{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:S3GMCWUUTHMBNVCZSEERAIEBXO","short_pith_number":"pith:S3GMCWUU","canonical_record":{"source":{"id":"1511.02160","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.acc-ph","submitted_at":"2015-11-06T17:08:57Z","cross_cats_sorted":[],"title_canon_sha256":"734588332cc00f35dff423a7bbcf4a4421b0c2961cace437e508077f8dc4173b","abstract_canon_sha256":"1b2df857d02dff3a986c5225e5b78a91914d8bea77c33c65391a8e93d147a1e7"},"schema_version":"1.0"},"canonical_sha256":"96ccc15a9499d816d4599109102081bb98495aa1846bc93fbf6fff83946dc5f4","source":{"kind":"arxiv","id":"1511.02160","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1511.02160","created_at":"2026-05-18T01:27:37Z"},{"alias_kind":"arxiv_version","alias_value":"1511.02160v1","created_at":"2026-05-18T01:27:37Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1511.02160","created_at":"2026-05-18T01:27:37Z"},{"alias_kind":"pith_short_12","alias_value":"S3GMCWUUTHMB","created_at":"2026-05-18T12:29:39Z"},{"alias_kind":"pith_short_16","alias_value":"S3GMCWUUTHMBNVCZ","created_at":"2026-05-18T12:29:39Z"},{"alias_kind":"pith_short_8","alias_value":"S3GMCWUU","created_at":"2026-05-18T12:29:39Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:S3GMCWUUTHMBNVCZSEERAIEBXO","target":"record","payload":{"canonical_record":{"source":{"id":"1511.02160","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.acc-ph","submitted_at":"2015-11-06T17:08:57Z","cross_cats_sorted":[],"title_canon_sha256":"734588332cc00f35dff423a7bbcf4a4421b0c2961cace437e508077f8dc4173b","abstract_canon_sha256":"1b2df857d02dff3a986c5225e5b78a91914d8bea77c33c65391a8e93d147a1e7"},"schema_version":"1.0"},"canonical_sha256":"96ccc15a9499d816d4599109102081bb98495aa1846bc93fbf6fff83946dc5f4","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:27:37.634347Z","signature_b64":"ov93ddMiajmARAOjLh/o3qPau2qNtYLaT4VboOg7cwNN/CsdTQTC7bxvippcTlGcxNxKLXp4sVWTsmZqeoZ/DA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"96ccc15a9499d816d4599109102081bb98495aa1846bc93fbf6fff83946dc5f4","last_reissued_at":"2026-05-18T01:27:37.633839Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:27:37.633839Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1511.02160","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":"2026-05-18T01:27:37Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"HcEbL/igQPS1wUpWlRa1gMImHK3BIMGxQK5JjHSrtmQaHd7JiLpEeBMTv2H6e7itkOOrKZiljN0dvcBnrVJCCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-06T20:57:42.930540Z"},"content_sha256":"f06f3e12b643a93eb95852ccbcf0adf710f8e3fcf57b4ba98db1dd9858f2ed1b","schema_version":"1.0","event_id":"sha256:f06f3e12b643a93eb95852ccbcf0adf710f8e3fcf57b4ba98db1dd9858f2ed1b"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:S3GMCWUUTHMBNVCZSEERAIEBXO","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Hamamatsu PMT R7056 Study for the Extinction Monitoring System of the Mu2e Experiment at Fermilab","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"physics.acc-ph","authors_text":"A. Dyshkant, D. Hedin, E. Johnson (Northern Illinois U.), E. Prebys, P. Rubinov (Fermilab), S. Boi","submitted_at":"2015-11-06T17:08:57Z","abstract_excerpt":"The Mu2e experiment at Fermilab proposes to search for the coherent neutrino-less conversion of muons to electrons in the presence of a nucleus. The experimental signature for an aluminum target is an isolated 105 MeV electron exiting the stopping target no earlier than ~700 ns after the pulse of proton beam hits the production target. Any protons that hit the production target in between the pulses can lead to fake conversion electrons during the measurement period. We define the beam extinction as the ratio of the number of protons striking the production target between pulses to the number "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1511.02160","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":"2026-05-18T01:27:37Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"oBPd7NlHh9bprr2V3zO0qu+nXdEGrYmAEOtOAtJL+zOahf3q60AtGRCBOUXFYMudQRaQkgJur079R6Ekp/MhAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-06T20:57:42.931208Z"},"content_sha256":"3d8443b6b822231c8267f13528b6644c9964aab67aa1862d7fc484e28162a4a6","schema_version":"1.0","event_id":"sha256:3d8443b6b822231c8267f13528b6644c9964aab67aa1862d7fc484e28162a4a6"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/S3GMCWUUTHMBNVCZSEERAIEBXO/bundle.json","state_url":"https://pith.science/pith/S3GMCWUUTHMBNVCZSEERAIEBXO/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/S3GMCWUUTHMBNVCZSEERAIEBXO/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":"2026-06-06T20:57:42Z","links":{"resolver":"https://pith.science/pith/S3GMCWUUTHMBNVCZSEERAIEBXO","bundle":"https://pith.science/pith/S3GMCWUUTHMBNVCZSEERAIEBXO/bundle.json","state":"https://pith.science/pith/S3GMCWUUTHMBNVCZSEERAIEBXO/state.json","well_known_bundle":"https://pith.science/.well-known/pith/S3GMCWUUTHMBNVCZSEERAIEBXO/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:S3GMCWUUTHMBNVCZSEERAIEBXO","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":"1b2df857d02dff3a986c5225e5b78a91914d8bea77c33c65391a8e93d147a1e7","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.acc-ph","submitted_at":"2015-11-06T17:08:57Z","title_canon_sha256":"734588332cc00f35dff423a7bbcf4a4421b0c2961cace437e508077f8dc4173b"},"schema_version":"1.0","source":{"id":"1511.02160","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1511.02160","created_at":"2026-05-18T01:27:37Z"},{"alias_kind":"arxiv_version","alias_value":"1511.02160v1","created_at":"2026-05-18T01:27:37Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1511.02160","created_at":"2026-05-18T01:27:37Z"},{"alias_kind":"pith_short_12","alias_value":"S3GMCWUUTHMB","created_at":"2026-05-18T12:29:39Z"},{"alias_kind":"pith_short_16","alias_value":"S3GMCWUUTHMBNVCZ","created_at":"2026-05-18T12:29:39Z"},{"alias_kind":"pith_short_8","alias_value":"S3GMCWUU","created_at":"2026-05-18T12:29:39Z"}],"graph_snapshots":[{"event_id":"sha256:3d8443b6b822231c8267f13528b6644c9964aab67aa1862d7fc484e28162a4a6","target":"graph","created_at":"2026-05-18T01:27:37Z","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 Mu2e experiment at Fermilab proposes to search for the coherent neutrino-less conversion of muons to electrons in the presence of a nucleus. The experimental signature for an aluminum target is an isolated 105 MeV electron exiting the stopping target no earlier than ~700 ns after the pulse of proton beam hits the production target. Any protons that hit the production target in between the pulses can lead to fake conversion electrons during the measurement period. We define the beam extinction as the ratio of the number of protons striking the production target between pulses to the number ","authors_text":"A. Dyshkant, D. Hedin, E. Johnson (Northern Illinois U.), E. Prebys, P. Rubinov (Fermilab), S. Boi","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.acc-ph","submitted_at":"2015-11-06T17:08:57Z","title":"Hamamatsu PMT R7056 Study for the Extinction Monitoring System of the Mu2e Experiment at Fermilab"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1511.02160","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:f06f3e12b643a93eb95852ccbcf0adf710f8e3fcf57b4ba98db1dd9858f2ed1b","target":"record","created_at":"2026-05-18T01:27:37Z","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":"1b2df857d02dff3a986c5225e5b78a91914d8bea77c33c65391a8e93d147a1e7","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.acc-ph","submitted_at":"2015-11-06T17:08:57Z","title_canon_sha256":"734588332cc00f35dff423a7bbcf4a4421b0c2961cace437e508077f8dc4173b"},"schema_version":"1.0","source":{"id":"1511.02160","kind":"arxiv","version":1}},"canonical_sha256":"96ccc15a9499d816d4599109102081bb98495aa1846bc93fbf6fff83946dc5f4","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"96ccc15a9499d816d4599109102081bb98495aa1846bc93fbf6fff83946dc5f4","first_computed_at":"2026-05-18T01:27:37.633839Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:27:37.633839Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"ov93ddMiajmARAOjLh/o3qPau2qNtYLaT4VboOg7cwNN/CsdTQTC7bxvippcTlGcxNxKLXp4sVWTsmZqeoZ/DA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:27:37.634347Z","signed_message":"canonical_sha256_bytes"},"source_id":"1511.02160","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:f06f3e12b643a93eb95852ccbcf0adf710f8e3fcf57b4ba98db1dd9858f2ed1b","sha256:3d8443b6b822231c8267f13528b6644c9964aab67aa1862d7fc484e28162a4a6"],"state_sha256":"05ee3ad7cd259c46f7a5557cf6e6348c4561b31d8f50ac4e171521dc5520cbd0"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0X04aqP1tMhV8opYmlBzjqX4vS8aAASylkt6kSvv3iRb9F/x+8zDWBvl06lY6LeMFO84NZo2KcMYlFqe46nYBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-06T20:57:42.934693Z","bundle_sha256":"529651d8d78ff5c5c81a9ffed577c72d884965b193d131d4a69850e5f85f911a"}}