{"paper":{"title":"Evidence for $B^+\\to\\omega l^+ \\nu$","license":"","headline":"","cross_cats":[],"primary_cat":"hep-ex","authors_text":"The Belle Collaboration","submitted_at":"2004-02-13T02:50:58Z","abstract_excerpt":"We have searched for the decay $B^+\\to\\omega l^+\\nu$ ($l=e$ or $\\mu$) in 78 fb$^{-1}$ of $\\Upsilon(4S)$ data (85 million $B\\bar B$ events) accumulated with the Belle detector. The final state is fully reconstructed using the $\\omega$ decay into $\\pi^+\\pi^-\\pi^0$, combined with detector hermeticity to estimate the neutrino momentum. A signal of $414\\pm 125$ events is found in the data, corresponding to a branching fraction of $(1.3\\pm 0.4\\pm 0.2\\pm 0.3)\\times 10^{-4}$, where the first two errors are statistical and systematic, respectively. The third error reflects the estimated form-factor unc"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"hep-ex/0402023","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"}