{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2007:2TOVEC3XHLEOT462Y5UQK2LROF","short_pith_number":"pith:2TOVEC3X","canonical_record":{"source":{"id":"hep-ex/0703023","kind":"arxiv","version":2},"metadata":{"license":"","primary_cat":"hep-ex","submitted_at":"2007-03-13T14:28:32Z","cross_cats_sorted":[],"title_canon_sha256":"309ec18941c09da4952099a2dcc6c7cb155ad3c76fb2b05286088884d3dc2161","abstract_canon_sha256":"965480211b1d5ccff5b5c22a6117eab89b211e35f76f8b33c34d25a455d90775"},"schema_version":"1.0"},"canonical_sha256":"d4dd520b773ac8e9f3dac7690569717146722a57b06dbfcac9e6375ae8c812de","source":{"kind":"arxiv","id":"hep-ex/0703023","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"hep-ex/0703023","created_at":"2026-05-18T03:47:22Z"},{"alias_kind":"arxiv_version","alias_value":"hep-ex/0703023v2","created_at":"2026-05-18T03:47:22Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.hep-ex/0703023","created_at":"2026-05-18T03:47:22Z"},{"alias_kind":"pith_short_12","alias_value":"2TOVEC3XHLEO","created_at":"2026-05-18T12:25:54Z"},{"alias_kind":"pith_short_16","alias_value":"2TOVEC3XHLEOT462","created_at":"2026-05-18T12:25:54Z"},{"alias_kind":"pith_short_8","alias_value":"2TOVEC3X","created_at":"2026-05-18T12:25:54Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2007:2TOVEC3XHLEOT462Y5UQK2LROF","target":"record","payload":{"canonical_record":{"source":{"id":"hep-ex/0703023","kind":"arxiv","version":2},"metadata":{"license":"","primary_cat":"hep-ex","submitted_at":"2007-03-13T14:28:32Z","cross_cats_sorted":[],"title_canon_sha256":"309ec18941c09da4952099a2dcc6c7cb155ad3c76fb2b05286088884d3dc2161","abstract_canon_sha256":"965480211b1d5ccff5b5c22a6117eab89b211e35f76f8b33c34d25a455d90775"},"schema_version":"1.0"},"canonical_sha256":"d4dd520b773ac8e9f3dac7690569717146722a57b06dbfcac9e6375ae8c812de","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:47:22.263759Z","signature_b64":"ceEFgZtNIjKQsTqOCtaAe5JidQf4Fh5oSXr3qiDDEhs1tUQYbEZSAQ3dvGF7HBLqQDFYzIQH346Ah1Qbqid/DQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d4dd520b773ac8e9f3dac7690569717146722a57b06dbfcac9e6375ae8c812de","last_reissued_at":"2026-05-18T03:47:22.263030Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:47:22.263030Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"hep-ex/0703023","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T03:47:22Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"2NPBPwKavRWE5d6d37SfzbaLKNAt5PuXg37qWFRwSNK0ptHaJXmplg+i2/0pMJLgH7kvwpIl523Q+NrTQtP9Dw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-09T09:00:07.464545Z"},"content_sha256":"c2814ea44725f2a8c730980571a0bcc41f01a6fe3ede4473f2b3015d858b01db","schema_version":"1.0","event_id":"sha256:c2814ea44725f2a8c730980571a0bcc41f01a6fe3ede4473f2b3015d858b01db"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2007:2TOVEC3XHLEOT462Y5UQK2LROF","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"First observation and branching fraction and decay parameter measurements of the weak radiative decay Xi0 --> Lambda e+e-","license":"","headline":"","cross_cats":[],"primary_cat":"hep-ex","authors_text":"NA48 collaboration","submitted_at":"2007-03-13T14:28:32Z","abstract_excerpt":"The weak radiative decay Xi0 --> Lambda e+e- has been detected for the first time. We find 412 candidates in the signal region, with an estimated background of 15 +/- 5 events. We determine the branching fraction B(Xi0 --> Lambda e+e-) = [7.6 +/- 0.4(stat) +/- 0.4(syst) +/- 0.2(norm)] x 10^{-6}, consistent with an internal bremsstrahlung process, and the decay asymmetry parameter alpha_{XiLambdaee} = -0.8 +/- 0.2, consistent with that of Xi0 --> Lambda gamma. The charge conjugate reaction Xi0_bar --> Lambda_bar e+e- has also been observed."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"hep-ex/0703023","kind":"arxiv","version":2},"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":"2026-05-18T03:47:22Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"/732CX7CZoWKdHkQW+Zk+xPY7yG++zqE4gVfqncUS8ghPbRCXqy6vtwDZCIMlVbjSGJmt0JT/Y/DFIKffloyBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-09T09:00:07.465162Z"},"content_sha256":"aad4d0e172bfb1562c938b457236121363b6ec4456d80a4d341c866b590a2c28","schema_version":"1.0","event_id":"sha256:aad4d0e172bfb1562c938b457236121363b6ec4456d80a4d341c866b590a2c28"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/2TOVEC3XHLEOT462Y5UQK2LROF/bundle.json","state_url":"https://pith.science/pith/2TOVEC3XHLEOT462Y5UQK2LROF/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/2TOVEC3XHLEOT462Y5UQK2LROF/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":"2026-08-09T09:00:07Z","links":{"resolver":"https://pith.science/pith/2TOVEC3XHLEOT462Y5UQK2LROF","bundle":"https://pith.science/pith/2TOVEC3XHLEOT462Y5UQK2LROF/bundle.json","state":"https://pith.science/pith/2TOVEC3XHLEOT462Y5UQK2LROF/state.json","well_known_bundle":"https://pith.science/.well-known/pith/2TOVEC3XHLEOT462Y5UQK2LROF/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2007:2TOVEC3XHLEOT462Y5UQK2LROF","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":"965480211b1d5ccff5b5c22a6117eab89b211e35f76f8b33c34d25a455d90775","cross_cats_sorted":[],"license":"","primary_cat":"hep-ex","submitted_at":"2007-03-13T14:28:32Z","title_canon_sha256":"309ec18941c09da4952099a2dcc6c7cb155ad3c76fb2b05286088884d3dc2161"},"schema_version":"1.0","source":{"id":"hep-ex/0703023","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"hep-ex/0703023","created_at":"2026-05-18T03:47:22Z"},{"alias_kind":"arxiv_version","alias_value":"hep-ex/0703023v2","created_at":"2026-05-18T03:47:22Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.hep-ex/0703023","created_at":"2026-05-18T03:47:22Z"},{"alias_kind":"pith_short_12","alias_value":"2TOVEC3XHLEO","created_at":"2026-05-18T12:25:54Z"},{"alias_kind":"pith_short_16","alias_value":"2TOVEC3XHLEOT462","created_at":"2026-05-18T12:25:54Z"},{"alias_kind":"pith_short_8","alias_value":"2TOVEC3X","created_at":"2026-05-18T12:25:54Z"}],"graph_snapshots":[{"event_id":"sha256:aad4d0e172bfb1562c938b457236121363b6ec4456d80a4d341c866b590a2c28","target":"graph","created_at":"2026-05-18T03:47:22Z","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 weak radiative decay Xi0 --> Lambda e+e- has been detected for the first time. We find 412 candidates in the signal region, with an estimated background of 15 +/- 5 events. We determine the branching fraction B(Xi0 --> Lambda e+e-) = [7.6 +/- 0.4(stat) +/- 0.4(syst) +/- 0.2(norm)] x 10^{-6}, consistent with an internal bremsstrahlung process, and the decay asymmetry parameter alpha_{XiLambdaee} = -0.8 +/- 0.2, consistent with that of Xi0 --> Lambda gamma. The charge conjugate reaction Xi0_bar --> Lambda_bar e+e- has also been observed.","authors_text":"NA48 collaboration","cross_cats":[],"headline":"","license":"","primary_cat":"hep-ex","submitted_at":"2007-03-13T14:28:32Z","title":"First observation and branching fraction and decay parameter measurements of the weak radiative decay Xi0 --> Lambda e+e-"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"hep-ex/0703023","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:c2814ea44725f2a8c730980571a0bcc41f01a6fe3ede4473f2b3015d858b01db","target":"record","created_at":"2026-05-18T03:47:22Z","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":"965480211b1d5ccff5b5c22a6117eab89b211e35f76f8b33c34d25a455d90775","cross_cats_sorted":[],"license":"","primary_cat":"hep-ex","submitted_at":"2007-03-13T14:28:32Z","title_canon_sha256":"309ec18941c09da4952099a2dcc6c7cb155ad3c76fb2b05286088884d3dc2161"},"schema_version":"1.0","source":{"id":"hep-ex/0703023","kind":"arxiv","version":2}},"canonical_sha256":"d4dd520b773ac8e9f3dac7690569717146722a57b06dbfcac9e6375ae8c812de","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d4dd520b773ac8e9f3dac7690569717146722a57b06dbfcac9e6375ae8c812de","first_computed_at":"2026-05-18T03:47:22.263030Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:47:22.263030Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"ceEFgZtNIjKQsTqOCtaAe5JidQf4Fh5oSXr3qiDDEhs1tUQYbEZSAQ3dvGF7HBLqQDFYzIQH346Ah1Qbqid/DQ==","signature_status":"signed_v1","signed_at":"2026-05-18T03:47:22.263759Z","signed_message":"canonical_sha256_bytes"},"source_id":"hep-ex/0703023","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:c2814ea44725f2a8c730980571a0bcc41f01a6fe3ede4473f2b3015d858b01db","sha256:aad4d0e172bfb1562c938b457236121363b6ec4456d80a4d341c866b590a2c28"],"state_sha256":"24d9d3bd2109ec15384cbcd2bc6aa976169e51c7cb3c18f0b78f2b414c28fa45"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"top8QqgX39Smj2fTv0LiuYGP9Aob6km1gglcvcoGsNqXZl01RRZMb71048tJ3oyH3k3lu7gV3Encz2SDdjbCCw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-09T09:00:07.471548Z","bundle_sha256":"8d2633cf9fd85195d624bf5f61cc6de23d650cdefecf2622df774c38f384e733"}}