{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2025:U2Z5SR27ZDLIGX72BEAXWGP2BA","short_pith_number":"pith:U2Z5SR27","canonical_record":{"source":{"id":"2503.09769","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.CO","submitted_at":"2025-03-12T19:13:09Z","cross_cats_sorted":[],"title_canon_sha256":"b71288072867fbbb2a6289ca77741e2338eeb30db5bb8e864aa33ebc3ffe0e58","abstract_canon_sha256":"9ab13febe7faa7984061fee6dfbe30d30eb47104730d40a3761f8bc20e460302"},"schema_version":"1.0"},"canonical_sha256":"a6b3d9475fc8d6835ffa09017b19fa0837d50f69f20486e590704e00707c0133","source":{"kind":"arxiv","id":"2503.09769","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2503.09769","created_at":"2026-07-05T10:30:07Z"},{"alias_kind":"arxiv_version","alias_value":"2503.09769v1","created_at":"2026-07-05T10:30:07Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2503.09769","created_at":"2026-07-05T10:30:07Z"},{"alias_kind":"pith_short_12","alias_value":"U2Z5SR27ZDLI","created_at":"2026-07-05T10:30:07Z"},{"alias_kind":"pith_short_16","alias_value":"U2Z5SR27ZDLIGX72","created_at":"2026-07-05T10:30:07Z"},{"alias_kind":"pith_short_8","alias_value":"U2Z5SR27","created_at":"2026-07-05T10:30:07Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2025:U2Z5SR27ZDLIGX72BEAXWGP2BA","target":"record","payload":{"canonical_record":{"source":{"id":"2503.09769","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.CO","submitted_at":"2025-03-12T19:13:09Z","cross_cats_sorted":[],"title_canon_sha256":"b71288072867fbbb2a6289ca77741e2338eeb30db5bb8e864aa33ebc3ffe0e58","abstract_canon_sha256":"9ab13febe7faa7984061fee6dfbe30d30eb47104730d40a3761f8bc20e460302"},"schema_version":"1.0"},"canonical_sha256":"a6b3d9475fc8d6835ffa09017b19fa0837d50f69f20486e590704e00707c0133","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T10:30:07.910757Z","signature_b64":"DvpwuA8Trwdv9df2+pJaNsalU/YWy3aLXHwqNMAjLjT9mwiLB0Z36f+U6sBjYcVPpt6UdwAkmqVU4b+mrmL5Aw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a6b3d9475fc8d6835ffa09017b19fa0837d50f69f20486e590704e00707c0133","last_reissued_at":"2026-07-05T10:30:07.909929Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T10:30:07.909929Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2503.09769","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T10:30:07Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7atUh2F89ExfqBgSiSpbjVtUrNILXi4D5Q2lj+IY1iMRp47zSyDumIc/no8MHsIVYPnKmQqu/2y0YNnYAPvqDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-04T10:34:57.525676Z"},"content_sha256":"cfb5513cc4c3cfebcd588241e381b97dcb7d1b4ad6af73057271c254049a5fbc","schema_version":"1.0","event_id":"sha256:cfb5513cc4c3cfebcd588241e381b97dcb7d1b4ad6af73057271c254049a5fbc"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2025:U2Z5SR27ZDLIGX72BEAXWGP2BA","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Cosmological tensions and $\\mathcal{Q}_{\\rm CDM}$ as an alternative to $\\Lambda$CDM","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"Amin Aboubrahim, Pran Nath","submitted_at":"2025-03-12T19:13:09Z","abstract_excerpt":"The Standard Model of cosmology, $\\Lambda$CDM, while enormously successful, is currently unable to account for several cosmological anomalies the most prominent of which are in the measurements of the Hubble parameter and $S_8$. Additionally, the inclusion of the cosmological constant is theoretically unappealing. This has lead to extensions of the model such as the use of fluid equations for interacting dark matter and dark energy which, however, are ad hoc since they do not appear to arise from a Lagrangian. Recently, we have proposed $\\mathcal{Q}_{\\rm CDM}$ as an alternative to $\\Lambda$CDM"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2503.09769","kind":"arxiv","version":1},"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/2503.09769/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":"2026-07-05T10:30:07Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"MoBcnb8c4byNPVO7l7uAdrl/AtwNZLLDKJ7Y8OwpiU5lJkgqVDfAn7hItqnmNoHrPzh2Qi4h4UXwmiY26UMnAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-04T10:34:57.526175Z"},"content_sha256":"8d081ec6a222ad530818561ed2a93efc491468579715c5db1b5e5ca31c9b16d3","schema_version":"1.0","event_id":"sha256:8d081ec6a222ad530818561ed2a93efc491468579715c5db1b5e5ca31c9b16d3"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/U2Z5SR27ZDLIGX72BEAXWGP2BA/bundle.json","state_url":"https://pith.science/pith/U2Z5SR27ZDLIGX72BEAXWGP2BA/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/U2Z5SR27ZDLIGX72BEAXWGP2BA/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":"2026-08-04T10:34:57Z","links":{"resolver":"https://pith.science/pith/U2Z5SR27ZDLIGX72BEAXWGP2BA","bundle":"https://pith.science/pith/U2Z5SR27ZDLIGX72BEAXWGP2BA/bundle.json","state":"https://pith.science/pith/U2Z5SR27ZDLIGX72BEAXWGP2BA/state.json","well_known_bundle":"https://pith.science/.well-known/pith/U2Z5SR27ZDLIGX72BEAXWGP2BA/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:U2Z5SR27ZDLIGX72BEAXWGP2BA","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":"9ab13febe7faa7984061fee6dfbe30d30eb47104730d40a3761f8bc20e460302","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.CO","submitted_at":"2025-03-12T19:13:09Z","title_canon_sha256":"b71288072867fbbb2a6289ca77741e2338eeb30db5bb8e864aa33ebc3ffe0e58"},"schema_version":"1.0","source":{"id":"2503.09769","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2503.09769","created_at":"2026-07-05T10:30:07Z"},{"alias_kind":"arxiv_version","alias_value":"2503.09769v1","created_at":"2026-07-05T10:30:07Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2503.09769","created_at":"2026-07-05T10:30:07Z"},{"alias_kind":"pith_short_12","alias_value":"U2Z5SR27ZDLI","created_at":"2026-07-05T10:30:07Z"},{"alias_kind":"pith_short_16","alias_value":"U2Z5SR27ZDLIGX72","created_at":"2026-07-05T10:30:07Z"},{"alias_kind":"pith_short_8","alias_value":"U2Z5SR27","created_at":"2026-07-05T10:30:07Z"}],"graph_snapshots":[{"event_id":"sha256:8d081ec6a222ad530818561ed2a93efc491468579715c5db1b5e5ca31c9b16d3","target":"graph","created_at":"2026-07-05T10:30:07Z","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/2503.09769/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The Standard Model of cosmology, $\\Lambda$CDM, while enormously successful, is currently unable to account for several cosmological anomalies the most prominent of which are in the measurements of the Hubble parameter and $S_8$. Additionally, the inclusion of the cosmological constant is theoretically unappealing. This has lead to extensions of the model such as the use of fluid equations for interacting dark matter and dark energy which, however, are ad hoc since they do not appear to arise from a Lagrangian. Recently, we have proposed $\\mathcal{Q}_{\\rm CDM}$ as an alternative to $\\Lambda$CDM","authors_text":"Amin Aboubrahim, Pran Nath","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.CO","submitted_at":"2025-03-12T19:13:09Z","title":"Cosmological tensions and $\\mathcal{Q}_{\\rm CDM}$ as an alternative to $\\Lambda$CDM"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2503.09769","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:cfb5513cc4c3cfebcd588241e381b97dcb7d1b4ad6af73057271c254049a5fbc","target":"record","created_at":"2026-07-05T10:30:07Z","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":"9ab13febe7faa7984061fee6dfbe30d30eb47104730d40a3761f8bc20e460302","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.CO","submitted_at":"2025-03-12T19:13:09Z","title_canon_sha256":"b71288072867fbbb2a6289ca77741e2338eeb30db5bb8e864aa33ebc3ffe0e58"},"schema_version":"1.0","source":{"id":"2503.09769","kind":"arxiv","version":1}},"canonical_sha256":"a6b3d9475fc8d6835ffa09017b19fa0837d50f69f20486e590704e00707c0133","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a6b3d9475fc8d6835ffa09017b19fa0837d50f69f20486e590704e00707c0133","first_computed_at":"2026-07-05T10:30:07.909929Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T10:30:07.909929Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"DvpwuA8Trwdv9df2+pJaNsalU/YWy3aLXHwqNMAjLjT9mwiLB0Z36f+U6sBjYcVPpt6UdwAkmqVU4b+mrmL5Aw==","signature_status":"signed_v1","signed_at":"2026-07-05T10:30:07.910757Z","signed_message":"canonical_sha256_bytes"},"source_id":"2503.09769","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:cfb5513cc4c3cfebcd588241e381b97dcb7d1b4ad6af73057271c254049a5fbc","sha256:8d081ec6a222ad530818561ed2a93efc491468579715c5db1b5e5ca31c9b16d3"],"state_sha256":"e9f82c5417d633284545f4294a40f14dcb38cbeda155dd8a091a398fd9055c0b"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"v2DUGS+Y76/zDAyqSbavXdKSQK7wbQOODNfiAoT3MM60IBkv2eZbmJ5I2iPdeBjpHXUPZ9RJd/dhpR7Fi90cDg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-04T10:34:57.529837Z","bundle_sha256":"30c596dc33cbd1594d2c04fc30441fda6bf2425586d57977629cae326d88d823"}}