{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2004:KE4KH3U6MJXQJDPXZZBAUKUF6R","short_pith_number":"pith:KE4KH3U6","canonical_record":{"source":{"id":"hep-ex/0402017","kind":"arxiv","version":2},"metadata":{"license":"","primary_cat":"hep-ex","submitted_at":"2004-02-10T10:51:36Z","cross_cats_sorted":[],"title_canon_sha256":"49e0b0ce0e44c3acb99514691e2fd46e9809e229a07aa5bdc13bd8f64c8450eb","abstract_canon_sha256":"593e6d725349345aed020c1145dcd5146344c37721cb79a433714468ca0aa694"},"schema_version":"1.0"},"canonical_sha256":"5138a3ee9e626f048df7ce420a2a85f45be77425d88b815905821852a40524e0","source":{"kind":"arxiv","id":"hep-ex/0402017","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"hep-ex/0402017","created_at":"2026-07-04T15:26:35Z"},{"alias_kind":"arxiv_version","alias_value":"hep-ex/0402017v2","created_at":"2026-07-04T15:26:35Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.hep-ex/0402017","created_at":"2026-07-04T15:26:35Z"},{"alias_kind":"pith_short_12","alias_value":"KE4KH3U6MJXQ","created_at":"2026-07-04T15:26:35Z"},{"alias_kind":"pith_short_16","alias_value":"KE4KH3U6MJXQJDPX","created_at":"2026-07-04T15:26:35Z"},{"alias_kind":"pith_short_8","alias_value":"KE4KH3U6","created_at":"2026-07-04T15:26:35Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2004:KE4KH3U6MJXQJDPXZZBAUKUF6R","target":"record","payload":{"canonical_record":{"source":{"id":"hep-ex/0402017","kind":"arxiv","version":2},"metadata":{"license":"","primary_cat":"hep-ex","submitted_at":"2004-02-10T10:51:36Z","cross_cats_sorted":[],"title_canon_sha256":"49e0b0ce0e44c3acb99514691e2fd46e9809e229a07aa5bdc13bd8f64c8450eb","abstract_canon_sha256":"593e6d725349345aed020c1145dcd5146344c37721cb79a433714468ca0aa694"},"schema_version":"1.0"},"canonical_sha256":"5138a3ee9e626f048df7ce420a2a85f45be77425d88b815905821852a40524e0","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T15:26:35.043301Z","signature_b64":"3damuVNERu5CbAkl4TG4dO2iMrGrwyh56pA/rBfAWJK94AkAYLXQHRZiwib9WI95dy4wr4/lX9wBRIblxPnnDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"5138a3ee9e626f048df7ce420a2a85f45be77425d88b815905821852a40524e0","last_reissued_at":"2026-07-04T15:26:35.042820Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T15:26:35.042820Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"hep-ex/0402017","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":"2026-07-04T15:26:35Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"fxxBIcT9vpM/y5Q9Y5C8OVSdWKxMCzk2dGZjsm6p1n/rSWkUumvieUoTxDRGdEEbSQeC14HbSzMlGI9NuAmOBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-17T18:51:06.193547Z"},"content_sha256":"ce7f1abf6bb61e3576a27783c0a1eaafe0964f21c03491df34eacb1887ce0d6d","schema_version":"1.0","event_id":"sha256:ce7f1abf6bb61e3576a27783c0a1eaafe0964f21c03491df34eacb1887ce0d6d"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2004:KE4KH3U6MJXQJDPXZZBAUKUF6R","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Search for Electron Neutrino Appearance in a 250 km Long-baseline Experiment","license":"","headline":"","cross_cats":[],"primary_cat":"hep-ex","authors_text":"et al, K2K Collaboration: M. H. Ahn","submitted_at":"2004-02-10T10:51:36Z","abstract_excerpt":"We present a search for electron neutrino appearance from accelerator produced muon neutrinos in the K2K long baseline neutrino experiment. One candidate event is found in the data corresponding to an exposure of 4.8*10^19 protons on target. The expected background in the absence of neutrino oscillations is estimated to be 2.4+-0.6 events and is dominated by mis-identification of events from neutral current pi^0 production. We exclude the \\nu_\\mu to \\nu_e oscillations at 90% C.L. for the effective mixing angle in 2-flavor approximation of sin^2(2theta_\\mu_e) (~= 1/2 sin^2 2 th_13) > 0.15 at De"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"hep-ex/0402017","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/hep-ex/0402017/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-04T15:26:35Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"RJHiBVGX5pYd88K59PM/XBQnFHrvB5UL6ONXeTtWFQceQDkT8W+NtPFXgvvAkVj4F1Zc7gPxdrJ6+rpQs2VrAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-17T18:51:06.194339Z"},"content_sha256":"d64483e09881900df3a9bdf90bef21d128edee9e1176653e2498b32bfa95c33c","schema_version":"1.0","event_id":"sha256:d64483e09881900df3a9bdf90bef21d128edee9e1176653e2498b32bfa95c33c"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/KE4KH3U6MJXQJDPXZZBAUKUF6R/bundle.json","state_url":"https://pith.science/pith/KE4KH3U6MJXQJDPXZZBAUKUF6R/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/KE4KH3U6MJXQJDPXZZBAUKUF6R/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":"2026-08-17T18:51:06Z","links":{"resolver":"https://pith.science/pith/KE4KH3U6MJXQJDPXZZBAUKUF6R","bundle":"https://pith.science/pith/KE4KH3U6MJXQJDPXZZBAUKUF6R/bundle.json","state":"https://pith.science/pith/KE4KH3U6MJXQJDPXZZBAUKUF6R/state.json","well_known_bundle":"https://pith.science/.well-known/pith/KE4KH3U6MJXQJDPXZZBAUKUF6R/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2004:KE4KH3U6MJXQJDPXZZBAUKUF6R","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":"593e6d725349345aed020c1145dcd5146344c37721cb79a433714468ca0aa694","cross_cats_sorted":[],"license":"","primary_cat":"hep-ex","submitted_at":"2004-02-10T10:51:36Z","title_canon_sha256":"49e0b0ce0e44c3acb99514691e2fd46e9809e229a07aa5bdc13bd8f64c8450eb"},"schema_version":"1.0","source":{"id":"hep-ex/0402017","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"hep-ex/0402017","created_at":"2026-07-04T15:26:35Z"},{"alias_kind":"arxiv_version","alias_value":"hep-ex/0402017v2","created_at":"2026-07-04T15:26:35Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.hep-ex/0402017","created_at":"2026-07-04T15:26:35Z"},{"alias_kind":"pith_short_12","alias_value":"KE4KH3U6MJXQ","created_at":"2026-07-04T15:26:35Z"},{"alias_kind":"pith_short_16","alias_value":"KE4KH3U6MJXQJDPX","created_at":"2026-07-04T15:26:35Z"},{"alias_kind":"pith_short_8","alias_value":"KE4KH3U6","created_at":"2026-07-04T15:26:35Z"}],"graph_snapshots":[{"event_id":"sha256:d64483e09881900df3a9bdf90bef21d128edee9e1176653e2498b32bfa95c33c","target":"graph","created_at":"2026-07-04T15:26:35Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/hep-ex/0402017/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We present a search for electron neutrino appearance from accelerator produced muon neutrinos in the K2K long baseline neutrino experiment. One candidate event is found in the data corresponding to an exposure of 4.8*10^19 protons on target. The expected background in the absence of neutrino oscillations is estimated to be 2.4+-0.6 events and is dominated by mis-identification of events from neutral current pi^0 production. We exclude the \\nu_\\mu to \\nu_e oscillations at 90% C.L. for the effective mixing angle in 2-flavor approximation of sin^2(2theta_\\mu_e) (~= 1/2 sin^2 2 th_13) > 0.15 at De","authors_text":"et al, K2K Collaboration: M. H. Ahn","cross_cats":[],"headline":"","license":"","primary_cat":"hep-ex","submitted_at":"2004-02-10T10:51:36Z","title":"Search for Electron Neutrino Appearance in a 250 km Long-baseline Experiment"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"hep-ex/0402017","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:ce7f1abf6bb61e3576a27783c0a1eaafe0964f21c03491df34eacb1887ce0d6d","target":"record","created_at":"2026-07-04T15:26:35Z","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":"593e6d725349345aed020c1145dcd5146344c37721cb79a433714468ca0aa694","cross_cats_sorted":[],"license":"","primary_cat":"hep-ex","submitted_at":"2004-02-10T10:51:36Z","title_canon_sha256":"49e0b0ce0e44c3acb99514691e2fd46e9809e229a07aa5bdc13bd8f64c8450eb"},"schema_version":"1.0","source":{"id":"hep-ex/0402017","kind":"arxiv","version":2}},"canonical_sha256":"5138a3ee9e626f048df7ce420a2a85f45be77425d88b815905821852a40524e0","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"5138a3ee9e626f048df7ce420a2a85f45be77425d88b815905821852a40524e0","first_computed_at":"2026-07-04T15:26:35.042820Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T15:26:35.042820Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"3damuVNERu5CbAkl4TG4dO2iMrGrwyh56pA/rBfAWJK94AkAYLXQHRZiwib9WI95dy4wr4/lX9wBRIblxPnnDA==","signature_status":"signed_v1","signed_at":"2026-07-04T15:26:35.043301Z","signed_message":"canonical_sha256_bytes"},"source_id":"hep-ex/0402017","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:ce7f1abf6bb61e3576a27783c0a1eaafe0964f21c03491df34eacb1887ce0d6d","sha256:d64483e09881900df3a9bdf90bef21d128edee9e1176653e2498b32bfa95c33c"],"state_sha256":"6179ad029eccd245350d5992a2b28e74aca6e8031f8defb25e923d0cd9948398"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"cd1H4Npgt5wQoDWX5aYztLaY0KcQsGLo2WfnCrR3bY6c2LcBkcfaSD8UbjcbjmW4Cjyh4oHtkjuZ06Z9+PUTAQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-17T18:51:06.199470Z","bundle_sha256":"27162ec0f41e8c58a50f09fb2aa190a66bd685dce39ecee1401f4cc0bc3b08cb"}}