{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:SHZWWHWU7KZHROFMKT6YO6ZYCO","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":"85f0faaef6815a82fe91a101cf3607cc3c09cd65d649f795e2cb3aed46bbde18","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2011-05-09T10:49:05Z","title_canon_sha256":"675e5a0d8926d3df9e5df35e1666c5100d491ccc2d6343f301b923f85da4d65f"},"schema_version":"1.0","source":{"id":"1105.1626","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1105.1626","created_at":"2026-05-18T04:12:33Z"},{"alias_kind":"arxiv_version","alias_value":"1105.1626v2","created_at":"2026-05-18T04:12:33Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1105.1626","created_at":"2026-05-18T04:12:33Z"},{"alias_kind":"pith_short_12","alias_value":"SHZWWHWU7KZH","created_at":"2026-05-18T12:26:41Z"},{"alias_kind":"pith_short_16","alias_value":"SHZWWHWU7KZHROFM","created_at":"2026-05-18T12:26:41Z"},{"alias_kind":"pith_short_8","alias_value":"SHZWWHWU","created_at":"2026-05-18T12:26:41Z"}],"graph_snapshots":[{"event_id":"sha256:c34dd768721a8eaf0bd52db20c87e442d258e0f6c594f1b007d4186597fdf7bd","target":"graph","created_at":"2026-05-18T04:12:33Z","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"},"paper":{"abstract_excerpt":"The central exclusive production (CEP) of heavy resonance states that subsequently decay into meson pairs, MMbar, is an important signature for such processes at hadron colliders. However there is a potentially important background from the direct QCD production of meson pairs, as mediated for example by the exclusive gg --> MMbar hard scattering subprocess. This is in fact an interesting process in its own right, testing novel aspects of perturbative QCD technology. We explicitly calculate the gg --> MMbar helicity amplitudes for different meson states within the hard exclusive formalism, and","authors_text":"L.A. Harland-Lang, M.G. Ryskin, V.A. Khoze, W.J. Stirling","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2011-05-09T10:49:05Z","title":"Central exclusive meson pair production in the perturbative regime at hadron colliders"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1105.1626","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:a9682d7b5c59ddfc8264ab36bcacb07f93678b6819e8926b50c874142619c1db","target":"record","created_at":"2026-05-18T04:12:33Z","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":"85f0faaef6815a82fe91a101cf3607cc3c09cd65d649f795e2cb3aed46bbde18","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2011-05-09T10:49:05Z","title_canon_sha256":"675e5a0d8926d3df9e5df35e1666c5100d491ccc2d6343f301b923f85da4d65f"},"schema_version":"1.0","source":{"id":"1105.1626","kind":"arxiv","version":2}},"canonical_sha256":"91f36b1ed4fab278b8ac54fd877b3813ab1529b1cacba144f30eb16c0ddbff36","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"91f36b1ed4fab278b8ac54fd877b3813ab1529b1cacba144f30eb16c0ddbff36","first_computed_at":"2026-05-18T04:12:33.706953Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:12:33.706953Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"ZTG+5Dt/O6mYQBgnEfN3jDW8RhbSKSxbsjpAlfBooz5mMYuvBQlsUNqCWJTcrAVva3sAcMkSRIylhv8hwzCQAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T04:12:33.707623Z","signed_message":"canonical_sha256_bytes"},"source_id":"1105.1626","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a9682d7b5c59ddfc8264ab36bcacb07f93678b6819e8926b50c874142619c1db","sha256:c34dd768721a8eaf0bd52db20c87e442d258e0f6c594f1b007d4186597fdf7bd"],"state_sha256":"123e925411dd7e68887ab1987c8e12ccc33367c098684a3c22ff5b6c4ece9595"}