{
  "abstract": "A bstract : We introduce a B -decay tagged energy correlator (BTEC) to resolve the angular structure of energy flow in inclusive B decays in the endpoint region, focusing on the direct-photon contribution to $$ \\overline{B}\\to {X}_s\\gamma $$ B ¯ → X s γ . At leading power and at the natural collinear angular scale τ ~ s ~ Q Λ QCD , we derive a factorization relation involving the standard hard coefficient and B -meson shape function together with a new measured quark jet function; no new leading-power nonperturbative function is introduced. We calculate the measured jet function at one-loop accuracy and verify that its angular integral reproduces the standard inclusive quark jet function. For the central Bosch-Lange-Neubert-Paz parameter set, an illustrative benchmark gives 3 – 16% migration outside the fixed angular cuts τ c = 2 – 4 GeV ² . With an independently constrained shape function, the angular cumulatives provide a closure test of leading-power endpoint factorization and are sensitive to direct- O ₇ power corrections and resolved-photon effects. The BTEC thereby adds information on the angular structure of the inclusive recoil jet beyond the ordinary photon spectrum and may improve signal-background discrimination when their energy-flow profiles differ.",
  "abstract_shown": true,
  "affiliations": [
    "Tianjin University"
  ],
  "article_type": null,
  "arxiv": null,
  "author_total": 1,
  "authors": [
    {
      "affs": [
        0
      ],
      "name": "Shuai Zhao",
      "orcid": "0000-0002-2182-9710"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/9ge1tfwsfmv7y.bib",
  "cited_by": 0,
  "doi": "10.1007/jhep11(2026)028",
  "fulltext_url": null,
  "id": "9ge1tfwsfmv7y",
  "issns": [
    "1029-8479"
  ],
  "landing_url": "https://link.springer.com/article/10.1007/JHEP11(2026)028",
  "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": null,
  "pdf_url": "https://link.springer.com/content/pdf/10.1007/JHEP11(2026)028.pdf",
  "pmcid": null,
  "pmid": null,
  "published": "2026-11-04",
  "publisher": "Springer Science and Business Media LLC",
  "ris": "https://research.draconitic.com/paper/9ge1tfwsfmv7y.ris",
  "sources": [
    {
      "first_seen": "2026-11-06T12:20:49Z",
      "native_id": "10.1007/jhep11(2026)028",
      "source": "crossref",
      "url": "https://link.springer.com/article/10.1007/JHEP11(2026)028"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "issn:1029-8479",
      "subfield": "high-energy"
    }
  ],
  "title": "Photon-tagged energy flow in inclusive endpoint B decays",
  "title_text": "Photon-tagged energy flow in inclusive endpoint B decays",
  "type": "peer-reviewed",
  "updated_at": "2026-11-08T00:21:04Z",
  "url": "https://research.draconitic.com/paper/9ge1tfwsfmv7y",
  "venue": "Journal of High Energy Physics",
  "versions": [
    {
      "doi": "10.48550/arxiv.2607.27367",
      "pid": "e4j00kq3mchye",
      "relation": "preprint",
      "title": "Photon-Tagged Energy Flow in Inclusive Endpoint $B$ Decays",
      "venue": "arXiv"
    }
  ]
}