{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2009:HGMM2VB6VSFTUU5EI6T3FP2NCM","short_pith_number":"pith:HGMM2VB6","schema_version":"1.0","canonical_sha256":"3998cd543eac8b3a53a447a7b2bf4d130b8c023e12058e7b2b729683a544c138","source":{"kind":"arxiv","id":"0906.1602","version":2},"attestation_state":"computed","paper":{"title":"Isospin-dependent pion in-medium effects on charged pion ratio in heavy ion collisions","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["nucl-ex"],"primary_cat":"nucl-th","authors_text":"Che Ming Ko, Jun Xu, Yongseok Oh","submitted_at":"2009-06-08T21:25:47Z","abstract_excerpt":"Using results from the chiral perturbation theory for the s-wave interaction and the delta-resonance model for the p-wave interaction of pions with nucleons, we have evaluated the spectral functions of pions in asymmetric nuclear matter with unequal proton and neutron densities. We find that in hot dense neutron-rich matter the strength of the spectral function of positively charged pion at low energies is somewhat larger than that of negatively charged pion. In a thermal model, this isospin-dependent effect slightly reduces the ratio of negatively charged to positively charged pions that are "},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"0906.1602","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-th","submitted_at":"2009-06-08T21:25:47Z","cross_cats_sorted":["nucl-ex"],"title_canon_sha256":"156838876b39f53effc9d0d69c04e09a3bccc538ab1c6f4e22d1531d4bf0199a","abstract_canon_sha256":"4f13a37845a211d3b4bfc7d29d417de55b2056ecb6c0787eca9252d4296d77fa"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:34:45.821288Z","signature_b64":"rbSZgqpMKMomOh4uiEk0Y42+xPL+C0rloJNkXO6t6nH6QVdV3oaYyDTEKU4o8dlxAIqfbRs5Z+zXvbM0bgpSDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"3998cd543eac8b3a53a447a7b2bf4d130b8c023e12058e7b2b729683a544c138","last_reissued_at":"2026-05-18T02:34:45.820867Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:34:45.820867Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Isospin-dependent pion in-medium effects on charged pion ratio in heavy ion collisions","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["nucl-ex"],"primary_cat":"nucl-th","authors_text":"Che Ming Ko, Jun Xu, Yongseok Oh","submitted_at":"2009-06-08T21:25:47Z","abstract_excerpt":"Using results from the chiral perturbation theory for the s-wave interaction and the delta-resonance model for the p-wave interaction of pions with nucleons, we have evaluated the spectral functions of pions in asymmetric nuclear matter with unequal proton and neutron densities. We find that in hot dense neutron-rich matter the strength of the spectral function of positively charged pion at low energies is somewhat larger than that of negatively charged pion. In a thermal model, this isospin-dependent effect slightly reduces the ratio of negatively charged to positively charged pions that are "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0906.1602","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":""},"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"},"aliases":[{"alias_kind":"arxiv","alias_value":"0906.1602","created_at":"2026-05-18T02:34:45.820933+00:00"},{"alias_kind":"arxiv_version","alias_value":"0906.1602v2","created_at":"2026-05-18T02:34:45.820933+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0906.1602","created_at":"2026-05-18T02:34:45.820933+00:00"},{"alias_kind":"pith_short_12","alias_value":"HGMM2VB6VSFT","created_at":"2026-05-18T12:25:59.703012+00:00"},{"alias_kind":"pith_short_16","alias_value":"HGMM2VB6VSFTUU5E","created_at":"2026-05-18T12:25:59.703012+00:00"},{"alias_kind":"pith_short_8","alias_value":"HGMM2VB6","created_at":"2026-05-18T12:25:59.703012+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":1,"internal_anchor_count":1,"sample":[{"citing_arxiv_id":"2603.00865","citing_title":"Angular momentum conservation and pion production in intermediate-energy heavy-ion collisions","ref_index":16,"is_internal_anchor":true}]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/HGMM2VB6VSFTUU5EI6T3FP2NCM","json":"https://pith.science/pith/HGMM2VB6VSFTUU5EI6T3FP2NCM.json","graph_json":"https://pith.science/api/pith-number/HGMM2VB6VSFTUU5EI6T3FP2NCM/graph.json","events_json":"https://pith.science/api/pith-number/HGMM2VB6VSFTUU5EI6T3FP2NCM/events.json","paper":"https://pith.science/paper/HGMM2VB6"},"agent_actions":{"view_html":"https://pith.science/pith/HGMM2VB6VSFTUU5EI6T3FP2NCM","download_json":"https://pith.science/pith/HGMM2VB6VSFTUU5EI6T3FP2NCM.json","view_paper":"https://pith.science/paper/HGMM2VB6","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=0906.1602&json=true","fetch_graph":"https://pith.science/api/pith-number/HGMM2VB6VSFTUU5EI6T3FP2NCM/graph.json","fetch_events":"https://pith.science/api/pith-number/HGMM2VB6VSFTUU5EI6T3FP2NCM/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/HGMM2VB6VSFTUU5EI6T3FP2NCM/action/timestamp_anchor","attest_storage":"https://pith.science/pith/HGMM2VB6VSFTUU5EI6T3FP2NCM/action/storage_attestation","attest_author":"https://pith.science/pith/HGMM2VB6VSFTUU5EI6T3FP2NCM/action/author_attestation","sign_citation":"https://pith.science/pith/HGMM2VB6VSFTUU5EI6T3FP2NCM/action/citation_signature","submit_replication":"https://pith.science/pith/HGMM2VB6VSFTUU5EI6T3FP2NCM/action/replication_record"}},"created_at":"2026-05-18T02:34:45.820933+00:00","updated_at":"2026-05-18T02:34:45.820933+00:00"}