{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2014:4JXH4X6HT4DZKEJFORDV5GC5KY","short_pith_number":"pith:4JXH4X6H","canonical_record":{"source":{"id":"1401.7516","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-ex","submitted_at":"2014-01-29T14:01:23Z","cross_cats_sorted":[],"title_canon_sha256":"fdc41a9fdba922e29dbaaa5b38c870806ea76d3ff7eeb23838a7a9a363df17ec","abstract_canon_sha256":"6fd739ae29a0d548380e2553b3aa8103adba9122400e3656272f02d20ebf1b2f"},"schema_version":"1.0"},"canonical_sha256":"e26e7e5fc79f0795112574475e985d56197a95278a3b3254b6e3f044f52cd999","source":{"kind":"arxiv","id":"1401.7516","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1401.7516","created_at":"2026-05-18T01:44:59Z"},{"alias_kind":"arxiv_version","alias_value":"1401.7516v3","created_at":"2026-05-18T01:44:59Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1401.7516","created_at":"2026-05-18T01:44:59Z"},{"alias_kind":"pith_short_12","alias_value":"4JXH4X6HT4DZ","created_at":"2026-05-18T12:28:14Z"},{"alias_kind":"pith_short_16","alias_value":"4JXH4X6HT4DZKEJF","created_at":"2026-05-18T12:28:14Z"},{"alias_kind":"pith_short_8","alias_value":"4JXH4X6H","created_at":"2026-05-18T12:28:14Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2014:4JXH4X6HT4DZKEJFORDV5GC5KY","target":"record","payload":{"canonical_record":{"source":{"id":"1401.7516","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-ex","submitted_at":"2014-01-29T14:01:23Z","cross_cats_sorted":[],"title_canon_sha256":"fdc41a9fdba922e29dbaaa5b38c870806ea76d3ff7eeb23838a7a9a363df17ec","abstract_canon_sha256":"6fd739ae29a0d548380e2553b3aa8103adba9122400e3656272f02d20ebf1b2f"},"schema_version":"1.0"},"canonical_sha256":"e26e7e5fc79f0795112574475e985d56197a95278a3b3254b6e3f044f52cd999","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:44:59.837470Z","signature_b64":"+Ie4vCD7vjUTVy65YOOFZ0Fz5OFiV4eX7YF6Y9F5m8J61qsXE0ot7JdBaXokUCUsp8rd1zDttsXMlNGEy4u4BA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e26e7e5fc79f0795112574475e985d56197a95278a3b3254b6e3f044f52cd999","last_reissued_at":"2026-05-18T01:44:59.836809Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:44:59.836809Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1401.7516","source_version":3,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:44:59Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"QbEPniQTJylH7m6H/om9EvngYlrU0Y52N0aGfV8pH8KHJjlO8Y+Od/muUBrMS/+vhQv/KwtHlZTrrA72LfI9CA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T11:31:24.442783Z"},"content_sha256":"4c89105b84653f045d2899663ac2e4341ff35e7e251e74df1dd79a8ecfbe13aa","schema_version":"1.0","event_id":"sha256:4c89105b84653f045d2899663ac2e4341ff35e7e251e74df1dd79a8ecfbe13aa"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2014:4JXH4X6HT4DZKEJFORDV5GC5KY","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Study of the eta meson production with polarized proton beam","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"nucl-ex","authors_text":"I. Ozerianska, M. Hodana, M. Zielinski, P. Moskal","submitted_at":"2014-01-29T14:01:23Z","abstract_excerpt":"The pp-> pp eta reaction was investigated at excess energies of 15 MeV and 72 MeV using the azimuthally symmetric WASA detector and a polarized proton beam of the Cooler Synchrotron COSY. The aim of the studies is the determination of partial wave contributions to the production process of the eta meson in nucleon-nucleon collisions. Here we present preliminary results of the extraction of the position of the interaction region with respect to the WASA detector and preliminary results on the degree of polarization of the COSY proton beam used in the experiment."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1401.7516","kind":"arxiv","version":3},"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":"2026-05-18T01:44:59Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"woX5JNKpQK3YFPj0+z3AzyM5p/etRX5rcvXX7kroYr9x6UxUDCrI8oUz1gd0uDbQpWujthne6C6ycjDrZkdtBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T11:31:24.443121Z"},"content_sha256":"75dca7b9b5842ab545a4f1a850f2c62e89ec09e3bc74c6d7d0a704fcffc6a2a9","schema_version":"1.0","event_id":"sha256:75dca7b9b5842ab545a4f1a850f2c62e89ec09e3bc74c6d7d0a704fcffc6a2a9"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/4JXH4X6HT4DZKEJFORDV5GC5KY/bundle.json","state_url":"https://pith.science/pith/4JXH4X6HT4DZKEJFORDV5GC5KY/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/4JXH4X6HT4DZKEJFORDV5GC5KY/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":"2026-05-28T11:31:24Z","links":{"resolver":"https://pith.science/pith/4JXH4X6HT4DZKEJFORDV5GC5KY","bundle":"https://pith.science/pith/4JXH4X6HT4DZKEJFORDV5GC5KY/bundle.json","state":"https://pith.science/pith/4JXH4X6HT4DZKEJFORDV5GC5KY/state.json","well_known_bundle":"https://pith.science/.well-known/pith/4JXH4X6HT4DZKEJFORDV5GC5KY/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:4JXH4X6HT4DZKEJFORDV5GC5KY","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":"6fd739ae29a0d548380e2553b3aa8103adba9122400e3656272f02d20ebf1b2f","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-ex","submitted_at":"2014-01-29T14:01:23Z","title_canon_sha256":"fdc41a9fdba922e29dbaaa5b38c870806ea76d3ff7eeb23838a7a9a363df17ec"},"schema_version":"1.0","source":{"id":"1401.7516","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1401.7516","created_at":"2026-05-18T01:44:59Z"},{"alias_kind":"arxiv_version","alias_value":"1401.7516v3","created_at":"2026-05-18T01:44:59Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1401.7516","created_at":"2026-05-18T01:44:59Z"},{"alias_kind":"pith_short_12","alias_value":"4JXH4X6HT4DZ","created_at":"2026-05-18T12:28:14Z"},{"alias_kind":"pith_short_16","alias_value":"4JXH4X6HT4DZKEJF","created_at":"2026-05-18T12:28:14Z"},{"alias_kind":"pith_short_8","alias_value":"4JXH4X6H","created_at":"2026-05-18T12:28:14Z"}],"graph_snapshots":[{"event_id":"sha256:75dca7b9b5842ab545a4f1a850f2c62e89ec09e3bc74c6d7d0a704fcffc6a2a9","target":"graph","created_at":"2026-05-18T01:44:59Z","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 pp-> pp eta reaction was investigated at excess energies of 15 MeV and 72 MeV using the azimuthally symmetric WASA detector and a polarized proton beam of the Cooler Synchrotron COSY. The aim of the studies is the determination of partial wave contributions to the production process of the eta meson in nucleon-nucleon collisions. Here we present preliminary results of the extraction of the position of the interaction region with respect to the WASA detector and preliminary results on the degree of polarization of the COSY proton beam used in the experiment.","authors_text":"I. Ozerianska, M. Hodana, M. Zielinski, P. Moskal","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-ex","submitted_at":"2014-01-29T14:01:23Z","title":"Study of the eta meson production with polarized proton beam"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1401.7516","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":"sha256:4c89105b84653f045d2899663ac2e4341ff35e7e251e74df1dd79a8ecfbe13aa","target":"record","created_at":"2026-05-18T01:44:59Z","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":"6fd739ae29a0d548380e2553b3aa8103adba9122400e3656272f02d20ebf1b2f","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-ex","submitted_at":"2014-01-29T14:01:23Z","title_canon_sha256":"fdc41a9fdba922e29dbaaa5b38c870806ea76d3ff7eeb23838a7a9a363df17ec"},"schema_version":"1.0","source":{"id":"1401.7516","kind":"arxiv","version":3}},"canonical_sha256":"e26e7e5fc79f0795112574475e985d56197a95278a3b3254b6e3f044f52cd999","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e26e7e5fc79f0795112574475e985d56197a95278a3b3254b6e3f044f52cd999","first_computed_at":"2026-05-18T01:44:59.836809Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:44:59.836809Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"+Ie4vCD7vjUTVy65YOOFZ0Fz5OFiV4eX7YF6Y9F5m8J61qsXE0ot7JdBaXokUCUsp8rd1zDttsXMlNGEy4u4BA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:44:59.837470Z","signed_message":"canonical_sha256_bytes"},"source_id":"1401.7516","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:4c89105b84653f045d2899663ac2e4341ff35e7e251e74df1dd79a8ecfbe13aa","sha256:75dca7b9b5842ab545a4f1a850f2c62e89ec09e3bc74c6d7d0a704fcffc6a2a9"],"state_sha256":"b529f38c83654ccafdaa15cfe44c961b9bb46360fc1f42ca68deaed76382d539"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"DxNcPLO9jJQkQBVtAi0nCufKb9fIdM61R6ptX+xkNU33Jf0Wjuft8uAhngVlAM2C0ZAUPdluJxmENOO/CGsxAQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-28T11:31:24.445001Z","bundle_sha256":"5672b604d5684d249ec3dd8d7ae318c2f242abca0a7d2045ed0869ab9f5f787d"}}