{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:O3EDW7MOLJYTOPWGUQWHRYG6ZH","short_pith_number":"pith:O3EDW7MO","canonical_record":{"source":{"id":"1608.08523","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ex","submitted_at":"2016-08-30T15:57:22Z","cross_cats_sorted":["nucl-ex"],"title_canon_sha256":"b1a3c633b267a8e135feb05ff8ef448bf9e17e9bf9b2b56f1d3e021fb30bd48d","abstract_canon_sha256":"67ae9b0314812e662f53fdf3f6cfc62009b2ff2ab58ce2f58addfb6446b6bf6c"},"schema_version":"1.0"},"canonical_sha256":"76c83b7d8e5a71373ec6a42c78e0dec9cf132bc47e5a13893fdbbf2758d38f6d","source":{"kind":"arxiv","id":"1608.08523","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1608.08523","created_at":"2026-05-18T01:06:25Z"},{"alias_kind":"arxiv_version","alias_value":"1608.08523v1","created_at":"2026-05-18T01:06:25Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1608.08523","created_at":"2026-05-18T01:06:25Z"},{"alias_kind":"pith_short_12","alias_value":"O3EDW7MOLJYT","created_at":"2026-05-18T12:30:36Z"},{"alias_kind":"pith_short_16","alias_value":"O3EDW7MOLJYTOPWG","created_at":"2026-05-18T12:30:36Z"},{"alias_kind":"pith_short_8","alias_value":"O3EDW7MO","created_at":"2026-05-18T12:30:36Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:O3EDW7MOLJYTOPWGUQWHRYG6ZH","target":"record","payload":{"canonical_record":{"source":{"id":"1608.08523","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ex","submitted_at":"2016-08-30T15:57:22Z","cross_cats_sorted":["nucl-ex"],"title_canon_sha256":"b1a3c633b267a8e135feb05ff8ef448bf9e17e9bf9b2b56f1d3e021fb30bd48d","abstract_canon_sha256":"67ae9b0314812e662f53fdf3f6cfc62009b2ff2ab58ce2f58addfb6446b6bf6c"},"schema_version":"1.0"},"canonical_sha256":"76c83b7d8e5a71373ec6a42c78e0dec9cf132bc47e5a13893fdbbf2758d38f6d","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:06:25.033549Z","signature_b64":"AGxrxnFYT6qt5yOLfEvvAX9HENATZ41CbQytjkHVjuTarzHkH7mj6kMWgKe6drcxy0Dr7k/wKwK0S9L4LPvfCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"76c83b7d8e5a71373ec6a42c78e0dec9cf132bc47e5a13893fdbbf2758d38f6d","last_reissued_at":"2026-05-18T01:06:25.033169Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:06:25.033169Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1608.08523","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":"2026-05-18T01:06:25Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"wzhPY1T9gUbyq3xFLnguSejKG5dj9q1pXg5hirfWOSQvqfsB67lyCaSrdqaK/ygLIQNy1kIcrHw0H/CTIgwuDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T12:37:42.336701Z"},"content_sha256":"ccf70cac2cce415ea5af33ff76c27bc9f1262e6ea10ac27dbf7683cccb5c963d","schema_version":"1.0","event_id":"sha256:ccf70cac2cce415ea5af33ff76c27bc9f1262e6ea10ac27dbf7683cccb5c963d"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:O3EDW7MOLJYTOPWGUQWHRYG6ZH","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Search for $\\Theta^+(1540)$ emission in hadron--nucleus collisions at 400--700 GeV","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["nucl-ex"],"primary_cat":"hep-ex","authors_text":"A.E. Asratyan, V.A. Matveev","submitted_at":"2016-08-30T15:57:22Z","abstract_excerpt":"The data on hadron--nucleus collisions at 400--700 GeV, collected by the SELEX experiment at Fermilab, are analyzed for formation of the exotic pentaquark baryon $\\Theta^+(1540)$. A narrow enhancement near 1539 MeV is observed in the mass spectrum of the $pK^0_S$ system emitted at small $x_F$ from hadron collisions with copper nuclei. The statistical significance of the peak is near 9 standard deviations. Fitted width of the observed $pK^0_S$ resonance is consistent with being entirely due to experimental resolution, and its intrinsic width is restricted to $\\Gamma < 3$ MeV at 90\\% CL. The dat"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1608.08523","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":"2026-05-18T01:06:25Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"s+prVo3snr9nOUsXKbL2LLmrh/CWz5G/0ZNAOgkHECz6uDxfhvsWgg3yn7+sF4ejjU1ZYu0toBHKtVQHaxiwAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T12:37:42.337054Z"},"content_sha256":"7d6849a98796abf41783ab3533adb121d1be4b5c27bf36b15af1e67fd0017d09","schema_version":"1.0","event_id":"sha256:7d6849a98796abf41783ab3533adb121d1be4b5c27bf36b15af1e67fd0017d09"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/O3EDW7MOLJYTOPWGUQWHRYG6ZH/bundle.json","state_url":"https://pith.science/pith/O3EDW7MOLJYTOPWGUQWHRYG6ZH/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/O3EDW7MOLJYTOPWGUQWHRYG6ZH/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":"2026-06-03T12:37:42Z","links":{"resolver":"https://pith.science/pith/O3EDW7MOLJYTOPWGUQWHRYG6ZH","bundle":"https://pith.science/pith/O3EDW7MOLJYTOPWGUQWHRYG6ZH/bundle.json","state":"https://pith.science/pith/O3EDW7MOLJYTOPWGUQWHRYG6ZH/state.json","well_known_bundle":"https://pith.science/.well-known/pith/O3EDW7MOLJYTOPWGUQWHRYG6ZH/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:O3EDW7MOLJYTOPWGUQWHRYG6ZH","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":"67ae9b0314812e662f53fdf3f6cfc62009b2ff2ab58ce2f58addfb6446b6bf6c","cross_cats_sorted":["nucl-ex"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ex","submitted_at":"2016-08-30T15:57:22Z","title_canon_sha256":"b1a3c633b267a8e135feb05ff8ef448bf9e17e9bf9b2b56f1d3e021fb30bd48d"},"schema_version":"1.0","source":{"id":"1608.08523","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1608.08523","created_at":"2026-05-18T01:06:25Z"},{"alias_kind":"arxiv_version","alias_value":"1608.08523v1","created_at":"2026-05-18T01:06:25Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1608.08523","created_at":"2026-05-18T01:06:25Z"},{"alias_kind":"pith_short_12","alias_value":"O3EDW7MOLJYT","created_at":"2026-05-18T12:30:36Z"},{"alias_kind":"pith_short_16","alias_value":"O3EDW7MOLJYTOPWG","created_at":"2026-05-18T12:30:36Z"},{"alias_kind":"pith_short_8","alias_value":"O3EDW7MO","created_at":"2026-05-18T12:30:36Z"}],"graph_snapshots":[{"event_id":"sha256:7d6849a98796abf41783ab3533adb121d1be4b5c27bf36b15af1e67fd0017d09","target":"graph","created_at":"2026-05-18T01:06:25Z","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 data on hadron--nucleus collisions at 400--700 GeV, collected by the SELEX experiment at Fermilab, are analyzed for formation of the exotic pentaquark baryon $\\Theta^+(1540)$. A narrow enhancement near 1539 MeV is observed in the mass spectrum of the $pK^0_S$ system emitted at small $x_F$ from hadron collisions with copper nuclei. The statistical significance of the peak is near 9 standard deviations. Fitted width of the observed $pK^0_S$ resonance is consistent with being entirely due to experimental resolution, and its intrinsic width is restricted to $\\Gamma < 3$ MeV at 90\\% CL. The dat","authors_text":"A.E. Asratyan, V.A. Matveev","cross_cats":["nucl-ex"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ex","submitted_at":"2016-08-30T15:57:22Z","title":"Search for $\\Theta^+(1540)$ emission in hadron--nucleus collisions at 400--700 GeV"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1608.08523","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:ccf70cac2cce415ea5af33ff76c27bc9f1262e6ea10ac27dbf7683cccb5c963d","target":"record","created_at":"2026-05-18T01:06:25Z","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":"67ae9b0314812e662f53fdf3f6cfc62009b2ff2ab58ce2f58addfb6446b6bf6c","cross_cats_sorted":["nucl-ex"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ex","submitted_at":"2016-08-30T15:57:22Z","title_canon_sha256":"b1a3c633b267a8e135feb05ff8ef448bf9e17e9bf9b2b56f1d3e021fb30bd48d"},"schema_version":"1.0","source":{"id":"1608.08523","kind":"arxiv","version":1}},"canonical_sha256":"76c83b7d8e5a71373ec6a42c78e0dec9cf132bc47e5a13893fdbbf2758d38f6d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"76c83b7d8e5a71373ec6a42c78e0dec9cf132bc47e5a13893fdbbf2758d38f6d","first_computed_at":"2026-05-18T01:06:25.033169Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:06:25.033169Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"AGxrxnFYT6qt5yOLfEvvAX9HENATZ41CbQytjkHVjuTarzHkH7mj6kMWgKe6drcxy0Dr7k/wKwK0S9L4LPvfCg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:06:25.033549Z","signed_message":"canonical_sha256_bytes"},"source_id":"1608.08523","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:ccf70cac2cce415ea5af33ff76c27bc9f1262e6ea10ac27dbf7683cccb5c963d","sha256:7d6849a98796abf41783ab3533adb121d1be4b5c27bf36b15af1e67fd0017d09"],"state_sha256":"85deb4d4b588a95e2a143dd033c342d8ad05d9ca03bb5f576efd2486aecd774a"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"nFMGbPT+vzu/gre442bYAaBduyGbkq2fI5Lcm7TpHN01YTHI/h40PjMZ/h1NgnJprVbOAZauxGNGx+wnlyP7Bw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-03T12:37:42.343814Z","bundle_sha256":"37b4e70b07d55ce3c990f9f218664260e26337ee5e05870a05618d191b57781a"}}