{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:CY2F6EZQHGRGMSIL7A2ZPMI55J","short_pith_number":"pith:CY2F6EZQ","canonical_record":{"source":{"id":"1206.5764","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2012-06-25T18:36:34Z","cross_cats_sorted":[],"title_canon_sha256":"103a399ecacb1e5d3ccec76e1e7239a42820539c318b845e46be34ecde3eb7b4","abstract_canon_sha256":"107e633c94cfcb107eca721fdde4641333509ad922935e31f95a43e6b47a0dbb"},"schema_version":"1.0"},"canonical_sha256":"16345f133039a266490bf83597b11dea5e0f57d4fb7d15def53bccd212b9b442","source":{"kind":"arxiv","id":"1206.5764","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1206.5764","created_at":"2026-05-18T03:40:36Z"},{"alias_kind":"arxiv_version","alias_value":"1206.5764v2","created_at":"2026-05-18T03:40:36Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1206.5764","created_at":"2026-05-18T03:40:36Z"},{"alias_kind":"pith_short_12","alias_value":"CY2F6EZQHGRG","created_at":"2026-05-18T12:27:01Z"},{"alias_kind":"pith_short_16","alias_value":"CY2F6EZQHGRGMSIL","created_at":"2026-05-18T12:27:01Z"},{"alias_kind":"pith_short_8","alias_value":"CY2F6EZQ","created_at":"2026-05-18T12:27:01Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:CY2F6EZQHGRGMSIL7A2ZPMI55J","target":"record","payload":{"canonical_record":{"source":{"id":"1206.5764","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2012-06-25T18:36:34Z","cross_cats_sorted":[],"title_canon_sha256":"103a399ecacb1e5d3ccec76e1e7239a42820539c318b845e46be34ecde3eb7b4","abstract_canon_sha256":"107e633c94cfcb107eca721fdde4641333509ad922935e31f95a43e6b47a0dbb"},"schema_version":"1.0"},"canonical_sha256":"16345f133039a266490bf83597b11dea5e0f57d4fb7d15def53bccd212b9b442","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:40:36.162039Z","signature_b64":"5AphYXA3qbBiFBt3KbOY8nYlkoEzVIkWoahFCn0/Z0tQIw90m3DiJyGWimGeTk4Z8r9Xft6b2Cy1kispX5S8BA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"16345f133039a266490bf83597b11dea5e0f57d4fb7d15def53bccd212b9b442","last_reissued_at":"2026-05-18T03:40:36.161264Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:40:36.161264Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1206.5764","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T03:40:36Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"92pX0VWggndIPAVzJqepkePLF7V26nNCe1AHuEWqxGDoy6ma0Hjv7JgJocPBCm8Y6KuroVLvnK5Dexl2qr3WCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-19T15:07:41.079090Z"},"content_sha256":"58bac60effd8830800cc8152fe09c5079699233ada17112b98c81f79b63481d9","schema_version":"1.0","event_id":"sha256:58bac60effd8830800cc8152fe09c5079699233ada17112b98c81f79b63481d9"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:CY2F6EZQHGRGMSIL7A2ZPMI55J","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Universal behaviour of the $\\gamma^*\\gamma\\to (\\pi^0,\\eta,\\eta')$ transition form factors","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"hep-ph","authors_text":"Berthold Stech, Dmitri Melikhov","submitted_at":"2012-06-25T18:36:34Z","abstract_excerpt":"The photon transition form factors of $\\pi$, $\\eta$ and $\\eta'$ are discussed in view of recent measurements. It is shown that the exact axial anomaly sum rule allows a precise comparison of all three form factors at high-$Q^2$ independent of the different structures and distribution amplitudes of the participating pseudoscalar mesons. We conclude: (i) The $\\pi\\gamma$ form factor reported by Belle is in excellent agreement with the non-strange I=0 component of the $\\eta$ and $\\eta'$ form factors obtained from the BaBar measurements. (ii) Within errors, the $\\pi \\gamma$ form factor from Belle i"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1206.5764","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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T03:40:36Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"/Rf/+Tpg1DWSv1yx4MApXUIttfRD6KqYI3dqTsYHkv1Xi1UEIf/U9bb3RMCaZ/33+YZam2Wi1HViIaru4WaTBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-19T15:07:41.079455Z"},"content_sha256":"5a4df5515d46583341062eaa426d1b70930c2bebf09c20bca012bb9c6448a4bf","schema_version":"1.0","event_id":"sha256:5a4df5515d46583341062eaa426d1b70930c2bebf09c20bca012bb9c6448a4bf"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/CY2F6EZQHGRGMSIL7A2ZPMI55J/bundle.json","state_url":"https://pith.science/pith/CY2F6EZQHGRGMSIL7A2ZPMI55J/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/CY2F6EZQHGRGMSIL7A2ZPMI55J/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":"2026-05-19T15:07:41Z","links":{"resolver":"https://pith.science/pith/CY2F6EZQHGRGMSIL7A2ZPMI55J","bundle":"https://pith.science/pith/CY2F6EZQHGRGMSIL7A2ZPMI55J/bundle.json","state":"https://pith.science/pith/CY2F6EZQHGRGMSIL7A2ZPMI55J/state.json","well_known_bundle":"https://pith.science/.well-known/pith/CY2F6EZQHGRGMSIL7A2ZPMI55J/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:CY2F6EZQHGRGMSIL7A2ZPMI55J","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":"107e633c94cfcb107eca721fdde4641333509ad922935e31f95a43e6b47a0dbb","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2012-06-25T18:36:34Z","title_canon_sha256":"103a399ecacb1e5d3ccec76e1e7239a42820539c318b845e46be34ecde3eb7b4"},"schema_version":"1.0","source":{"id":"1206.5764","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1206.5764","created_at":"2026-05-18T03:40:36Z"},{"alias_kind":"arxiv_version","alias_value":"1206.5764v2","created_at":"2026-05-18T03:40:36Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1206.5764","created_at":"2026-05-18T03:40:36Z"},{"alias_kind":"pith_short_12","alias_value":"CY2F6EZQHGRG","created_at":"2026-05-18T12:27:01Z"},{"alias_kind":"pith_short_16","alias_value":"CY2F6EZQHGRGMSIL","created_at":"2026-05-18T12:27:01Z"},{"alias_kind":"pith_short_8","alias_value":"CY2F6EZQ","created_at":"2026-05-18T12:27:01Z"}],"graph_snapshots":[{"event_id":"sha256:5a4df5515d46583341062eaa426d1b70930c2bebf09c20bca012bb9c6448a4bf","target":"graph","created_at":"2026-05-18T03:40:36Z","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":"The photon transition form factors of $\\pi$, $\\eta$ and $\\eta'$ are discussed in view of recent measurements. It is shown that the exact axial anomaly sum rule allows a precise comparison of all three form factors at high-$Q^2$ independent of the different structures and distribution amplitudes of the participating pseudoscalar mesons. We conclude: (i) The $\\pi\\gamma$ form factor reported by Belle is in excellent agreement with the non-strange I=0 component of the $\\eta$ and $\\eta'$ form factors obtained from the BaBar measurements. (ii) Within errors, the $\\pi \\gamma$ form factor from Belle i","authors_text":"Berthold Stech, Dmitri Melikhov","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2012-06-25T18:36:34Z","title":"Universal behaviour of the $\\gamma^*\\gamma\\to (\\pi^0,\\eta,\\eta')$ transition form factors"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1206.5764","kind":"arxiv","version":2},"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":"sha256:58bac60effd8830800cc8152fe09c5079699233ada17112b98c81f79b63481d9","target":"record","created_at":"2026-05-18T03:40:36Z","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":"107e633c94cfcb107eca721fdde4641333509ad922935e31f95a43e6b47a0dbb","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2012-06-25T18:36:34Z","title_canon_sha256":"103a399ecacb1e5d3ccec76e1e7239a42820539c318b845e46be34ecde3eb7b4"},"schema_version":"1.0","source":{"id":"1206.5764","kind":"arxiv","version":2}},"canonical_sha256":"16345f133039a266490bf83597b11dea5e0f57d4fb7d15def53bccd212b9b442","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"16345f133039a266490bf83597b11dea5e0f57d4fb7d15def53bccd212b9b442","first_computed_at":"2026-05-18T03:40:36.161264Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:40:36.161264Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"5AphYXA3qbBiFBt3KbOY8nYlkoEzVIkWoahFCn0/Z0tQIw90m3DiJyGWimGeTk4Z8r9Xft6b2Cy1kispX5S8BA==","signature_status":"signed_v1","signed_at":"2026-05-18T03:40:36.162039Z","signed_message":"canonical_sha256_bytes"},"source_id":"1206.5764","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:58bac60effd8830800cc8152fe09c5079699233ada17112b98c81f79b63481d9","sha256:5a4df5515d46583341062eaa426d1b70930c2bebf09c20bca012bb9c6448a4bf"],"state_sha256":"e1e5a754cd5407f1237ad84925e1f705245317230ff1ed60fa4570047e7ae450"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"jZ8vIi6ZSQMsgDbcOVRjJPnhlfNddqKC74bHGS9QBL6KrbOes0RwxlEFCc1CM6Mq768BPqyHfCUxCzBTpgefBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-19T15:07:41.082235Z","bundle_sha256":"53b0cb276d0cbd3001b8cabeb361f69d827b2629bb38b022fada3666ba5b121c"}}