{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:GHQ75BJS64UBYKIVVVJXJQLAOQ","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":"da58d4591c2cdf4eeba786afe410fe3b4ca5dec48936f4a9b228e12bba714713","cross_cats_sorted":["nucl-ex"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-th","submitted_at":"2014-10-18T09:15:55Z","title_canon_sha256":"584b9758d40504fa882361bc7c78daee07b9a687d569ab276311ca573ec723cd"},"schema_version":"1.0","source":{"id":"1410.4926","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1410.4926","created_at":"2026-05-18T02:02:08Z"},{"alias_kind":"arxiv_version","alias_value":"1410.4926v2","created_at":"2026-05-18T02:02:08Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1410.4926","created_at":"2026-05-18T02:02:08Z"},{"alias_kind":"pith_short_12","alias_value":"GHQ75BJS64UB","created_at":"2026-05-18T12:28:30Z"},{"alias_kind":"pith_short_16","alias_value":"GHQ75BJS64UBYKIV","created_at":"2026-05-18T12:28:30Z"},{"alias_kind":"pith_short_8","alias_value":"GHQ75BJS","created_at":"2026-05-18T12:28:30Z"}],"graph_snapshots":[{"event_id":"sha256:59d0aed1454a454f12ddbca9c4907e5772b87ddef5733ec91889557093d4f588","target":"graph","created_at":"2026-05-18T02:02:08Z","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"},"paper":{"abstract_excerpt":"Within the framework of the isospin-dependent Boltzmann-Uehling-Uhlenbeck(IBUU) transport model, we studied the effects of the pion potential and the symmetry energy on the pion production in the central $^{197}Au+^{197}Au$ collisions around the pion production threshold. It is found that the pion potential has opposite effects on the value of $\\pi^-/\\pi^+$ ratio at low and high pion energies. The effect of the pion potential on the total $\\pi^-/\\pi^+$ ratio becomes larger in heavy-ion collisions at beam energies below the pion production threshold. And at beam energies below the pion producti","authors_text":"Gao-Chan Yong, Hang Liu, Wei Zuo, Wen-Mei Guo","cross_cats":["nucl-ex"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-th","submitted_at":"2014-10-18T09:15:55Z","title":"Effects of pion potential and nuclear symmetry energy on the $\\pi^{-}/\\pi^{+}$ ratio in heavy-ion collisions at beam energies around the pion production threshold"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1410.4926","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:c6732c9ae5776bde57fb03b22641f9f46b9d01674741d5bbb44dc9bfd04c85a5","target":"record","created_at":"2026-05-18T02:02:08Z","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":"da58d4591c2cdf4eeba786afe410fe3b4ca5dec48936f4a9b228e12bba714713","cross_cats_sorted":["nucl-ex"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-th","submitted_at":"2014-10-18T09:15:55Z","title_canon_sha256":"584b9758d40504fa882361bc7c78daee07b9a687d569ab276311ca573ec723cd"},"schema_version":"1.0","source":{"id":"1410.4926","kind":"arxiv","version":2}},"canonical_sha256":"31e1fe8532f7281c2915ad5374c1607427d0fa0eabb1f518618e67f14e0d7347","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"31e1fe8532f7281c2915ad5374c1607427d0fa0eabb1f518618e67f14e0d7347","first_computed_at":"2026-05-18T02:02:08.197612Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:02:08.197612Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"YTJh+G+Z8MmDZILh819/HPQB9cUklET7m1TZpJolIxzt7S4TwF3nswjJD5dpVDM55hcZdFnUg+t87Yqe2rR3AA==","signature_status":"signed_v1","signed_at":"2026-05-18T02:02:08.198273Z","signed_message":"canonical_sha256_bytes"},"source_id":"1410.4926","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:c6732c9ae5776bde57fb03b22641f9f46b9d01674741d5bbb44dc9bfd04c85a5","sha256:59d0aed1454a454f12ddbca9c4907e5772b87ddef5733ec91889557093d4f588"],"state_sha256":"04f2f2eddf5329d09d949da613848c9bf092902a6b5c74d56e8771d84ea27eda"}