{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:WNAFWMSFGMUX74AVZQJPGJTTWM","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":"c8c82ba566d8cc11905029051d7a6d3666eb714952d4ab3e3e4fb01d186e717d","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-ex","submitted_at":"2013-06-13T06:17:25Z","title_canon_sha256":"816ac6054b89b4449f1ecdcc9c55b4e4dacbf5eb3f404ee1e22b2d5569dab4bb"},"schema_version":"1.0","source":{"id":"1306.3031","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1306.3031","created_at":"2026-05-18T02:30:16Z"},{"alias_kind":"arxiv_version","alias_value":"1306.3031v1","created_at":"2026-05-18T02:30:16Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1306.3031","created_at":"2026-05-18T02:30:16Z"},{"alias_kind":"pith_short_12","alias_value":"WNAFWMSFGMUX","created_at":"2026-05-18T12:28:04Z"},{"alias_kind":"pith_short_16","alias_value":"WNAFWMSFGMUX74AV","created_at":"2026-05-18T12:28:04Z"},{"alias_kind":"pith_short_8","alias_value":"WNAFWMSF","created_at":"2026-05-18T12:28:04Z"}],"graph_snapshots":[{"event_id":"sha256:54589dc17d1cf7d27bef34a4713f3aa2d6f9fb8a762856ebf78ea2345841ef68","target":"graph","created_at":"2026-05-18T02:30:16Z","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":"We report the measurement of differential cross sections for $\\omega$ and $\\eta'$ photoproduction from protons at backward angles ($-1.0<\\cos\\Theta_{C.M}^{X}<-0.8$) using linearly polarized photons at $E_{\\gamma}=$$1.5-3.0$ GeV. Differential cross sections for $\\omega$ mesons are larger than the predicted $u$-channel contribution in the energy range $2.0\\leq\\sqrt{s}\\leq2.4$ GeV. The differential cross sections for $\\omega$ and $\\eta'$ mesons become closer to the predicted $u$-channel contribution at $\\sqrt{s}>2.4$ GeV. A bump structure in the $\\sqrt{s}$ dependence of the differential cross sec","authors_text":"A.Tokiyasu, C.Rangacharyulus, D.S.Ahn, E.A.Strokovsky, H.Fujimura, H.Kawai, H.Kohri, H.Noumi, H.Shimizu, J.D.Parker, J.K.Ahn, J.Y.Chen, K.Hicks, K.Imai, K.Mase, K.Suzuki, K.Tanida, M.J.Kim, M.Miyabe, M.Niiyama, M.Oka, M.Sumihama, M.Uchida, M.Yosoi, N.Muramatsu, P.J.Lin, R.Yamamura, S.Ajimura, S.Date, S.Fukui, S.H.Hwang, S.Y.Ryu, T.Hiraiwa, T.Hotta, T.Ishikawa, T.Nakano, T.Ohta, T.Saito, T.Sawada, T.Tomioka, T.Tsunemi, T.Yorita, W.C.Chang, Y.Kato, Y.Kon, Y.Maeda, Y.Morino, Y.Nakatsugawa, Y.Ohashi, Y.Sugaya","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-ex","submitted_at":"2013-06-13T06:17:25Z","title":"Backward-angle photoproduction of $\\omega$ and $\\eta'$ mesons from protons at $E_{\\gamma}=1.5-3.0$ GeV"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1306.3031","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":"sha256:4fc487dfcdf32e28e65088f97f1b8146a842bc05d6be0fe4b8aaa42681e49361","target":"record","created_at":"2026-05-18T02:30:16Z","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":"c8c82ba566d8cc11905029051d7a6d3666eb714952d4ab3e3e4fb01d186e717d","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-ex","submitted_at":"2013-06-13T06:17:25Z","title_canon_sha256":"816ac6054b89b4449f1ecdcc9c55b4e4dacbf5eb3f404ee1e22b2d5569dab4bb"},"schema_version":"1.0","source":{"id":"1306.3031","kind":"arxiv","version":1}},"canonical_sha256":"b3405b324533297ff015cc12f32673b3104dbc3414ea1ee5d75e6d3c590f537e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b3405b324533297ff015cc12f32673b3104dbc3414ea1ee5d75e6d3c590f537e","first_computed_at":"2026-05-18T02:30:16.457019Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:30:16.457019Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"TiI3CL4cs0PXFb4UFJkvxCECaGJvmWt7KEQVilqOtyP7zasaTsmVHn7DalJIRw/m1S0sDlA2+YLO1AsmvRWhBw==","signature_status":"signed_v1","signed_at":"2026-05-18T02:30:16.457583Z","signed_message":"canonical_sha256_bytes"},"source_id":"1306.3031","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:4fc487dfcdf32e28e65088f97f1b8146a842bc05d6be0fe4b8aaa42681e49361","sha256:54589dc17d1cf7d27bef34a4713f3aa2d6f9fb8a762856ebf78ea2345841ef68"],"state_sha256":"aa78f8563a31b56b7667570b426811a2c1db14900e44cdb5e6478018d9ff4c44"}