{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2014:2P2WGJYMT5N2YMEB2XLB5444QG","short_pith_number":"pith:2P2WGJYM","canonical_record":{"source":{"id":"1412.0194","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2014-11-30T07:58:50Z","cross_cats_sorted":["hep-ex","physics.acc-ph"],"title_canon_sha256":"cf83fc145c10792453d93cb6553484461a3902d81c21aef413ef2d9bebca3145","abstract_canon_sha256":"bb9bd9ba00cbdbdfafabccb369745a2096848cb4799966b7647cd3298d87a8e9"},"schema_version":"1.0"},"canonical_sha256":"d3f563270c9f5bac3081d5d61ef39c819ee1603e4dcade21159b44e6d56ad3e9","source":{"kind":"arxiv","id":"1412.0194","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1412.0194","created_at":"2026-05-18T01:12:18Z"},{"alias_kind":"arxiv_version","alias_value":"1412.0194v1","created_at":"2026-05-18T01:12:18Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1412.0194","created_at":"2026-05-18T01:12:18Z"},{"alias_kind":"pith_short_12","alias_value":"2P2WGJYMT5N2","created_at":"2026-05-18T12:28:11Z"},{"alias_kind":"pith_short_16","alias_value":"2P2WGJYMT5N2YMEB","created_at":"2026-05-18T12:28:11Z"},{"alias_kind":"pith_short_8","alias_value":"2P2WGJYM","created_at":"2026-05-18T12:28:11Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2014:2P2WGJYMT5N2YMEB2XLB5444QG","target":"record","payload":{"canonical_record":{"source":{"id":"1412.0194","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2014-11-30T07:58:50Z","cross_cats_sorted":["hep-ex","physics.acc-ph"],"title_canon_sha256":"cf83fc145c10792453d93cb6553484461a3902d81c21aef413ef2d9bebca3145","abstract_canon_sha256":"bb9bd9ba00cbdbdfafabccb369745a2096848cb4799966b7647cd3298d87a8e9"},"schema_version":"1.0"},"canonical_sha256":"d3f563270c9f5bac3081d5d61ef39c819ee1603e4dcade21159b44e6d56ad3e9","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:12:18.611866Z","signature_b64":"CPrJEsYwrnRTrQYRnfqEwCro/ySPBuCQ6jIJLwvbmZxvZn4op2HUOss7cYBshKnRKWnhTHbsZ0zxNWKwuk6qCw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d3f563270c9f5bac3081d5d61ef39c819ee1603e4dcade21159b44e6d56ad3e9","last_reissued_at":"2026-05-18T01:12:18.611479Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:12:18.611479Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1412.0194","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":"2026-05-18T01:12:18Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Jf8/AIaNEK2yuUVaaR63dpWuQtNvGTcA6mcsqATtUdVFJsuvvMc0NWH5pxg8ttYzxwbhb4hsTzI4Q7KdZf12Aw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T08:59:31.375215Z"},"content_sha256":"9f51f4997d0eed87828322a5e548e805eb37cbbd1f279f85ce5afef6bb057c3a","schema_version":"1.0","event_id":"sha256:9f51f4997d0eed87828322a5e548e805eb37cbbd1f279f85ce5afef6bb057c3a"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2014:2P2WGJYMT5N2YMEB2XLB5444QG","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Measurement of the muon beam direction and muon flux for the T2K neutrino experiment","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["hep-ex","physics.acc-ph"],"primary_cat":"physics.ins-det","authors_text":"A. Ariga, A. Ereditato, A.K. Ichikawa, A. Minamino, A. Murakami, C. Bronner, C. Pistillo, F. Bay, F. Juget, H. Kubo, K. Matsuoka, K. Nakayoshi, K. Sakashita, K. Suzuki, K. Yamamoto, M. Friend, M. Hartz, M. Yokoyama, S. Aoki, S. Tada, S.Y. Suzuki, T. Ariga, T. Hiraki, T. Ishida, T. Ishii, T. Kikawa, T. Kobayashi, T. Maruyama, T. Nakadaira, T. Nakaya, T. Sekiguchi, Y. Oyama, Y. Yamada","submitted_at":"2014-11-30T07:58:50Z","abstract_excerpt":"The Tokai-to-Kamioka (T2K) neutrino experiment measures neutrino oscillations by using an almost pure muon neutrino beam produced at the J-PARC accelerator facility. The T2K muon monitor was installed to measure the direction and stability of the muon beam which is produced together with the muon neutrino beam. The systematic error in the muon beam direction measurement was estimated, using data and MC simulation, to be 0.28 mrad. During beam operation, the proton beam has been controlled using measurements from the muon monitor and the direction of the neutrino beam has been tuned to within 0"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1412.0194","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":"2026-05-18T01:12:18Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"45wLTA43hRFHxUsbuMwG4MGvFyJlHxA1O1KYZure4sdAP0lpBvch9tgp0umn9qN+trKOev2EJzmwbHZBRwkWCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T08:59:31.375948Z"},"content_sha256":"121edc1ac8966ceba7282131f869a8f5033e8a56c00364a84402fcd69bc4d1e3","schema_version":"1.0","event_id":"sha256:121edc1ac8966ceba7282131f869a8f5033e8a56c00364a84402fcd69bc4d1e3"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/2P2WGJYMT5N2YMEB2XLB5444QG/bundle.json","state_url":"https://pith.science/pith/2P2WGJYMT5N2YMEB2XLB5444QG/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/2P2WGJYMT5N2YMEB2XLB5444QG/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":"2026-05-30T08:59:31Z","links":{"resolver":"https://pith.science/pith/2P2WGJYMT5N2YMEB2XLB5444QG","bundle":"https://pith.science/pith/2P2WGJYMT5N2YMEB2XLB5444QG/bundle.json","state":"https://pith.science/pith/2P2WGJYMT5N2YMEB2XLB5444QG/state.json","well_known_bundle":"https://pith.science/.well-known/pith/2P2WGJYMT5N2YMEB2XLB5444QG/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:2P2WGJYMT5N2YMEB2XLB5444QG","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":"bb9bd9ba00cbdbdfafabccb369745a2096848cb4799966b7647cd3298d87a8e9","cross_cats_sorted":["hep-ex","physics.acc-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2014-11-30T07:58:50Z","title_canon_sha256":"cf83fc145c10792453d93cb6553484461a3902d81c21aef413ef2d9bebca3145"},"schema_version":"1.0","source":{"id":"1412.0194","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1412.0194","created_at":"2026-05-18T01:12:18Z"},{"alias_kind":"arxiv_version","alias_value":"1412.0194v1","created_at":"2026-05-18T01:12:18Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1412.0194","created_at":"2026-05-18T01:12:18Z"},{"alias_kind":"pith_short_12","alias_value":"2P2WGJYMT5N2","created_at":"2026-05-18T12:28:11Z"},{"alias_kind":"pith_short_16","alias_value":"2P2WGJYMT5N2YMEB","created_at":"2026-05-18T12:28:11Z"},{"alias_kind":"pith_short_8","alias_value":"2P2WGJYM","created_at":"2026-05-18T12:28:11Z"}],"graph_snapshots":[{"event_id":"sha256:121edc1ac8966ceba7282131f869a8f5033e8a56c00364a84402fcd69bc4d1e3","target":"graph","created_at":"2026-05-18T01:12:18Z","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 Tokai-to-Kamioka (T2K) neutrino experiment measures neutrino oscillations by using an almost pure muon neutrino beam produced at the J-PARC accelerator facility. The T2K muon monitor was installed to measure the direction and stability of the muon beam which is produced together with the muon neutrino beam. The systematic error in the muon beam direction measurement was estimated, using data and MC simulation, to be 0.28 mrad. During beam operation, the proton beam has been controlled using measurements from the muon monitor and the direction of the neutrino beam has been tuned to within 0","authors_text":"A. Ariga, A. Ereditato, A.K. Ichikawa, A. Minamino, A. Murakami, C. Bronner, C. Pistillo, F. Bay, F. Juget, H. Kubo, K. Matsuoka, K. Nakayoshi, K. Sakashita, K. Suzuki, K. Yamamoto, M. Friend, M. Hartz, M. Yokoyama, S. Aoki, S. Tada, S.Y. Suzuki, T. Ariga, T. Hiraki, T. Ishida, T. Ishii, T. Kikawa, T. Kobayashi, T. Maruyama, T. Nakadaira, T. Nakaya, T. Sekiguchi, Y. Oyama, Y. Yamada","cross_cats":["hep-ex","physics.acc-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2014-11-30T07:58:50Z","title":"Measurement of the muon beam direction and muon flux for the T2K neutrino experiment"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1412.0194","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":"sha256:9f51f4997d0eed87828322a5e548e805eb37cbbd1f279f85ce5afef6bb057c3a","target":"record","created_at":"2026-05-18T01:12:18Z","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":"bb9bd9ba00cbdbdfafabccb369745a2096848cb4799966b7647cd3298d87a8e9","cross_cats_sorted":["hep-ex","physics.acc-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2014-11-30T07:58:50Z","title_canon_sha256":"cf83fc145c10792453d93cb6553484461a3902d81c21aef413ef2d9bebca3145"},"schema_version":"1.0","source":{"id":"1412.0194","kind":"arxiv","version":1}},"canonical_sha256":"d3f563270c9f5bac3081d5d61ef39c819ee1603e4dcade21159b44e6d56ad3e9","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d3f563270c9f5bac3081d5d61ef39c819ee1603e4dcade21159b44e6d56ad3e9","first_computed_at":"2026-05-18T01:12:18.611479Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:12:18.611479Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"CPrJEsYwrnRTrQYRnfqEwCro/ySPBuCQ6jIJLwvbmZxvZn4op2HUOss7cYBshKnRKWnhTHbsZ0zxNWKwuk6qCw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:12:18.611866Z","signed_message":"canonical_sha256_bytes"},"source_id":"1412.0194","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:9f51f4997d0eed87828322a5e548e805eb37cbbd1f279f85ce5afef6bb057c3a","sha256:121edc1ac8966ceba7282131f869a8f5033e8a56c00364a84402fcd69bc4d1e3"],"state_sha256":"f9fcdd4bd6754cc81331335c5ee385691366feefee2a38bcb2fee1574f71b837"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"pKt9RJx00Fz2Eog+VYePXEXRK9PpnoBNfWJYWqTnShFMFN1Rm2b3ZrDpQC6JT9BFUFAyeTYgn7Wl/5TFVODHCg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-30T08:59:31.379968Z","bundle_sha256":"1bb27103379a839a9c79f9e9a496d7584c2bee7e8fcebaaf7fa33b02c5138426"}}