{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2008:F2SHIWJOIDYZDZNY5L4RJ22ARZ","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":"f259bc3fbe046802db1a406cb65ab65fe5775ccbc2b6af4ced832705c6655f63","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-th","submitted_at":"2008-11-23T18:42:22Z","title_canon_sha256":"a995c45dcaec98dd60d284353a50fe4028c313eeccb279f891e83d95853a88f8"},"schema_version":"1.0","source":{"id":"0811.3766","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0811.3766","created_at":"2026-07-04T15:40:29Z"},{"alias_kind":"arxiv_version","alias_value":"0811.3766v1","created_at":"2026-07-04T15:40:29Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0811.3766","created_at":"2026-07-04T15:40:29Z"},{"alias_kind":"pith_short_12","alias_value":"F2SHIWJOIDYZ","created_at":"2026-07-04T15:40:29Z"},{"alias_kind":"pith_short_16","alias_value":"F2SHIWJOIDYZDZNY","created_at":"2026-07-04T15:40:29Z"},{"alias_kind":"pith_short_8","alias_value":"F2SHIWJO","created_at":"2026-07-04T15:40:29Z"}],"graph_snapshots":[{"event_id":"sha256:47e63c7bf3ed80061cb78e1f59c3e01119d3dfa6f57644aed90bde5fdf69454d","target":"graph","created_at":"2026-07-04T15:40:29Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/0811.3766/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"It is shown that data on strange particle production as a function of centrality in Au-Au collisions at \\sqrt(s)_{NN}= 200 GeV can be explained with a superposition of emission from a hadron gas at full chemical equilibrium (core) and from nucleon-nucleon collisions at the boundary (corona) of the overlapping region of the two colliding nuclei. This model nicely accounts for the enhancement of phi meson and strange particle production as a function of centrality observed in relativistic heavy ion collisions at that energy. The enhancement is mainly a geometrical effect, that is the increasing ","authors_text":"F. Becattini (U. Florence, INFN Florence), J. Manninen (INFN Florence)","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-th","submitted_at":"2008-11-23T18:42:22Z","title":"Centrality dependence of strangeness production in heavy-ion collisions as a geometrical effect of core-corona superposition"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0811.3766","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":"sha256:58ec1fcd234b8cbe9fc822d0bd0f4af67e97cf56cba8decae5ab6c6beb259ec2","target":"record","created_at":"2026-07-04T15:40:29Z","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":"f259bc3fbe046802db1a406cb65ab65fe5775ccbc2b6af4ced832705c6655f63","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-th","submitted_at":"2008-11-23T18:42:22Z","title_canon_sha256":"a995c45dcaec98dd60d284353a50fe4028c313eeccb279f891e83d95853a88f8"},"schema_version":"1.0","source":{"id":"0811.3766","kind":"arxiv","version":1}},"canonical_sha256":"2ea474592e40f191e5b8eaf914eb408e5bc3b2776c0752dd8e679bb7d8d68976","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"2ea474592e40f191e5b8eaf914eb408e5bc3b2776c0752dd8e679bb7d8d68976","first_computed_at":"2026-07-04T15:40:29.673357Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T15:40:29.673357Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"F0iXuPFWNMbF0nsNnkgDbmtXHhTZzV//Brcs/cBi/Pl+cEDtsCbTeb9ApAWqdt40WStr1phYmt3xZcl+3RgBCw==","signature_status":"signed_v1","signed_at":"2026-07-04T15:40:29.673768Z","signed_message":"canonical_sha256_bytes"},"source_id":"0811.3766","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:58ec1fcd234b8cbe9fc822d0bd0f4af67e97cf56cba8decae5ab6c6beb259ec2","sha256:47e63c7bf3ed80061cb78e1f59c3e01119d3dfa6f57644aed90bde5fdf69454d"],"state_sha256":"59d287e9eed8a077926405f423c0515cd89cbdcca65196912776cc2aa7863cfe"}