{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2022:UE7O4DNBOZLLSTXA5WV2WPZHKT","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":"88591956a00cc47ad3f368376979599a7c4c8742c3c508ab2b1f8a4596ae959c","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"hep-ph","submitted_at":"2022-05-10T01:22:13Z","title_canon_sha256":"6ac790d72e59ee0896fffb38086d3434fc7aadc084b95a49abf034acfe932897"},"schema_version":"1.0","source":{"id":"2205.04614","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2205.04614","created_at":"2026-07-05T04:27:59Z"},{"alias_kind":"arxiv_version","alias_value":"2205.04614v1","created_at":"2026-07-05T04:27:59Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2205.04614","created_at":"2026-07-05T04:27:59Z"},{"alias_kind":"pith_short_12","alias_value":"UE7O4DNBOZLL","created_at":"2026-07-05T04:27:59Z"},{"alias_kind":"pith_short_16","alias_value":"UE7O4DNBOZLLSTXA","created_at":"2026-07-05T04:27:59Z"},{"alias_kind":"pith_short_8","alias_value":"UE7O4DNB","created_at":"2026-07-05T04:27:59Z"}],"graph_snapshots":[{"event_id":"sha256:e5c9dffd5405af9b618c8c007c8293ac273435a516d670deb70a2fdfaae3bded","target":"graph","created_at":"2026-07-05T04:27:59Z","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/2205.04614/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We systematically investigate the speed of sound in QCD matter under different conditions in the grand canonical ensemble within the Polyakov loop improved Nambu--Jona-Lasinio (PNJL) model. The numerical results indicate that the dependence of speed of sound on parameters like temperature and chemical potential can be indicative of QCD phase transition. Some new features of speed of sound are discovered, for instance, the hierarchy of sound velocity for $u(d)$ and $s$ quark at low temperature with the increasing chemical potential and the squared sound velocity approaching to almost zero in th","authors_text":"Chong-long Xie, Guo-yun Shao, Wei-bo He, Xin-ran Yang, Xue-yan Gao","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"hep-ph","submitted_at":"2022-05-10T01:22:13Z","title":"Speed of sound in QCD matter"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2205.04614","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":"sha256:2599087a50488b475b8c5eb3cb7aa813eb2d1c133251e7cd5cd2ab0f05418f2f","target":"record","created_at":"2026-07-05T04:27:59Z","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":"88591956a00cc47ad3f368376979599a7c4c8742c3c508ab2b1f8a4596ae959c","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"hep-ph","submitted_at":"2022-05-10T01:22:13Z","title_canon_sha256":"6ac790d72e59ee0896fffb38086d3434fc7aadc084b95a49abf034acfe932897"},"schema_version":"1.0","source":{"id":"2205.04614","kind":"arxiv","version":1}},"canonical_sha256":"a13eee0da17656b94ee0edabab3f2754d83848e44d3a99df76fbc4de4241e2e3","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a13eee0da17656b94ee0edabab3f2754d83848e44d3a99df76fbc4de4241e2e3","first_computed_at":"2026-07-05T04:27:59.439859Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T04:27:59.439859Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"1NVrK2kvPYgratDAsVVkWQPRewQm1E1jOjPUHCT7F6DUAZ40bxNieNl3aovfC8nga7vXVqgvpwh/pYUhz0M+Bw==","signature_status":"signed_v1","signed_at":"2026-07-05T04:27:59.440215Z","signed_message":"canonical_sha256_bytes"},"source_id":"2205.04614","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:2599087a50488b475b8c5eb3cb7aa813eb2d1c133251e7cd5cd2ab0f05418f2f","sha256:e5c9dffd5405af9b618c8c007c8293ac273435a516d670deb70a2fdfaae3bded"],"state_sha256":"b5a2caddf7dd2786a7894cf2c3399ca7f85f723f0369783d547eeced9425d61e"}