{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2021:NB3XARBGQE7LWGAVDISYDI6BJK","short_pith_number":"pith:NB3XARBG","schema_version":"1.0","canonical_sha256":"6877704426813ebb18151a2581a3c14abbf1f754e0b52fb46c9baf2c89d56457","source":{"kind":"arxiv","id":"2111.01388","version":2},"attestation_state":"computed","paper":{"title":"The $\\eta$- and $\\eta'$-nucleus interactions and the search for $\\eta$, $\\eta'$- mesic states","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["nucl-ex","nucl-th"],"primary_cat":"hep-ph","authors_text":"Pawel Moskal, Steven D. Bass, Volker Metag","submitted_at":"2021-11-02T06:10:24Z","abstract_excerpt":"The isoscalar $\\eta$ and $\\eta'$ mesons are special in QCD, being linked both to chiral symmetry and to non-perturbative glue associated with the axial anomaly. The properties of these mesons in medium are sensitive to how these dynamics work in the nuclear environment. In contrast to pionic and kaonic atoms which are mainly bound by the Coulomb interaction with some corrections due to the strong force (Coulomb assisted binding), the $\\eta$ and $\\eta'$ as neutral mesons can only be bound by the strong interaction. Is this interaction strong enough? This topic has inspired a vigorous program of"},"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":"2111.01388","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2021-11-02T06:10:24Z","cross_cats_sorted":["nucl-ex","nucl-th"],"title_canon_sha256":"50cb82977d9d709d5807f39eed230a41b70e26e54f486184e305ef8a13a56a7b","abstract_canon_sha256":"7fb65d8419b49ad3e94d9bad4f12e57b0b7f6aefe9d235dee1c939c00190a4bc"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T05:15:36.090847Z","signature_b64":"EoIjVnvEiMN/MRNHC4iKLE41oirWunD69MarTs55Q0XqtUjRhIhFiWFvBxmAtZd4Ko7DfSBxW6qfJTTytK6GBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"6877704426813ebb18151a2581a3c14abbf1f754e0b52fb46c9baf2c89d56457","last_reissued_at":"2026-07-05T05:15:36.090400Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T05:15:36.090400Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"The $\\eta$- and $\\eta'$-nucleus interactions and the search for $\\eta$, $\\eta'$- mesic states","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["nucl-ex","nucl-th"],"primary_cat":"hep-ph","authors_text":"Pawel Moskal, Steven D. Bass, Volker Metag","submitted_at":"2021-11-02T06:10:24Z","abstract_excerpt":"The isoscalar $\\eta$ and $\\eta'$ mesons are special in QCD, being linked both to chiral symmetry and to non-perturbative glue associated with the axial anomaly. The properties of these mesons in medium are sensitive to how these dynamics work in the nuclear environment. In contrast to pionic and kaonic atoms which are mainly bound by the Coulomb interaction with some corrections due to the strong force (Coulomb assisted binding), the $\\eta$ and $\\eta'$ as neutral mesons can only be bound by the strong interaction. Is this interaction strong enough? This topic has inspired a vigorous program of"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2111.01388","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2111.01388/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2111.01388","created_at":"2026-07-05T05:15:36.090474+00:00"},{"alias_kind":"arxiv_version","alias_value":"2111.01388v2","created_at":"2026-07-05T05:15:36.090474+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2111.01388","created_at":"2026-07-05T05:15:36.090474+00:00"},{"alias_kind":"pith_short_12","alias_value":"NB3XARBGQE7L","created_at":"2026-07-05T05:15:36.090474+00:00"},{"alias_kind":"pith_short_16","alias_value":"NB3XARBGQE7LWGAV","created_at":"2026-07-05T05:15:36.090474+00:00"},{"alias_kind":"pith_short_8","alias_value":"NB3XARBG","created_at":"2026-07-05T05:15:36.090474+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":1,"internal_anchor_count":1,"sample":[{"citing_arxiv_id":"2411.16597","citing_title":"Gluons in the $\\eta'$ and in nucleon resonances","ref_index":17,"is_internal_anchor":true}]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/NB3XARBGQE7LWGAVDISYDI6BJK","json":"https://pith.science/pith/NB3XARBGQE7LWGAVDISYDI6BJK.json","graph_json":"https://pith.science/api/pith-number/NB3XARBGQE7LWGAVDISYDI6BJK/graph.json","events_json":"https://pith.science/api/pith-number/NB3XARBGQE7LWGAVDISYDI6BJK/events.json","paper":"https://pith.science/paper/NB3XARBG"},"agent_actions":{"view_html":"https://pith.science/pith/NB3XARBGQE7LWGAVDISYDI6BJK","download_json":"https://pith.science/pith/NB3XARBGQE7LWGAVDISYDI6BJK.json","view_paper":"https://pith.science/paper/NB3XARBG","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2111.01388&json=true","fetch_graph":"https://pith.science/api/pith-number/NB3XARBGQE7LWGAVDISYDI6BJK/graph.json","fetch_events":"https://pith.science/api/pith-number/NB3XARBGQE7LWGAVDISYDI6BJK/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/NB3XARBGQE7LWGAVDISYDI6BJK/action/timestamp_anchor","attest_storage":"https://pith.science/pith/NB3XARBGQE7LWGAVDISYDI6BJK/action/storage_attestation","attest_author":"https://pith.science/pith/NB3XARBGQE7LWGAVDISYDI6BJK/action/author_attestation","sign_citation":"https://pith.science/pith/NB3XARBGQE7LWGAVDISYDI6BJK/action/citation_signature","submit_replication":"https://pith.science/pith/NB3XARBGQE7LWGAVDISYDI6BJK/action/replication_record"}},"created_at":"2026-07-05T05:15:36.090474+00:00","updated_at":"2026-07-05T05:15:36.090474+00:00"}