{"paper":{"title":"Charged and Neutral $\\bar B_{u,d,s} \\to \\gamma$ Form Factors from Light Cone Sum Rules at NLO","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["hep-ex"],"primary_cat":"hep-ph","authors_text":"Ben Pullin, Roman Zwicky, Tadeusz Janowski","submitted_at":"2021-06-25T13:13:18Z","abstract_excerpt":"We present the first analytic ${\\cal O}(\\alpha_s)$-computation at twist-$1$,$2$ of the $\\bar B_{u,d,s} \\to \\gamma$ form factors within the framework of sum rules on the light-cone. These form factors describe the charged decay $\\bar B_u \\to \\gamma \\ell^- \\bar{\\nu}$, contribute to the flavour changing neutral currents $\\bar B_{d,s} \\to \\gamma \\ell^+ \\ell^-$ and serve as inputs to more complicated processes. We provide a fit in terms of a $z$-expansion with correlation matrix and extrapolate the form factors to the kinematic endpoint by using the $g_{BB^*\\gamma}$ couplings as a constraint. Analy"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2106.13616","kind":"arxiv","version":2},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2106.13616/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}