{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:XYSFTBTCRQD6NAPDAM43XGDMBG","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":"9dd677c0be015d9f6a4553cd0344da8a708cf73b5ff3cbfb4860fd173c8d9871","cross_cats_sorted":["hep-ph"],"license":"http://creativecommons.org/publicdomain/zero/1.0/","primary_cat":"hep-ex","submitted_at":"2025-08-28T11:20:00Z","title_canon_sha256":"2eeaec7d7d69e7b2deac332063ed0178d0f6469fbacab6770ed867376e290f0c"},"schema_version":"1.0","source":{"id":"2508.20667","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2508.20667","created_at":"2026-07-05T12:00:57Z"},{"alias_kind":"arxiv_version","alias_value":"2508.20667v1","created_at":"2026-07-05T12:00:57Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2508.20667","created_at":"2026-07-05T12:00:57Z"},{"alias_kind":"pith_short_12","alias_value":"XYSFTBTCRQD6","created_at":"2026-07-05T12:00:57Z"},{"alias_kind":"pith_short_16","alias_value":"XYSFTBTCRQD6NAPD","created_at":"2026-07-05T12:00:57Z"},{"alias_kind":"pith_short_8","alias_value":"XYSFTBTC","created_at":"2026-07-05T12:00:57Z"}],"graph_snapshots":[{"event_id":"sha256:9af1e70013f351f962ece93feba3dd26459a03fb8654a4c45958bd97c326e1c8","target":"graph","created_at":"2026-07-05T12:00:57Z","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/2508.20667/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We give a pedagogical introduction to heavy quarkonia -- bound states of a heavy quark and its antiquark (e.g., charmonium $c\\bar{c}$, bottomonium $b\\bar{b}$) -- as well as to the exotic hadrons containing two heavy quarks that have been discovered since 2003. The review covers the foundational discoveries ($J/\\psi$ and $\\Upsilon$), basic properties, spectroscopy interpreted via potential models, production mechanisms at colliders, and decay modes. A significant focus is placed on the so-called ``$XYZ$\" states -- particles like the $X(3872)$, $Y(4260/4230)$, $Z_c(3900)$, and $P_c$ -- whose pro","authors_text":"Chang-Zheng Yuan, Yuping Guo","cross_cats":["hep-ph"],"headline":"","license":"http://creativecommons.org/publicdomain/zero/1.0/","primary_cat":"hep-ex","submitted_at":"2025-08-28T11:20:00Z","title":"Heavy quarkonia and new hadrons with two heavy quarks"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2508.20667","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":"sha256:0cac1138f55966235d62a48850140ac42cef64280d98eff6de760a9aa893db54","target":"record","created_at":"2026-07-05T12:00:57Z","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":"9dd677c0be015d9f6a4553cd0344da8a708cf73b5ff3cbfb4860fd173c8d9871","cross_cats_sorted":["hep-ph"],"license":"http://creativecommons.org/publicdomain/zero/1.0/","primary_cat":"hep-ex","submitted_at":"2025-08-28T11:20:00Z","title_canon_sha256":"2eeaec7d7d69e7b2deac332063ed0178d0f6469fbacab6770ed867376e290f0c"},"schema_version":"1.0","source":{"id":"2508.20667","kind":"arxiv","version":1}},"canonical_sha256":"be245986628c07e681e30339bb986c098b41afcc07b34bf84aef4a5e2beea40a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"be245986628c07e681e30339bb986c098b41afcc07b34bf84aef4a5e2beea40a","first_computed_at":"2026-07-05T12:00:57.374437Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T12:00:57.374437Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"9f1491j/67MDEWymFpwWTc5ivLSYCsuuWpfgLNbbnEje4uySiLlwGuiVI3AIWhd8/w/KJgakJoOIfj9BMuelCA==","signature_status":"signed_v1","signed_at":"2026-07-05T12:00:57.374859Z","signed_message":"canonical_sha256_bytes"},"source_id":"2508.20667","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:0cac1138f55966235d62a48850140ac42cef64280d98eff6de760a9aa893db54","sha256:9af1e70013f351f962ece93feba3dd26459a03fb8654a4c45958bd97c326e1c8"],"state_sha256":"4a563a532295d9c1f4a631303e71369c3424c4fdf995924057799b742f2cfd74"}