{"paper":{"title":"The Subleading Isgur-Wise Form Factor $\\xi_3(v\\cdot v')$ and its Implications for the Decays $\\bar B\\to D^{(*)}\\ell\\,\\bar\\nu$","license":"","headline":"","cross_cats":[],"primary_cat":"hep-ph","authors_text":"M. Neubert, Y. Nir, Z. Ligeti","submitted_at":"1993-05-24T08:17:51Z","abstract_excerpt":"We calculate, in the framework of QCD sum rules and to next-to-leading order in perturbation theory, the universal function $\\xi_3(v\\cdot v')$ which appears at order $1/m_Q$ in the heavy quark expansion of meson weak decay form factors. We find that radiative corrections of order $\\alpha_s$ are very important. Over the kinematic range accessible in semileptonic decays, $\\xi_3(v\\cdot v')$ is proportional to the leading-order Isgur-Wise function $\\xi(v\\cdot v')$ to very good accuracy. Taking into account all sources of uncertainty, we estimate $\\xi_3/\\xi=(0.6\\pm 0.2)$. This reduces the theoretic"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"hep-ph/9305304","kind":"arxiv","version":1},"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"}