{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:3ZFEA62MMEZC2A5CSBFLAIYDHP","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":"4cf7813c3ea3ecb28264101a3fbba04d6aac58973a79725e08926ed104617076","cross_cats_sorted":["nucl-ex"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-th","submitted_at":"2020-08-08T13:01:16Z","title_canon_sha256":"da1e7c3325b0eb7c71de4a38aefc6f1991f295e73218eb9294b24ea461528815"},"schema_version":"1.0","source":{"id":"2008.03514","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2008.03514","created_at":"2026-07-05T01:25:42Z"},{"alias_kind":"arxiv_version","alias_value":"2008.03514v1","created_at":"2026-07-05T01:25:42Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2008.03514","created_at":"2026-07-05T01:25:42Z"},{"alias_kind":"pith_short_12","alias_value":"3ZFEA62MMEZC","created_at":"2026-07-05T01:25:42Z"},{"alias_kind":"pith_short_16","alias_value":"3ZFEA62MMEZC2A5C","created_at":"2026-07-05T01:25:42Z"},{"alias_kind":"pith_short_8","alias_value":"3ZFEA62M","created_at":"2026-07-05T01:25:42Z"}],"graph_snapshots":[{"event_id":"sha256:fdd73c0b5ab5ac2c3db78cac564d216fbba9dd0bd09f6cad3a79819139211ada","target":"graph","created_at":"2026-07-05T01:25:42Z","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/2008.03514/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Direct photon produced from first proton-neutron ($p$-$n$) collision during the early stage of heavy ion reaction is a sensitive probe to reflect energy and momentum distribution of nucleons. In this work, we embedded the hard photon production channel in an extended quantum molecular dynamics (EQMD) model, and took the direct photon as a possible probe to improve namely the Fermi motion in the EQMD model. A possible scheme is offered to handle the dynamical wave packet width within incoherent bremsstrahlung process. Direct photons calculated by our modified EQMD were compared with data of $^{","authors_text":"C. Zhong, C.Z. Shi, D. Q. Fang, W. B. He, X. G. Cao, Y. G. Ma","cross_cats":["nucl-ex"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-th","submitted_at":"2020-08-08T13:01:16Z","title":"Direct photon emission and influence of dynamical wave packets in an extended quantum molecular dynamics model"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2008.03514","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":"sha256:2e52cad4d96e55fad696a37a5332f3ee5f8e0f95afb895779a36ba88b654c99d","target":"record","created_at":"2026-07-05T01:25:42Z","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":"4cf7813c3ea3ecb28264101a3fbba04d6aac58973a79725e08926ed104617076","cross_cats_sorted":["nucl-ex"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-th","submitted_at":"2020-08-08T13:01:16Z","title_canon_sha256":"da1e7c3325b0eb7c71de4a38aefc6f1991f295e73218eb9294b24ea461528815"},"schema_version":"1.0","source":{"id":"2008.03514","kind":"arxiv","version":1}},"canonical_sha256":"de4a407b4c61322d03a2904ab023033bf848246377eded5a25ee4b441d93644d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"de4a407b4c61322d03a2904ab023033bf848246377eded5a25ee4b441d93644d","first_computed_at":"2026-07-05T01:25:42.573369Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T01:25:42.573369Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"QOMBnI8VTNKmBsDkURWD33blVCdTVrpYdOfhYaS9alYgquuhT3ErORdc1w4J4GPA1TsCOn4MNfw7flkY73kCCw==","signature_status":"signed_v1","signed_at":"2026-07-05T01:25:42.573740Z","signed_message":"canonical_sha256_bytes"},"source_id":"2008.03514","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:2e52cad4d96e55fad696a37a5332f3ee5f8e0f95afb895779a36ba88b654c99d","sha256:fdd73c0b5ab5ac2c3db78cac564d216fbba9dd0bd09f6cad3a79819139211ada"],"state_sha256":"bf10a53717d6224a758016cc3d4243e6a97216c3290729ff04aec6f36b0273a5"}