{"paper":{"title":"Measurements of Charged Current Lepton Universality and $|V_{us}|$ using Tau Lepton Decays to $e^- \\bar{\\nu}_e \\nu_\\tau$, $\\mu^- \\bar{\\nu}_\\mu \\nu_\\tau$, $\\pi^- \\nu_\\tau$, and $\\K^- \\nu_\\tau$","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"hep-ex","authors_text":"B. Aubert, et al, The BABAR Collaboration","submitted_at":"2009-12-01T19:53:55Z","abstract_excerpt":"Using 467 $fb^{-1}$ of $e^+e^-$ annihilation data collected with the BaBar detector, we measure $\\frac{{\\cal{B}}(\\tau^- \\to \\mu^- \\bar{\\nu}_\\mu \\nu_\\tau)}{{\\cal{B}}(\\tau^- \\to e^- \\bar{\\nu}_e \\nu_\\tau)} = (0.9796 \\pm 0.0016 \\pm 0.0036)$, $\\frac{{\\cal{B}}(\\tau^- \\to \\pi^- \\nu_\\tau)}{{\\cal{B}}(\\tau^- \\to e^- \\bar{\\nu}_e \\nu_\\tau)} = (0.5945 \\pm 0.0014 \\pm 0.0061)$, and $\\frac{{\\cal{B}}(\\tau^- \\to \\K^- \\nu_\\tau)}{{\\cal{B}}(\\tau^- \\to e^- \\bar{\\nu}_e \\nu_\\tau)} = (0.03882 \\pm 0.00032 \\pm 0.00057)$, where the uncertainties are statistical and systematic, respectively. From these precision $\\tau$ me"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0912.0242","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"}