{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2005:O3WFKB2UQ53JGQNYDHE3DHXHD3","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":"05fce994b0f509c7077a825058c30a8d3b9380885cd8f068c8f5944bf4ff7ebc","cross_cats_sorted":[],"license":"","primary_cat":"nucl-ex","submitted_at":"2005-06-01T15:24:16Z","title_canon_sha256":"482907a866d3a2667ba23455441c16100ad8f3b5f2da51908674acb1adadeeda"},"schema_version":"1.0","source":{"id":"nucl-ex/0506002","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"nucl-ex/0506002","created_at":"2026-05-18T04:13:27Z"},{"alias_kind":"arxiv_version","alias_value":"nucl-ex/0506002v1","created_at":"2026-05-18T04:13:27Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.nucl-ex/0506002","created_at":"2026-05-18T04:13:27Z"},{"alias_kind":"pith_short_12","alias_value":"O3WFKB2UQ53J","created_at":"2026-05-18T12:25:53Z"},{"alias_kind":"pith_short_16","alias_value":"O3WFKB2UQ53JGQNY","created_at":"2026-05-18T12:25:53Z"},{"alias_kind":"pith_short_8","alias_value":"O3WFKB2U","created_at":"2026-05-18T12:25:53Z"}],"graph_snapshots":[{"event_id":"sha256:d798158d90ce6d5fb839cb4d0d2098f875b1970594f614e16f7e657c0ef17ea5","target":"graph","created_at":"2026-05-18T04:13:27Z","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 present the combined results on electron-pair production in 158 GeV/n {Pb-Au} ($\\sqrt{s}$= 17.2 GeV) collisions taken at the CERN SPS in 1995 and 1996, and give a detailed account of the data analysis. The enhancement over the reference of neutral meson decays amounts to a factor of 2.31$\\pm0.19 (stat.)\\pm0.55 (syst.)\\pm0.69 (decays)$ for semi-central collisions (28% $\\sigma/\\sigma_{geo}$) when yields are integrated over $m>$ 200 MeV/$c^2$ in invariant mass. The measured yield, its stronger-than-linear scaling with $N_{ch}$, and the dominance of low pair $p_t$ strongly suggest an interpreta","authors_text":"A.Cherlin, A. Drees, A.Marin, A.Pfeiffer, B.Lenkeit, Ch.Fuchs, Ch.Jung, C.P.de los Heros, C.Voigt, C.Weber, D.Miskowiec, E.Gatti, E.Socol, F.Messer, G.Agakichiev, G.Hering, G.Tel-Zur, H.Appelshauser, H.J.Specht, H.Sako, I.Ravinovich, I.Tserruya, J.Bielcikova, J.P.Wessels, J.P.Wurm, J.Rak, J.Schukraft, J.Stachel, M.Messer, M.Richter, M.Sampietro, N.Saveljic, O.Nix, P.Braun-Munzinger, P.Glassel, P.Holl, P.Rehak, R.Baur, S.Damjanovic, S.Esumi, S.Razin, S.Shimanskiy, S.Voloshin, T.Ullrich, T.Wienold, U.Faschingbauer, V.Yurevich, W.Schmitz, W.Seipp, Yu.Panebrattsev, Z.Fraenkel","cross_cats":[],"headline":"","license":"","primary_cat":"nucl-ex","submitted_at":"2005-06-01T15:24:16Z","title":"e+e--pair production in Pb-Au collisions at 158 GeV per nucleon"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"nucl-ex/0506002","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":"sha256:24826966832a4252d2639e1eb7508b25f739d54c401b8ddc6ecbbbd7b4e6f240","target":"record","created_at":"2026-05-18T04:13:27Z","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":"05fce994b0f509c7077a825058c30a8d3b9380885cd8f068c8f5944bf4ff7ebc","cross_cats_sorted":[],"license":"","primary_cat":"nucl-ex","submitted_at":"2005-06-01T15:24:16Z","title_canon_sha256":"482907a866d3a2667ba23455441c16100ad8f3b5f2da51908674acb1adadeeda"},"schema_version":"1.0","source":{"id":"nucl-ex/0506002","kind":"arxiv","version":1}},"canonical_sha256":"76ec55075487769341b819c9b19ee71ed5995f3fbc51d5d71ad7488b2b58e919","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"76ec55075487769341b819c9b19ee71ed5995f3fbc51d5d71ad7488b2b58e919","first_computed_at":"2026-05-18T04:13:27.246067Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:13:27.246067Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"DTsRG7UwyKbiQt1daM2+R0YckUUUEMYrtVSO/18XFUACDIuksmO94OR8JHmEpv0Zt/kv8iTu9Y4MXNepgDrxCA==","signature_status":"signed_v1","signed_at":"2026-05-18T04:13:27.246542Z","signed_message":"canonical_sha256_bytes"},"source_id":"nucl-ex/0506002","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:24826966832a4252d2639e1eb7508b25f739d54c401b8ddc6ecbbbd7b4e6f240","sha256:d798158d90ce6d5fb839cb4d0d2098f875b1970594f614e16f7e657c0ef17ea5"],"state_sha256":"52ad45d3185bda500a43031aae94ba31c42addbc22e0e508c0f479ca0c5a8388"}