{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:TLWXPQJL6WOTBAUYRY6U6JADGU","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":"3b19634fe5e69ced2d234c4cbbbb90ffe33f9e305dc0b9ed92a901342391be2c","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.CO","submitted_at":"2026-03-03T19:25:24Z","title_canon_sha256":"49ded0b9a40c183237c8734a6cb349d869f3449165bab84db9e311aaf210dec8"},"schema_version":"1.0","source":{"id":"2603.03468","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2603.03468","created_at":"2026-07-02T01:18:06Z"},{"alias_kind":"arxiv_version","alias_value":"2603.03468v2","created_at":"2026-07-02T01:18:06Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2603.03468","created_at":"2026-07-02T01:18:06Z"},{"alias_kind":"pith_short_12","alias_value":"TLWXPQJL6WOT","created_at":"2026-07-02T01:18:06Z"},{"alias_kind":"pith_short_16","alias_value":"TLWXPQJL6WOTBAUY","created_at":"2026-07-02T01:18:06Z"},{"alias_kind":"pith_short_8","alias_value":"TLWXPQJL","created_at":"2026-07-02T01:18:06Z"}],"graph_snapshots":[{"event_id":"sha256:5b0c2288aa2962dee6897fbfdb2e51c41682b245bbd00c219adb41d8ec9206df","target":"graph","created_at":"2026-07-02T01:18:06Z","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/2603.03468/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"In this work, we present comprehensive observational constraints on the time-varying vacuum Lambda(t)CDM cosmology using the latest baryon acoustic oscillation (BAO) data from Dark Energy Spectroscopic Instrument (DESI) Data Release 2 measurements in combination with cosmic chronometer H(z) data. We explicitly quantify the impact of vacuum dynamics on the expansion history, the total effective equation of state parameter of the unified cosmic fluid, the effective dark energy equation of state parameter, and the deceleration parameter in the spatially flat Lambda(t)CDM model. We perform a full ","authors_text":"Olga Avsajanishvili","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.CO","submitted_at":"2026-03-03T19:25:24Z","title":"Background dynamics and observational constraints of flat and non-flat $\\Lambda(t)$CDM models from $H(z)$ and DESI DR2 BAO measurements"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2603.03468","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":"sha256:114bfb8cba0416504530743f5fae96a349692e2fe014e6ca052b8472dffdaca4","target":"record","created_at":"2026-07-02T01:18:06Z","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":"3b19634fe5e69ced2d234c4cbbbb90ffe33f9e305dc0b9ed92a901342391be2c","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.CO","submitted_at":"2026-03-03T19:25:24Z","title_canon_sha256":"49ded0b9a40c183237c8734a6cb349d869f3449165bab84db9e311aaf210dec8"},"schema_version":"1.0","source":{"id":"2603.03468","kind":"arxiv","version":2}},"canonical_sha256":"9aed77c12bf59d3082988e3d4f24033507b358442bc6977dbba2dc50b264d02e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"9aed77c12bf59d3082988e3d4f24033507b358442bc6977dbba2dc50b264d02e","first_computed_at":"2026-07-02T01:18:06.940152Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-02T01:18:06.940152Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"e8XsmnD9um3hOak8+ZF45iQ8CnjwE0BwV41XS0Q4Q1/1ihCvnCaGnxU/pLzdKoQxgQnDxFc0sKsadm9H0b6sCQ==","signature_status":"signed_v1","signed_at":"2026-07-02T01:18:06.940631Z","signed_message":"canonical_sha256_bytes"},"source_id":"2603.03468","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:114bfb8cba0416504530743f5fae96a349692e2fe014e6ca052b8472dffdaca4","sha256:5b0c2288aa2962dee6897fbfdb2e51c41682b245bbd00c219adb41d8ec9206df"],"state_sha256":"1dc94ee629d2a47d559276fef35718f2f391db03e0a9aeb1bb7ad33d9469908a"}