/49q7erhpxj3zv.bib",
  "cited_by": 2,
  "doi": "10.1007/jhep10(2026)067",
  "fulltext_url": null,
  "id": "49q7erhpxj3zv",
  "issns": [
    "1029-8479"
  ],
  "landing_url": "https://link.springer.com/article/10.1007/JHEP10(2026)067",
  "language": null,
  "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": [
    [
      "openalex",
      "3106|Particle physics theoretical and experimental studies"
    ]
  ],
  "openalex": "W7162486554",
  "pdf_url": "https://link.springer.com/content/pdf/10.1007/JHEP10(2026)067.pdf",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-07",
  "publisher": "Springer Science and Business Media LLC",
  "ris": "https://research.draconitic.com/paper/49q7erhpxj3zv.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:18:01Z",
      "native_id": "10.1007/jhep10(2026)067",
      "source": "crossref",
      "url": "https://link.springer.com/article/10.1007/JHEP10(2026)067"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "openalex:3106|Particle physics theoretical and experimental studies",
      "subfield": "high-energy"
    }
  ],
  "title": "Unitarity bounds and form-factor predictions for B-meson decays",
  "title_text": "Unitarity bounds and form-factor predictions for B-meson decays",
  "type": "peer-reviewed",
  "updated_at": "2026-10-30T12:18:01Z",
  "url": "https://research.draconitic.com/paper/49q7erhpxj3zv",
  "venue": "Journal of High Energy Physics",
  "versions": []
}