{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:VC5WH4KPZB7T7P5MUO62Q4LOWJ","short_pith_number":"pith:VC5WH4KP","canonical_record":{"source":{"id":"1704.00649","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-ex","submitted_at":"2017-04-03T15:40:04Z","cross_cats_sorted":[],"title_canon_sha256":"00735f03ede5dbca2ee9fafaf6924c617095064a2bc0c45d12511552da9bf881","abstract_canon_sha256":"ef6d9fd5fc373c2e587c5ce2172ecfc5f2df85af1dbc2c4c15f9a24aee114a38"},"schema_version":"1.0"},"canonical_sha256":"a8bb63f14fc87f3fbfaca3bda8716eb2594ecb3b8fcb679b3990badfe7a0450b","source":{"kind":"arxiv","id":"1704.00649","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1704.00649","created_at":"2026-05-18T00:43:51Z"},{"alias_kind":"arxiv_version","alias_value":"1704.00649v1","created_at":"2026-05-18T00:43:51Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1704.00649","created_at":"2026-05-18T00:43:51Z"},{"alias_kind":"pith_short_12","alias_value":"VC5WH4KPZB7T","created_at":"2026-05-18T12:31:49Z"},{"alias_kind":"pith_short_16","alias_value":"VC5WH4KPZB7T7P5M","created_at":"2026-05-18T12:31:49Z"},{"alias_kind":"pith_short_8","alias_value":"VC5WH4KP","created_at":"2026-05-18T12:31:49Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:VC5WH4KPZB7T7P5MUO62Q4LOWJ","target":"record","payload":{"canonical_record":{"source":{"id":"1704.00649","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-ex","submitted_at":"2017-04-03T15:40:04Z","cross_cats_sorted":[],"title_canon_sha256":"00735f03ede5dbca2ee9fafaf6924c617095064a2bc0c45d12511552da9bf881","abstract_canon_sha256":"ef6d9fd5fc373c2e587c5ce2172ecfc5f2df85af1dbc2c4c15f9a24aee114a38"},"schema_version":"1.0"},"canonical_sha256":"a8bb63f14fc87f3fbfaca3bda8716eb2594ecb3b8fcb679b3990badfe7a0450b","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:43:51.014297Z","signature_b64":"OI34eXM2Pe9WUu58ly6Ui2H8TJXSZMigF6lhGET5I3jPCt/Yrbmj8CFAFfo/xWJh34vpFcKihgKu9B/4YXigBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a8bb63f14fc87f3fbfaca3bda8716eb2594ecb3b8fcb679b3990badfe7a0450b","last_reissued_at":"2026-05-18T00:43:51.013727Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:43:51.013727Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1704.00649","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:43:51Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"k6qYBfFTRXB92m3/vDTrRmWZlAgl4TCRx6/LT7JoTANCjHqgY+UlKLzn7JrqRKTjiqfdFvJUcw8miBgCQHj3CQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T04:30:26.347079Z"},"content_sha256":"f89d4947486c79bf9ba3d1256671de1dbaa23ac3aa388b472ef54b5a71a18acb","schema_version":"1.0","event_id":"sha256:f89d4947486c79bf9ba3d1256671de1dbaa23ac3aa388b472ef54b5a71a18acb"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:VC5WH4KPZB7T7P5MUO62Q4LOWJ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Helicity-dependent cross sections and double-polarization observable E in eta photoproduction from quasi-free protons and neutrons","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"nucl-ex","authors_text":"A.B. Lazarev, A.B. Neganov, A. Braghieri, A. Denig, A. K\\\"aser, A. Mushkarenkov, A. Neiser, A. Polonski, A. Rajabi, A. Sarty, A. Thiel, A. Thomas, B. Krusche, C. Collicott, 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.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. Witthauer, L. Zana, M. Bashkanov, M. Biroth, M. Dieterle, M. G\\\"unther, 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.B. Otte, P. Drexler, P. Pedroni, P.P. Martel, R. Beck, R. Kondratiev, R. Miskimen, S. Abt, S. Costanza, S. Gardner, S. Garni, 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","submitted_at":"2017-04-03T15:40:04Z","abstract_excerpt":"Precise helicity-dependent cross sections and the double-polarization observable $E$ were measured for $\\eta$ photoproduction from quasi-free protons and neutrons bound in the deuteron. The $\\eta\\rightarrow 2\\gamma$ and $\\eta\\rightarrow 3\\pi^0\\rightarrow 6\\gamma$ decay modes were used to optimize the statistical quality of the data and to estimate systematic uncertainties. The measurement used the A2 detector setup at the tagged photon beam of the electron accelerator MAMI in Mainz. A longitudinally polarized deuterated butanol target was used in combination with a circularly polarized photon "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1704.00649","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:43:51Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"6hIZkKnn1BsOk9xG634VbccZxJ8a1NADImxT7EczwkltbDyFVISike1xCsjmNHEsCPvrmr98PGsAYL3NLP3qDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T04:30:26.347479Z"},"content_sha256":"92f9750c7930c181b2ba492549be3b89ee87f09d36ee5e79060b947bdcd5eb1c","schema_version":"1.0","event_id":"sha256:92f9750c7930c181b2ba492549be3b89ee87f09d36ee5e79060b947bdcd5eb1c"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/VC5WH4KPZB7T7P5MUO62Q4LOWJ/bundle.json","state_url":"https://pith.science/pith/VC5WH4KPZB7T7P5MUO62Q4LOWJ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/VC5WH4KPZB7T7P5MUO62Q4LOWJ/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-06-03T04:30:26Z","links":{"resolver":"https://pith.science/pith/VC5WH4KPZB7T7P5MUO62Q4LOWJ","bundle":"https://pith.science/pith/VC5WH4KPZB7T7P5MUO62Q4LOWJ/bundle.json","state":"https://pith.science/pith/VC5WH4KPZB7T7P5MUO62Q4LOWJ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/VC5WH4KPZB7T7P5MUO62Q4LOWJ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:VC5WH4KPZB7T7P5MUO62Q4LOWJ","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":"ef6d9fd5fc373c2e587c5ce2172ecfc5f2df85af1dbc2c4c15f9a24aee114a38","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-ex","submitted_at":"2017-04-03T15:40:04Z","title_canon_sha256":"00735f03ede5dbca2ee9fafaf6924c617095064a2bc0c45d12511552da9bf881"},"schema_version":"1.0","source":{"id":"1704.00649","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1704.00649","created_at":"2026-05-18T00:43:51Z"},{"alias_kind":"arxiv_version","alias_value":"1704.00649v1","created_at":"2026-05-18T00:43:51Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1704.00649","created_at":"2026-05-18T00:43:51Z"},{"alias_kind":"pith_short_12","alias_value":"VC5WH4KPZB7T","created_at":"2026-05-18T12:31:49Z"},{"alias_kind":"pith_short_16","alias_value":"VC5WH4KPZB7T7P5M","created_at":"2026-05-18T12:31:49Z"},{"alias_kind":"pith_short_8","alias_value":"VC5WH4KP","created_at":"2026-05-18T12:31:49Z"}],"graph_snapshots":[{"event_id":"sha256:92f9750c7930c181b2ba492549be3b89ee87f09d36ee5e79060b947bdcd5eb1c","target":"graph","created_at":"2026-05-18T00:43:51Z","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":"Precise helicity-dependent cross sections and the double-polarization observable $E$ were measured for $\\eta$ photoproduction from quasi-free protons and neutrons bound in the deuteron. The $\\eta\\rightarrow 2\\gamma$ and $\\eta\\rightarrow 3\\pi^0\\rightarrow 6\\gamma$ decay modes were used to optimize the statistical quality of the data and to estimate systematic uncertainties. The measurement used the A2 detector setup at the tagged photon beam of the electron accelerator MAMI in Mainz. A longitudinally polarized deuterated butanol target was used in combination with a circularly polarized photon ","authors_text":"A.B. Lazarev, A.B. Neganov, A. Braghieri, A. Denig, A. K\\\"aser, A. Mushkarenkov, A. Neiser, A. Polonski, A. Rajabi, A. Sarty, A. Thiel, A. Thomas, B. Krusche, C. Collicott, 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.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. Witthauer, L. Zana, M. Bashkanov, M. Biroth, M. Dieterle, M. G\\\"unther, 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.B. Otte, P. Drexler, P. Pedroni, P.P. Martel, R. Beck, R. Kondratiev, R. Miskimen, S. Abt, S. Costanza, S. Gardner, S. Garni, 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://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-ex","submitted_at":"2017-04-03T15:40:04Z","title":"Helicity-dependent cross sections and double-polarization observable E in eta photoproduction from quasi-free protons and neutrons"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1704.00649","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:f89d4947486c79bf9ba3d1256671de1dbaa23ac3aa388b472ef54b5a71a18acb","target":"record","created_at":"2026-05-18T00:43:51Z","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":"ef6d9fd5fc373c2e587c5ce2172ecfc5f2df85af1dbc2c4c15f9a24aee114a38","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-ex","submitted_at":"2017-04-03T15:40:04Z","title_canon_sha256":"00735f03ede5dbca2ee9fafaf6924c617095064a2bc0c45d12511552da9bf881"},"schema_version":"1.0","source":{"id":"1704.00649","kind":"arxiv","version":1}},"canonical_sha256":"a8bb63f14fc87f3fbfaca3bda8716eb2594ecb3b8fcb679b3990badfe7a0450b","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a8bb63f14fc87f3fbfaca3bda8716eb2594ecb3b8fcb679b3990badfe7a0450b","first_computed_at":"2026-05-18T00:43:51.013727Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:43:51.013727Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"OI34eXM2Pe9WUu58ly6Ui2H8TJXSZMigF6lhGET5I3jPCt/Yrbmj8CFAFfo/xWJh34vpFcKihgKu9B/4YXigBg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:43:51.014297Z","signed_message":"canonical_sha256_bytes"},"source_id":"1704.00649","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:f89d4947486c79bf9ba3d1256671de1dbaa23ac3aa388b472ef54b5a71a18acb","sha256:92f9750c7930c181b2ba492549be3b89ee87f09d36ee5e79060b947bdcd5eb1c"],"state_sha256":"4fd341ffe91e5bc8f23bbdb388507d5e62d268d8ed3b2ce519805e0c004f2e0d"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"C6IEGYp1TaJ6x5+/gE8vTcBIA/q4fCC3e4Zr3LFWPd0a/WRaDX+VoPn2Xes3d0k+jTWe133YYKU3W9Lsj/tTCA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-03T04:30:26.349583Z","bundle_sha256":"9602daf64eeb49a9874122dfc1cb1dea74ab7be152cd8586cee639427cecf92d"}}