{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2010:RUJVMDGINCMVCSSLGIKMAI2A2M","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":"429cd0e847d59477374b52a78f4239d2ad906fcb5eead0d87411b4f809a52b31","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ex","submitted_at":"2010-02-01T16:41:46Z","title_canon_sha256":"c3e09bf2024d38ed00b77f334a2e68fe9bdd5f84d92a8ca8fe27a3d12d234e4b"},"schema_version":"1.0","source":{"id":"1002.0281","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1002.0281","created_at":"2026-05-18T02:33:48Z"},{"alias_kind":"arxiv_version","alias_value":"1002.0281v2","created_at":"2026-05-18T02:33:48Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1002.0281","created_at":"2026-05-18T02:33:48Z"},{"alias_kind":"pith_short_12","alias_value":"RUJVMDGINCMV","created_at":"2026-05-18T12:26:13Z"},{"alias_kind":"pith_short_16","alias_value":"RUJVMDGINCMVCSSL","created_at":"2026-05-18T12:26:13Z"},{"alias_kind":"pith_short_8","alias_value":"RUJVMDGI","created_at":"2026-05-18T12:26:13Z"}],"graph_snapshots":[{"event_id":"sha256:0a83140658c906ae5e921ea9d835a145544b81e7b81f9b5572ed4f7d4cce1154","target":"graph","created_at":"2026-05-18T02:33:48Z","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":"A search for the Z(3930) resonance in gamma gamma production of the DDbar system has been performed using a data sample corresponding to an integrated luminosity of 384 fb^-1 recorded by the BABAR experiment at the PEP-II asymmetric-energy electron-positron collider. The DDbar invariant mass distribution shows clear evidence of the Z(3930) state with a significance of 5.8 sigma. We determine mass and width values of (3926.7 +- 2.7 +- 1.1) MeV/c^2 and (21.3 +- 6.8 +- 3.6) MeV, respectively. A decay angular analysis provides evidence that the Z(3930) is a tensor state with positive parity and C-","authors_text":"et al, the BABAR Collaboration: B. Aubert","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ex","submitted_at":"2010-02-01T16:41:46Z","title":"Observation of the chi_c2(2P) meson in the reaction gamma gamma -> D Dbar at BABAR"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1002.0281","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":"sha256:9f68def15b27ceb54392b2a6e254e3ca2d840106730e0e13982fd3a756eb12e7","target":"record","created_at":"2026-05-18T02:33:48Z","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":"429cd0e847d59477374b52a78f4239d2ad906fcb5eead0d87411b4f809a52b31","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ex","submitted_at":"2010-02-01T16:41:46Z","title_canon_sha256":"c3e09bf2024d38ed00b77f334a2e68fe9bdd5f84d92a8ca8fe27a3d12d234e4b"},"schema_version":"1.0","source":{"id":"1002.0281","kind":"arxiv","version":2}},"canonical_sha256":"8d13560cc86899514a4b3214c02340d31a7c88c62ef2cac8dbd19e5686546d8e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"8d13560cc86899514a4b3214c02340d31a7c88c62ef2cac8dbd19e5686546d8e","first_computed_at":"2026-05-18T02:33:48.861895Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:33:48.861895Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"LTjJOUPFz4pBwcbb1BiFZ7TyOYFjQk/zvEsB3prv5umbNLD5e44OCTClPSbn7ZYTWZLDsaiy1jiOcHu+HBfiCg==","signature_status":"signed_v1","signed_at":"2026-05-18T02:33:48.862474Z","signed_message":"canonical_sha256_bytes"},"source_id":"1002.0281","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:9f68def15b27ceb54392b2a6e254e3ca2d840106730e0e13982fd3a756eb12e7","sha256:0a83140658c906ae5e921ea9d835a145544b81e7b81f9b5572ed4f7d4cce1154"],"state_sha256":"63f2a139edb473e9e9d500ba49e603ef3743c20344924ccb148c09c794bc3c3e"}