{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:6ADRI5TC6PTHGGLMBTUTU26JE2","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":"1990825096e522d7cd37740c02359f1c9d747401e5ab09a97161b99c19bfed2b","cross_cats_sorted":["hep-ex","nucl-ex","nucl-th"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2021-11-26T13:52:27Z","title_canon_sha256":"63fe974187409f42290b07983650aebdcc03192918ef3ca82758e14a3168f65c"},"schema_version":"1.0","source":{"id":"2111.13496","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2111.13496","created_at":"2026-07-05T04:00:20Z"},{"alias_kind":"arxiv_version","alias_value":"2111.13496v2","created_at":"2026-07-05T04:00:20Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2111.13496","created_at":"2026-07-05T04:00:20Z"},{"alias_kind":"pith_short_12","alias_value":"6ADRI5TC6PTH","created_at":"2026-07-05T04:00:20Z"},{"alias_kind":"pith_short_16","alias_value":"6ADRI5TC6PTHGGLM","created_at":"2026-07-05T04:00:20Z"},{"alias_kind":"pith_short_8","alias_value":"6ADRI5TC","created_at":"2026-07-05T04:00:20Z"}],"graph_snapshots":[{"event_id":"sha256:ecfbe7640d9fe64a529f6f3cedd823a05943872d751ae83681185a1ff7742010","target":"graph","created_at":"2026-07-05T04:00:20Z","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/2111.13496/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"There must be Coulomb bound states of a pair of hadrons, which are stable against the strong interaction, with opposite electric charges. Such bound states are hadronic atoms. We study the properties and the production of the ground-state $D^+D^-$ hadronic atom $A_{D^+D^-}$, called dionium, with quantum numbers $J^{PC}=0^{++}$. Using a nonrelativistic effective field theory for the $D^0\\bar{D}^0$-$D^+D^-$ coupled-channel system, the mass of the ground-state dionium is predicted to be $(3739.3 \\pm 0.1)~\\text{MeV}$, with the binding energy reduced by about 10% compared to the Coulomb binding ene","authors_text":"Feng-Kun Guo, Pan-Pan Shi, Zhen-Hua Zhang, Zhi Yang","cross_cats":["hep-ex","nucl-ex","nucl-th"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2021-11-26T13:52:27Z","title":"$D^+D^-$ hadronic atom and its production in $pp$ and $p\\bar{p}$ collisions"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2111.13496","kind":"arxiv","version":2},"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:a65b23c760142fc5ee285b5814bd4a872b5d2316898f97e45324d5365ab43e83","target":"record","created_at":"2026-07-05T04:00:20Z","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":"1990825096e522d7cd37740c02359f1c9d747401e5ab09a97161b99c19bfed2b","cross_cats_sorted":["hep-ex","nucl-ex","nucl-th"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2021-11-26T13:52:27Z","title_canon_sha256":"63fe974187409f42290b07983650aebdcc03192918ef3ca82758e14a3168f65c"},"schema_version":"1.0","source":{"id":"2111.13496","kind":"arxiv","version":2}},"canonical_sha256":"f007147662f3e673196c0ce93a6bc92682a65238b5d1251566bc0df93f227a52","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f007147662f3e673196c0ce93a6bc92682a65238b5d1251566bc0df93f227a52","first_computed_at":"2026-07-05T04:00:20.290898Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T04:00:20.290898Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"83r0aDfVeyOSksg5S2gPSRT0aGVIiuE1tMDQOp/9CiKuW5uUKm7KN5QVBq/X8EWak/R+qwMR1UirBfBpAYTMAg==","signature_status":"signed_v1","signed_at":"2026-07-05T04:00:20.291311Z","signed_message":"canonical_sha256_bytes"},"source_id":"2111.13496","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a65b23c760142fc5ee285b5814bd4a872b5d2316898f97e45324d5365ab43e83","sha256:ecfbe7640d9fe64a529f6f3cedd823a05943872d751ae83681185a1ff7742010"],"state_sha256":"3ed3a596e4d5c408edf6950b5328cfe0f872ffb06f7037aabb9a2ca92f2f277f"}