{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:OCA65J2M3WSVE7KCRRQKKJ7CGH","short_pith_number":"pith:OCA65J2M","canonical_record":{"source":{"id":"1704.06657","kind":"arxiv","version":4},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2017-04-21T18:00:00Z","cross_cats_sorted":["hep-ph"],"title_canon_sha256":"08f28267ed24487a3851e6731ae9a4bae218ace0913ef8528ef514cfa26a705a","abstract_canon_sha256":"501dcec14f1ab5f4e814ebc7e3718e405ff601924c80ad7705e6c7a1ce06f1e6"},"schema_version":"1.0"},"canonical_sha256":"7081eea74cdda5527d428c60a527e231d6bb2e22965c14528965158607ad87fb","source":{"kind":"arxiv","id":"1704.06657","version":4},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1704.06657","created_at":"2026-05-18T00:25:34Z"},{"alias_kind":"arxiv_version","alias_value":"1704.06657v4","created_at":"2026-05-18T00:25:34Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1704.06657","created_at":"2026-05-18T00:25:34Z"},{"alias_kind":"pith_short_12","alias_value":"OCA65J2M3WSV","created_at":"2026-05-18T12:31:34Z"},{"alias_kind":"pith_short_16","alias_value":"OCA65J2M3WSVE7KC","created_at":"2026-05-18T12:31:34Z"},{"alias_kind":"pith_short_8","alias_value":"OCA65J2M","created_at":"2026-05-18T12:31:34Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:OCA65J2M3WSVE7KCRRQKKJ7CGH","target":"record","payload":{"canonical_record":{"source":{"id":"1704.06657","kind":"arxiv","version":4},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2017-04-21T18:00:00Z","cross_cats_sorted":["hep-ph"],"title_canon_sha256":"08f28267ed24487a3851e6731ae9a4bae218ace0913ef8528ef514cfa26a705a","abstract_canon_sha256":"501dcec14f1ab5f4e814ebc7e3718e405ff601924c80ad7705e6c7a1ce06f1e6"},"schema_version":"1.0"},"canonical_sha256":"7081eea74cdda5527d428c60a527e231d6bb2e22965c14528965158607ad87fb","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:25:34.499328Z","signature_b64":"OLSDNSROrJnoqAI8/lkyJqLagX6ZAiFGojZUwUpgL8pg0PqnLxry1EOM5hpiajyXZtRhRwxvLwNRWMtE+m/TCw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"7081eea74cdda5527d428c60a527e231d6bb2e22965c14528965158607ad87fb","last_reissued_at":"2026-05-18T00:25:34.498560Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:25:34.498560Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1704.06657","source_version":4,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:25:34Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"vevtCMiwjgL2G/DQpTR0BtJ9YjSVViPQ6bdVNJ90iO3r5exbQuNEHKH1CopbBZC6GK6E5H8rL5Xogb8ywHa7Cw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T01:46:53.485246Z"},"content_sha256":"429381c5e6548f4f76eca2936444f6dcf6ae58e2cf319d0d3b52294ff32d91e1","schema_version":"1.0","event_id":"sha256:429381c5e6548f4f76eca2936444f6dcf6ae58e2cf319d0d3b52294ff32d91e1"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:OCA65J2M3WSVE7KCRRQKKJ7CGH","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A tale of two modes: Neutrino free-streaming in the early universe","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["hep-ph"],"primary_cat":"astro-ph.CO","authors_text":"Francis-Yan Cyr-Racine, Lachlan Lancaster, Lloyd Knox, Zhen Pan","submitted_at":"2017-04-21T18:00:00Z","abstract_excerpt":"We present updated constraints on the free-streaming nature of cosmological neutrinos from cosmic microwave background (CMB) power spectra, baryonic acoustic oscillation data, and local measurements of the Hubble constant. Specifically, we consider a Fermi-like four-fermion interaction between massless neutrinos, characterized by an effective coupling constant $ G_{\\rm eff}$, and resulting in a neutrino opacity $\\dot{\\tau}_\\nu\\propto G_{\\rm eff}^2 T_\\nu^5$. Using a conservative prior on the parameter $\\log_{10}\\left(G_{\\rm eff} {\\rm MeV}^2\\right)$, we find a bimodal posterior distribution. The"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1704.06657","kind":"arxiv","version":4},"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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:25:34Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"417DVAiwyiaMcEZniO+hLZdRLOJJ8hNUBP+/elK3fUGHFVSaJAhLQkEQXonPOIzGuX9IAf9BqvoNQEzQi6H1AQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T01:46:53.485837Z"},"content_sha256":"68415d54db360d20bca66c2ddbdbc43081c7c18d1d1b2151692db8048fa95899","schema_version":"1.0","event_id":"sha256:68415d54db360d20bca66c2ddbdbc43081c7c18d1d1b2151692db8048fa95899"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/OCA65J2M3WSVE7KCRRQKKJ7CGH/bundle.json","state_url":"https://pith.science/pith/OCA65J2M3WSVE7KCRRQKKJ7CGH/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/OCA65J2M3WSVE7KCRRQKKJ7CGH/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-05-27T01:46:53Z","links":{"resolver":"https://pith.science/pith/OCA65J2M3WSVE7KCRRQKKJ7CGH","bundle":"https://pith.science/pith/OCA65J2M3WSVE7KCRRQKKJ7CGH/bundle.json","state":"https://pith.science/pith/OCA65J2M3WSVE7KCRRQKKJ7CGH/state.json","well_known_bundle":"https://pith.science/.well-known/pith/OCA65J2M3WSVE7KCRRQKKJ7CGH/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:OCA65J2M3WSVE7KCRRQKKJ7CGH","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":"501dcec14f1ab5f4e814ebc7e3718e405ff601924c80ad7705e6c7a1ce06f1e6","cross_cats_sorted":["hep-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2017-04-21T18:00:00Z","title_canon_sha256":"08f28267ed24487a3851e6731ae9a4bae218ace0913ef8528ef514cfa26a705a"},"schema_version":"1.0","source":{"id":"1704.06657","kind":"arxiv","version":4}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1704.06657","created_at":"2026-05-18T00:25:34Z"},{"alias_kind":"arxiv_version","alias_value":"1704.06657v4","created_at":"2026-05-18T00:25:34Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1704.06657","created_at":"2026-05-18T00:25:34Z"},{"alias_kind":"pith_short_12","alias_value":"OCA65J2M3WSV","created_at":"2026-05-18T12:31:34Z"},{"alias_kind":"pith_short_16","alias_value":"OCA65J2M3WSVE7KC","created_at":"2026-05-18T12:31:34Z"},{"alias_kind":"pith_short_8","alias_value":"OCA65J2M","created_at":"2026-05-18T12:31:34Z"}],"graph_snapshots":[{"event_id":"sha256:68415d54db360d20bca66c2ddbdbc43081c7c18d1d1b2151692db8048fa95899","target":"graph","created_at":"2026-05-18T00:25:34Z","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 updated constraints on the free-streaming nature of cosmological neutrinos from cosmic microwave background (CMB) power spectra, baryonic acoustic oscillation data, and local measurements of the Hubble constant. Specifically, we consider a Fermi-like four-fermion interaction between massless neutrinos, characterized by an effective coupling constant $ G_{\\rm eff}$, and resulting in a neutrino opacity $\\dot{\\tau}_\\nu\\propto G_{\\rm eff}^2 T_\\nu^5$. Using a conservative prior on the parameter $\\log_{10}\\left(G_{\\rm eff} {\\rm MeV}^2\\right)$, we find a bimodal posterior distribution. The","authors_text":"Francis-Yan Cyr-Racine, Lachlan Lancaster, Lloyd Knox, Zhen Pan","cross_cats":["hep-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2017-04-21T18:00:00Z","title":"A tale of two modes: Neutrino free-streaming in the early universe"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1704.06657","kind":"arxiv","version":4},"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":"sha256:429381c5e6548f4f76eca2936444f6dcf6ae58e2cf319d0d3b52294ff32d91e1","target":"record","created_at":"2026-05-18T00:25:34Z","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":"501dcec14f1ab5f4e814ebc7e3718e405ff601924c80ad7705e6c7a1ce06f1e6","cross_cats_sorted":["hep-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2017-04-21T18:00:00Z","title_canon_sha256":"08f28267ed24487a3851e6731ae9a4bae218ace0913ef8528ef514cfa26a705a"},"schema_version":"1.0","source":{"id":"1704.06657","kind":"arxiv","version":4}},"canonical_sha256":"7081eea74cdda5527d428c60a527e231d6bb2e22965c14528965158607ad87fb","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"7081eea74cdda5527d428c60a527e231d6bb2e22965c14528965158607ad87fb","first_computed_at":"2026-05-18T00:25:34.498560Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:25:34.498560Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"OLSDNSROrJnoqAI8/lkyJqLagX6ZAiFGojZUwUpgL8pg0PqnLxry1EOM5hpiajyXZtRhRwxvLwNRWMtE+m/TCw==","signature_status":"signed_v1","signed_at":"2026-05-18T00:25:34.499328Z","signed_message":"canonical_sha256_bytes"},"source_id":"1704.06657","source_kind":"arxiv","source_version":4}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:429381c5e6548f4f76eca2936444f6dcf6ae58e2cf319d0d3b52294ff32d91e1","sha256:68415d54db360d20bca66c2ddbdbc43081c7c18d1d1b2151692db8048fa95899"],"state_sha256":"61589a2ceb4abc00fc9735bf4a9c330b6603e5563c4b7a224c717b76fe988fd9"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"sSezPWlPCojJp3K6eTacz4ojbJSrcozRR0Egm/p8Wgf0YqYhcYx2RDJ0Qa8mvdtux9R1aJQbrYk61T3ti48pDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T01:46:53.488393Z","bundle_sha256":"768079039cec69b9f051ed46203000eab6e1ea7b5528825e6559dfeb6e541ea5"}}