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With the perturbative correction and three successive power corrections, the meson correlator in an axial field becomes one of the best known correlators. In spite of this, the corresponding sum rule is not very stable. It yields the result g_1 F^2/(380MeV)^3 = 0.1 - 0.2, where F^2 = f_M^2 m/4 = (380MeV)^3 is the central value of the heavy meson decay constant with th"},"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/9706421","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"hep-ph","submitted_at":"1997-06-19T19:25:41Z","cross_cats_sorted":[],"title_canon_sha256":"3192d6a3b3415591076df360385f36c1becf2650c45104bf11db8adadf12e28b","abstract_canon_sha256":"d3edfa926bb2902c8ef0fbf5cdc56bdc918c12dc2a057dc206039d389d91d635"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:13:25.302988Z","signature_b64":"09iNkVCFep5D+cGbiOu7wsDfCaOBzTsrW44q2HY9zsE3ffmsuPYADOZlC9dljj+5N7glb8wmDvHLHK4+OR+oAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"9f6fea1df39bd7b535dabdfb22848dbffb334f1316cd8275479e9b30b5bb88ef","last_reissued_at":"2026-05-18T04:13:25.302413Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:13:25.302413Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Couplings of heavy hadrons with soft pions from QCD sum rules","license":"","headline":"","cross_cats":[],"primary_cat":"hep-ph","authors_text":"A. 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