{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2011:MJMR7IB3IAZKKJ7HJCGVLJPIDR","short_pith_number":"pith:MJMR7IB3","canonical_record":{"source":{"id":"1111.4075","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2011-11-17T12:34:23Z","cross_cats_sorted":[],"title_canon_sha256":"d2ec0d99b8742309be1344c983eaf28358c0bb2d5aa4295358fd910a850b76c5","abstract_canon_sha256":"be0c33906f2f7febedc536b31b87f3ee8b33e0481c329abd0b3cca391ccb1208"},"schema_version":"1.0"},"canonical_sha256":"62591fa03b4032a527e7488d55a5e81c5849cc3fba370c0d721ae996a8e46837","source":{"kind":"arxiv","id":"1111.4075","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1111.4075","created_at":"2026-05-18T04:08:12Z"},{"alias_kind":"arxiv_version","alias_value":"1111.4075v1","created_at":"2026-05-18T04:08:12Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1111.4075","created_at":"2026-05-18T04:08:12Z"},{"alias_kind":"pith_short_12","alias_value":"MJMR7IB3IAZK","created_at":"2026-05-18T12:26:34Z"},{"alias_kind":"pith_short_16","alias_value":"MJMR7IB3IAZKKJ7H","created_at":"2026-05-18T12:26:34Z"},{"alias_kind":"pith_short_8","alias_value":"MJMR7IB3","created_at":"2026-05-18T12:26:34Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2011:MJMR7IB3IAZKKJ7HJCGVLJPIDR","target":"record","payload":{"canonical_record":{"source":{"id":"1111.4075","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2011-11-17T12:34:23Z","cross_cats_sorted":[],"title_canon_sha256":"d2ec0d99b8742309be1344c983eaf28358c0bb2d5aa4295358fd910a850b76c5","abstract_canon_sha256":"be0c33906f2f7febedc536b31b87f3ee8b33e0481c329abd0b3cca391ccb1208"},"schema_version":"1.0"},"canonical_sha256":"62591fa03b4032a527e7488d55a5e81c5849cc3fba370c0d721ae996a8e46837","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:08:12.023338Z","signature_b64":"QH+Mm/h76Jl+jz4m6X4PNqb8LBT9NdxX7K8DRss1vlaqaJQiTlEY/KaPoBcum/uy1g9fr4Q+mCGMRpsYSpaNBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"62591fa03b4032a527e7488d55a5e81c5849cc3fba370c0d721ae996a8e46837","last_reissued_at":"2026-05-18T04:08:12.022915Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:08:12.022915Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1111.4075","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":"2026-05-18T04:08:12Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"vb2DIy4SG8ZnvYTqkT9HNwtl+UwkgwlRcHaAAdlM+5R+7YM26HdKoOXIg8xdzsHUc9e7hcpQUgJjWhKmmuvWDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T16:31:09.306713Z"},"content_sha256":"3967fa6b7bbc50593f1d77ac74c42e5c7190ffc46c5eab08bc0b7d76f25660d5","schema_version":"1.0","event_id":"sha256:3967fa6b7bbc50593f1d77ac74c42e5c7190ffc46c5eab08bc0b7d76f25660d5"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2011:MJMR7IB3IAZKKJ7HJCGVLJPIDR","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The Large-Angle Photon Veto System for the NA62 Experiment at CERN","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.ins-det","authors_text":"A. Antonelli, B. Angelucci, D. Di Filippo, E. Leonardi, F. Ambrosino, F. Costantini, F. Rafaelli, G. D'Agostini, G. Saracino, I. Mannelli, M. Moulson, M. Napolitano, M. Raggi, M. Serra, P. Massarotti, P. Valente, R. Fantechi, S. Gallorini, S. Giudici, S. Venditti, T. Spadaro, V. Palladino","submitted_at":"2011-11-17T12:34:23Z","abstract_excerpt":"The branching ratio (BR) for the decay K^+ \\rightarrow \\pi^+ \\nu \\bar{\\nu} is a sensitive probe for new physics. The NA62 experiment at the CERN SPS will measure this BR to within about 10%. To reject the dominant background from channels with final state photons, the large-angle vetoes (LAVs) must detect photons of energy as low as 200 MeV with an inefficiency of less than 10^-4, as well as provide energy and time measurements with resolutions of 10% and 1 ns for 1 GeV photons. The LAV detectors make creative reuse of lead glass blocks recycled from the OPAL electromagnetic calorimeter barrel"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1111.4075","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":"2026-05-18T04:08:12Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"dZYpccflvPcnC6bIZhA5hRfI+dssILnm66my+UhlWkZ7zx6ECOlQdVpnFuMhGKv4CbzzGSG+K0QH0SCzksgfAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T16:31:09.307144Z"},"content_sha256":"33dcbba8b51881055e292b5fc0e02e2509c6ad218231a1a48aa17fe156c6de2a","schema_version":"1.0","event_id":"sha256:33dcbba8b51881055e292b5fc0e02e2509c6ad218231a1a48aa17fe156c6de2a"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/MJMR7IB3IAZKKJ7HJCGVLJPIDR/bundle.json","state_url":"https://pith.science/pith/MJMR7IB3IAZKKJ7HJCGVLJPIDR/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/MJMR7IB3IAZKKJ7HJCGVLJPIDR/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":"2026-05-26T16:31:09Z","links":{"resolver":"https://pith.science/pith/MJMR7IB3IAZKKJ7HJCGVLJPIDR","bundle":"https://pith.science/pith/MJMR7IB3IAZKKJ7HJCGVLJPIDR/bundle.json","state":"https://pith.science/pith/MJMR7IB3IAZKKJ7HJCGVLJPIDR/state.json","well_known_bundle":"https://pith.science/.well-known/pith/MJMR7IB3IAZKKJ7HJCGVLJPIDR/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:MJMR7IB3IAZKKJ7HJCGVLJPIDR","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":"be0c33906f2f7febedc536b31b87f3ee8b33e0481c329abd0b3cca391ccb1208","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2011-11-17T12:34:23Z","title_canon_sha256":"d2ec0d99b8742309be1344c983eaf28358c0bb2d5aa4295358fd910a850b76c5"},"schema_version":"1.0","source":{"id":"1111.4075","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1111.4075","created_at":"2026-05-18T04:08:12Z"},{"alias_kind":"arxiv_version","alias_value":"1111.4075v1","created_at":"2026-05-18T04:08:12Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1111.4075","created_at":"2026-05-18T04:08:12Z"},{"alias_kind":"pith_short_12","alias_value":"MJMR7IB3IAZK","created_at":"2026-05-18T12:26:34Z"},{"alias_kind":"pith_short_16","alias_value":"MJMR7IB3IAZKKJ7H","created_at":"2026-05-18T12:26:34Z"},{"alias_kind":"pith_short_8","alias_value":"MJMR7IB3","created_at":"2026-05-18T12:26:34Z"}],"graph_snapshots":[{"event_id":"sha256:33dcbba8b51881055e292b5fc0e02e2509c6ad218231a1a48aa17fe156c6de2a","target":"graph","created_at":"2026-05-18T04:08:12Z","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 branching ratio (BR) for the decay K^+ \\rightarrow \\pi^+ \\nu \\bar{\\nu} is a sensitive probe for new physics. The NA62 experiment at the CERN SPS will measure this BR to within about 10%. To reject the dominant background from channels with final state photons, the large-angle vetoes (LAVs) must detect photons of energy as low as 200 MeV with an inefficiency of less than 10^-4, as well as provide energy and time measurements with resolutions of 10% and 1 ns for 1 GeV photons. The LAV detectors make creative reuse of lead glass blocks recycled from the OPAL electromagnetic calorimeter barrel","authors_text":"A. Antonelli, B. Angelucci, D. Di Filippo, E. Leonardi, F. Ambrosino, F. Costantini, F. Rafaelli, G. D'Agostini, G. Saracino, I. Mannelli, M. Moulson, M. Napolitano, M. Raggi, M. Serra, P. Massarotti, P. Valente, R. Fantechi, S. Gallorini, S. Giudici, S. Venditti, T. Spadaro, V. Palladino","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2011-11-17T12:34:23Z","title":"The Large-Angle Photon Veto System for the NA62 Experiment at CERN"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1111.4075","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":"sha256:3967fa6b7bbc50593f1d77ac74c42e5c7190ffc46c5eab08bc0b7d76f25660d5","target":"record","created_at":"2026-05-18T04:08:12Z","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":"be0c33906f2f7febedc536b31b87f3ee8b33e0481c329abd0b3cca391ccb1208","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2011-11-17T12:34:23Z","title_canon_sha256":"d2ec0d99b8742309be1344c983eaf28358c0bb2d5aa4295358fd910a850b76c5"},"schema_version":"1.0","source":{"id":"1111.4075","kind":"arxiv","version":1}},"canonical_sha256":"62591fa03b4032a527e7488d55a5e81c5849cc3fba370c0d721ae996a8e46837","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"62591fa03b4032a527e7488d55a5e81c5849cc3fba370c0d721ae996a8e46837","first_computed_at":"2026-05-18T04:08:12.022915Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:08:12.022915Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"QH+Mm/h76Jl+jz4m6X4PNqb8LBT9NdxX7K8DRss1vlaqaJQiTlEY/KaPoBcum/uy1g9fr4Q+mCGMRpsYSpaNBg==","signature_status":"signed_v1","signed_at":"2026-05-18T04:08:12.023338Z","signed_message":"canonical_sha256_bytes"},"source_id":"1111.4075","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:3967fa6b7bbc50593f1d77ac74c42e5c7190ffc46c5eab08bc0b7d76f25660d5","sha256:33dcbba8b51881055e292b5fc0e02e2509c6ad218231a1a48aa17fe156c6de2a"],"state_sha256":"cca679ac363b778812a3f8d57e61e3150f8ff099b96a6fc0e768a919a3353076"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"iFcrnG36JiTPkoMxXurvZ8X4A0w4lVS0/amJvdz0E8pL+P1M7YgqvxwB2/ktGz1710MpAKclzTSTwDD3Ek7UAQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T16:31:09.309837Z","bundle_sha256":"467c932c9b11dc70071bf2c2341414fb92a6d495b0457ec459b58af2ac3e43f5"}}