{"paper":{"title":"Measurement of the B^0 --> pi^-ell^+nu and B^+ --> eta^(')ell^+nu Branching Fractions, the B^0 --> pi^-ell^+nu and B^+ --> eta ell^+nu Form-Factor Shapes, and Determination of |V_{ub}|","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"hep-ex","authors_text":"P. del Amo Sanchez etal, The BABAR Collaboration","submitted_at":"2010-10-05T19:21:36Z","abstract_excerpt":"We report the results of a study of the exclusive charmless semileptonic decays, $B^{+} \\rightarrow \\eta^{(\\prime)} \\ell^{+} \\nu$ and $B^{0} \\rightarrow \\pi^{-} \\ell^{+} \\nu$, undertaken with approximately 464 million $\\ensuremath{B\\kern 0.18em\\bar{\\kern -0.18em B}}$ pairs collected at the $\\Upsilon(4S)$ resonance with the ${{\\slshape B\\kern-0.1em{\\smaller A}\\kern-0.1em B\\kern-0.1em{\\smaller A\\kern-0.2em R}}}$ detector. The analysis uses events in which the signal B decays are reconstructed with a loose neutrino reconstruction technique. We obtain partial branching fractions for $B^{+} \\righta"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1010.0987","kind":"arxiv","version":3},"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"}