{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:A23AUBY7EB43NXRQZGHAG2WO6G","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"c76d7084e7b3f1a96d3c78eb522e49aa599a9d1346a77669267a690230de5fc9","cross_cats_sorted":["nucl-th"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2013-09-09T17:04:23Z","title_canon_sha256":"f3385a5ae93e0cb8fc44dc9b028d5fc450cfda5b6127c0ddb7e385a385189ceb"},"schema_version":"1.0","source":{"id":"1309.2225","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1309.2225","created_at":"2026-05-18T01:23:40Z"},{"alias_kind":"arxiv_version","alias_value":"1309.2225v1","created_at":"2026-05-18T01:23:40Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1309.2225","created_at":"2026-05-18T01:23:40Z"},{"alias_kind":"pith_short_12","alias_value":"A23AUBY7EB43","created_at":"2026-05-18T12:27:38Z"},{"alias_kind":"pith_short_16","alias_value":"A23AUBY7EB43NXRQ","created_at":"2026-05-18T12:27:38Z"},{"alias_kind":"pith_short_8","alias_value":"A23AUBY7","created_at":"2026-05-18T12:27:38Z"}],"graph_snapshots":[{"event_id":"sha256:205659216d05f4ae2af66f815e17aca92d63bd122fc310bc36794aef80f45c78","target":"graph","created_at":"2026-05-18T01:23:40Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"paper":{"abstract_excerpt":"We compute the charged pion loop contribution to the muon anomalous magnetic moment $a_\\mu$, taking into account the effect of the charged pion polarizability, $(\\alpha_1-\\beta_1)_{\\pi^+}$. We evaluate this contribution using two different models that are consistent with the requirements of chiral symmetry in the low-momentum regime and perturbative quantum chromodynamics in the asymptotic region. The result increases the disagreement between the present experimental value for $a_\\mu$ and the theoretical, Standard Model prediction by as much as $\\sim 60\\times 10^{-11}$, depending on the value ","authors_text":"Kevin T. Engel, Michael J. Ramsey-Musolf","cross_cats":["nucl-th"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2013-09-09T17:04:23Z","title":"The Muon Anomalous Magnetic Moment and the Pion Polarizability"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1309.2225","kind":"arxiv","version":1},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:5f576f6854f1f9163651b5d6146779ff8be3a924df6bd692e2e582a8646743b5","target":"record","created_at":"2026-05-18T01:23:40Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"c76d7084e7b3f1a96d3c78eb522e49aa599a9d1346a77669267a690230de5fc9","cross_cats_sorted":["nucl-th"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2013-09-09T17:04:23Z","title_canon_sha256":"f3385a5ae93e0cb8fc44dc9b028d5fc450cfda5b6127c0ddb7e385a385189ceb"},"schema_version":"1.0","source":{"id":"1309.2225","kind":"arxiv","version":1}},"canonical_sha256":"06b60a071f2079b6de30c98e036acef18c6abf65e2c349281d8ad0d72105e366","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"06b60a071f2079b6de30c98e036acef18c6abf65e2c349281d8ad0d72105e366","first_computed_at":"2026-05-18T01:23:40.393529Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:23:40.393529Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"IXBbSylLeUlOyfngADwFsgdzn/HvUaeQapF/AAYdjBJ/rmlv5WTr5EoCkq8iiVgMJHfrJX42yvoY0W3Pu9HrBg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:23:40.394164Z","signed_message":"canonical_sha256_bytes"},"source_id":"1309.2225","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:5f576f6854f1f9163651b5d6146779ff8be3a924df6bd692e2e582a8646743b5","sha256:205659216d05f4ae2af66f815e17aca92d63bd122fc310bc36794aef80f45c78"],"state_sha256":"1762af730ec9dd380e5eb6fa3fa27006d22fd3f0ac03ced6db2aa0efa12a683e"}