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The result alpha_s(M_{Upsilon(1S)})=0.197\\pm 0.002_{Delta E_{HFS}^{exp}} \\pm 0.002_{scheme} \\pm 0.002_{delta <G^2>} \\pm 0.006_{delta m_b} \\pm 0.005_{ho}, alpha_s(M_{Z^0})=0.124\\pm 0.001_{Delta E_{HFS}^{exp}} \\pm 0.001_{scheme} \\pm 0.001_{delta <G^2>} \\pm 0.003_{delta m_b} \\pm 0.002_{ho}, is compatible with the current world average of alpha_s reported by the Particle Data Group, and shows "},"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":"0912.1081","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2009-12-07T16:57:57Z","cross_cats_sorted":[],"title_canon_sha256":"38136679197dec5d8bdcb3d4d2f06be2f42e2e232a4674eabcefcc500f09f9b4","abstract_canon_sha256":"03374cff54d6daaa756dd373ad3736315c2a727424ebc3a2125b156bc08d3fa6"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:27:58.257084Z","signature_b64":"49ddkOLGiBdrJE7ypxROZA0aiyqOXrnv171NOs2XnbnFEWXdPgKVrEUAhwxRqU+xXNz8pgWhI6mb9hmOVrd/Bg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"cc5cbecf98f1b1978c2b6418253665073c47fcf69f52ba19173aa82f3329285c","last_reissued_at":"2026-05-18T04:27:58.256523Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:27:58.256523Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Determining alpha_s from the hyperfine splitting mUpsilon(1S)-mEta(b)","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"hep-ph","authors_text":"Egidio Scrimieri, Pietro Colangelo, Pietro Santorelli","submitted_at":"2009-12-07T16:57:57Z","abstract_excerpt":"The measurement of the eta_b mass, together with a QCD result for the hyperfine splitting E_{HFS}=M_{Upsilon(1S)}-M_{eta_b}, allows us to determine the strong coupling constant alpha_s at a low energy scale. The result alpha_s(M_{Upsilon(1S)})=0.197\\pm 0.002_{Delta E_{HFS}^{exp}} \\pm 0.002_{scheme} \\pm 0.002_{delta <G^2>} \\pm 0.006_{delta m_b} \\pm 0.005_{ho}, alpha_s(M_{Z^0})=0.124\\pm 0.001_{Delta E_{HFS}^{exp}} \\pm 0.001_{scheme} \\pm 0.001_{delta <G^2>} \\pm 0.003_{delta m_b} \\pm 0.002_{ho}, is compatible with the current world average of alpha_s reported by the Particle Data Group, and shows "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0912.1081","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":""},"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"},"aliases":[{"alias_kind":"arxiv","alias_value":"0912.1081","created_at":"2026-05-18T04:27:58.256625+00:00"},{"alias_kind":"arxiv_version","alias_value":"0912.1081v2","created_at":"2026-05-18T04:27:58.256625+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0912.1081","created_at":"2026-05-18T04:27:58.256625+00:00"},{"alias_kind":"pith_short_12","alias_value":"ZROL5T4Y6GYZ","created_at":"2026-05-18T12:26:03.138858+00:00"},{"alias_kind":"pith_short_16","alias_value":"ZROL5T4Y6GYZPDBL","created_at":"2026-05-18T12:26:03.138858+00:00"},{"alias_kind":"pith_short_8","alias_value":"ZROL5T4Y","created_at":"2026-05-18T12:26:03.138858+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/ZROL5T4Y6GYZPDBLMQMCKNTFA4","json":"https://pith.science/pith/ZROL5T4Y6GYZPDBLMQMCKNTFA4.json","graph_json":"https://pith.science/api/pith-number/ZROL5T4Y6GYZPDBLMQMCKNTFA4/graph.json","events_json":"https://pith.science/api/pith-number/ZROL5T4Y6GYZPDBLMQMCKNTFA4/events.json","paper":"https://pith.science/paper/ZROL5T4Y"},"agent_actions":{"view_html":"https://pith.science/pith/ZROL5T4Y6GYZPDBLMQMCKNTFA4","download_json":"https://pith.science/pith/ZROL5T4Y6GYZPDBLMQMCKNTFA4.json","view_paper":"https://pith.science/paper/ZROL5T4Y","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=0912.1081&json=true","fetch_graph":"https://pith.science/api/pith-number/ZROL5T4Y6GYZPDBLMQMCKNTFA4/graph.json","fetch_events":"https://pith.science/api/pith-number/ZROL5T4Y6GYZPDBLMQMCKNTFA4/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/ZROL5T4Y6GYZPDBLMQMCKNTFA4/action/timestamp_anchor","attest_storage":"https://pith.science/pith/ZROL5T4Y6GYZPDBLMQMCKNTFA4/action/storage_attestation","attest_author":"https://pith.science/pith/ZROL5T4Y6GYZPDBLMQMCKNTFA4/action/author_attestation","sign_citation":"https://pith.science/pith/ZROL5T4Y6GYZPDBLMQMCKNTFA4/action/citation_signature","submit_replication":"https://pith.science/pith/ZROL5T4Y6GYZPDBLMQMCKNTFA4/action/replication_record"}},"created_at":"2026-05-18T04:27:58.256625+00:00","updated_at":"2026-05-18T04:27:58.256625+00:00"}