{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:ARKLKLCNRFTISKFAUG7U5GXZLI","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":"6ecd785e9f8f5e19c5124ecaa9a28f87b5ae32dc44a49550f5570060f36edd83","cross_cats_sorted":["hep-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2018-04-26T17:27:49Z","title_canon_sha256":"4126ef6299c019aaad0a4318b6b99abb64b2d739f7f1dcb6915bd611f473c60b"},"schema_version":"1.0","source":{"id":"1804.10180","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1804.10180","created_at":"2026-05-18T00:11:56Z"},{"alias_kind":"arxiv_version","alias_value":"1804.10180v2","created_at":"2026-05-18T00:11:56Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1804.10180","created_at":"2026-05-18T00:11:56Z"},{"alias_kind":"pith_short_12","alias_value":"ARKLKLCNRFTI","created_at":"2026-05-18T12:32:13Z"},{"alias_kind":"pith_short_16","alias_value":"ARKLKLCNRFTISKFA","created_at":"2026-05-18T12:32:13Z"},{"alias_kind":"pith_short_8","alias_value":"ARKLKLCN","created_at":"2026-05-18T12:32:13Z"}],"graph_snapshots":[{"event_id":"sha256:835a2105b97fd7a7d0a3684f81ec737a2ef9d19fa397ee01e24181e5c76cf576","target":"graph","created_at":"2026-05-18T00:11:56Z","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":"The acoustic peaks in the angular power spectrum of cosmic microwave background (CMB) temperature and polarization anisotropies play an important role as a probe of the nature of new relativistic particles contributing to the radiation density in the early universe, parametrized by $\\Delta N_{eff}$. The amplitude and phase of the acoustic oscillations provide information about whether the extra species are free-streaming particles, like neutrinos, or tightly-coupled, like the photons, during eras probed by the CMB. On the other hand, some extensions of the Standard Model produce new relativist","authors_text":"Chi-Ting Chiang, Gongjun Choi, Marilena Loverde","cross_cats":["hep-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2018-04-26T17:27:49Z","title":"Probing Decoupling in Dark Sectors with the Cosmic Microwave Background"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1804.10180","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":"sha256:8bb555d41a23570f72e824d18c8fa019b8fc84b1d7a7f0acceeedb31a0a3e4e0","target":"record","created_at":"2026-05-18T00:11:56Z","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":"6ecd785e9f8f5e19c5124ecaa9a28f87b5ae32dc44a49550f5570060f36edd83","cross_cats_sorted":["hep-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2018-04-26T17:27:49Z","title_canon_sha256":"4126ef6299c019aaad0a4318b6b99abb64b2d739f7f1dcb6915bd611f473c60b"},"schema_version":"1.0","source":{"id":"1804.10180","kind":"arxiv","version":2}},"canonical_sha256":"0454b52c4d89668928a0a1bf4e9af95a2061f928a68f9b790dcdbb18f1397478","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"0454b52c4d89668928a0a1bf4e9af95a2061f928a68f9b790dcdbb18f1397478","first_computed_at":"2026-05-18T00:11:56.900364Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:11:56.900364Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"SjwkN3YtuMOTYevoQEuFvUNHDflZo4jcJLwKT39i6Cs3SK9OY33oFLxjXxkhvtMS9uKh/vJsw4Nm4mpwsY0rBg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:11:56.900922Z","signed_message":"canonical_sha256_bytes"},"source_id":"1804.10180","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:8bb555d41a23570f72e824d18c8fa019b8fc84b1d7a7f0acceeedb31a0a3e4e0","sha256:835a2105b97fd7a7d0a3684f81ec737a2ef9d19fa397ee01e24181e5c76cf576"],"state_sha256":"1fe60f67e1f7b45dffdcff388d7e0ad9c90004ea48bcad9da426b1f1371a9b3b"}