{"paper":{"title":"The decays $\\bar{B} \\to D^{**}\\pi$ and the Isgur-Wise functions $\\tau_{1/2}(w)$, $\\tau_{3/2}(w)$","license":"","headline":"","cross_cats":[],"primary_cat":"hep-ph","authors_text":"A. Le Yaouanc, F. Jugeau, J.-C. Raynal, L. Oliver","submitted_at":"2005-04-22T13:21:36Z","abstract_excerpt":"We perform a phenomenological analysis of the decays $B \\to D^{**}\\pi$, where $D^{**}$ is a $P$-wave excited meson with total angular momentum $j = {1 \\over 2}$ or ${3 \\over 2}$ for the light cloud, recently measured by the Belle Collaboration in the modes $\\bar{B}^0\\to D^{**+}\\pi^-$ (Class I) and $B^- \\to D^{**0}\\pi^-$ (Class III). Making the reasonable assumption of naive factorization, that we test in $B \\to D(D^*)\\pi$ decays, Class I decays allow to extract the Isgur-Wise form factors $\\tau_{1/2}(w)$, $\\tau_{3/2}(w)$ at $w \\cong w_{max}$ ($q^2 \\cong 0$). We obtain $\\tau_{1/2}(w_{max}) < 0."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"hep-ph/0504206","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/hep-ph/0504206/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"}