{"paper":{"title":"Refining new-physics searches in B -> D tau nu decay with lattice QCD","license":"http://creativecommons.org/licenses/publicdomain/","headline":"","cross_cats":["hep-lat"],"primary_cat":"hep-ph","authors_text":"A. Bazavov, A. S. Kronfeld, A. X. El-Khadra, C. Bernard, C. DeTar, C. M. Bouchard, Daping Du, D. Toussaint, E. D. Freeland, E. Gamiz, E. T. Neil, J. Foley, J. Laiho, J. N. Simone, Jon A. Bailey, Jongjeong Kim, L. Levkova, M. B. Oktay, P. B. Mackenzie, Ran Zhou, R. Sugar, R. S. Van de Water, Si-Wei Qiu, Steven Gottlieb, U. M. Heller, Y. Meurice","submitted_at":"2012-06-21T19:25:19Z","abstract_excerpt":"The semileptonic decay channel B -> D tau nu is sensitive to the presence of a scalar current, such as that mediated by a charged-Higgs boson. Recently the BaBar experiment reported the first observation of the exclusive semileptonic decay B -> D tau nu, finding an approximately 2-sigma disagreement with the Standard-Model prediction for the ratio R(D)=BR(B->D tau nu)/BR(B->D l nu), where l=e,mu. We compute this ratio of branching fractions using hadronic form factors computed in unquenched lattice QCD and obtain R(D) = 0.316(12)(7), where the errors are statistical and total systematic, respe"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1206.4992","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":""},"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"}