{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:A7AWLTDY6YLODDIOBHSEU77DRD","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":"b779a287439e5a9d201b1c3ed78a18a75ed546b63860d2ad3194eac70fddd443","cross_cats_sorted":["hep-ex"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2013-04-23T02:03:48Z","title_canon_sha256":"892d2260ffff45dfe22055bf1986b036ce9daf7d12965bf67d2b45dd1e9daec5"},"schema_version":"1.0","source":{"id":"1304.6149","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1304.6149","created_at":"2026-05-18T03:05:54Z"},{"alias_kind":"arxiv_version","alias_value":"1304.6149v2","created_at":"2026-05-18T03:05:54Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1304.6149","created_at":"2026-05-18T03:05:54Z"},{"alias_kind":"pith_short_12","alias_value":"A7AWLTDY6YLO","created_at":"2026-05-18T12:27:38Z"},{"alias_kind":"pith_short_16","alias_value":"A7AWLTDY6YLODDIO","created_at":"2026-05-18T12:27:38Z"},{"alias_kind":"pith_short_8","alias_value":"A7AWLTDY","created_at":"2026-05-18T12:27:38Z"}],"graph_snapshots":[{"event_id":"sha256:e4a3432f1e342b11ae9544affe068708c254f188116022cd6e0b35a24d0d8c1b","target":"graph","created_at":"2026-05-18T03:05:54Z","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":"Based on real data, a new parameterized model of the Main Drift Chamber response is proposed. In this model, we tune the ratio of good hits and the residual distribution separately. The difference between simulation and data in track reconstruction efficiency reduces from 1% to 0.5%, and the momentum resolution agreement improves significantly.","authors_text":"An Fenfen, Gao Yuanning, He Kanglin, Jin Shan, Ji Xiaobin, Liu Huaimin, Liu Kai, Li Weidong, Li Weiguo, Shen Xiaoyan, Wang Yifang, Wu Linghui, Xiao Dong, Xu Qingnian, Yuan Ye, Zhang Rui, Zhang Yao, Zhao Guang, Zheng Yangheng","cross_cats":["hep-ex"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2013-04-23T02:03:48Z","title":"Improvement of Main Drift Chamber Monte-Carlo tuning model at BESIII"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1304.6149","kind":"arxiv","version":2},"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":"sha256:925e86833c5c8b2cb3fb938713587065bf4bb2a76e0f46381194a443674e36ca","target":"record","created_at":"2026-05-18T03:05:54Z","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":"b779a287439e5a9d201b1c3ed78a18a75ed546b63860d2ad3194eac70fddd443","cross_cats_sorted":["hep-ex"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2013-04-23T02:03:48Z","title_canon_sha256":"892d2260ffff45dfe22055bf1986b036ce9daf7d12965bf67d2b45dd1e9daec5"},"schema_version":"1.0","source":{"id":"1304.6149","kind":"arxiv","version":2}},"canonical_sha256":"07c165cc78f616e18d0e09e44a7fe388d34d2472d25d3fd581e76041207f3159","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"07c165cc78f616e18d0e09e44a7fe388d34d2472d25d3fd581e76041207f3159","first_computed_at":"2026-05-18T03:05:54.673752Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:05:54.673752Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"33pMrlg6sVXLBsPC0+ONrXdg47PgOFa5IQR7CHroSVYJBsm2HNiHSJsRsR6zpt6gl/aqsyE7qBmxjIqvY0ASDw==","signature_status":"signed_v1","signed_at":"2026-05-18T03:05:54.674308Z","signed_message":"canonical_sha256_bytes"},"source_id":"1304.6149","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:925e86833c5c8b2cb3fb938713587065bf4bb2a76e0f46381194a443674e36ca","sha256:e4a3432f1e342b11ae9544affe068708c254f188116022cd6e0b35a24d0d8c1b"],"state_sha256":"1ea76669c43568c68b91a5de9970a8b95868a19ccaaa6bfd3c48a04c33809ec8"}