{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2024:DOEZQHUHFH44GSVKYOH6G23BDW","short_pith_number":"pith:DOEZQHUH","canonical_record":{"source":{"id":"2407.08574","kind":"arxiv","version":3},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"nucl-ex","submitted_at":"2024-07-11T15:01:31Z","cross_cats_sorted":["physics.med-ph","quant-ph"],"title_canon_sha256":"89cdfea0f91942b1f11b5d5bdcdd4a933e61806fd2fc021aa7aa6a342f000450","abstract_canon_sha256":"2a133dc8b9d14273cb4a9d00da1d09e19d2245e210f268799acf5e03fd71af3e"},"schema_version":"1.0"},"canonical_sha256":"1b89981e8729f9c34aaac38fe36b611d87c64eb107269f4a3dd6e9d934043e5e","source":{"kind":"arxiv","id":"2407.08574","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2407.08574","created_at":"2026-07-05T10:45:53Z"},{"alias_kind":"arxiv_version","alias_value":"2407.08574v3","created_at":"2026-07-05T10:45:53Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2407.08574","created_at":"2026-07-05T10:45:53Z"},{"alias_kind":"pith_short_12","alias_value":"DOEZQHUHFH44","created_at":"2026-07-05T10:45:53Z"},{"alias_kind":"pith_short_16","alias_value":"DOEZQHUHFH44GSVK","created_at":"2026-07-05T10:45:53Z"},{"alias_kind":"pith_short_8","alias_value":"DOEZQHUH","created_at":"2026-07-05T10:45:53Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2024:DOEZQHUHFH44GSVKYOH6G23BDW","target":"record","payload":{"canonical_record":{"source":{"id":"2407.08574","kind":"arxiv","version":3},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"nucl-ex","submitted_at":"2024-07-11T15:01:31Z","cross_cats_sorted":["physics.med-ph","quant-ph"],"title_canon_sha256":"89cdfea0f91942b1f11b5d5bdcdd4a933e61806fd2fc021aa7aa6a342f000450","abstract_canon_sha256":"2a133dc8b9d14273cb4a9d00da1d09e19d2245e210f268799acf5e03fd71af3e"},"schema_version":"1.0"},"canonical_sha256":"1b89981e8729f9c34aaac38fe36b611d87c64eb107269f4a3dd6e9d934043e5e","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T10:45:53.897005Z","signature_b64":"4dqPm+tW4aMFefAHWLzMEFVGZZER/2vCaGnK1I8hcZSwmggDfEVFwwuvQXIGI2SAAyFWtfLUDBl2QF1msXg2Bg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"1b89981e8729f9c34aaac38fe36b611d87c64eb107269f4a3dd6e9d934043e5e","last_reissued_at":"2026-07-05T10:45:53.896576Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T10:45:53.896576Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2407.08574","source_version":3,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T10:45:53Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"J+l4PtxvPChQGnfdtN3XssaiZhQsCnHiUHZe0WFLwhcYqhvtLiGk3aCVh7DCKoCF+AwA7HOSKRZ9ACD2CQh1Aw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-20T13:05:45.620740Z"},"content_sha256":"36555aabba362f4ad6a9d1a45ca97bbd1d3e0ac077ea755b5bb30e3adc423044","schema_version":"1.0","event_id":"sha256:36555aabba362f4ad6a9d1a45ca97bbd1d3e0ac077ea755b5bb30e3adc423044"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2024:DOEZQHUHFH44GSVKYOH6G23BDW","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Non-maximal entanglement of photons from positron-electron annihilation demonstrated using a novel plastic PET scanner","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["physics.med-ph","quant-ph"],"primary_cat":"nucl-ex","authors_text":"A. Coussat, B. Jasinska, C. Curceanu, D. Kumar, E. Czerwinski, E. Lisowski, E. L. Stepien, E.P. del Rio, E.Y. Beyene, F. Lisowski, K. Dulski, K. Kacprzak, K. Tayefi Ardebili, K. Valsan Eliyan, L. Kaplon, M. Das, M. Gorgol, M. Radler, M. Skurzok, N. Chug, P. Moskal, P. Tanty, S. Niedzwiecki, S. Parzych, S. Sharma, T. Kaplanoglu, T. Kozik, W. Mryka","submitted_at":"2024-07-11T15:01:31Z","abstract_excerpt":"In state-of-the-art Positron Emission Tomography (PET), information about annihilation photon polarization is unavailable. Here, we present a PET scanner built from plastic scintillators, where annihilation photons primarily interact via the Compton effect, providing information about both photon polarization and propagation direction. Using this plastic-based PET, we determined the distribution of the relative angle between polarization planes of photons from positron-electron annihilation in a porous polymer. The amplitude of the observed distribution is smaller than predicted for maximally "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2407.08574","kind":"arxiv","version":3},"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/2407.08574/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":"2026-07-05T10:45:53Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"nS/b0dzzob9rtM1iFi5ebUfqsydkv5Qt5I++xBxtBTktO5V8m+bJrZu4eJeI+uxIE2uO0wkCBmYPwPrNaBznBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-20T13:05:45.621300Z"},"content_sha256":"a8d3281ff91747f936bef45d8319acf84f639aaf60c3e2fbfc4008117a8e9a9e","schema_version":"1.0","event_id":"sha256:a8d3281ff91747f936bef45d8319acf84f639aaf60c3e2fbfc4008117a8e9a9e"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/DOEZQHUHFH44GSVKYOH6G23BDW/bundle.json","state_url":"https://pith.science/pith/DOEZQHUHFH44GSVKYOH6G23BDW/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/DOEZQHUHFH44GSVKYOH6G23BDW/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":"2026-08-20T13:05:45Z","links":{"resolver":"https://pith.science/pith/DOEZQHUHFH44GSVKYOH6G23BDW","bundle":"https://pith.science/pith/DOEZQHUHFH44GSVKYOH6G23BDW/bundle.json","state":"https://pith.science/pith/DOEZQHUHFH44GSVKYOH6G23BDW/state.json","well_known_bundle":"https://pith.science/.well-known/pith/DOEZQHUHFH44GSVKYOH6G23BDW/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2024:DOEZQHUHFH44GSVKYOH6G23BDW","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":"2a133dc8b9d14273cb4a9d00da1d09e19d2245e210f268799acf5e03fd71af3e","cross_cats_sorted":["physics.med-ph","quant-ph"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"nucl-ex","submitted_at":"2024-07-11T15:01:31Z","title_canon_sha256":"89cdfea0f91942b1f11b5d5bdcdd4a933e61806fd2fc021aa7aa6a342f000450"},"schema_version":"1.0","source":{"id":"2407.08574","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2407.08574","created_at":"2026-07-05T10:45:53Z"},{"alias_kind":"arxiv_version","alias_value":"2407.08574v3","created_at":"2026-07-05T10:45:53Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2407.08574","created_at":"2026-07-05T10:45:53Z"},{"alias_kind":"pith_short_12","alias_value":"DOEZQHUHFH44","created_at":"2026-07-05T10:45:53Z"},{"alias_kind":"pith_short_16","alias_value":"DOEZQHUHFH44GSVK","created_at":"2026-07-05T10:45:53Z"},{"alias_kind":"pith_short_8","alias_value":"DOEZQHUH","created_at":"2026-07-05T10:45:53Z"}],"graph_snapshots":[{"event_id":"sha256:a8d3281ff91747f936bef45d8319acf84f639aaf60c3e2fbfc4008117a8e9a9e","target":"graph","created_at":"2026-07-05T10:45:53Z","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/2407.08574/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"In state-of-the-art Positron Emission Tomography (PET), information about annihilation photon polarization is unavailable. Here, we present a PET scanner built from plastic scintillators, where annihilation photons primarily interact via the Compton effect, providing information about both photon polarization and propagation direction. Using this plastic-based PET, we determined the distribution of the relative angle between polarization planes of photons from positron-electron annihilation in a porous polymer. The amplitude of the observed distribution is smaller than predicted for maximally ","authors_text":"A. Coussat, B. Jasinska, C. Curceanu, D. Kumar, E. Czerwinski, E. Lisowski, E. L. Stepien, E.P. del Rio, E.Y. Beyene, F. Lisowski, K. Dulski, K. Kacprzak, K. Tayefi Ardebili, K. Valsan Eliyan, L. Kaplon, M. Das, M. Gorgol, M. Radler, M. Skurzok, N. Chug, P. Moskal, P. Tanty, S. Niedzwiecki, S. Parzych, S. Sharma, T. Kaplanoglu, T. Kozik, W. Mryka","cross_cats":["physics.med-ph","quant-ph"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"nucl-ex","submitted_at":"2024-07-11T15:01:31Z","title":"Non-maximal entanglement of photons from positron-electron annihilation demonstrated using a novel plastic PET scanner"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2407.08574","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":"sha256:36555aabba362f4ad6a9d1a45ca97bbd1d3e0ac077ea755b5bb30e3adc423044","target":"record","created_at":"2026-07-05T10:45:53Z","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":"2a133dc8b9d14273cb4a9d00da1d09e19d2245e210f268799acf5e03fd71af3e","cross_cats_sorted":["physics.med-ph","quant-ph"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"nucl-ex","submitted_at":"2024-07-11T15:01:31Z","title_canon_sha256":"89cdfea0f91942b1f11b5d5bdcdd4a933e61806fd2fc021aa7aa6a342f000450"},"schema_version":"1.0","source":{"id":"2407.08574","kind":"arxiv","version":3}},"canonical_sha256":"1b89981e8729f9c34aaac38fe36b611d87c64eb107269f4a3dd6e9d934043e5e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"1b89981e8729f9c34aaac38fe36b611d87c64eb107269f4a3dd6e9d934043e5e","first_computed_at":"2026-07-05T10:45:53.896576Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T10:45:53.896576Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"4dqPm+tW4aMFefAHWLzMEFVGZZER/2vCaGnK1I8hcZSwmggDfEVFwwuvQXIGI2SAAyFWtfLUDBl2QF1msXg2Bg==","signature_status":"signed_v1","signed_at":"2026-07-05T10:45:53.897005Z","signed_message":"canonical_sha256_bytes"},"source_id":"2407.08574","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:36555aabba362f4ad6a9d1a45ca97bbd1d3e0ac077ea755b5bb30e3adc423044","sha256:a8d3281ff91747f936bef45d8319acf84f639aaf60c3e2fbfc4008117a8e9a9e"],"state_sha256":"23111a369b799548eb2e131bb01bb70024715ff3d8f6594bcc39af81b73ddd92"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"gllsIB12SdbpQq6RfxE1JLO7jWhIxWxtl0kQtub3nBNy9HEbsUJbrekM5YLxu64xX6mpwuutBKrMhyDx/91jAQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-20T13:05:45.626882Z","bundle_sha256":"e9a3502924bc55183a1dcad31659241a256183b8e9868630745a89e2efa40d21"}}