{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2011:F233XQZZWBI44ID5Z6F5IREO4E","short_pith_number":"pith:F233XQZZ","canonical_record":{"source":{"id":"1111.5240","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ex","submitted_at":"2011-11-22T16:20:06Z","cross_cats_sorted":[],"title_canon_sha256":"5964e7f9293a065f05004c0a9a6b968fd5781b3a5423476cdf72520d49dfc1d1","abstract_canon_sha256":"59cecba718edc8b67e0fd63453cb788e229153de0544ca8449abe9406beb1177"},"schema_version":"1.0"},"canonical_sha256":"2eb7bbc339b051ce207dcf8bd4448ee1236412b6f26a99853dc91ca5e176ce4c","source":{"kind":"arxiv","id":"1111.5240","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1111.5240","created_at":"2026-05-18T04:07:53Z"},{"alias_kind":"arxiv_version","alias_value":"1111.5240v1","created_at":"2026-05-18T04:07:53Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1111.5240","created_at":"2026-05-18T04:07:53Z"},{"alias_kind":"pith_short_12","alias_value":"F233XQZZWBI4","created_at":"2026-05-18T12:26:28Z"},{"alias_kind":"pith_short_16","alias_value":"F233XQZZWBI44ID5","created_at":"2026-05-18T12:26:28Z"},{"alias_kind":"pith_short_8","alias_value":"F233XQZZ","created_at":"2026-05-18T12:26:28Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2011:F233XQZZWBI44ID5Z6F5IREO4E","target":"record","payload":{"canonical_record":{"source":{"id":"1111.5240","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ex","submitted_at":"2011-11-22T16:20:06Z","cross_cats_sorted":[],"title_canon_sha256":"5964e7f9293a065f05004c0a9a6b968fd5781b3a5423476cdf72520d49dfc1d1","abstract_canon_sha256":"59cecba718edc8b67e0fd63453cb788e229153de0544ca8449abe9406beb1177"},"schema_version":"1.0"},"canonical_sha256":"2eb7bbc339b051ce207dcf8bd4448ee1236412b6f26a99853dc91ca5e176ce4c","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:07:53.100293Z","signature_b64":"E/CubSr1ufew7T7FKOONL2gXk+ozihBRAq4b7RN3DVsR6JAypaMQ05FbM6W1FDDA1cGNLnUR5o7DJwr1nHwOAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"2eb7bbc339b051ce207dcf8bd4448ee1236412b6f26a99853dc91ca5e176ce4c","last_reissued_at":"2026-05-18T04:07:53.099645Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:07:53.099645Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1111.5240","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":"2026-05-18T04:07:53Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"M234TcoydCVFsqjyFn02OFePdNUGp35AoiPd4b1e1g+fzGIR+WSVIbGjTOz9GrqUI3mZkXlb7+93gixd0wHfAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T09:32:17.556260Z"},"content_sha256":"cda1cbf80bdd8e02724ae3023d8951256708d9d2024cb7ef072b9890638905e7","schema_version":"1.0","event_id":"sha256:cda1cbf80bdd8e02724ae3023d8951256708d9d2024cb7ef072b9890638905e7"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2011:F233XQZZWBI44ID5Z6F5IREO4E","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Feasibility study of measuring CP symmetry violation via eta->4pi decay using WASA-at-COSY detector","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"hep-ex","authors_text":"Tomasz Bednarski","submitted_at":"2011-11-22T16:20:06Z","abstract_excerpt":"It is known that the Standard Model does not describe all phenomena related to subatomic particles. This thesis presents feasibility studies of the measurement of eta meson decay using WASA-at-COSY detector which tests predictions of the Standard Model. The aim of this thesis is to estimate the time of measurement for which the current branching ratio limit of eta -> 4pi0 decay can be improved. In order to estimate the time of measurement Monte Carlo simulations were performed. Kinematics of the pp -> ppeta -> pp4pi0 -> pp8gamma reactions were simulated using PLUTO program. Next, by means of t"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1111.5240","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":"2026-05-18T04:07:53Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"F+7kOioUpLJEj4y4XHp5XyBIbHSDR0XHboEM3wLzzEgPORdtTfx+q0xtyFAIAkWVGAxlZnfDA8/l+yQDXXEJAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T09:32:17.556695Z"},"content_sha256":"3700ae893ab2eeba767a93f78c812813db67875113d5b886f17033ccac439699","schema_version":"1.0","event_id":"sha256:3700ae893ab2eeba767a93f78c812813db67875113d5b886f17033ccac439699"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/F233XQZZWBI44ID5Z6F5IREO4E/bundle.json","state_url":"https://pith.science/pith/F233XQZZWBI44ID5Z6F5IREO4E/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/F233XQZZWBI44ID5Z6F5IREO4E/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":"2026-05-30T09:32:17Z","links":{"resolver":"https://pith.science/pith/F233XQZZWBI44ID5Z6F5IREO4E","bundle":"https://pith.science/pith/F233XQZZWBI44ID5Z6F5IREO4E/bundle.json","state":"https://pith.science/pith/F233XQZZWBI44ID5Z6F5IREO4E/state.json","well_known_bundle":"https://pith.science/.well-known/pith/F233XQZZWBI44ID5Z6F5IREO4E/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:F233XQZZWBI44ID5Z6F5IREO4E","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":"59cecba718edc8b67e0fd63453cb788e229153de0544ca8449abe9406beb1177","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ex","submitted_at":"2011-11-22T16:20:06Z","title_canon_sha256":"5964e7f9293a065f05004c0a9a6b968fd5781b3a5423476cdf72520d49dfc1d1"},"schema_version":"1.0","source":{"id":"1111.5240","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1111.5240","created_at":"2026-05-18T04:07:53Z"},{"alias_kind":"arxiv_version","alias_value":"1111.5240v1","created_at":"2026-05-18T04:07:53Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1111.5240","created_at":"2026-05-18T04:07:53Z"},{"alias_kind":"pith_short_12","alias_value":"F233XQZZWBI4","created_at":"2026-05-18T12:26:28Z"},{"alias_kind":"pith_short_16","alias_value":"F233XQZZWBI44ID5","created_at":"2026-05-18T12:26:28Z"},{"alias_kind":"pith_short_8","alias_value":"F233XQZZ","created_at":"2026-05-18T12:26:28Z"}],"graph_snapshots":[{"event_id":"sha256:3700ae893ab2eeba767a93f78c812813db67875113d5b886f17033ccac439699","target":"graph","created_at":"2026-05-18T04:07:53Z","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":"It is known that the Standard Model does not describe all phenomena related to subatomic particles. This thesis presents feasibility studies of the measurement of eta meson decay using WASA-at-COSY detector which tests predictions of the Standard Model. The aim of this thesis is to estimate the time of measurement for which the current branching ratio limit of eta -> 4pi0 decay can be improved. In order to estimate the time of measurement Monte Carlo simulations were performed. Kinematics of the pp -> ppeta -> pp4pi0 -> pp8gamma reactions were simulated using PLUTO program. Next, by means of t","authors_text":"Tomasz Bednarski","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ex","submitted_at":"2011-11-22T16:20:06Z","title":"Feasibility study of measuring CP symmetry violation via eta->4pi decay using WASA-at-COSY detector"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1111.5240","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:cda1cbf80bdd8e02724ae3023d8951256708d9d2024cb7ef072b9890638905e7","target":"record","created_at":"2026-05-18T04:07:53Z","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":"59cecba718edc8b67e0fd63453cb788e229153de0544ca8449abe9406beb1177","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ex","submitted_at":"2011-11-22T16:20:06Z","title_canon_sha256":"5964e7f9293a065f05004c0a9a6b968fd5781b3a5423476cdf72520d49dfc1d1"},"schema_version":"1.0","source":{"id":"1111.5240","kind":"arxiv","version":1}},"canonical_sha256":"2eb7bbc339b051ce207dcf8bd4448ee1236412b6f26a99853dc91ca5e176ce4c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"2eb7bbc339b051ce207dcf8bd4448ee1236412b6f26a99853dc91ca5e176ce4c","first_computed_at":"2026-05-18T04:07:53.099645Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:07:53.099645Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"E/CubSr1ufew7T7FKOONL2gXk+ozihBRAq4b7RN3DVsR6JAypaMQ05FbM6W1FDDA1cGNLnUR5o7DJwr1nHwOAg==","signature_status":"signed_v1","signed_at":"2026-05-18T04:07:53.100293Z","signed_message":"canonical_sha256_bytes"},"source_id":"1111.5240","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:cda1cbf80bdd8e02724ae3023d8951256708d9d2024cb7ef072b9890638905e7","sha256:3700ae893ab2eeba767a93f78c812813db67875113d5b886f17033ccac439699"],"state_sha256":"66d701849f67cf4702616d6e6704220dc3b2675715e9773c0cfdcf4a5a4960b3"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"2qK26k6ivvc/8v+hNlTrNgzTCDfRx+E3MInsgBHs+FhMJdiedNQupykiOyJJ54/SKIjYc0LoH+S0p0oG8V0bDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-30T09:32:17.559532Z","bundle_sha256":"6bdefbb00b5ec83fa172b5cb150c7d458d7a65601d6354ba963e0e42d65bf9e7"}}