{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:OCI3IZHVAX6P7GCZHC6BRA3EGM","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":"0ac60a72ee08762cd53e07b2ccdd3b156a974a6b4fb7041715af48b8289c98ca","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ex","submitted_at":"2015-04-29T14:23:09Z","title_canon_sha256":"2f586c4dbe9d2a1348cfbe3d14bbcaa777b320be9bde37e5d1408a9f78f0538c"},"schema_version":"1.0","source":{"id":"1504.07870","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1504.07870","created_at":"2026-05-18T00:04:14Z"},{"alias_kind":"arxiv_version","alias_value":"1504.07870v3","created_at":"2026-05-18T00:04:14Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1504.07870","created_at":"2026-05-18T00:04:14Z"},{"alias_kind":"pith_short_12","alias_value":"OCI3IZHVAX6P","created_at":"2026-05-18T12:29:34Z"},{"alias_kind":"pith_short_16","alias_value":"OCI3IZHVAX6P7GCZ","created_at":"2026-05-18T12:29:34Z"},{"alias_kind":"pith_short_8","alias_value":"OCI3IZHV","created_at":"2026-05-18T12:29:34Z"}],"graph_snapshots":[{"event_id":"sha256:e396add9062f172688c2f111d244041cc3fd45a7e52d578d01e094721172347c","target":"graph","created_at":"2026-05-18T00:04:14Z","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":"We study the photon detection efficiency and position resolution of the electromagnetic calorimeter (EMC) of the BESIII experiment. The control sample of the initial-state-radiation (ISR) process of $e^+e^-\\rightarrow \\gamma \\mu^+\\mu^-$ is used at $J/\\psi$ and $\\psi(3770)$ resonances for the EMC calibration and photon detection efficiency study. Photon detection efficiency is defined as the predicted photon, obtained by performing a kinematic fit with two muon tracks, matched with real photons in the EMC. The spatial resolution of the EMC is defined as the separation in polar ($\\theta$) and az","authors_text":"Chunxiu Liu, Huaimin Liu, Vindhyawasini Prasad, Weidong Li, Xiaobin Ji, Xinchou Lou","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ex","submitted_at":"2015-04-29T14:23:09Z","title":"Study of photon detection efficiency and position resolution of BESIII electromagnetic calorimeter"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1504.07870","kind":"arxiv","version":3},"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":"sha256:703bd42e73c3f5690614b6e5966800ea16e436943f1f106cf1864490297528db","target":"record","created_at":"2026-05-18T00:04:14Z","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":"0ac60a72ee08762cd53e07b2ccdd3b156a974a6b4fb7041715af48b8289c98ca","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ex","submitted_at":"2015-04-29T14:23:09Z","title_canon_sha256":"2f586c4dbe9d2a1348cfbe3d14bbcaa777b320be9bde37e5d1408a9f78f0538c"},"schema_version":"1.0","source":{"id":"1504.07870","kind":"arxiv","version":3}},"canonical_sha256":"7091b464f505fcff985938bc18836433167571619018eed9b44e90068c8ed361","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"7091b464f505fcff985938bc18836433167571619018eed9b44e90068c8ed361","first_computed_at":"2026-05-18T00:04:14.013647Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:04:14.013647Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Rzbu3MiZYPriymZl7nvZTDhjmJV2O/dB+Slx3gDlrAGprWrYlZ3bBKn5GRZm6IpnfCC/+amQIBWH0THG1fpTBg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:04:14.014620Z","signed_message":"canonical_sha256_bytes"},"source_id":"1504.07870","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:703bd42e73c3f5690614b6e5966800ea16e436943f1f106cf1864490297528db","sha256:e396add9062f172688c2f111d244041cc3fd45a7e52d578d01e094721172347c"],"state_sha256":"d550c0168f6456232cf0e969602e6412de31e4dd4599934e5783b5e645cfd578"}