{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:ZL4TPODW4QTLGMVKCTACBIUKKV","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":"83a7786eb7dcf5b8ef70206a143ed54152e0432530e10897aec18c9b1b6f7092","cross_cats_sorted":["hep-ex"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2014-08-19T08:33:58Z","title_canon_sha256":"7894b01d603df7e13a8dff0563fdc741b38d00902807c3db18528b21b16caff3"},"schema_version":"1.0","source":{"id":"1408.4246","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1408.4246","created_at":"2026-05-18T01:25:03Z"},{"alias_kind":"arxiv_version","alias_value":"1408.4246v1","created_at":"2026-05-18T01:25:03Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1408.4246","created_at":"2026-05-18T01:25:03Z"},{"alias_kind":"pith_short_12","alias_value":"ZL4TPODW4QTL","created_at":"2026-05-18T12:28:59Z"},{"alias_kind":"pith_short_16","alias_value":"ZL4TPODW4QTLGMVK","created_at":"2026-05-18T12:28:59Z"},{"alias_kind":"pith_short_8","alias_value":"ZL4TPODW","created_at":"2026-05-18T12:28:59Z"}],"graph_snapshots":[{"event_id":"sha256:c864a6ce0c7d5495ac6d1ec9c404517355399556552cd18a2159395c5db013ce","target":"graph","created_at":"2026-05-18T01:25:03Z","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 Preshower (PSh) detector is a component of the DIRAC setup. It is designed to improve rejection efficiency of e-e+ pairs background in the {\\pi}{\\pi} and K{\\pi} pair measurement. To increase the overall efficiency, a new two-layer structure scintillator Preshower detector has been realized in the region where the Nitrogen Cherenkov detector has been shortened to introduce new detectors. The new Preshower-Cherenkov combination ensures the electron rejection efficiency better than 99.9% in momentum region 1-7 GeV/c.","authors_text":"D.Dumitriu, D.Fluerasu, M.Gugiu, M.Pentia, S.Aogaki, V.Yazkov","cross_cats":["hep-ex"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2014-08-19T08:33:58Z","title":"New Preshower detector for DIRAC Experiment"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1408.4246","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:ed5aa49e6c92f9e5e90cb6c30c9649aab2446785da86853f1f2225bf7735d38d","target":"record","created_at":"2026-05-18T01:25:03Z","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":"83a7786eb7dcf5b8ef70206a143ed54152e0432530e10897aec18c9b1b6f7092","cross_cats_sorted":["hep-ex"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2014-08-19T08:33:58Z","title_canon_sha256":"7894b01d603df7e13a8dff0563fdc741b38d00902807c3db18528b21b16caff3"},"schema_version":"1.0","source":{"id":"1408.4246","kind":"arxiv","version":1}},"canonical_sha256":"caf937b876e426b332aa14c020a28a556754ba3172f98987cc5743fd7c53bfb2","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"caf937b876e426b332aa14c020a28a556754ba3172f98987cc5743fd7c53bfb2","first_computed_at":"2026-05-18T01:25:03.204724Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:25:03.204724Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"NRaVbWqxCCtGQFw7pd7XVkcOf+VAY2xRB5MZQwbC4/PvKUfVdo2FyPWTPWPOaT16vjPu/ZVhjUgrwYnMO8W5CA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:25:03.205450Z","signed_message":"canonical_sha256_bytes"},"source_id":"1408.4246","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:ed5aa49e6c92f9e5e90cb6c30c9649aab2446785da86853f1f2225bf7735d38d","sha256:c864a6ce0c7d5495ac6d1ec9c404517355399556552cd18a2159395c5db013ce"],"state_sha256":"1335bc962b7bf5cc7700919fd032292e48d9e61e26a4e15b422b88da5bd7f1c2"}