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The Contour Improved Fixed Order Perturbation Theory gives alpha_s(mtau**2) = 0.348 +- 0.009 +- 0.019 at the tau-mass scale and alpha_s(mz**2) = 0.1219 +- 0.00"},"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-ex/9808019","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"hep-ex","submitted_at":"1998-08-20T06:45:52Z","cross_cats_sorted":[],"title_canon_sha256":"ee0f5d6d36af8803d7ccc4223971e3e675c0869c275447a3c00b839ffcf80d88","abstract_canon_sha256":"e33812dc8e3e73a54ffea8bac4f889b1b79d1c16a403d7e893e37c72d8a6e1d9"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T15:32:16.955480Z","signature_b64":"DNZVqRf9jONJm5lVH5H6Ha8huqAbH2PKRpIOEDrlDxYwDwaS7xaEo2tZi4EvfHeq2UiTzFebqCjwKL15ORGiAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"0579a00f8cdebbe03e0d92aa2fcfe8cf6b5cb3f11a86ef8bc4c06f8beb155785","last_reissued_at":"2026-07-04T15:32:16.955106Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T15:32:16.955106Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Measurement of the Strong Coupling Constant and the Vector and Axial-Vector Spectral Functions in Hadronic Tau Decays","license":"","headline":"","cross_cats":[],"primary_cat":"hep-ex","authors_text":"K.Ackerstaff et al, The OPAL collaboration","submitted_at":"1998-08-20T06:45:52Z","abstract_excerpt":"The spectral functions of the vector current and the axial-vector current have been measured in hadronic tau decays using the OPAL detector at LEP. 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