{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2001:FUUFCAZTNFSAIGGEVBJR4BDANC","short_pith_number":"pith:FUUFCAZT","canonical_record":{"source":{"id":"astro-ph/0102144","kind":"arxiv","version":4},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2001-02-08T18:49:49Z","cross_cats_sorted":["hep-ph","hep-th"],"title_canon_sha256":"bc7a9106facac2e7b95a54067afbaf69c24632e97fca34a543ca0b243ca886f2","abstract_canon_sha256":"bee1bb37e5dbbb64e7ca7449140a621b2868943e064d1e2805028fe0ebd338a2"},"schema_version":"1.0"},"canonical_sha256":"2d2851033369640418c4a8531e04606897cbf690daa0f32b52e3a888fba6f898","source":{"kind":"arxiv","id":"astro-ph/0102144","version":4},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0102144","created_at":"2026-07-04T15:26:19Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0102144v4","created_at":"2026-07-04T15:26:19Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0102144","created_at":"2026-07-04T15:26:19Z"},{"alias_kind":"pith_short_12","alias_value":"FUUFCAZTNFSA","created_at":"2026-07-04T15:26:19Z"},{"alias_kind":"pith_short_16","alias_value":"FUUFCAZTNFSAIGGE","created_at":"2026-07-04T15:26:19Z"},{"alias_kind":"pith_short_8","alias_value":"FUUFCAZT","created_at":"2026-07-04T15:26:19Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2001:FUUFCAZTNFSAIGGEVBJR4BDANC","target":"record","payload":{"canonical_record":{"source":{"id":"astro-ph/0102144","kind":"arxiv","version":4},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2001-02-08T18:49:49Z","cross_cats_sorted":["hep-ph","hep-th"],"title_canon_sha256":"bc7a9106facac2e7b95a54067afbaf69c24632e97fca34a543ca0b243ca886f2","abstract_canon_sha256":"bee1bb37e5dbbb64e7ca7449140a621b2868943e064d1e2805028fe0ebd338a2"},"schema_version":"1.0"},"canonical_sha256":"2d2851033369640418c4a8531e04606897cbf690daa0f32b52e3a888fba6f898","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T15:26:19.579751Z","signature_b64":"9z1o9nTWqrW+8ciKf/vHTlIGe6wN06uExVCyTY3iGNohKz8xsXt/actSTh3i7tD8bx9Ma4OYq37tLYXUyi2kBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"2d2851033369640418c4a8531e04606897cbf690daa0f32b52e3a888fba6f898","last_reissued_at":"2026-07-04T15:26:19.579082Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T15:26:19.579082Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"astro-ph/0102144","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":"2026-07-04T15:26:19Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"hYlSXEUnYGVDkTUdEdToRQvJ71gnN6PLXT3dDMAARFGs3YMM4kMxu7wG+ORIEnluoyQgRp1jUFKV+EBxsVhVCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-10T21:51:54.110080Z"},"content_sha256":"ce0a9a0ffa36ec789cc0bdb1701f471b792e8b88e7d5e2ee25a7b93e8df53ae0","schema_version":"1.0","event_id":"sha256:ce0a9a0ffa36ec789cc0bdb1701f471b792e8b88e7d5e2ee25a7b93e8df53ae0"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2001:FUUFCAZTNFSAIGGEVBJR4BDANC","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Early-universe constraints on a time-varying fine structure constant","license":"","headline":"","cross_cats":["hep-ph","hep-th"],"primary_cat":"astro-ph","authors_text":"A. Melchiorri, C.J.A.P. Martins, G. Mangano, G. Miele, G. Rocha, O. Pisanti, P.P. Avelino, P.T.P. Viana, S. Esposito","submitted_at":"2001-02-08T18:49:49Z","abstract_excerpt":"Higher-dimensional theories have the remarkable feature of predicting a time (and hence redshift) dependence of the `fundamental' four dimensional constants on cosmological timescales. In this paper we update the bounds on a possible variation of the fine structure constant alpha at the time of BBN (z =10^10) and CMB (z=10^3). Using the recently-released high-resolution CMB anisotropy data and the latest estimates of primordial abundances of 4He and D, we do not find evidence for a varying alpha at more than one-sigma level at either epoch."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0102144","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/astro-ph/0102144/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-04T15:26:19Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"qzTrvhVS8jtHWdU1Qh8o6CqU5t6TvVW/Sob0XWCzN3cgPSxzuZUt8OdcCcgPRhrEqG9UjNnpigKu0RP8qc47Cw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-10T21:51:54.111151Z"},"content_sha256":"dbe240cda0e9f151d420510af012e3c5940da631f98c6ba8bb0a8e1655bd7511","schema_version":"1.0","event_id":"sha256:dbe240cda0e9f151d420510af012e3c5940da631f98c6ba8bb0a8e1655bd7511"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/FUUFCAZTNFSAIGGEVBJR4BDANC/bundle.json","state_url":"https://pith.science/pith/FUUFCAZTNFSAIGGEVBJR4BDANC/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/FUUFCAZTNFSAIGGEVBJR4BDANC/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":"2026-08-10T21:51:54Z","links":{"resolver":"https://pith.science/pith/FUUFCAZTNFSAIGGEVBJR4BDANC","bundle":"https://pith.science/pith/FUUFCAZTNFSAIGGEVBJR4BDANC/bundle.json","state":"https://pith.science/pith/FUUFCAZTNFSAIGGEVBJR4BDANC/state.json","well_known_bundle":"https://pith.science/.well-known/pith/FUUFCAZTNFSAIGGEVBJR4BDANC/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2001:FUUFCAZTNFSAIGGEVBJR4BDANC","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":"bee1bb37e5dbbb64e7ca7449140a621b2868943e064d1e2805028fe0ebd338a2","cross_cats_sorted":["hep-ph","hep-th"],"license":"","primary_cat":"astro-ph","submitted_at":"2001-02-08T18:49:49Z","title_canon_sha256":"bc7a9106facac2e7b95a54067afbaf69c24632e97fca34a543ca0b243ca886f2"},"schema_version":"1.0","source":{"id":"astro-ph/0102144","kind":"arxiv","version":4}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0102144","created_at":"2026-07-04T15:26:19Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0102144v4","created_at":"2026-07-04T15:26:19Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0102144","created_at":"2026-07-04T15:26:19Z"},{"alias_kind":"pith_short_12","alias_value":"FUUFCAZTNFSA","created_at":"2026-07-04T15:26:19Z"},{"alias_kind":"pith_short_16","alias_value":"FUUFCAZTNFSAIGGE","created_at":"2026-07-04T15:26:19Z"},{"alias_kind":"pith_short_8","alias_value":"FUUFCAZT","created_at":"2026-07-04T15:26:19Z"}],"graph_snapshots":[{"event_id":"sha256:dbe240cda0e9f151d420510af012e3c5940da631f98c6ba8bb0a8e1655bd7511","target":"graph","created_at":"2026-07-04T15:26:19Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/astro-ph/0102144/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Higher-dimensional theories have the remarkable feature of predicting a time (and hence redshift) dependence of the `fundamental' four dimensional constants on cosmological timescales. In this paper we update the bounds on a possible variation of the fine structure constant alpha at the time of BBN (z =10^10) and CMB (z=10^3). Using the recently-released high-resolution CMB anisotropy data and the latest estimates of primordial abundances of 4He and D, we do not find evidence for a varying alpha at more than one-sigma level at either epoch.","authors_text":"A. Melchiorri, C.J.A.P. Martins, G. Mangano, G. Miele, G. Rocha, O. Pisanti, P.P. Avelino, P.T.P. Viana, S. Esposito","cross_cats":["hep-ph","hep-th"],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2001-02-08T18:49:49Z","title":"Early-universe constraints on a time-varying fine structure constant"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0102144","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:ce0a9a0ffa36ec789cc0bdb1701f471b792e8b88e7d5e2ee25a7b93e8df53ae0","target":"record","created_at":"2026-07-04T15:26:19Z","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":"bee1bb37e5dbbb64e7ca7449140a621b2868943e064d1e2805028fe0ebd338a2","cross_cats_sorted":["hep-ph","hep-th"],"license":"","primary_cat":"astro-ph","submitted_at":"2001-02-08T18:49:49Z","title_canon_sha256":"bc7a9106facac2e7b95a54067afbaf69c24632e97fca34a543ca0b243ca886f2"},"schema_version":"1.0","source":{"id":"astro-ph/0102144","kind":"arxiv","version":4}},"canonical_sha256":"2d2851033369640418c4a8531e04606897cbf690daa0f32b52e3a888fba6f898","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"2d2851033369640418c4a8531e04606897cbf690daa0f32b52e3a888fba6f898","first_computed_at":"2026-07-04T15:26:19.579082Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T15:26:19.579082Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"9z1o9nTWqrW+8ciKf/vHTlIGe6wN06uExVCyTY3iGNohKz8xsXt/actSTh3i7tD8bx9Ma4OYq37tLYXUyi2kBw==","signature_status":"signed_v1","signed_at":"2026-07-04T15:26:19.579751Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/0102144","source_kind":"arxiv","source_version":4}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:ce0a9a0ffa36ec789cc0bdb1701f471b792e8b88e7d5e2ee25a7b93e8df53ae0","sha256:dbe240cda0e9f151d420510af012e3c5940da631f98c6ba8bb0a8e1655bd7511"],"state_sha256":"5abe86abd22c1239f8f4992df4c6ea8a699cc0ccbf668a8cdd57d9a7eeb89c1f"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"zCy2yC0WTqHP7gOSw8+ZgRMxwNr2hsna+VoM8y+TcRHux/KDRiIotq4LNkl1ZrnCiJime/pr+IIFMhFTeoL9BQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-10T21:51:54.138750Z","bundle_sha256":"5ef670aa7364a6b163aa7f5fe48b6ad2922e7f07a13f6245f1db7d7629457b69"}}