{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:XCECAXJNOE7OPCLMBH2ULQ3KRT","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":"3a48d9ee43d95f7e026a012d7511a133d245910e26500586bc2da57aa9b93172","cross_cats_sorted":["nucl-ex"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ex","submitted_at":"2016-11-15T08:37:26Z","title_canon_sha256":"69ed435faaa50c97e340d5b995fc42221933a25c3025bb26691b658045a867c5"},"schema_version":"1.0","source":{"id":"1611.04739","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1611.04739","created_at":"2026-05-18T00:50:28Z"},{"alias_kind":"arxiv_version","alias_value":"1611.04739v2","created_at":"2026-05-18T00:50:28Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1611.04739","created_at":"2026-05-18T00:50:28Z"},{"alias_kind":"pith_short_12","alias_value":"XCECAXJNOE7O","created_at":"2026-05-18T12:30:51Z"},{"alias_kind":"pith_short_16","alias_value":"XCECAXJNOE7OPCLM","created_at":"2026-05-18T12:30:51Z"},{"alias_kind":"pith_short_8","alias_value":"XCECAXJN","created_at":"2026-05-18T12:30:51Z"}],"graph_snapshots":[{"event_id":"sha256:0d1028caa840853746650891013d4c2b1e88df4a8131d34d45cab9a20eba1466","target":"graph","created_at":"2026-05-18T00:50:28Z","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 Dalitz decay pi^0 -> e^+e^-gamma has been measured in the gamma p -> pi^0 p reaction with the A2 tagged-photon facility at the Mainz Microtron, MAMI. The value obtained for the slope parameter of the pi^0 electromagnetic transition form factor, a_pi = 0.030+/-0.010_tot, is in agreement with existing measurements of this decay and with recent theoretical calculations. The uncertainty obtained in the value of a_pi is lower than in previous results based on the pi^0 -> e^+e^-gamma decay.","authors_text":"A. Braghieri, A. Denig, A. K\\\"aser, A. Lazarev, A. Mushkarenkov, A. Neganov, A. Neiser, A. Nikolaev, A. Polonski, A. Rajabi, A. Thiel, A. Thomas, B. Krusche, B. Strandberg, C. Collicott, C. Mullen, C. S. Akondi, C. Sfienti, D. Glowa, D. G. Middleton, D. Hornidge, D. I. Glazier, D. J. Hamilton, D. M. Manley, D. Paudyal, D. P. Watts, D. Werthm\\\"uller, E. F. McNicoll, E. J. Downie, E. Mornacchi, F. Afzal, F. Cividini, G. M. Gurevich, G. M. Huber, G. Ron, G. Rosner, H. Bergh\\\"auser, H. J. Arends, I. I. Strakovsky, I. J. D. MacGregor, I. Keshelashvili, I. Supek, J. C. McGeorge, J. Linturi, J. R. M. Annand, J. Robinson, J. Wettig, K. Bantawa, K. Livingston, K. Spieker, L. A. Zana, L. V. Fil'kov, L. Witthauer, M. Biroth, M. Dieterle, M. H. Sikora, M. I. Ferretti Bondy, M. Korolija, M. Martemianov, M. Oberle, M. Ostrick, M. Thiel, M. Unverzagt, M. Wolfes, N. S. Borisov, N. Walford, O. Steffen, P. Adlarson, P. Aguar-Bartolom\\'e, P. B. Otte, P. Drexler, P. Ott, P. Pedroni, P. P. Martel, R. Beck, R. Kondratiev, R. MacRae, R. Miskimen, S. Cherepnya, S. Costanza, S. Gardner, S. Garni, S. Kay, S. Prakhov, S. Wagner, T. C. Jude, Th. Strub, T. Rostomyan, V. Lisin, V. L. Kashevarov, V. Metag, V. Sokhoyan, V. V. Kulikov, W. Gradl, W. J. Briscoe, Yu. A. Usov, Z. Ahmed","cross_cats":["nucl-ex"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ex","submitted_at":"2016-11-15T08:37:26Z","title":"Measurement of the pi^0 -> e^+e^-gamma Dalitz decay at the Mainz Microtron"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1611.04739","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":"sha256:940bc0a37cb4c058f92dffc09e74efa07aec1d2f95cb21136d76197dff777d53","target":"record","created_at":"2026-05-18T00:50:28Z","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":"3a48d9ee43d95f7e026a012d7511a133d245910e26500586bc2da57aa9b93172","cross_cats_sorted":["nucl-ex"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ex","submitted_at":"2016-11-15T08:37:26Z","title_canon_sha256":"69ed435faaa50c97e340d5b995fc42221933a25c3025bb26691b658045a867c5"},"schema_version":"1.0","source":{"id":"1611.04739","kind":"arxiv","version":2}},"canonical_sha256":"b888205d2d713ee7896c09f545c36a8cee4e3a89e0ddd338eddab6c667b288ee","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b888205d2d713ee7896c09f545c36a8cee4e3a89e0ddd338eddab6c667b288ee","first_computed_at":"2026-05-18T00:50:28.923822Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:50:28.923822Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Z5yBW0G2fi0WzyyJhMtlN3jkftPRksEm7GGN+Mk9fJuETd/gIlze+5tnkChH/6iFGotgXxqm+vcniNIHuvRDDg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:50:28.924508Z","signed_message":"canonical_sha256_bytes"},"source_id":"1611.04739","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:940bc0a37cb4c058f92dffc09e74efa07aec1d2f95cb21136d76197dff777d53","sha256:0d1028caa840853746650891013d4c2b1e88df4a8131d34d45cab9a20eba1466"],"state_sha256":"1ed229b097ad46db384e71204a35aa273b83baba04573ddc5e08b0c1728f7ed8"}