{"paper":{"title":"New physics contributions in $B\\to\\pi\\tau\\bar\\nu$ and $B\\to\\tau\\bar\\nu$","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["hep-ex"],"primary_cat":"hep-ph","authors_text":"Minoru TANAKA, Ryoutaro Watanabe","submitted_at":"2016-08-18T08:45:01Z","abstract_excerpt":"We study possible new physics contributions in $B\\to\\pi\\tau\\bar\\nu $ and $B\\to\\tau\\bar\\nu$ employing the model-independent effective Lagrangian that describes the quark-level transition $b \\to u \\tau\\nu$ at low energies. The decay rate of $B\\to\\pi\\tau\\bar\\nu$ and its theoretical uncertainty are evaluated using the $B\\to\\pi$ form factors given by recent lattice QCD studies. Comparing theoretical results with the current experimental data, $\\mathcal{B}(B\\to\\pi\\tau\\bar\\nu)<2.5\\times 10^{-4}$ and $\\mathcal{B}(B\\to\\tau\\bar\\nu)=(1.14\\pm 0.22)\\times 10^{-4}$, we obtain constraints on the Wilson coeff"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1608.05207","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/1608.05207/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"}