{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2009:LG4VEHAQW2W37B3LDLQSBF6OGM","short_pith_number":"pith:LG4VEHAQ","schema_version":"1.0","canonical_sha256":"59b9521c10b6adbf876b1ae12097ce33309151360b0fca47314e3932a686801d","source":{"kind":"arxiv","id":"0912.5526","version":2},"attestation_state":"computed","paper":{"title":"Indirect observation of an in-medium eta' mass reduction in sqrt(s_{NN})=200 GeV Au+Au collisions","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["hep-ex","hep-ph","nucl-th"],"primary_cat":"nucl-ex","authors_text":"J. Sziklai (Mta Kfki Rmki), MTA KFKI RMKI), R. Vertesi (Mta Kfki Rmki), T. Csorgo (Harvard University","submitted_at":"2009-12-30T20:49:24Z","abstract_excerpt":"PHENIX and STAR data on the intercept parameter of the two-pion Bose-Einstein correlation functions in sqrt(s_{NN}) = 200 GeV Au+Au collisions are analyzed in terms of different models of hadronic multiplicities. To describe this combined PHENIX and STAR dataset, an in-medium eta' mass reduction of at least 200 MeV is needed, at the 99.9 % confidence level in the considered model class. Such a significant eta' mass modification may indicate the restoration of the U_A(1) symmetry in a hot and dense hadronic matter and the return of the 9th \"prodigal\" Goldstone boson."},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"0912.5526","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-ex","submitted_at":"2009-12-30T20:49:24Z","cross_cats_sorted":["hep-ex","hep-ph","nucl-th"],"title_canon_sha256":"580cd2ffc9bfa7d793d406033c36886d3a9713185490a43125a27d2034447c25","abstract_canon_sha256":"6636754906f1e98fffe346d6b7b8292e7b6497c755f161f657082af2fee20f16"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:38:48.553749Z","signature_b64":"l1AR2H4GGTTXFkCAu4GXaZCGur8pbp/IyCSGvyojFQBPQdDhSRGUYRGkN09k+cofZaCqpiin7N8nty6MYZnbBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"59b9521c10b6adbf876b1ae12097ce33309151360b0fca47314e3932a686801d","last_reissued_at":"2026-05-18T04:38:48.553304Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:38:48.553304Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Indirect observation of an in-medium eta' mass reduction in sqrt(s_{NN})=200 GeV Au+Au collisions","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["hep-ex","hep-ph","nucl-th"],"primary_cat":"nucl-ex","authors_text":"J. Sziklai (Mta Kfki Rmki), MTA KFKI RMKI), R. Vertesi (Mta Kfki Rmki), T. Csorgo (Harvard University","submitted_at":"2009-12-30T20:49:24Z","abstract_excerpt":"PHENIX and STAR data on the intercept parameter of the two-pion Bose-Einstein correlation functions in sqrt(s_{NN}) = 200 GeV Au+Au collisions are analyzed in terms of different models of hadronic multiplicities. To describe this combined PHENIX and STAR dataset, an in-medium eta' mass reduction of at least 200 MeV is needed, at the 99.9 % confidence level in the considered model class. Such a significant eta' mass modification may indicate the restoration of the U_A(1) symmetry in a hot and dense hadronic matter and the return of the 9th \"prodigal\" Goldstone boson."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0912.5526","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"},"aliases":[{"alias_kind":"arxiv","alias_value":"0912.5526","created_at":"2026-05-18T04:38:48.553385+00:00"},{"alias_kind":"arxiv_version","alias_value":"0912.5526v2","created_at":"2026-05-18T04:38:48.553385+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0912.5526","created_at":"2026-05-18T04:38:48.553385+00:00"},{"alias_kind":"pith_short_12","alias_value":"LG4VEHAQW2W3","created_at":"2026-05-18T12:26:00.592388+00:00"},{"alias_kind":"pith_short_16","alias_value":"LG4VEHAQW2W37B3L","created_at":"2026-05-18T12:26:00.592388+00:00"},{"alias_kind":"pith_short_8","alias_value":"LG4VEHAQ","created_at":"2026-05-18T12:26:00.592388+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/LG4VEHAQW2W37B3LDLQSBF6OGM","json":"https://pith.science/pith/LG4VEHAQW2W37B3LDLQSBF6OGM.json","graph_json":"https://pith.science/api/pith-number/LG4VEHAQW2W37B3LDLQSBF6OGM/graph.json","events_json":"https://pith.science/api/pith-number/LG4VEHAQW2W37B3LDLQSBF6OGM/events.json","paper":"https://pith.science/paper/LG4VEHAQ"},"agent_actions":{"view_html":"https://pith.science/pith/LG4VEHAQW2W37B3LDLQSBF6OGM","download_json":"https://pith.science/pith/LG4VEHAQW2W37B3LDLQSBF6OGM.json","view_paper":"https://pith.science/paper/LG4VEHAQ","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=0912.5526&json=true","fetch_graph":"https://pith.science/api/pith-number/LG4VEHAQW2W37B3LDLQSBF6OGM/graph.json","fetch_events":"https://pith.science/api/pith-number/LG4VEHAQW2W37B3LDLQSBF6OGM/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/LG4VEHAQW2W37B3LDLQSBF6OGM/action/timestamp_anchor","attest_storage":"https://pith.science/pith/LG4VEHAQW2W37B3LDLQSBF6OGM/action/storage_attestation","attest_author":"https://pith.science/pith/LG4VEHAQW2W37B3LDLQSBF6OGM/action/author_attestation","sign_citation":"https://pith.science/pith/LG4VEHAQW2W37B3LDLQSBF6OGM/action/citation_signature","submit_replication":"https://pith.science/pith/LG4VEHAQW2W37B3LDLQSBF6OGM/action/replication_record"}},"created_at":"2026-05-18T04:38:48.553385+00:00","updated_at":"2026-05-18T04:38:48.553385+00:00"}