{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:WZHQ7LKOCT7GZQPCUF5NEBSDHD","short_pith_number":"pith:WZHQ7LKO","canonical_record":{"source":{"id":"1809.06175","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"hep-ph","submitted_at":"2018-09-17T13:04:30Z","cross_cats_sorted":[],"title_canon_sha256":"951f1626a3ae701db9ed2e510f6000e69955ef47fe7aedc92efe95356f6ae606","abstract_canon_sha256":"f0214ba1fe95e2823ff03c7b16f45227f2e3fdd73a343c53b098daebe8445ffa"},"schema_version":"1.0"},"canonical_sha256":"b64f0fad4e14fe6cc1e2a17ad2064338eab231088b92b4baebaa8bdf928b460a","source":{"kind":"arxiv","id":"1809.06175","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1809.06175","created_at":"2026-05-17T23:59:05Z"},{"alias_kind":"arxiv_version","alias_value":"1809.06175v1","created_at":"2026-05-17T23:59:05Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1809.06175","created_at":"2026-05-17T23:59:05Z"},{"alias_kind":"pith_short_12","alias_value":"WZHQ7LKOCT7G","created_at":"2026-05-18T12:33:01Z"},{"alias_kind":"pith_short_16","alias_value":"WZHQ7LKOCT7GZQPC","created_at":"2026-05-18T12:33:01Z"},{"alias_kind":"pith_short_8","alias_value":"WZHQ7LKO","created_at":"2026-05-18T12:33:01Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:WZHQ7LKOCT7GZQPCUF5NEBSDHD","target":"record","payload":{"canonical_record":{"source":{"id":"1809.06175","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"hep-ph","submitted_at":"2018-09-17T13:04:30Z","cross_cats_sorted":[],"title_canon_sha256":"951f1626a3ae701db9ed2e510f6000e69955ef47fe7aedc92efe95356f6ae606","abstract_canon_sha256":"f0214ba1fe95e2823ff03c7b16f45227f2e3fdd73a343c53b098daebe8445ffa"},"schema_version":"1.0"},"canonical_sha256":"b64f0fad4e14fe6cc1e2a17ad2064338eab231088b92b4baebaa8bdf928b460a","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:59:05.146564Z","signature_b64":"qcwTroNtS1Iusdft96W8osljIjF9/5FrD6poiKehZ6tR9XzMNj69XCXqStEOVzBvNyNfYEd+x/z6rZIMo7KCBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"b64f0fad4e14fe6cc1e2a17ad2064338eab231088b92b4baebaa8bdf928b460a","last_reissued_at":"2026-05-17T23:59:05.146166Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:59:05.146166Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1809.06175","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-17T23:59:05Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"E9i9LZ520EqcxLuRPhSFkPlYe5s3eVIwYcRb2fcfbgEg1gJwyBFkri/A9tcNi1Ir2Rz9g86yAH3RhaoOvD4ZBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T21:00:14.332780Z"},"content_sha256":"0cddca65e0418cd90af25bcc0780e45cfedcab5fd5d897f8d4863a620d10501e","schema_version":"1.0","event_id":"sha256:0cddca65e0418cd90af25bcc0780e45cfedcab5fd5d897f8d4863a620d10501e"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:WZHQ7LKOCT7GZQPCUF5NEBSDHD","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Pseudoscalar pole contribution to the hadronic light-by-light piece of $a_\\mu$","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"hep-ph","authors_text":"Adolfo Guevara, JJ Sanz Cillero, Pablo Roig","submitted_at":"2018-09-17T13:04:30Z","abstract_excerpt":"We have studied the $P\\to\\gamma^\\star\\gamma^\\star$ form factor in Resonance Chiral Theory, with $P = \\pi^0,\\eta,\\eta'$, to compute the contribution of the pseudoscalar pole to the hadronic light-by-light piece of the anomalous magnetic moment of the muon. In this work we allow the leading $U(3)$ chiral symmetry breaking terms, obtaining the most general expression for the form factor of order $\\mathcal{O}(m_P^2)$. The parameters of the Effective Field Theory are obtained by means of short distance constraints on the form factor and matching with the expected behavior from QCD. Those parameters"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1809.06175","kind":"arxiv","version":1},"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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-17T23:59:05Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"mDBCFiRcJ3mvCZQVLs72s9CjOaMwrM5ZqWpOYrBDVUj7jHj93DWwT6FlsAJt+clgnmdJSobGRWcY+yMvULCXAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T21:00:14.333139Z"},"content_sha256":"a7e67143ef8ea199cbab00223fd97091687f57bf50cb1c2563ac8dddff7752b7","schema_version":"1.0","event_id":"sha256:a7e67143ef8ea199cbab00223fd97091687f57bf50cb1c2563ac8dddff7752b7"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/WZHQ7LKOCT7GZQPCUF5NEBSDHD/bundle.json","state_url":"https://pith.science/pith/WZHQ7LKOCT7GZQPCUF5NEBSDHD/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/WZHQ7LKOCT7GZQPCUF5NEBSDHD/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-05-28T21:00:14Z","links":{"resolver":"https://pith.science/pith/WZHQ7LKOCT7GZQPCUF5NEBSDHD","bundle":"https://pith.science/pith/WZHQ7LKOCT7GZQPCUF5NEBSDHD/bundle.json","state":"https://pith.science/pith/WZHQ7LKOCT7GZQPCUF5NEBSDHD/state.json","well_known_bundle":"https://pith.science/.well-known/pith/WZHQ7LKOCT7GZQPCUF5NEBSDHD/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:WZHQ7LKOCT7GZQPCUF5NEBSDHD","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":"f0214ba1fe95e2823ff03c7b16f45227f2e3fdd73a343c53b098daebe8445ffa","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"hep-ph","submitted_at":"2018-09-17T13:04:30Z","title_canon_sha256":"951f1626a3ae701db9ed2e510f6000e69955ef47fe7aedc92efe95356f6ae606"},"schema_version":"1.0","source":{"id":"1809.06175","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1809.06175","created_at":"2026-05-17T23:59:05Z"},{"alias_kind":"arxiv_version","alias_value":"1809.06175v1","created_at":"2026-05-17T23:59:05Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1809.06175","created_at":"2026-05-17T23:59:05Z"},{"alias_kind":"pith_short_12","alias_value":"WZHQ7LKOCT7G","created_at":"2026-05-18T12:33:01Z"},{"alias_kind":"pith_short_16","alias_value":"WZHQ7LKOCT7GZQPC","created_at":"2026-05-18T12:33:01Z"},{"alias_kind":"pith_short_8","alias_value":"WZHQ7LKO","created_at":"2026-05-18T12:33:01Z"}],"graph_snapshots":[{"event_id":"sha256:a7e67143ef8ea199cbab00223fd97091687f57bf50cb1c2563ac8dddff7752b7","target":"graph","created_at":"2026-05-17T23:59:05Z","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 have studied the $P\\to\\gamma^\\star\\gamma^\\star$ form factor in Resonance Chiral Theory, with $P = \\pi^0,\\eta,\\eta'$, to compute the contribution of the pseudoscalar pole to the hadronic light-by-light piece of the anomalous magnetic moment of the muon. In this work we allow the leading $U(3)$ chiral symmetry breaking terms, obtaining the most general expression for the form factor of order $\\mathcal{O}(m_P^2)$. The parameters of the Effective Field Theory are obtained by means of short distance constraints on the form factor and matching with the expected behavior from QCD. Those parameters","authors_text":"Adolfo Guevara, JJ Sanz Cillero, Pablo Roig","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"hep-ph","submitted_at":"2018-09-17T13:04:30Z","title":"Pseudoscalar pole contribution to the hadronic light-by-light piece of $a_\\mu$"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1809.06175","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":"sha256:0cddca65e0418cd90af25bcc0780e45cfedcab5fd5d897f8d4863a620d10501e","target":"record","created_at":"2026-05-17T23:59:05Z","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":"f0214ba1fe95e2823ff03c7b16f45227f2e3fdd73a343c53b098daebe8445ffa","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"hep-ph","submitted_at":"2018-09-17T13:04:30Z","title_canon_sha256":"951f1626a3ae701db9ed2e510f6000e69955ef47fe7aedc92efe95356f6ae606"},"schema_version":"1.0","source":{"id":"1809.06175","kind":"arxiv","version":1}},"canonical_sha256":"b64f0fad4e14fe6cc1e2a17ad2064338eab231088b92b4baebaa8bdf928b460a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b64f0fad4e14fe6cc1e2a17ad2064338eab231088b92b4baebaa8bdf928b460a","first_computed_at":"2026-05-17T23:59:05.146166Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:59:05.146166Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"qcwTroNtS1Iusdft96W8osljIjF9/5FrD6poiKehZ6tR9XzMNj69XCXqStEOVzBvNyNfYEd+x/z6rZIMo7KCBQ==","signature_status":"signed_v1","signed_at":"2026-05-17T23:59:05.146564Z","signed_message":"canonical_sha256_bytes"},"source_id":"1809.06175","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:0cddca65e0418cd90af25bcc0780e45cfedcab5fd5d897f8d4863a620d10501e","sha256:a7e67143ef8ea199cbab00223fd97091687f57bf50cb1c2563ac8dddff7752b7"],"state_sha256":"9a18b3a266954beefc9742f4be92e830a414a61a0a797880d3e894d1cff13363"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"+hGZ/p3uzcnwMTy4sWAZKWrbx9pCSk5YYxTGiXeicj1OSYSZK4zhyGl3W/OrJQQcfKI7Td4kGmLcK5hSu4yyBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-28T21:00:14.335298Z","bundle_sha256":"60dbfc594c18a0a5072e6890ecd3c5b70e29fb1f02b99d9093114b8d919d4b21"}}