{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:1997:QJ6V5Y45X7KJFSMMXAFVSEHR2Y","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":"44d91b9428319da5417432113b0324bc89c97e2d514a1e4edf900dff1cd0b6cf","cross_cats_sorted":["nucl-th"],"license":"","primary_cat":"hep-ph","submitted_at":"1997-03-26T02:18:53Z","title_canon_sha256":"820e0c61e05a6f7f7b669aa244406fb688884f727782237175a2ee6f3c0b8ad9"},"schema_version":"1.0","source":{"id":"hep-ph/9703422","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"hep-ph/9703422","created_at":"2026-05-18T04:24:17Z"},{"alias_kind":"arxiv_version","alias_value":"hep-ph/9703422v1","created_at":"2026-05-18T04:24:17Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.hep-ph/9703422","created_at":"2026-05-18T04:24:17Z"},{"alias_kind":"pith_short_12","alias_value":"QJ6V5Y45X7KJ","created_at":"2026-05-18T12:25:48Z"},{"alias_kind":"pith_short_16","alias_value":"QJ6V5Y45X7KJFSMM","created_at":"2026-05-18T12:25:48Z"},{"alias_kind":"pith_short_8","alias_value":"QJ6V5Y45","created_at":"2026-05-18T12:25:48Z"}],"graph_snapshots":[{"event_id":"sha256:95029cb254bb376dd92a82edc784956471f189b1d28beb59aebb50a385537e61","target":"graph","created_at":"2026-05-18T04:24:17Z","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":"We study production of photons via the non-equilibrium relaxation of a Disoriented Chiral Condensate with the chiral order parameter having a large initial amplitude along the \\pi^0 direction. Assuming the validity of the low energy coupling of the neutral pion to photons via the U_A(1) anomalous vertex, we find that for large initial amplitudes along the \\pi^0 direction, photon production is enhanced by parametric amplification. These processes are non-perturbative with a large contribution during the non-equilibrium stages of the evolution and result in a distinct distribution of the produce","authors_text":"D.Boyanovsky, H.J.de Vega, R.Holman, S.Prem Kumar","cross_cats":["nucl-th"],"headline":"","license":"","primary_cat":"hep-ph","submitted_at":"1997-03-26T02:18:53Z","title":"Non-Equilibrium Production of Photons via \\pi^0\\to 2\\gamma in DCC's"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"hep-ph/9703422","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":"sha256:054b50c90b0db2361797d7b41b5368226eaca058a642da09fc81e1cbad6e6683","target":"record","created_at":"2026-05-18T04:24:17Z","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":"44d91b9428319da5417432113b0324bc89c97e2d514a1e4edf900dff1cd0b6cf","cross_cats_sorted":["nucl-th"],"license":"","primary_cat":"hep-ph","submitted_at":"1997-03-26T02:18:53Z","title_canon_sha256":"820e0c61e05a6f7f7b669aa244406fb688884f727782237175a2ee6f3c0b8ad9"},"schema_version":"1.0","source":{"id":"hep-ph/9703422","kind":"arxiv","version":1}},"canonical_sha256":"827d5ee39dbfd492c98cb80b5910f1d63341bd6e22a5612633912ad41655b14c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"827d5ee39dbfd492c98cb80b5910f1d63341bd6e22a5612633912ad41655b14c","first_computed_at":"2026-05-18T04:24:17.385096Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:24:17.385096Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"NxCnXpT5TwGxhG6NlmV+c0gku+ipjSLobxD6eLZA5dVF2tfIU/yKkwm/SzgyRuIfWEOXKx/fgLLNUiZslCS2Dw==","signature_status":"signed_v1","signed_at":"2026-05-18T04:24:17.386781Z","signed_message":"canonical_sha256_bytes"},"source_id":"hep-ph/9703422","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:054b50c90b0db2361797d7b41b5368226eaca058a642da09fc81e1cbad6e6683","sha256:95029cb254bb376dd92a82edc784956471f189b1d28beb59aebb50a385537e61"],"state_sha256":"6e68478d61edf0e49cbf7b2df48e457de690a6cfb8380faabf8237a53f087df8"}