{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:C7JU53KW77WFZ4VYW3VQYTDI3M","short_pith_number":"pith:C7JU53KW","canonical_record":{"source":{"id":"2107.13384","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"nucl-th","submitted_at":"2021-07-28T14:21:27Z","cross_cats_sorted":[],"title_canon_sha256":"24ebe018bcac0632ebc05511f7dd8ada3df9b1f8fd81278c61d3607515791520","abstract_canon_sha256":"42e07fc5fe8e11a877bba9dfb78265a9c6cfefa248c7466e028be60c9531d506"},"schema_version":"1.0"},"canonical_sha256":"17d34eed56ffec5cf2b8b6eb0c4c68db211b7d993a72739793e7b2571c83693f","source":{"kind":"arxiv","id":"2107.13384","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2107.13384","created_at":"2026-07-05T04:23:36Z"},{"alias_kind":"arxiv_version","alias_value":"2107.13384v2","created_at":"2026-07-05T04:23:36Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2107.13384","created_at":"2026-07-05T04:23:36Z"},{"alias_kind":"pith_short_12","alias_value":"C7JU53KW77WF","created_at":"2026-07-05T04:23:36Z"},{"alias_kind":"pith_short_16","alias_value":"C7JU53KW77WFZ4VY","created_at":"2026-07-05T04:23:36Z"},{"alias_kind":"pith_short_8","alias_value":"C7JU53KW","created_at":"2026-07-05T04:23:36Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:C7JU53KW77WFZ4VYW3VQYTDI3M","target":"record","payload":{"canonical_record":{"source":{"id":"2107.13384","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"nucl-th","submitted_at":"2021-07-28T14:21:27Z","cross_cats_sorted":[],"title_canon_sha256":"24ebe018bcac0632ebc05511f7dd8ada3df9b1f8fd81278c61d3607515791520","abstract_canon_sha256":"42e07fc5fe8e11a877bba9dfb78265a9c6cfefa248c7466e028be60c9531d506"},"schema_version":"1.0"},"canonical_sha256":"17d34eed56ffec5cf2b8b6eb0c4c68db211b7d993a72739793e7b2571c83693f","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T04:23:36.426071Z","signature_b64":"OJRZI5RLJK14WSiosrSd5/9+m9XzC2HCHRO+5ifLjXsH+7O7e3Ypb11k5r1wT5qWzLs20MEvYEJAftDOMIkiAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"17d34eed56ffec5cf2b8b6eb0c4c68db211b7d993a72739793e7b2571c83693f","last_reissued_at":"2026-07-05T04:23:36.425715Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T04:23:36.425715Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2107.13384","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":"2026-07-05T04:23:36Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"6BcEI6llR78gUooHIcl83a27iKe9FPzNGEbeUMU3EQE7wfIg1n9LxHO9A5/DMsRlcD8xdHXGSVm6QM9Q6GN4DA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-20T09:31:51.399974Z"},"content_sha256":"96373efbc2e7869a6e4d64ab64ae126915b953a24e9a8be1fb63765f0b642f5b","schema_version":"1.0","event_id":"sha256:96373efbc2e7869a6e4d64ab64ae126915b953a24e9a8be1fb63765f0b642f5b"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:C7JU53KW77WFZ4VYW3VQYTDI3M","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Charged pion production from Au + Au collisions at $\\sqrt{s_{NN}}=2.4$ GeV in the Relativistic Vlasov-Uehling-Uhlenbeck model","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"nucl-th","authors_text":"Che Ming Ko, Jeremy W. Holt, Kyle Godbey, Zhen Zhang","submitted_at":"2021-07-28T14:21:27Z","abstract_excerpt":"Using the isospin-dependent relativistic Vlasov-Uehling-Uhlenbeck (RVUU) model, we study charged pion ($\\pi^\\pm$) production in Au+Au collisions at $\\sqrt{s_{NN}}=$ 2.4 GeV. By fitting the density dependence of the $\\Delta$ resonance production cross section in nuclear medium to reproduce the experimental $\\pi^\\pm$ multiplicities measured by the HADES Collaboration, we obtain a good description of the rapidity distributions and transverse momentum spectra of $\\pi^\\pm$ in collisions at various centralities. Some shortcomings in the description of $\\pi^{\\pm}$ production may indicate the need for"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2107.13384","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/2107.13384/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":"2026-07-05T04:23:36Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"8m0+XlcbtEkjN2UvskGCXnCQZK1wrbbB+REwR4dhaM5XoWn2ZMJwlU/7u6lKxKRrCHYE/C9qxg9K9gCzby3MAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-20T09:31:51.400533Z"},"content_sha256":"c961f5ed5b53dcf4e03b4414370bee5926810cc082139101c5db0b600afc1a66","schema_version":"1.0","event_id":"sha256:c961f5ed5b53dcf4e03b4414370bee5926810cc082139101c5db0b600afc1a66"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/C7JU53KW77WFZ4VYW3VQYTDI3M/bundle.json","state_url":"https://pith.science/pith/C7JU53KW77WFZ4VYW3VQYTDI3M/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/C7JU53KW77WFZ4VYW3VQYTDI3M/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":"2026-08-20T09:31:51Z","links":{"resolver":"https://pith.science/pith/C7JU53KW77WFZ4VYW3VQYTDI3M","bundle":"https://pith.science/pith/C7JU53KW77WFZ4VYW3VQYTDI3M/bundle.json","state":"https://pith.science/pith/C7JU53KW77WFZ4VYW3VQYTDI3M/state.json","well_known_bundle":"https://pith.science/.well-known/pith/C7JU53KW77WFZ4VYW3VQYTDI3M/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:C7JU53KW77WFZ4VYW3VQYTDI3M","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":"42e07fc5fe8e11a877bba9dfb78265a9c6cfefa248c7466e028be60c9531d506","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"nucl-th","submitted_at":"2021-07-28T14:21:27Z","title_canon_sha256":"24ebe018bcac0632ebc05511f7dd8ada3df9b1f8fd81278c61d3607515791520"},"schema_version":"1.0","source":{"id":"2107.13384","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2107.13384","created_at":"2026-07-05T04:23:36Z"},{"alias_kind":"arxiv_version","alias_value":"2107.13384v2","created_at":"2026-07-05T04:23:36Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2107.13384","created_at":"2026-07-05T04:23:36Z"},{"alias_kind":"pith_short_12","alias_value":"C7JU53KW77WF","created_at":"2026-07-05T04:23:36Z"},{"alias_kind":"pith_short_16","alias_value":"C7JU53KW77WFZ4VY","created_at":"2026-07-05T04:23:36Z"},{"alias_kind":"pith_short_8","alias_value":"C7JU53KW","created_at":"2026-07-05T04:23:36Z"}],"graph_snapshots":[{"event_id":"sha256:c961f5ed5b53dcf4e03b4414370bee5926810cc082139101c5db0b600afc1a66","target":"graph","created_at":"2026-07-05T04:23:36Z","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/2107.13384/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Using the isospin-dependent relativistic Vlasov-Uehling-Uhlenbeck (RVUU) model, we study charged pion ($\\pi^\\pm$) production in Au+Au collisions at $\\sqrt{s_{NN}}=$ 2.4 GeV. By fitting the density dependence of the $\\Delta$ resonance production cross section in nuclear medium to reproduce the experimental $\\pi^\\pm$ multiplicities measured by the HADES Collaboration, we obtain a good description of the rapidity distributions and transverse momentum spectra of $\\pi^\\pm$ in collisions at various centralities. Some shortcomings in the description of $\\pi^{\\pm}$ production may indicate the need for","authors_text":"Che Ming Ko, Jeremy W. Holt, Kyle Godbey, Zhen Zhang","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"nucl-th","submitted_at":"2021-07-28T14:21:27Z","title":"Charged pion production from Au + Au collisions at $\\sqrt{s_{NN}}=2.4$ GeV in the Relativistic Vlasov-Uehling-Uhlenbeck model"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2107.13384","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":"sha256:96373efbc2e7869a6e4d64ab64ae126915b953a24e9a8be1fb63765f0b642f5b","target":"record","created_at":"2026-07-05T04:23:36Z","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":"42e07fc5fe8e11a877bba9dfb78265a9c6cfefa248c7466e028be60c9531d506","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"nucl-th","submitted_at":"2021-07-28T14:21:27Z","title_canon_sha256":"24ebe018bcac0632ebc05511f7dd8ada3df9b1f8fd81278c61d3607515791520"},"schema_version":"1.0","source":{"id":"2107.13384","kind":"arxiv","version":2}},"canonical_sha256":"17d34eed56ffec5cf2b8b6eb0c4c68db211b7d993a72739793e7b2571c83693f","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"17d34eed56ffec5cf2b8b6eb0c4c68db211b7d993a72739793e7b2571c83693f","first_computed_at":"2026-07-05T04:23:36.425715Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T04:23:36.425715Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"OJRZI5RLJK14WSiosrSd5/9+m9XzC2HCHRO+5ifLjXsH+7O7e3Ypb11k5r1wT5qWzLs20MEvYEJAftDOMIkiAA==","signature_status":"signed_v1","signed_at":"2026-07-05T04:23:36.426071Z","signed_message":"canonical_sha256_bytes"},"source_id":"2107.13384","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:96373efbc2e7869a6e4d64ab64ae126915b953a24e9a8be1fb63765f0b642f5b","sha256:c961f5ed5b53dcf4e03b4414370bee5926810cc082139101c5db0b600afc1a66"],"state_sha256":"119fcfb044cc34bf220187612213d4fc9b647094caf4a0d1593e00cb97b99e82"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"RS+f3/SnOgfH7rir3Vaom+nodym40ByHEM2JVURzzvr4lmXcUYErwTe6LQDlyRtUuRwV0o57xKCqsfnp7gvFCw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-20T09:31:51.405888Z","bundle_sha256":"8cacb82175e6de46ee91d4b8409bae0492fac7f9df83367941e8d0310271b870"}}