{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:2ETIXX3BPEF37GJMAYPUSQ4EEC","short_pith_number":"pith:2ETIXX3B","canonical_record":{"source":{"id":"2101.02581","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"nucl-ex","submitted_at":"2021-01-07T15:15:03Z","cross_cats_sorted":["hep-ex"],"title_canon_sha256":"9f277bacdf6bcd56d4f0c2b3942899fe1474af5fb5e867817389083f6584d5b1","abstract_canon_sha256":"09caa914dc1c57656f3d4fad958febbaf8291e9fa635f5847c8038794a8ef9d0"},"schema_version":"1.0"},"canonical_sha256":"d1268bdf61790bbf992c061f494384208e04244cf947a0f38e791f5262256374","source":{"kind":"arxiv","id":"2101.02581","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2101.02581","created_at":"2026-07-05T03:08:23Z"},{"alias_kind":"arxiv_version","alias_value":"2101.02581v2","created_at":"2026-07-05T03:08:23Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2101.02581","created_at":"2026-07-05T03:08:23Z"},{"alias_kind":"pith_short_12","alias_value":"2ETIXX3BPEF3","created_at":"2026-07-05T03:08:23Z"},{"alias_kind":"pith_short_16","alias_value":"2ETIXX3BPEF37GJM","created_at":"2026-07-05T03:08:23Z"},{"alias_kind":"pith_short_8","alias_value":"2ETIXX3B","created_at":"2026-07-05T03:08:23Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:2ETIXX3BPEF37GJMAYPUSQ4EEC","target":"record","payload":{"canonical_record":{"source":{"id":"2101.02581","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"nucl-ex","submitted_at":"2021-01-07T15:15:03Z","cross_cats_sorted":["hep-ex"],"title_canon_sha256":"9f277bacdf6bcd56d4f0c2b3942899fe1474af5fb5e867817389083f6584d5b1","abstract_canon_sha256":"09caa914dc1c57656f3d4fad958febbaf8291e9fa635f5847c8038794a8ef9d0"},"schema_version":"1.0"},"canonical_sha256":"d1268bdf61790bbf992c061f494384208e04244cf947a0f38e791f5262256374","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T03:08:23.799453Z","signature_b64":"m6mYU19HRHE9Kmt3wIb53Krm7rh9O6z+3SNYqr6WbyAdq6ZbfNmbcXm+ydiMTIQasOKRN44znhqao6Ff1YAkBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d1268bdf61790bbf992c061f494384208e04244cf947a0f38e791f5262256374","last_reissued_at":"2026-07-05T03:08:23.799021Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T03:08:23.799021Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2101.02581","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T03:08:23Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"B4sTVBoccnFPmPDS3WXrAuieWA4IZ6BfmYuGpn2cFwuKtRiIAR+YZxYSIdnGpDmRtNsa0kjnxe8WPGp2nsQIDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-04T22:09:20.158364Z"},"content_sha256":"00f87be85cd0d6140457bc323730670aa656e5a534372ba213bcfbeb8e4d63bb","schema_version":"1.0","event_id":"sha256:00f87be85cd0d6140457bc323730670aa656e5a534372ba213bcfbeb8e4d63bb"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:2ETIXX3BPEF37GJMAYPUSQ4EEC","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"First measurement of coherent $\\rho^{0}$ photoproduction in ultra-peripheral Xe-Xe collisions at $\\mathbf{\\sqrt{s_{\\rm {\\scriptscriptstyle \\mathbf{NN}}}} = 5.44}$ TeV","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["hep-ex"],"primary_cat":"nucl-ex","authors_text":"ALICE Collaboration","submitted_at":"2021-01-07T15:15:03Z","abstract_excerpt":"The first measurement of the coherent photoproduction of $\\rho^{0}$ vector mesons in ultra-peripheral Xe-Xe collisions at $\\sqrt{s_{\\mathrm{\\rm NN}}}= 5.44$ TeV is presented. This result, together with previous HERA $\\gamma$p data and $\\gamma$-Pb measurements from ALICE, describes the atomic number ($A$) dependence of this process, which is particularly sensitive to nuclear shadowing effects and to the approach to the black-disc limit of QCD at a semi-hard scale. The cross section of the ${\\rm Xe}+{\\rm Xe} \\to \\rho^{0} + {\\rm Xe}+{\\rm Xe}$ process, measured at midrapidity through the decay cha"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2101.02581","kind":"arxiv","version":2},"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/2101.02581/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":"2026-07-05T03:08:23Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"sAsw9xh7BAwXJ4IeSGhiMyUP5nib6Q9lyIBhe/o50OyoR5Pn7Lzn2xxDWt54U1kLqdFAsVR6TMcSvWSh1fa9Bg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-04T22:09:20.158856Z"},"content_sha256":"854d7a422a9a75d604e8c73d62aa715110101e2d98df01b02bd29737beac24f4","schema_version":"1.0","event_id":"sha256:854d7a422a9a75d604e8c73d62aa715110101e2d98df01b02bd29737beac24f4"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/2ETIXX3BPEF37GJMAYPUSQ4EEC/bundle.json","state_url":"https://pith.science/pith/2ETIXX3BPEF37GJMAYPUSQ4EEC/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/2ETIXX3BPEF37GJMAYPUSQ4EEC/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":"2026-08-04T22:09:20Z","links":{"resolver":"https://pith.science/pith/2ETIXX3BPEF37GJMAYPUSQ4EEC","bundle":"https://pith.science/pith/2ETIXX3BPEF37GJMAYPUSQ4EEC/bundle.json","state":"https://pith.science/pith/2ETIXX3BPEF37GJMAYPUSQ4EEC/state.json","well_known_bundle":"https://pith.science/.well-known/pith/2ETIXX3BPEF37GJMAYPUSQ4EEC/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:2ETIXX3BPEF37GJMAYPUSQ4EEC","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":"09caa914dc1c57656f3d4fad958febbaf8291e9fa635f5847c8038794a8ef9d0","cross_cats_sorted":["hep-ex"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"nucl-ex","submitted_at":"2021-01-07T15:15:03Z","title_canon_sha256":"9f277bacdf6bcd56d4f0c2b3942899fe1474af5fb5e867817389083f6584d5b1"},"schema_version":"1.0","source":{"id":"2101.02581","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2101.02581","created_at":"2026-07-05T03:08:23Z"},{"alias_kind":"arxiv_version","alias_value":"2101.02581v2","created_at":"2026-07-05T03:08:23Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2101.02581","created_at":"2026-07-05T03:08:23Z"},{"alias_kind":"pith_short_12","alias_value":"2ETIXX3BPEF3","created_at":"2026-07-05T03:08:23Z"},{"alias_kind":"pith_short_16","alias_value":"2ETIXX3BPEF37GJM","created_at":"2026-07-05T03:08:23Z"},{"alias_kind":"pith_short_8","alias_value":"2ETIXX3B","created_at":"2026-07-05T03:08:23Z"}],"graph_snapshots":[{"event_id":"sha256:854d7a422a9a75d604e8c73d62aa715110101e2d98df01b02bd29737beac24f4","target":"graph","created_at":"2026-07-05T03:08:23Z","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/2101.02581/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The first measurement of the coherent photoproduction of $\\rho^{0}$ vector mesons in ultra-peripheral Xe-Xe collisions at $\\sqrt{s_{\\mathrm{\\rm NN}}}= 5.44$ TeV is presented. This result, together with previous HERA $\\gamma$p data and $\\gamma$-Pb measurements from ALICE, describes the atomic number ($A$) dependence of this process, which is particularly sensitive to nuclear shadowing effects and to the approach to the black-disc limit of QCD at a semi-hard scale. The cross section of the ${\\rm Xe}+{\\rm Xe} \\to \\rho^{0} + {\\rm Xe}+{\\rm Xe}$ process, measured at midrapidity through the decay cha","authors_text":"ALICE Collaboration","cross_cats":["hep-ex"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"nucl-ex","submitted_at":"2021-01-07T15:15:03Z","title":"First measurement of coherent $\\rho^{0}$ photoproduction in ultra-peripheral Xe-Xe collisions at $\\mathbf{\\sqrt{s_{\\rm {\\scriptscriptstyle \\mathbf{NN}}}} = 5.44}$ TeV"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2101.02581","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":"sha256:00f87be85cd0d6140457bc323730670aa656e5a534372ba213bcfbeb8e4d63bb","target":"record","created_at":"2026-07-05T03:08:23Z","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":"09caa914dc1c57656f3d4fad958febbaf8291e9fa635f5847c8038794a8ef9d0","cross_cats_sorted":["hep-ex"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"nucl-ex","submitted_at":"2021-01-07T15:15:03Z","title_canon_sha256":"9f277bacdf6bcd56d4f0c2b3942899fe1474af5fb5e867817389083f6584d5b1"},"schema_version":"1.0","source":{"id":"2101.02581","kind":"arxiv","version":2}},"canonical_sha256":"d1268bdf61790bbf992c061f494384208e04244cf947a0f38e791f5262256374","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d1268bdf61790bbf992c061f494384208e04244cf947a0f38e791f5262256374","first_computed_at":"2026-07-05T03:08:23.799021Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T03:08:23.799021Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"m6mYU19HRHE9Kmt3wIb53Krm7rh9O6z+3SNYqr6WbyAdq6ZbfNmbcXm+ydiMTIQasOKRN44znhqao6Ff1YAkBQ==","signature_status":"signed_v1","signed_at":"2026-07-05T03:08:23.799453Z","signed_message":"canonical_sha256_bytes"},"source_id":"2101.02581","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:00f87be85cd0d6140457bc323730670aa656e5a534372ba213bcfbeb8e4d63bb","sha256:854d7a422a9a75d604e8c73d62aa715110101e2d98df01b02bd29737beac24f4"],"state_sha256":"1a2b983e66ca96a7886f98d9157ffac8f7911a85af25d56b6f8a0e9ffca6ed72"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"6XsC90pYwAqBQbVtp71/0Tp58t4xHZUDoMbsLEUVgDFSi95gmAa2ko3fMxPc9YeC9M1JMGZSKtS1NBnfYwhiCQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-04T22:09:20.162761Z","bundle_sha256":"f7fbbc4793494f1d64814b01921e710d39f2661fea7eaad0024e13eb78f25dda"}}