{"paper":{"title":"Comments on $\\left|\\frac{V_{ub}}{V_{cb}}\\right|$ and $|V_{ub}|$ from Non-leptonic $B$ Decays within the Perturbative QCD Approach","arxiv_id":"1007.2291","primary_cat":"hep-ph","submitted_at":"2010-07-14T10:31:13+00:00","version_compiled":"v2"},"notice":"Every quoted sentence is the authors' text from the arXiv listing abstract. Labels and probabilities are the outputs of classifier-1.13-20260917 on the question bank abstract-p1-20260923, exactly as returned. No sentence in this record was written by a language model.","schema":"pith.compiled-record/v0","status":"compiled","abstract":{"source":"arXiv listing abstract v2","sentences":[{"i":0,"p":0.85,"id":"s0","own":true,"role":"contribution","text":"We revisited the extracting $\\left|V_{ub}/V_{cb}\\right|$ and $|V_{ub}|$ through calculating the ratios ${\\cal B}(B^0\\to D_s^{(*)+}(\\pi^-,\\rho^-)/ {\\cal B}(B^0\\to D_s^{(*)+} D^{(*)-})$ in the perturbative QCD approach, which is regarded as an effective theory in dealing with non-leptonic charmed $B$ decays.","hedge":{"p":0.98,"label":"asserted"},"own_p":0.89,"main_claim_p":0.09,"quantitative":false,"quantitative_p":0.06,"role_probabilities":{"gap":0.0,"method":0.15,"result":0.0,"background":0.0,"limitation":0.0,"future_work":0.0,"contribution":0.85,"interpretation":0.0}},{"i":1,"p":0.96,"id":"s1","own":true,"role":"method","text":"Utilizing this approach, we could calculate the form factors effectively as well as non-factorizable and annihilation contributions.","hedge":{"p":0.99,"label":"hedged_possibility"},"own_p":0.6,"main_claim_p":0.03,"quantitative":false,"quantitative_p":0.03,"role_probabilities":{"gap":0.0,"method":0.96,"result":0.0,"background":0.0,"limitation":0.0,"future_work":0.0,"contribution":0.04,"interpretation":0.0}},{"i":2,"p":0.99,"id":"s2","own":true,"role":"result","text":"Within the updated distribution amplitudes and the latest experimental data, we get $\\left|{V_{ub}}/{V_{cb}}\\right|=0.083\\pm0.007$, which favors a bit smaller $|V_{ub}|$ compared with the averaged PDG value, but agrees well the exclusively measured values.","hedge":{"p":0.96,"label":"asserted"},"own_p":0.96,"main_claim_p":0.82,"quantitative":true,"quantitative_p":0.99,"role_probabilities":{"gap":0.0,"method":0.0,"result":0.99,"background":0.0,"limitation":0.0,"future_work":0.0,"contribution":0.0,"interpretation":0.01}},{"i":3,"p":0.97,"id":"s3","own":true,"role":"result","text":"Furthermore, we predict the branching ratio of $\\bar B^0 \\to D_s^-\\rho^+$ $\\sim$ $(2.7\\pm 1.2)\\times 10^{-5}$, which could be measured in $B$ factories near future.","hedge":{"p":0.86,"label":"hedged_possibility"},"own_p":0.93,"main_claim_p":0.08,"quantitative":true,"quantitative_p":0.99,"role_probabilities":{"gap":0.0,"method":0.0,"result":0.97,"background":0.0,"limitation":0.0,"future_work":0.03,"contribution":0.0,"interpretation":0.0}},{"i":4,"p":1.0,"id":"s4","own":true,"role":"limitation","text":"In our calculation, the major uncertainty is due to our poor knowledge of heavy meson wave functions.","hedge":{"p":1.0,"label":"asserted"},"own_p":0.88,"main_claim_p":0.04,"quantitative":false,"quantitative_p":0.05,"role_probabilities":{"gap":0.0,"method":0.0,"result":0.0,"background":0.0,"limitation":1.0,"future_work":0.0,"contribution":0.0,"interpretation":0.0}},{"i":5,"p":0.98,"id":"s5","own":true,"role":"limitation","text":"We also comment that it is not trivial to generalize this approach to $B_s$ system, primarily because both $\\bar B_s^0 $ and $B_s^0$ can decay into the same final states $D_s^+K^-$ and $D_s^+D_s^-$.","hedge":{"p":0.88,"label":"asserted"},"own_p":0.57,"main_claim_p":0.04,"quantitative":false,"quantitative_p":0.08,"role_probabilities":{"gap":0.0,"method":0.0,"result":0.0,"background":0.0,"limitation":0.98,"future_work":0.02,"contribution":0.0,"interpretation":0.0}}]},"compiled":{"main_claim":{"p":1.0,"text":"Within the updated distribution amplitudes and the latest experimental data, we get $\\left|{V_{ub}}/{V_{cb}}\\right|=0.083\\pm0.007$, which favors a bit smaller $|V_{ub}|$ compared with the averaged PDG value, but agrees well the exclusively measured values.","location":"abstract s2","hedge_strength":{"p":0.96,"label":"asserted"}},"provenance":{"route":{"via":"OpenRouter","model":"classifier-1.13","endpoint":"https://openrouter.ai/api/v1/systemone","provider":"TypeSafe"},"packing":"one request per paper","requests":1,"input_tokens":5444,"cost_usd_reported":0.000229},"compiled_at":"2026-09-23","bank_version":"abstract-p1-20260923","model_version":"classifier-1.13-20260917","abstract_states":{"claims_first":0.03,"states_limitation":0.98,"human_participants":0.01,"controlled_comparison":0.1,"randomized_assignment":0.01,"states_quantitative_result":0.99,"compares_with_prior_results":0.96,"mentions_code_or_data_availability":0.02},"evidential_basis":{"p":0.91,"value":"simulation or computation","probabilities":{"argument":0.0,"literature":0.0,"proof_or_derivation":0.03,"analysis_of_existing_data":0.06,"observation_or_experiment":0.0,"simulation_or_computation":0.91}},"contribution_type":{"p":0.95,"value":"theoretical result","probabilities":{"review":0.0,"method_or_tool":0.0,"empirical_study":0.0,"simulation_study":0.03,"theoretical_result":0.95,"dataset_or_benchmark":0.0,"position_or_commentary":0.02}},"contribution_statement":{"p":0.71,"text":"We revisited the extracting $\\left|V_{ub}/V_{cb}\\right|$ and $|V_{ub}|$ through calculating the ratios ${\\cal B}(B^0\\to D_s^{(*)+}(\\pi^-,\\rho^-)/ {\\cal B}(B^0\\to D_s^{(*)+} D^{(*)-})$ in the perturbative QCD approach, which is regarded as an effective theory in dealing with non-leptonic charmed $B$ decays.","location":"abstract s0"}},"coverage":{"tier":"abstract","levels_run":["P abstract"],"not_examined":["full text","figures and tables","references and citing sentences","relations to other papers"],"sources_read":["arXiv listing abstract v2"],"levels_not_run":["S sections","T body sentences","C citations","R cross-paper relations"],"sentences_examined":6,"sentences_in_abstract":6},"measured_accuracy":{"url":"https://pith.science/accuracy","measured_on":"2026-10-02","method":"two independent model families labelled a fresh random sample blind; the figure is how often the published label matches their consensus","sentence_role_agreement":0.92,"main_claim_agreement":0.908,"typed_citation_agreement":0.933,"typed_citation_agreement_95_interval":[0.917,0.945],"review_comments_accurate":0.758,"review_comments_accurate_95_interval":[0.684,0.82],"review_caught_admitted_error_found_or_related":0.448}}