{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:NRYRLE4S3Q4XPYXDGRWZ7DWA4F","short_pith_number":"pith:NRYRLE4S","canonical_record":{"source":{"id":"1804.06895","kind":"arxiv","version":4},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2018-04-16T19:05:23Z","cross_cats_sorted":[],"title_canon_sha256":"259c3214afc51de644a8c30812278f7051ded581e7de7434fa750ac212d819f0","abstract_canon_sha256":"f98c3de3e64b123a707761e6ac9dd0b565e3a1d67c7dd7eb73a33cf1ce801a01"},"schema_version":"1.0"},"canonical_sha256":"6c71159392dc3977e2e3346d9f8ec0e15ca5b6494eb5f20c6d708daa7369e663","source":{"kind":"arxiv","id":"1804.06895","version":4},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1804.06895","created_at":"2026-05-17T23:49:05Z"},{"alias_kind":"arxiv_version","alias_value":"1804.06895v4","created_at":"2026-05-17T23:49:05Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1804.06895","created_at":"2026-05-17T23:49:05Z"},{"alias_kind":"pith_short_12","alias_value":"NRYRLE4S3Q4X","created_at":"2026-05-18T12:32:40Z"},{"alias_kind":"pith_short_16","alias_value":"NRYRLE4S3Q4XPYXD","created_at":"2026-05-18T12:32:40Z"},{"alias_kind":"pith_short_8","alias_value":"NRYRLE4S","created_at":"2026-05-18T12:32:40Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:NRYRLE4S3Q4XPYXDGRWZ7DWA4F","target":"record","payload":{"canonical_record":{"source":{"id":"1804.06895","kind":"arxiv","version":4},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2018-04-16T19:05:23Z","cross_cats_sorted":[],"title_canon_sha256":"259c3214afc51de644a8c30812278f7051ded581e7de7434fa750ac212d819f0","abstract_canon_sha256":"f98c3de3e64b123a707761e6ac9dd0b565e3a1d67c7dd7eb73a33cf1ce801a01"},"schema_version":"1.0"},"canonical_sha256":"6c71159392dc3977e2e3346d9f8ec0e15ca5b6494eb5f20c6d708daa7369e663","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:49:05.845420Z","signature_b64":"Bg0vagb9vghg4Cdzipb/J/7addGfE/PRoRKN05upCTi212rpao0rP58iHITbEBk3A5J9s/UMbHvbToLF8N7mDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"6c71159392dc3977e2e3346d9f8ec0e15ca5b6494eb5f20c6d708daa7369e663","last_reissued_at":"2026-05-17T23:49:05.844778Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:49:05.844778Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1804.06895","source_version":4,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-17T23:49:05Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"qM7yNFMtUOcfJZri5mY3bqUQn7SvCn0fEFAngJgRGDds9g/7Ggjs2ktFnirKUd8yP3aubfBZXk6RnAWxbmqNDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T22:22:29.766350Z"},"content_sha256":"f9ead29aeca9f646e8738e454b209aadda66cc408e1a5f2e2ceb6f8b955be5cb","schema_version":"1.0","event_id":"sha256:f9ead29aeca9f646e8738e454b209aadda66cc408e1a5f2e2ceb6f8b955be5cb"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:NRYRLE4S3Q4XPYXDGRWZ7DWA4F","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Surface background suppression in liquid argon dark matter detectors using a newly discovered time component of tetraphenyl-butadiene scintillation","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.ins-det","authors_text":"Chris Stanford, Frank Calaprice, Jingke Xu, Shawn Westerdale","submitted_at":"2018-04-16T19:05:23Z","abstract_excerpt":"Decays of radioisotopes on inner detector surfaces can pose a major background concern for the direct detection of dark matter. While these backgrounds are conventionally mitigated with position cuts, these cuts reduce the exposure of the detector by decreasing the sensitive mass, and uncertainty in position determination may make it impossible to adequately remove such events in certain detectors. In this paper, we provide a new technique for substantially reducing these surface backgrounds in liquid argon (LAr) detectors, independent of position cuts. These detectors typically use a coating "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1804.06895","kind":"arxiv","version":4},"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":"2026-05-17T23:49:05Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"6twTVOeig7fp1AzpQcgJsfNUKFNBYW0chFS2OyjXwQ4Q4pweGDdlJzFV3aB5XFFpyEdti2uafOqEhHl/pl6qBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T22:22:29.767000Z"},"content_sha256":"19da80ceb192da2a0beac097564d791a8626b13c1c67b0e3ad332766aa7c8ccf","schema_version":"1.0","event_id":"sha256:19da80ceb192da2a0beac097564d791a8626b13c1c67b0e3ad332766aa7c8ccf"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/NRYRLE4S3Q4XPYXDGRWZ7DWA4F/bundle.json","state_url":"https://pith.science/pith/NRYRLE4S3Q4XPYXDGRWZ7DWA4F/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/NRYRLE4S3Q4XPYXDGRWZ7DWA4F/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":"2026-05-27T22:22:29Z","links":{"resolver":"https://pith.science/pith/NRYRLE4S3Q4XPYXDGRWZ7DWA4F","bundle":"https://pith.science/pith/NRYRLE4S3Q4XPYXDGRWZ7DWA4F/bundle.json","state":"https://pith.science/pith/NRYRLE4S3Q4XPYXDGRWZ7DWA4F/state.json","well_known_bundle":"https://pith.science/.well-known/pith/NRYRLE4S3Q4XPYXDGRWZ7DWA4F/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:NRYRLE4S3Q4XPYXDGRWZ7DWA4F","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":"f98c3de3e64b123a707761e6ac9dd0b565e3a1d67c7dd7eb73a33cf1ce801a01","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2018-04-16T19:05:23Z","title_canon_sha256":"259c3214afc51de644a8c30812278f7051ded581e7de7434fa750ac212d819f0"},"schema_version":"1.0","source":{"id":"1804.06895","kind":"arxiv","version":4}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1804.06895","created_at":"2026-05-17T23:49:05Z"},{"alias_kind":"arxiv_version","alias_value":"1804.06895v4","created_at":"2026-05-17T23:49:05Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1804.06895","created_at":"2026-05-17T23:49:05Z"},{"alias_kind":"pith_short_12","alias_value":"NRYRLE4S3Q4X","created_at":"2026-05-18T12:32:40Z"},{"alias_kind":"pith_short_16","alias_value":"NRYRLE4S3Q4XPYXD","created_at":"2026-05-18T12:32:40Z"},{"alias_kind":"pith_short_8","alias_value":"NRYRLE4S","created_at":"2026-05-18T12:32:40Z"}],"graph_snapshots":[{"event_id":"sha256:19da80ceb192da2a0beac097564d791a8626b13c1c67b0e3ad332766aa7c8ccf","target":"graph","created_at":"2026-05-17T23:49:05Z","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":"Decays of radioisotopes on inner detector surfaces can pose a major background concern for the direct detection of dark matter. While these backgrounds are conventionally mitigated with position cuts, these cuts reduce the exposure of the detector by decreasing the sensitive mass, and uncertainty in position determination may make it impossible to adequately remove such events in certain detectors. In this paper, we provide a new technique for substantially reducing these surface backgrounds in liquid argon (LAr) detectors, independent of position cuts. These detectors typically use a coating ","authors_text":"Chris Stanford, Frank Calaprice, Jingke Xu, Shawn Westerdale","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2018-04-16T19:05:23Z","title":"Surface background suppression in liquid argon dark matter detectors using a newly discovered time component of tetraphenyl-butadiene scintillation"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1804.06895","kind":"arxiv","version":4},"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:f9ead29aeca9f646e8738e454b209aadda66cc408e1a5f2e2ceb6f8b955be5cb","target":"record","created_at":"2026-05-17T23:49:05Z","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":"f98c3de3e64b123a707761e6ac9dd0b565e3a1d67c7dd7eb73a33cf1ce801a01","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2018-04-16T19:05:23Z","title_canon_sha256":"259c3214afc51de644a8c30812278f7051ded581e7de7434fa750ac212d819f0"},"schema_version":"1.0","source":{"id":"1804.06895","kind":"arxiv","version":4}},"canonical_sha256":"6c71159392dc3977e2e3346d9f8ec0e15ca5b6494eb5f20c6d708daa7369e663","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"6c71159392dc3977e2e3346d9f8ec0e15ca5b6494eb5f20c6d708daa7369e663","first_computed_at":"2026-05-17T23:49:05.844778Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:49:05.844778Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Bg0vagb9vghg4Cdzipb/J/7addGfE/PRoRKN05upCTi212rpao0rP58iHITbEBk3A5J9s/UMbHvbToLF8N7mDw==","signature_status":"signed_v1","signed_at":"2026-05-17T23:49:05.845420Z","signed_message":"canonical_sha256_bytes"},"source_id":"1804.06895","source_kind":"arxiv","source_version":4}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:f9ead29aeca9f646e8738e454b209aadda66cc408e1a5f2e2ceb6f8b955be5cb","sha256:19da80ceb192da2a0beac097564d791a8626b13c1c67b0e3ad332766aa7c8ccf"],"state_sha256":"b261fd768eadebac958433b0234a543e0079afe02fffbefcdcaef272ec262ec7"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Iz1YqaEILlwCskLuIDQ2SN35SrP2/H9sRDM2IWxKmlERlzhD6PCIjgwC7SPo++Xc4qcROSW0MwLww2uHgjcpAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T22:22:29.770181Z","bundle_sha256":"b76c817feb86442c82f79ecf8c67a7c3e1a312aab52fa2377a2ea89bf8f903b6"}}