{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2020:VIH7TCZUDHCKR5HMS53R32JWIO","short_pith_number":"pith:VIH7TCZU","canonical_record":{"source":{"id":"2004.00913","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2020-04-02T10:03:35Z","cross_cats_sorted":[],"title_canon_sha256":"5512017ce6cc57993f4bb1a564d7beff70967658b37b3672ec0f5763d9fdea7c","abstract_canon_sha256":"7b3502603acfb1e6b9c7c8bdb65e13a8c7ca59d2782c338f3f64b0187b08b5af"},"schema_version":"1.0"},"canonical_sha256":"aa0ff98b3419c4a8f4ec97771de93643aaa3cdd5ddcd70fdf762d78934130365","source":{"kind":"arxiv","id":"2004.00913","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2004.00913","created_at":"2026-07-05T00:52:21Z"},{"alias_kind":"arxiv_version","alias_value":"2004.00913v1","created_at":"2026-07-05T00:52:21Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2004.00913","created_at":"2026-07-05T00:52:21Z"},{"alias_kind":"pith_short_12","alias_value":"VIH7TCZUDHCK","created_at":"2026-07-05T00:52:21Z"},{"alias_kind":"pith_short_16","alias_value":"VIH7TCZUDHCKR5HM","created_at":"2026-07-05T00:52:21Z"},{"alias_kind":"pith_short_8","alias_value":"VIH7TCZU","created_at":"2026-07-05T00:52:21Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2020:VIH7TCZUDHCKR5HMS53R32JWIO","target":"record","payload":{"canonical_record":{"source":{"id":"2004.00913","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2020-04-02T10:03:35Z","cross_cats_sorted":[],"title_canon_sha256":"5512017ce6cc57993f4bb1a564d7beff70967658b37b3672ec0f5763d9fdea7c","abstract_canon_sha256":"7b3502603acfb1e6b9c7c8bdb65e13a8c7ca59d2782c338f3f64b0187b08b5af"},"schema_version":"1.0"},"canonical_sha256":"aa0ff98b3419c4a8f4ec97771de93643aaa3cdd5ddcd70fdf762d78934130365","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T00:52:21.685457Z","signature_b64":"dbKNSYO6Os3LRlC9/b+EpRB3aoN+h6WYtd/EFBXDtU1dfikIfXR88F0IZhdCzUOWAS7xCE4N/K8pQupVmfsnCw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"aa0ff98b3419c4a8f4ec97771de93643aaa3cdd5ddcd70fdf762d78934130365","last_reissued_at":"2026-07-05T00:52:21.685026Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T00:52:21.685026Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2004.00913","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":"2026-07-05T00:52:21Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"yA6T6WZSdtYeAFXlJtGDOAdFFWdS3ET28rjTi2hVfHO1+3kTV4wLlbYjo6B8Bxz83sYoIiELUtU6Y6ouXqHIBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-04T04:47:01.161711Z"},"content_sha256":"3aca90c5738d1f807fd225f00197e3c111fb6478f0905749732eff95f070e446","schema_version":"1.0","event_id":"sha256:3aca90c5738d1f807fd225f00197e3c111fb6478f0905749732eff95f070e446"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2020:VIH7TCZUDHCKR5HMS53R32JWIO","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Status of the PANDA Barrel DIRC","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.ins-det","authors_text":"A. Ali, A. Belias, A. Gerhardt, A. Hayrapetyan, A. Lehmann, C. Schwarz, C. Sfienti, D. Lehmann, E. Etzelm\\\"uller, F. Uhlig, G. Schepers, I. K\\\"oseoglu, J. Rieke, J. Schwiening, K. F\\\"ohl, K. Kreutzfeld, K. Peters, L. Schmitt, M. B\\\"ohm, M. D\\\"uren, M. Krebs, M. Pfaffinger, M. Schmidt, M. Traxler, R. Dzhygadlo, S. Stelter, T. Wasem","submitted_at":"2020-04-02T10:03:35Z","abstract_excerpt":"The PANDA experiment will use cooled antiproton beams with high intensity stored1 in the High Energy Storage Ring at FAIR. Reactions on a fixed target producing charmed hadrons will shed light on the strong QCD. Three ring imaging Cherenkov counters are used for charged particle identification. The status of the Barrel DIRC (Detection of Internally Reflected Cherenkov light) is described. Its design is robust and its performance validated in experiments with test beams. The PANDA Barrel DIRC has entered the construction phase and will be installed in 2023/2024."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2004.00913","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2004.00913/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-05T00:52:21Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"/1153IaaLleGde6F+atsCvHpwfzcvl2EzlWTJMk+0JUpyyVnVnC966CwRJl7vGazpjxQ7VTA9dRXAGThhvyWAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-04T04:47:01.162153Z"},"content_sha256":"17792eceddd51fad03674f75dd1b20f257ba50b729976085b1b5df0bc85af9ed","schema_version":"1.0","event_id":"sha256:17792eceddd51fad03674f75dd1b20f257ba50b729976085b1b5df0bc85af9ed"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/VIH7TCZUDHCKR5HMS53R32JWIO/bundle.json","state_url":"https://pith.science/pith/VIH7TCZUDHCKR5HMS53R32JWIO/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/VIH7TCZUDHCKR5HMS53R32JWIO/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":"2026-08-04T04:47:01Z","links":{"resolver":"https://pith.science/pith/VIH7TCZUDHCKR5HMS53R32JWIO","bundle":"https://pith.science/pith/VIH7TCZUDHCKR5HMS53R32JWIO/bundle.json","state":"https://pith.science/pith/VIH7TCZUDHCKR5HMS53R32JWIO/state.json","well_known_bundle":"https://pith.science/.well-known/pith/VIH7TCZUDHCKR5HMS53R32JWIO/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:VIH7TCZUDHCKR5HMS53R32JWIO","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":"7b3502603acfb1e6b9c7c8bdb65e13a8c7ca59d2782c338f3f64b0187b08b5af","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2020-04-02T10:03:35Z","title_canon_sha256":"5512017ce6cc57993f4bb1a564d7beff70967658b37b3672ec0f5763d9fdea7c"},"schema_version":"1.0","source":{"id":"2004.00913","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2004.00913","created_at":"2026-07-05T00:52:21Z"},{"alias_kind":"arxiv_version","alias_value":"2004.00913v1","created_at":"2026-07-05T00:52:21Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2004.00913","created_at":"2026-07-05T00:52:21Z"},{"alias_kind":"pith_short_12","alias_value":"VIH7TCZUDHCK","created_at":"2026-07-05T00:52:21Z"},{"alias_kind":"pith_short_16","alias_value":"VIH7TCZUDHCKR5HM","created_at":"2026-07-05T00:52:21Z"},{"alias_kind":"pith_short_8","alias_value":"VIH7TCZU","created_at":"2026-07-05T00:52:21Z"}],"graph_snapshots":[{"event_id":"sha256:17792eceddd51fad03674f75dd1b20f257ba50b729976085b1b5df0bc85af9ed","target":"graph","created_at":"2026-07-05T00:52:21Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2004.00913/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The PANDA experiment will use cooled antiproton beams with high intensity stored1 in the High Energy Storage Ring at FAIR. Reactions on a fixed target producing charmed hadrons will shed light on the strong QCD. Three ring imaging Cherenkov counters are used for charged particle identification. The status of the Barrel DIRC (Detection of Internally Reflected Cherenkov light) is described. Its design is robust and its performance validated in experiments with test beams. The PANDA Barrel DIRC has entered the construction phase and will be installed in 2023/2024.","authors_text":"A. Ali, A. Belias, A. Gerhardt, A. Hayrapetyan, A. Lehmann, C. Schwarz, C. Sfienti, D. Lehmann, E. Etzelm\\\"uller, F. Uhlig, G. Schepers, I. K\\\"oseoglu, J. Rieke, J. Schwiening, K. F\\\"ohl, K. Kreutzfeld, K. Peters, L. Schmitt, M. B\\\"ohm, M. D\\\"uren, M. Krebs, M. Pfaffinger, M. Schmidt, M. Traxler, R. Dzhygadlo, S. Stelter, T. Wasem","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2020-04-02T10:03:35Z","title":"Status of the PANDA Barrel DIRC"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2004.00913","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":"sha256:3aca90c5738d1f807fd225f00197e3c111fb6478f0905749732eff95f070e446","target":"record","created_at":"2026-07-05T00:52:21Z","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":"7b3502603acfb1e6b9c7c8bdb65e13a8c7ca59d2782c338f3f64b0187b08b5af","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2020-04-02T10:03:35Z","title_canon_sha256":"5512017ce6cc57993f4bb1a564d7beff70967658b37b3672ec0f5763d9fdea7c"},"schema_version":"1.0","source":{"id":"2004.00913","kind":"arxiv","version":1}},"canonical_sha256":"aa0ff98b3419c4a8f4ec97771de93643aaa3cdd5ddcd70fdf762d78934130365","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"aa0ff98b3419c4a8f4ec97771de93643aaa3cdd5ddcd70fdf762d78934130365","first_computed_at":"2026-07-05T00:52:21.685026Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T00:52:21.685026Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"dbKNSYO6Os3LRlC9/b+EpRB3aoN+h6WYtd/EFBXDtU1dfikIfXR88F0IZhdCzUOWAS7xCE4N/K8pQupVmfsnCw==","signature_status":"signed_v1","signed_at":"2026-07-05T00:52:21.685457Z","signed_message":"canonical_sha256_bytes"},"source_id":"2004.00913","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:3aca90c5738d1f807fd225f00197e3c111fb6478f0905749732eff95f070e446","sha256:17792eceddd51fad03674f75dd1b20f257ba50b729976085b1b5df0bc85af9ed"],"state_sha256":"606fd5f484f57c04bd67ff5fa6633899424406fcc4c5f7a11e1b5441a2e0d56f"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"gVQhgnpxvx/461xgCUTgwvodpe1bnxLUA/HT+duCOo22NEsIOpuIhqqLtKw0d9Z8y9jAFjECP3W6UesfdufAAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-04T04:47:01.164597Z","bundle_sha256":"ddcc109c20f5075c4e25ab3f293983f3d1203cf3de3c6e05b044b109c6aad0fe"}}