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Pole dominance, however, does not apply to the axial formfactors which results in specific predictions for the predominant polarization of the $\\rho$ meson and the shape of the lepton spectrum. For the total decay rates we find $\\Gamma (\\bar B^0 \\to \\pi^+ e^- \\bar\\nu) = (5.1\\pm 1.1)\\,|V_{ub}|^2\\, 10^{12}\\,{\\rm s^{-1}}$, $\\Gam"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"hep-ph/9305267","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"hep-ph","submitted_at":"1993-05-14T07:28:19Z","cross_cats_sorted":[],"title_canon_sha256":"a569ec0c897bb56902df00f583001068b15f8c8964ce70c6b13a621298f75527","abstract_canon_sha256":"ee8234249180b1065a8c84e4df466dd1c857a946cb9513abae64fd045b783714"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:37:55.285583Z","signature_b64":"DM4M1gtTOPKtDMs3bUVzOW71hES92YmjSVcyOVKSZXqIQrKjMqoXs9ZlRmktEHUbe3hPhu3MBohsqKsS+HM8Cw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"2e9c707bbb81aef09cdbf198bfcad6b0ad8f0533aa529edae4b86b33acc8cee7","last_reissued_at":"2026-05-18T04:37:55.284814Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:37:55.284814Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"The Semileptonic Decays $D\\to \\pi(\\rho) e \\nu$ and $B\\to \\pi (\\rho) e \\nu$ from QCD Sum Rules","license":"","headline":"","cross_cats":[],"primary_cat":"hep-ph","authors_text":"Patricia Ball","submitted_at":"1993-05-14T07:28:19Z","abstract_excerpt":"We investigate the semileptonic decays of B and D mesons into $\\pi$ and $\\rho$ mesons, respectively, by means of QCD sum rules. 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