{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:1997:COZYD3LGT5TDMGWFM6G54J4NYG","short_pith_number":"pith:COZYD3LG","canonical_record":{"source":{"id":"nucl-ex/9707007","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"nucl-ex","submitted_at":"1997-07-30T09:25:58Z","cross_cats_sorted":[],"title_canon_sha256":"ae3b44c7b4bb465ce59f3ef7fbc7ea0bf10177bea9d822167569997feaca0164","abstract_canon_sha256":"1ba0ac8bec4636a8077b03c5d243ada93b648378ae3ccfe0fb50050cc515f3e7"},"schema_version":"1.0"},"canonical_sha256":"13b381ed669f66361ac5678dde278dc191819abb24443158091354178e2c84ef","source":{"kind":"arxiv","id":"nucl-ex/9707007","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"nucl-ex/9707007","created_at":"2026-07-04T16:05:49Z"},{"alias_kind":"arxiv_version","alias_value":"nucl-ex/9707007v1","created_at":"2026-07-04T16:05:49Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.nucl-ex/9707007","created_at":"2026-07-04T16:05:49Z"},{"alias_kind":"pith_short_12","alias_value":"COZYD3LGT5TD","created_at":"2026-07-04T16:05:49Z"},{"alias_kind":"pith_short_16","alias_value":"COZYD3LGT5TDMGWF","created_at":"2026-07-04T16:05:49Z"},{"alias_kind":"pith_short_8","alias_value":"COZYD3LG","created_at":"2026-07-04T16:05:49Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:1997:COZYD3LGT5TDMGWFM6G54J4NYG","target":"record","payload":{"canonical_record":{"source":{"id":"nucl-ex/9707007","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"nucl-ex","submitted_at":"1997-07-30T09:25:58Z","cross_cats_sorted":[],"title_canon_sha256":"ae3b44c7b4bb465ce59f3ef7fbc7ea0bf10177bea9d822167569997feaca0164","abstract_canon_sha256":"1ba0ac8bec4636a8077b03c5d243ada93b648378ae3ccfe0fb50050cc515f3e7"},"schema_version":"1.0"},"canonical_sha256":"13b381ed669f66361ac5678dde278dc191819abb24443158091354178e2c84ef","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T16:05:49.507850Z","signature_b64":"NmXXRXOrCw6/wfaTe43Mawqj18nDXxyLYlqomW5gmZEnNKxUz5bZrN9Rw9nNWC5VOBtve3N2msU+/EH3haswDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"13b381ed669f66361ac5678dde278dc191819abb24443158091354178e2c84ef","last_reissued_at":"2026-07-04T16:05:49.507441Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T16:05:49.507441Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"nucl-ex/9707007","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":"2026-07-04T16:05:49Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"UGnF9jsvbkhrBwQY/CuY6nGFqCU+Q/ZfH+G2uW33E4lsdwzHXV9CbuEAgnfv4sP59rfQ7d4hZ+hdMXfU1Q+ZAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-05T02:20:38.138276Z"},"content_sha256":"4c122e117f5a38357d65e4328e221255bb74ee1edcebecf493c565762b9bbf0e","schema_version":"1.0","event_id":"sha256:4c122e117f5a38357d65e4328e221255bb74ee1edcebecf493c565762b9bbf0e"},{"event_type":"graph_snapshot","subject_pith_number":"pith:1997:COZYD3LGT5TDMGWFM6G54J4NYG","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Onset of Nuclear Matter Expansion in Au+Au Collisions","license":"","headline":"","cross_cats":[],"primary_cat":"nucl-ex","authors_text":"A. Gobbi, F. Rami, P. Crochet, R. Dona, the FOPI collaboration","submitted_at":"1997-07-30T09:25:58Z","abstract_excerpt":"Using the FOPI detector at GSI Darmstadt, excitation functions of collective flow components were measured for the Au+Au system, in the reaction plane and out of this plane, at seven incident energies ranging from 100AMeV to 800AMeV. The threshold energies, corresponding to the onset of sideward-flow (balance energy) and squeeze-out effect (transition energy), are extracted from extrapolations of these excitation functions toward lower beam energies for charged products with Z>2. The transition energy is found to be larger than the balance energy. The impact parameter dependence of both balanc"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"nucl-ex/9707007","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/nucl-ex/9707007/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":"2026-07-04T16:05:49Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"aI4mh6wiBs1MIpY0eEbwf/prUeFX0AtjDNzjPGu5zbFFd+Ge6JUt43bAEGUxTF4yAK5lOviBO/GzchtJJ+oUDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-05T02:20:38.138721Z"},"content_sha256":"6ddedc93cbb184ffd4085bf9eac7a7b97b4af9b2ed5a0075a45ee8a82884ac17","schema_version":"1.0","event_id":"sha256:6ddedc93cbb184ffd4085bf9eac7a7b97b4af9b2ed5a0075a45ee8a82884ac17"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/COZYD3LGT5TDMGWFM6G54J4NYG/bundle.json","state_url":"https://pith.science/pith/COZYD3LGT5TDMGWFM6G54J4NYG/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/COZYD3LGT5TDMGWFM6G54J4NYG/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":"2026-07-05T02:20:38Z","links":{"resolver":"https://pith.science/pith/COZYD3LGT5TDMGWFM6G54J4NYG","bundle":"https://pith.science/pith/COZYD3LGT5TDMGWFM6G54J4NYG/bundle.json","state":"https://pith.science/pith/COZYD3LGT5TDMGWFM6G54J4NYG/state.json","well_known_bundle":"https://pith.science/.well-known/pith/COZYD3LGT5TDMGWFM6G54J4NYG/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:1997:COZYD3LGT5TDMGWFM6G54J4NYG","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":"1ba0ac8bec4636a8077b03c5d243ada93b648378ae3ccfe0fb50050cc515f3e7","cross_cats_sorted":[],"license":"","primary_cat":"nucl-ex","submitted_at":"1997-07-30T09:25:58Z","title_canon_sha256":"ae3b44c7b4bb465ce59f3ef7fbc7ea0bf10177bea9d822167569997feaca0164"},"schema_version":"1.0","source":{"id":"nucl-ex/9707007","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"nucl-ex/9707007","created_at":"2026-07-04T16:05:49Z"},{"alias_kind":"arxiv_version","alias_value":"nucl-ex/9707007v1","created_at":"2026-07-04T16:05:49Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.nucl-ex/9707007","created_at":"2026-07-04T16:05:49Z"},{"alias_kind":"pith_short_12","alias_value":"COZYD3LGT5TD","created_at":"2026-07-04T16:05:49Z"},{"alias_kind":"pith_short_16","alias_value":"COZYD3LGT5TDMGWF","created_at":"2026-07-04T16:05:49Z"},{"alias_kind":"pith_short_8","alias_value":"COZYD3LG","created_at":"2026-07-04T16:05:49Z"}],"graph_snapshots":[{"event_id":"sha256:6ddedc93cbb184ffd4085bf9eac7a7b97b4af9b2ed5a0075a45ee8a82884ac17","target":"graph","created_at":"2026-07-04T16:05:49Z","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/nucl-ex/9707007/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Using the FOPI detector at GSI Darmstadt, excitation functions of collective flow components were measured for the Au+Au system, in the reaction plane and out of this plane, at seven incident energies ranging from 100AMeV to 800AMeV. The threshold energies, corresponding to the onset of sideward-flow (balance energy) and squeeze-out effect (transition energy), are extracted from extrapolations of these excitation functions toward lower beam energies for charged products with Z>2. The transition energy is found to be larger than the balance energy. The impact parameter dependence of both balanc","authors_text":"A. Gobbi, F. Rami, P. Crochet, R. Dona, the FOPI collaboration","cross_cats":[],"headline":"","license":"","primary_cat":"nucl-ex","submitted_at":"1997-07-30T09:25:58Z","title":"Onset of Nuclear Matter Expansion in Au+Au Collisions"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"nucl-ex/9707007","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":"sha256:4c122e117f5a38357d65e4328e221255bb74ee1edcebecf493c565762b9bbf0e","target":"record","created_at":"2026-07-04T16:05:49Z","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":"1ba0ac8bec4636a8077b03c5d243ada93b648378ae3ccfe0fb50050cc515f3e7","cross_cats_sorted":[],"license":"","primary_cat":"nucl-ex","submitted_at":"1997-07-30T09:25:58Z","title_canon_sha256":"ae3b44c7b4bb465ce59f3ef7fbc7ea0bf10177bea9d822167569997feaca0164"},"schema_version":"1.0","source":{"id":"nucl-ex/9707007","kind":"arxiv","version":1}},"canonical_sha256":"13b381ed669f66361ac5678dde278dc191819abb24443158091354178e2c84ef","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"13b381ed669f66361ac5678dde278dc191819abb24443158091354178e2c84ef","first_computed_at":"2026-07-04T16:05:49.507441Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T16:05:49.507441Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"NmXXRXOrCw6/wfaTe43Mawqj18nDXxyLYlqomW5gmZEnNKxUz5bZrN9Rw9nNWC5VOBtve3N2msU+/EH3haswDg==","signature_status":"signed_v1","signed_at":"2026-07-04T16:05:49.507850Z","signed_message":"canonical_sha256_bytes"},"source_id":"nucl-ex/9707007","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:4c122e117f5a38357d65e4328e221255bb74ee1edcebecf493c565762b9bbf0e","sha256:6ddedc93cbb184ffd4085bf9eac7a7b97b4af9b2ed5a0075a45ee8a82884ac17"],"state_sha256":"141f073627cc2e5df1cae535cbae2e978d661d0d8a57696871409dbaec7eb7bb"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"4oSQYEw8/cw+i9JlnhSP5lmZP0q94J6umLS7N0u2Qm0NG6+rlVb/2rELYjdcrp3K/QVIJH+kXlgAE6/Y7qW/Aw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-05T02:20:38.143780Z","bundle_sha256":"7f7a4a20a74899ade2f18341bb17f9ddd39cfcffdbf73411b84ac72defe79b07"}}