{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:ZNDJUIAAANBHJLIVABXAWJN6VX","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":"70fb9a07d75ceeb7d696935f23db3ca25e9086bbfa4d2cab4ea22602d9488579","cross_cats_sorted":["astro-ph.CO","nucl-ex","nucl-th"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2012-07-31T21:10:54Z","title_canon_sha256":"32bc33dbf2d272dd8320912f3e169c0db2b73fa23860637718a71eff59113bd6"},"schema_version":"1.0","source":{"id":"1208.0032","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1208.0032","created_at":"2026-05-18T03:25:04Z"},{"alias_kind":"arxiv_version","alias_value":"1208.0032v1","created_at":"2026-05-18T03:25:04Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1208.0032","created_at":"2026-05-18T03:25:04Z"},{"alias_kind":"pith_short_12","alias_value":"ZNDJUIAAANBH","created_at":"2026-05-18T12:27:30Z"},{"alias_kind":"pith_short_16","alias_value":"ZNDJUIAAANBHJLIV","created_at":"2026-05-18T12:27:30Z"},{"alias_kind":"pith_short_8","alias_value":"ZNDJUIAA","created_at":"2026-05-18T12:27:30Z"}],"graph_snapshots":[{"event_id":"sha256:55c44ffd34f008caf778f1ef552de780be5dcdd888e81b91bfffe71e0b783d1f","target":"graph","created_at":"2026-05-18T03:25:04Z","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":"According to the standard models of particle physics and cosmology, there should be a background of cosmic neutrinos in the present Universe, similar to the cosmic microwave photon background. The weakness of the weak interactions renders this neutrino background undetectable with current technology. The cosmic neutrino background can, however, be probed indirectly through its cosmological effects on big bang nucleosynthesis (BBN) and the cosmic microwave background (CMB) radiation. In this BBN review, focused on neutrinos and, more generally on dark radiation, the BBN constraints on the numbe","authors_text":"Gary Steigman","cross_cats":["astro-ph.CO","nucl-ex","nucl-th"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2012-07-31T21:10:54Z","title":"Neutrinos And Big Bang Nucleosynthesis"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1208.0032","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":"sha256:83988efa7e4f1fc5648182841f102ab05b9299e87a39b045a2ed06fe8c78b6da","target":"record","created_at":"2026-05-18T03:25:04Z","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":"70fb9a07d75ceeb7d696935f23db3ca25e9086bbfa4d2cab4ea22602d9488579","cross_cats_sorted":["astro-ph.CO","nucl-ex","nucl-th"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2012-07-31T21:10:54Z","title_canon_sha256":"32bc33dbf2d272dd8320912f3e169c0db2b73fa23860637718a71eff59113bd6"},"schema_version":"1.0","source":{"id":"1208.0032","kind":"arxiv","version":1}},"canonical_sha256":"cb469a2000034274ad15006e0b25beadd389f99954ec3ef3853bf4c96f7ef33e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"cb469a2000034274ad15006e0b25beadd389f99954ec3ef3853bf4c96f7ef33e","first_computed_at":"2026-05-18T03:25:04.225474Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:25:04.225474Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"DdWPYDJOuAc6yjVUtpLccae4j0fJgk+jGYWFkBnWAriiqYSVfVzvgiWDZ+3Y/YOgMn0+9Ir0BNywNXY5Yz7dBQ==","signature_status":"signed_v1","signed_at":"2026-05-18T03:25:04.226015Z","signed_message":"canonical_sha256_bytes"},"source_id":"1208.0032","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:83988efa7e4f1fc5648182841f102ab05b9299e87a39b045a2ed06fe8c78b6da","sha256:55c44ffd34f008caf778f1ef552de780be5dcdd888e81b91bfffe71e0b783d1f"],"state_sha256":"5f44f742f10c76b7fdf8b8e761efdfbbf643d7050a389d96bb61ec067ce26f7e"}