{"work":{"id":"508e6607-c567-444b-9244-3cb05fa4ced2","openalex_id":null,"doi":null,"arxiv_id":"1507.03233","raw_key":null,"title":"Measurement of the branching ratio of $\\bar{B} \\to D^{(\\ast)} \\tau^- \\bar{\\nu}_\\tau$ relative to $\\bar{B} \\to D^{(\\ast)} \\ell^- \\bar{\\nu}_\\ell$ decays with hadronic tagging at Belle","authors":null,"authors_text":"M","year":2015,"venue":"hep-ex","abstract":"We report a measurement of the branching fraction ratios R(D(*)) of Bbar -> D(*) tau- nubar_tau relative to Bbar -> D()* l- nubar_l (where l = e or mu) using the full Belle data sample of 772 x 10^6 BBbar pairs collected at the Y(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. The measured values are R(D)= 0.375 +- 0.064(stat.) +- 0.026(syst.) and R(D*) = 0.293 +- 0.038(stat.) +- 0.015(syst.). The analysis uses hadronic reconstruction of the tag-side B meson and purely leptonic tau decays. The results are consistent with earlier measurements and do not show a significant deviation from the standard model prediction.","external_url":"https://arxiv.org/abs/1507.03233","cited_by_count":null,"metadata_source":"pith","metadata_fetched_at":"2026-05-25T19:01:09.263130+00:00","pith_arxiv_id":"1507.03233","created_at":"2026-05-12T02:06:15.506607+00:00","updated_at":"2026-05-25T19:01:09.263130+00:00","title_quality_ok":true,"display_title":"Huschle and others (Belle Collaboration),Measurement of the branching ratio of ¯B→D (∗)τ −¯ντ relative to ¯B→D (∗)ℓ−¯νℓ decays with hadronic tagging at Belle,Phys","render_title":"Huschle and others (Belle Collaboration),Measurement of the branching ratio of ¯B→D (∗)τ −¯ντ relative to ¯B→D (∗)ℓ−¯νℓ decays with hadronic tagging at Belle,Phys"},"hub":{"state":{"work_id":"508e6607-c567-444b-9244-3cb05fa4ced2","tier":"hub","tier_reason":"10+ Pith inbound or 1,000+ external citations","pith_inbound_count":13,"external_cited_by_count":null,"distinct_field_count":2,"first_pith_cited_at":"2019-06-21T14:53:11+00:00","last_pith_cited_at":"2026-05-20T15:24:43+00:00","author_build_status":"not_needed","summary_status":"needed","contexts_status":"needed","graph_status":"needed","ask_index_status":"not_needed","reader_status":"not_needed","recognition_status":"not_needed","updated_at":"2026-05-31T10:22:25.219531+00:00","tier_text":"hub"},"tier":"hub","role_counts":[{"context_role":"background","n":1},{"context_role":"dataset","n":1}],"polarity_counts":[{"context_polarity":"background","n":1},{"context_polarity":"use_dataset","n":1}],"runs":{},"summary":{},"graph":{},"authors":[]}}