{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:TM67QTPDFJ4JDIQJCVHY4CK2OK","short_pith_number":"pith:TM67QTPD","canonical_record":{"source":{"id":"1807.00500","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2018-07-02T07:34:07Z","cross_cats_sorted":["hep-ex"],"title_canon_sha256":"5cb66b3727d51be0877a194b84a3a9b03b76317e8460916233223a9db4b65a08","abstract_canon_sha256":"9e0f9b4dda4662190b9afd53febadaa43e25b3d88d948ac34ec96413b84de1f2"},"schema_version":"1.0"},"canonical_sha256":"9b3df84de32a7891a209154f8e095a7280fc53fdb6b8712c05e6e357873bc7ec","source":{"kind":"arxiv","id":"1807.00500","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1807.00500","created_at":"2026-05-18T00:11:52Z"},{"alias_kind":"arxiv_version","alias_value":"1807.00500v1","created_at":"2026-05-18T00:11:52Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1807.00500","created_at":"2026-05-18T00:11:52Z"},{"alias_kind":"pith_short_12","alias_value":"TM67QTPDFJ4J","created_at":"2026-05-18T12:32:53Z"},{"alias_kind":"pith_short_16","alias_value":"TM67QTPDFJ4JDIQJ","created_at":"2026-05-18T12:32:53Z"},{"alias_kind":"pith_short_8","alias_value":"TM67QTPD","created_at":"2026-05-18T12:32:53Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:TM67QTPDFJ4JDIQJCVHY4CK2OK","target":"record","payload":{"canonical_record":{"source":{"id":"1807.00500","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2018-07-02T07:34:07Z","cross_cats_sorted":["hep-ex"],"title_canon_sha256":"5cb66b3727d51be0877a194b84a3a9b03b76317e8460916233223a9db4b65a08","abstract_canon_sha256":"9e0f9b4dda4662190b9afd53febadaa43e25b3d88d948ac34ec96413b84de1f2"},"schema_version":"1.0"},"canonical_sha256":"9b3df84de32a7891a209154f8e095a7280fc53fdb6b8712c05e6e357873bc7ec","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:11:52.415294Z","signature_b64":"d0zyq2sJr34KUwQBjlxH81Mqd2O241ciWRLDuJeDFrMwYqrVaQqq1bLQH9OM8wZHDlpoOUMitPwg23YPkUsNBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"9b3df84de32a7891a209154f8e095a7280fc53fdb6b8712c05e6e357873bc7ec","last_reissued_at":"2026-05-18T00:11:52.414652Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:11:52.414652Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1807.00500","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":"2026-05-18T00:11:52Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"pQ60bKR4Y7249GrF80H2mV+a9esaNM23+Qhyyz+YH6Zy/q5vLV5Ih7YdGcPqPiiGrRftRwea8I7UN3SysUB5Dg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T22:30:55.383745Z"},"content_sha256":"dd442e4fb01a7c30da6e980a6dc823e5e9cef018cf173896da0d87f150703566","schema_version":"1.0","event_id":"sha256:dd442e4fb01a7c30da6e980a6dc823e5e9cef018cf173896da0d87f150703566"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:TM67QTPDFJ4JDIQJCVHY4CK2OK","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A Cylindrical GEM Inner Tracker for the BESIII experiment at IHEP","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["hep-ex"],"primary_cat":"physics.ins-det","authors_text":"A. Amoroso, A. Calcaterra, A. Cotta Ramusino, A. Rivetti, C. Leng, D. Bettoni, D. Jing, E. Fioravanti, E. Soldani, F. Bianchi, F. Cossio, F. De Mori, F. Evangelisti, G. Cibinetto, G. Felici, G. Mezzadri, G. Morello, H. Li, I. Garzia, J. Chai, J. Pellegrino, L. Fava, L. Lavezzi, L. Yang, M. Alexeev, M. Bertani, M. Destefanis, M. D. Rolo, M. Gatta, M. Greco, M. Maggiora, M. Melchiorri, M. Savrie, M. Scodeggio, N. Canale, P. Patteri, R. Farinelli, R. Malaguti, S. Cerioni, S. Chiozzi, S. Marcello, S. Pacetti, S. Sosio, S. Spataro, T. Edisher, V. Carassiti","submitted_at":"2018-07-02T07:34:07Z","abstract_excerpt":"The Beijing Electron Spectrometer III (BESIII) is a multipurpose detector that collects data provided by the collision in the Beijing Electron Positron Collider II (BEPCII), hosted at the Institute of High Energy Physics of Beijing. Since the beginning of its operation, BESIII has collected the world largest sample of J/{\\psi} and {\\psi}(2s). Due to the increase of the luminosity up to its nominal value of 10^33 cm-2 s-1 and aging effect, the MDC decreases its efficiency in the first layers up to 35% with respect to the value in 2014. Since BESIII has to take data up to 2022 with the chance to"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1807.00500","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":"2026-05-18T00:11:52Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"/0/+pNyt0u6+bdC+FVYCRaPR0ag4Ow6HRs974k/+2Kh3QJLcG5cMbR/syxWCb5YCKturbz0xNgggvpqKX0APBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T22:30:55.384135Z"},"content_sha256":"b8e83fe5fee45e15a41a77179f1874aba83ae7710a1c119b409e552df512750e","schema_version":"1.0","event_id":"sha256:b8e83fe5fee45e15a41a77179f1874aba83ae7710a1c119b409e552df512750e"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/TM67QTPDFJ4JDIQJCVHY4CK2OK/bundle.json","state_url":"https://pith.science/pith/TM67QTPDFJ4JDIQJCVHY4CK2OK/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/TM67QTPDFJ4JDIQJCVHY4CK2OK/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":"2026-06-03T22:30:55Z","links":{"resolver":"https://pith.science/pith/TM67QTPDFJ4JDIQJCVHY4CK2OK","bundle":"https://pith.science/pith/TM67QTPDFJ4JDIQJCVHY4CK2OK/bundle.json","state":"https://pith.science/pith/TM67QTPDFJ4JDIQJCVHY4CK2OK/state.json","well_known_bundle":"https://pith.science/.well-known/pith/TM67QTPDFJ4JDIQJCVHY4CK2OK/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:TM67QTPDFJ4JDIQJCVHY4CK2OK","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":"9e0f9b4dda4662190b9afd53febadaa43e25b3d88d948ac34ec96413b84de1f2","cross_cats_sorted":["hep-ex"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2018-07-02T07:34:07Z","title_canon_sha256":"5cb66b3727d51be0877a194b84a3a9b03b76317e8460916233223a9db4b65a08"},"schema_version":"1.0","source":{"id":"1807.00500","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1807.00500","created_at":"2026-05-18T00:11:52Z"},{"alias_kind":"arxiv_version","alias_value":"1807.00500v1","created_at":"2026-05-18T00:11:52Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1807.00500","created_at":"2026-05-18T00:11:52Z"},{"alias_kind":"pith_short_12","alias_value":"TM67QTPDFJ4J","created_at":"2026-05-18T12:32:53Z"},{"alias_kind":"pith_short_16","alias_value":"TM67QTPDFJ4JDIQJ","created_at":"2026-05-18T12:32:53Z"},{"alias_kind":"pith_short_8","alias_value":"TM67QTPD","created_at":"2026-05-18T12:32:53Z"}],"graph_snapshots":[{"event_id":"sha256:b8e83fe5fee45e15a41a77179f1874aba83ae7710a1c119b409e552df512750e","target":"graph","created_at":"2026-05-18T00:11:52Z","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 Beijing Electron Spectrometer III (BESIII) is a multipurpose detector that collects data provided by the collision in the Beijing Electron Positron Collider II (BEPCII), hosted at the Institute of High Energy Physics of Beijing. Since the beginning of its operation, BESIII has collected the world largest sample of J/{\\psi} and {\\psi}(2s). Due to the increase of the luminosity up to its nominal value of 10^33 cm-2 s-1 and aging effect, the MDC decreases its efficiency in the first layers up to 35% with respect to the value in 2014. Since BESIII has to take data up to 2022 with the chance to","authors_text":"A. Amoroso, A. Calcaterra, A. Cotta Ramusino, A. Rivetti, C. Leng, D. Bettoni, D. Jing, E. Fioravanti, E. Soldani, F. Bianchi, F. Cossio, F. De Mori, F. Evangelisti, G. Cibinetto, G. Felici, G. Mezzadri, G. Morello, H. Li, I. Garzia, J. Chai, J. Pellegrino, L. Fava, L. Lavezzi, L. Yang, M. Alexeev, M. Bertani, M. Destefanis, M. D. Rolo, M. Gatta, M. Greco, M. Maggiora, M. Melchiorri, M. Savrie, M. Scodeggio, N. Canale, P. Patteri, R. Farinelli, R. Malaguti, S. Cerioni, S. Chiozzi, S. Marcello, S. Pacetti, S. Sosio, S. Spataro, T. Edisher, V. Carassiti","cross_cats":["hep-ex"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2018-07-02T07:34:07Z","title":"A Cylindrical GEM Inner Tracker for the BESIII experiment at IHEP"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1807.00500","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:dd442e4fb01a7c30da6e980a6dc823e5e9cef018cf173896da0d87f150703566","target":"record","created_at":"2026-05-18T00:11:52Z","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":"9e0f9b4dda4662190b9afd53febadaa43e25b3d88d948ac34ec96413b84de1f2","cross_cats_sorted":["hep-ex"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2018-07-02T07:34:07Z","title_canon_sha256":"5cb66b3727d51be0877a194b84a3a9b03b76317e8460916233223a9db4b65a08"},"schema_version":"1.0","source":{"id":"1807.00500","kind":"arxiv","version":1}},"canonical_sha256":"9b3df84de32a7891a209154f8e095a7280fc53fdb6b8712c05e6e357873bc7ec","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"9b3df84de32a7891a209154f8e095a7280fc53fdb6b8712c05e6e357873bc7ec","first_computed_at":"2026-05-18T00:11:52.414652Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:11:52.414652Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"d0zyq2sJr34KUwQBjlxH81Mqd2O241ciWRLDuJeDFrMwYqrVaQqq1bLQH9OM8wZHDlpoOUMitPwg23YPkUsNBA==","signature_status":"signed_v1","signed_at":"2026-05-18T00:11:52.415294Z","signed_message":"canonical_sha256_bytes"},"source_id":"1807.00500","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:dd442e4fb01a7c30da6e980a6dc823e5e9cef018cf173896da0d87f150703566","sha256:b8e83fe5fee45e15a41a77179f1874aba83ae7710a1c119b409e552df512750e"],"state_sha256":"0dac820fde7c1dfc363048964b9ad25eeb9fc857922ef2288abe233435da3ed0"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"mQMzh8ePtV0/6NPwbKNJy9tCDkA6kIPuSdF3axg9v4FtooMGxsGT9bp8hh1xu6D4KI6Lksi0rpnWEaQbcpFRAQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-03T22:30:55.386338Z","bundle_sha256":"8b281d6279cf6a672069133f5ab1a4868f71a316e0755f8cb46edd4edafd8f0d"}}