{"paper":{"title":"$\\mathcal{B}(B\\rightarrow\\tau\\nu)$ measurement with the hadronic FEI at Belle~II","license":"http://creativecommons.org/publicdomain/zero/1.0/","headline":"","cross_cats":[],"primary_cat":"hep-ex","authors_text":"Giovanni Gaudino","submitted_at":"2025-06-03T15:37:52Z","abstract_excerpt":"We presented at Moriond EW 2025 a measurement of the branching fraction of $B\\to\\tau\\nu$ decays using $(387\\pm 6) \\times 10^6$ $\\Upsilon (4S)$ collected between 2019 and 2022 with the Belle~II detector at the SuperKEKB $e^+e^-$ collider. We reconstruct the accompanying $B^-$ meson using the hadronic tagging method, while $B\\to\\tau\\nu$ candidates are identified in the recoil. We find evidence for $B\\to\\tau\\nu$ decays at 3.0 standard deviations, including systematic uncertainties. The measured branching fraction is $\\mathcal{B}(B\\rightarrow\\tau\\nu) = [1.24 \\pm 0.41~\\text{(stat.)} \\pm 0.19~\\text{"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2506.03000","kind":"arxiv","version":1},"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/2506.03000/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"}