{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:XAFQW5LUCOZ2WG75KOLP6SNVSF","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":"0b13ee3a8ea840c0fd21571342e6f85e7b707adfed6d5f4c0a3cccb247980f0f","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"nucl-ex","submitted_at":"2019-09-04T18:09:50Z","title_canon_sha256":"64b720eef0172d522f069f0fe5babe724defaebd9e2ad1a37a545c22e556a2a1"},"schema_version":"1.0","source":{"id":"1909.02032","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1909.02032","created_at":"2026-07-05T01:38:55Z"},{"alias_kind":"arxiv_version","alias_value":"1909.02032v3","created_at":"2026-07-05T01:38:55Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1909.02032","created_at":"2026-07-05T01:38:55Z"},{"alias_kind":"pith_short_12","alias_value":"XAFQW5LUCOZ2","created_at":"2026-07-05T01:38:55Z"},{"alias_kind":"pith_short_16","alias_value":"XAFQW5LUCOZ2WG75","created_at":"2026-07-05T01:38:55Z"},{"alias_kind":"pith_short_8","alias_value":"XAFQW5LU","created_at":"2026-07-05T01:38:55Z"}],"graph_snapshots":[{"event_id":"sha256:769718f21e729ed64e727deda4bd084ba15ff5968d0ebdcc9db47015f07cab42","target":"graph","created_at":"2026-07-05T01:38:55Z","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/1909.02032/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The Compton double-polarization observable $\\Sigma_{2z}$ has been measured for the first time in the $\\Delta(1232)$ resonance region using a circularly polarized photon beam incident on a longitudinally polarized target at the Mainz Microtron. This paper reports these results, together with the model-dependent extraction of four proton spin polarizabilities from fits to additional asymmetry data using dispersion relation and chiral perturbation theory calculations, with the former resulting in: $\\gamma_{E1E1} = -3.18 \\pm 0.52$, $\\gamma_{M1M1} = 2.98 \\pm 0.43$, $\\gamma_{E1M2} = -0.44 \\pm 0.67$ ","authors_text":"A.B. Lazarev, A.B. Neganov, A. Braghieri, A. Denig, A. K\\\"aser, A. Mushkarenkov, A. Neiser, A. Polonski, A. Powell, A. Rajabi, A. Sarty, A. Thiel, A. Thomas, B. Krusche, C. Collicott, C. Mullen, C.S. Akondi, C. Sfienti, D. Glowa, D. Hamilton, D. Hornidge, D.I. Glazier, D.M. Manley, D. Paudyal, D.P. Watts, D. Werthm\\\"uller, E.J. Downie, E. Mornacchi, F. Afzal, F. Cividini, G.M. Gurevich, G.M. Huber, G. Reicherz, G. Ron, H.J. Arends, I. Gorodnov, I.I. Strakovsky, I.J.D. MacGregor, I. Keshelashvili, I. Supek, J. Mancell, J.M. Linturi, J.R.M. Annand, J. Wettig, K. Livingston, K. Spieker, L. Heijkenskj\\\"old, L. Witthauer, L. Zana (A2 Collaboration), M. Bashkanov, M. Biroth, M. Dieterle, M.H. Sikora, M.I. Ferretti-Bondy, M. Korolija, M. Oberle, M. Ostrick, M. Thiel, M. Unverzagt, M. Wolfes, N.K. Walford, N.S. Borisov, O. Steffen, P. Achenbach, P. Adlarson, P.B. Otte, P. Drexler, P. Pedroni, P.P. Martel, R. Beck, R. Kondratiev, R. MacRae, R. Miskimen, S. Abt, S. Costanza, S. Gardner, S. Garni, S. G\\\"unther, S. Kay, S. Lutterer, S.N. Prakhov, S. Wagner, Th. Strub, T. Rostomyan, V. Lisin, V.L. Kashevarov, V. Metag, V. Sokhoyan, W. Gradl, W.J. Briscoe, W. Meyer, Yu.A. Usov, Z. Ahmed","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"nucl-ex","submitted_at":"2019-09-04T18:09:50Z","title":"Spin polarizabilities of the proton by measurement of Compton double-polarization observables"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1909.02032","kind":"arxiv","version":3},"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":"sha256:70cea27990146a4fe62d307b5e9ffe31e4489b32b44d8a2687e712db17a12760","target":"record","created_at":"2026-07-05T01:38:55Z","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":"0b13ee3a8ea840c0fd21571342e6f85e7b707adfed6d5f4c0a3cccb247980f0f","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"nucl-ex","submitted_at":"2019-09-04T18:09:50Z","title_canon_sha256":"64b720eef0172d522f069f0fe5babe724defaebd9e2ad1a37a545c22e556a2a1"},"schema_version":"1.0","source":{"id":"1909.02032","kind":"arxiv","version":3}},"canonical_sha256":"b80b0b757413b3ab1bfd5396ff49b591516597b4046962111e93802adfa88cd5","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b80b0b757413b3ab1bfd5396ff49b591516597b4046962111e93802adfa88cd5","first_computed_at":"2026-07-05T01:38:55.934167Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T01:38:55.934167Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"nmyGwoXc6GEbMf15jGFHoiS2tAI3Jpd530wSwhda4vDzCkRm26P//AkLujJaEmYKez1zpSsDeLzdq/ZGdvX4DQ==","signature_status":"signed_v1","signed_at":"2026-07-05T01:38:55.934631Z","signed_message":"canonical_sha256_bytes"},"source_id":"1909.02032","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:70cea27990146a4fe62d307b5e9ffe31e4489b32b44d8a2687e712db17a12760","sha256:769718f21e729ed64e727deda4bd084ba15ff5968d0ebdcc9db47015f07cab42"],"state_sha256":"815212940651648494995d2c344b8260083c67018a8db504a8a2ff8aba67b1f0"}