{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2010:HH2ESDOCFDQ4D2OGR7IODMI5NM","short_pith_number":"pith:HH2ESDOC","canonical_record":{"source":{"id":"1003.5054","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2010-03-26T07:09:44Z","cross_cats_sorted":["hep-ex","nucl-th"],"title_canon_sha256":"7eb587ece815963f5924ed351417a159ea17eff82b0d0bd8c5384f477e369ce5","abstract_canon_sha256":"6baa9274ac0ce5f692c72348a29c9095410bc247a5fd78662f1ed3bf1323dbc5"},"schema_version":"1.0"},"canonical_sha256":"39f4490dc228e1c1e9c68fd0e1b11d6b302510d15e2529313fd31d5faac7b668","source":{"kind":"arxiv","id":"1003.5054","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1003.5054","created_at":"2026-05-18T02:33:40Z"},{"alias_kind":"arxiv_version","alias_value":"1003.5054v2","created_at":"2026-05-18T02:33:40Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1003.5054","created_at":"2026-05-18T02:33:40Z"},{"alias_kind":"pith_short_12","alias_value":"HH2ESDOCFDQ4","created_at":"2026-05-18T12:26:07Z"},{"alias_kind":"pith_short_16","alias_value":"HH2ESDOCFDQ4D2OG","created_at":"2026-05-18T12:26:07Z"},{"alias_kind":"pith_short_8","alias_value":"HH2ESDOC","created_at":"2026-05-18T12:26:07Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2010:HH2ESDOCFDQ4D2OGR7IODMI5NM","target":"record","payload":{"canonical_record":{"source":{"id":"1003.5054","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2010-03-26T07:09:44Z","cross_cats_sorted":["hep-ex","nucl-th"],"title_canon_sha256":"7eb587ece815963f5924ed351417a159ea17eff82b0d0bd8c5384f477e369ce5","abstract_canon_sha256":"6baa9274ac0ce5f692c72348a29c9095410bc247a5fd78662f1ed3bf1323dbc5"},"schema_version":"1.0"},"canonical_sha256":"39f4490dc228e1c1e9c68fd0e1b11d6b302510d15e2529313fd31d5faac7b668","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:33:40.439423Z","signature_b64":"+ZruM97RdkzK7XOX0ZimjV33i+Ssc7ASMpFEX3TM9tJevD34XJFJOn73t4scoHjz46aj6ttN2x1TCobtGhVHBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"39f4490dc228e1c1e9c68fd0e1b11d6b302510d15e2529313fd31d5faac7b668","last_reissued_at":"2026-05-18T02:33:40.438993Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:33:40.438993Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1003.5054","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":"2026-05-18T02:33:40Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"vz1+NgKLK+SvoQZ7ZA97zjxSmobPD1RCYQhCFVObVg3PTb/eRoRWgH3lgfx3kpPx33hhRSrNxeN9O3Dzd7d1Cg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T01:59:32.792638Z"},"content_sha256":"cbce7f3ac77344f3a42609583c9913f2da61499961d1c0a0e9b25a95d6d11828","schema_version":"1.0","event_id":"sha256:cbce7f3ac77344f3a42609583c9913f2da61499961d1c0a0e9b25a95d6d11828"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2010:HH2ESDOCFDQ4D2OGR7IODMI5NM","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Nature of the a_0(980) Meson in the Light of Photon-Photon Collisions","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["hep-ex","nucl-th"],"primary_cat":"hep-ph","authors_text":"G.N. Shestakov, N.N. Achasov","submitted_at":"2010-03-26T07:09:44Z","abstract_excerpt":"New high-statistics Belle data on the reaction \\gamma\\gamma\\to\\pi^0\\eta are analyzed to clarify the two-photon production mechanisms and the nature of the a_0(980) meson. The obtained solution for the amplitude \\gamma\\gamma\\to\\pi^0\\eta is consistent with the chiral theory expectation for the \\pi\\eta scattering length, with the strong coupling of the a_0(980) to the \\pi\\eta, K\\bar K, and \\pi\\eta' channels, and with a key role of the rescattering mechanisms a_0(980)\\to(K\\bar K+ \\pi^0\\eta+\\pi^0\\eta')\\to\\gamma\\gamma in the a_0(980)\\to\\gamma\\gamma decay. Such a picture argues in favor of the q^2\\ba"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1003.5054","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":"2026-05-18T02:33:40Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"2jK1eXMD7R/6HV7T+Y/u5NOjnPfsEWfrU6kDEIS6mG8fPQd3AHmlaJmdP96VbUKxNWuqrV37tDrH/nPeU2w1CQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T01:59:32.792993Z"},"content_sha256":"5f8f96d1fbb90afdff52902dceda80b28797eb4d3d7ea999b5d8840c469667c6","schema_version":"1.0","event_id":"sha256:5f8f96d1fbb90afdff52902dceda80b28797eb4d3d7ea999b5d8840c469667c6"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/HH2ESDOCFDQ4D2OGR7IODMI5NM/bundle.json","state_url":"https://pith.science/pith/HH2ESDOCFDQ4D2OGR7IODMI5NM/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/HH2ESDOCFDQ4D2OGR7IODMI5NM/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":"2026-06-02T01:59:32Z","links":{"resolver":"https://pith.science/pith/HH2ESDOCFDQ4D2OGR7IODMI5NM","bundle":"https://pith.science/pith/HH2ESDOCFDQ4D2OGR7IODMI5NM/bundle.json","state":"https://pith.science/pith/HH2ESDOCFDQ4D2OGR7IODMI5NM/state.json","well_known_bundle":"https://pith.science/.well-known/pith/HH2ESDOCFDQ4D2OGR7IODMI5NM/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2010:HH2ESDOCFDQ4D2OGR7IODMI5NM","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":"6baa9274ac0ce5f692c72348a29c9095410bc247a5fd78662f1ed3bf1323dbc5","cross_cats_sorted":["hep-ex","nucl-th"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2010-03-26T07:09:44Z","title_canon_sha256":"7eb587ece815963f5924ed351417a159ea17eff82b0d0bd8c5384f477e369ce5"},"schema_version":"1.0","source":{"id":"1003.5054","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1003.5054","created_at":"2026-05-18T02:33:40Z"},{"alias_kind":"arxiv_version","alias_value":"1003.5054v2","created_at":"2026-05-18T02:33:40Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1003.5054","created_at":"2026-05-18T02:33:40Z"},{"alias_kind":"pith_short_12","alias_value":"HH2ESDOCFDQ4","created_at":"2026-05-18T12:26:07Z"},{"alias_kind":"pith_short_16","alias_value":"HH2ESDOCFDQ4D2OG","created_at":"2026-05-18T12:26:07Z"},{"alias_kind":"pith_short_8","alias_value":"HH2ESDOC","created_at":"2026-05-18T12:26:07Z"}],"graph_snapshots":[{"event_id":"sha256:5f8f96d1fbb90afdff52902dceda80b28797eb4d3d7ea999b5d8840c469667c6","target":"graph","created_at":"2026-05-18T02:33:40Z","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":"New high-statistics Belle data on the reaction \\gamma\\gamma\\to\\pi^0\\eta are analyzed to clarify the two-photon production mechanisms and the nature of the a_0(980) meson. The obtained solution for the amplitude \\gamma\\gamma\\to\\pi^0\\eta is consistent with the chiral theory expectation for the \\pi\\eta scattering length, with the strong coupling of the a_0(980) to the \\pi\\eta, K\\bar K, and \\pi\\eta' channels, and with a key role of the rescattering mechanisms a_0(980)\\to(K\\bar K+ \\pi^0\\eta+\\pi^0\\eta')\\to\\gamma\\gamma in the a_0(980)\\to\\gamma\\gamma decay. Such a picture argues in favor of the q^2\\ba","authors_text":"G.N. Shestakov, N.N. Achasov","cross_cats":["hep-ex","nucl-th"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2010-03-26T07:09:44Z","title":"Nature of the a_0(980) Meson in the Light of Photon-Photon Collisions"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1003.5054","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:cbce7f3ac77344f3a42609583c9913f2da61499961d1c0a0e9b25a95d6d11828","target":"record","created_at":"2026-05-18T02:33:40Z","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":"6baa9274ac0ce5f692c72348a29c9095410bc247a5fd78662f1ed3bf1323dbc5","cross_cats_sorted":["hep-ex","nucl-th"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2010-03-26T07:09:44Z","title_canon_sha256":"7eb587ece815963f5924ed351417a159ea17eff82b0d0bd8c5384f477e369ce5"},"schema_version":"1.0","source":{"id":"1003.5054","kind":"arxiv","version":2}},"canonical_sha256":"39f4490dc228e1c1e9c68fd0e1b11d6b302510d15e2529313fd31d5faac7b668","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"39f4490dc228e1c1e9c68fd0e1b11d6b302510d15e2529313fd31d5faac7b668","first_computed_at":"2026-05-18T02:33:40.438993Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:33:40.438993Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"+ZruM97RdkzK7XOX0ZimjV33i+Ssc7ASMpFEX3TM9tJevD34XJFJOn73t4scoHjz46aj6ttN2x1TCobtGhVHBA==","signature_status":"signed_v1","signed_at":"2026-05-18T02:33:40.439423Z","signed_message":"canonical_sha256_bytes"},"source_id":"1003.5054","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:cbce7f3ac77344f3a42609583c9913f2da61499961d1c0a0e9b25a95d6d11828","sha256:5f8f96d1fbb90afdff52902dceda80b28797eb4d3d7ea999b5d8840c469667c6"],"state_sha256":"16a467483adb8f822614a3889a84a36b8f9671465b71da1bfa450bf9805d42e7"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"VvnbCNLvRA0ouWiAlD1t+LiPVjN2JuB594jspD6+SQ30jjZ8/7OViEPAeabjbmGteKa5zV0sz0BrgvtFA18zDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-02T01:59:32.795074Z","bundle_sha256":"c8b64e64657bf73a5d0b864f204dcbd33cb11e413a9f8b9006cae7d30ea73e86"}}