{"paper":{"title":"Measurement of the ratios of branching fractions $\\mathcal{R}(D^{*})$ and $\\mathcal{R}(D^{0})$","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"hep-ex","authors_text":"LHCb Collaboration","submitted_at":"2023-02-06T15:53:08Z","abstract_excerpt":"The ratios of branching fractions $\\mathcal{R}(D^{*})\\equiv\\mathcal{B}(\\bar{B}\\to D^{*}\\tau^{-}\\bar{\\nu}_{\\tau})/\\mathcal{B}(\\bar{B}\\to D^{*}\\mu^{-}\\bar{\\nu}_{\\mu})$ and $\\mathcal{R}(D^{0})\\equiv\\mathcal{B}(B^{-}\\to D^{0}\\tau^{-}\\bar{\\nu}_{\\tau})/\\mathcal{B}(B^{-}\\to D^{0}\\mu^{-}\\bar{\\nu}_{\\mu})$ are measured, assuming isospin symmetry, using a sample of proton-proton collision data corresponding to 3.0 fb${ }^{-1}$ of integrated luminosity recorded by the LHCb experiment during 2011 and 2012. The tau lepton is identified in the decay mode $\\tau^{-}\\to\\mu^{-}\\nu_{\\tau}\\bar{\\nu}_{\\mu}$. The mea"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2302.02886","kind":"arxiv","version":3},"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/2302.02886/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"}