{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:2LSBN35MWYEKDJUODDQDPQ4JGP","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":"0aba70d6a2e8ef6d8e9f061d0ac00ce5a05b6b63243d93438adf52e8c157945b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-ex","submitted_at":"2009-07-26T13:23:31Z","title_canon_sha256":"2152c564b544cab4f613f14b78afb8a5ad398b3e967b52fbbce7ea7fdb41e2dd"},"schema_version":"1.0","source":{"id":"0907.4478","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0907.4478","created_at":"2026-07-04T17:32:23Z"},{"alias_kind":"arxiv_version","alias_value":"0907.4478v2","created_at":"2026-07-04T17:32:23Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0907.4478","created_at":"2026-07-04T17:32:23Z"},{"alias_kind":"pith_short_12","alias_value":"2LSBN35MWYEK","created_at":"2026-07-04T17:32:23Z"},{"alias_kind":"pith_short_16","alias_value":"2LSBN35MWYEKDJUO","created_at":"2026-07-04T17:32:23Z"},{"alias_kind":"pith_short_8","alias_value":"2LSBN35M","created_at":"2026-07-04T17:32:23Z"}],"graph_snapshots":[{"event_id":"sha256:addaaa64055664e2c4a919e6830258fc636add083434ef0c4d348d5fe093cfc1","target":"graph","created_at":"2026-07-04T17:32:23Z","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/0907.4478/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The possibility of measuring the proton electromagnetic form factors in the time-like region at FAIR with the \\PANDA detector is discussed. Detailed simulations on signal efficiency for the annihilation of $\\bar p +p $ into a lepton pair as well as for the most important background channels have been performed. It is shown that precision measurements of the differential cross section of the reaction $\\bar p +p \\to e^++ e^-$ can be obtained in a wide angular and kinematical range. The individual determination of the moduli of the electric and magnetic proton form factors will be possible up to ","authors_text":"B. Kopf, B. Ramstein, D. Marchand, E. Becheva, E. Tomasi-Gustafsson, F. Maas, J. Boucher, J. van de Wiele, J. Zhong, M.C. Mora Espi, M. Pelizaeus, M. Steinke, M. Sudol, R. Kunne, S. Ong, T. Hennino, T. Zerguerras","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-ex","submitted_at":"2009-07-26T13:23:31Z","title":"Feasibility studies of the time-like proton electromagnetic form factor measurements with PANDA at FAIR"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0907.4478","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":"sha256:93074b54ce0f0c7551a219942fcfafc3879d776573bb1675e41d2baa80f2f063","target":"record","created_at":"2026-07-04T17:32:23Z","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":"0aba70d6a2e8ef6d8e9f061d0ac00ce5a05b6b63243d93438adf52e8c157945b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-ex","submitted_at":"2009-07-26T13:23:31Z","title_canon_sha256":"2152c564b544cab4f613f14b78afb8a5ad398b3e967b52fbbce7ea7fdb41e2dd"},"schema_version":"1.0","source":{"id":"0907.4478","kind":"arxiv","version":2}},"canonical_sha256":"d2e416efacb608a1a68e18e037c38933d7bd182cb43a1d487e89eb522b05813a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d2e416efacb608a1a68e18e037c38933d7bd182cb43a1d487e89eb522b05813a","first_computed_at":"2026-07-04T17:32:23.966854Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T17:32:23.966854Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Fa/gxQW7PcAGYzy0F515NUyZwUyWtJmGYztCsJwLdDncYGTL9psiBbJu6OMbotemO2rz7x/YxQU1GVsNmfbPBw==","signature_status":"signed_v1","signed_at":"2026-07-04T17:32:23.967269Z","signed_message":"canonical_sha256_bytes"},"source_id":"0907.4478","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:93074b54ce0f0c7551a219942fcfafc3879d776573bb1675e41d2baa80f2f063","sha256:addaaa64055664e2c4a919e6830258fc636add083434ef0c4d348d5fe093cfc1"],"state_sha256":"5b947f638ec09d352e70e4069fa9fe4f75f68e03459247a510914ecb84388488"}