{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2026:YKWLORS7OOI4YUK5SWUB7BJUQS","short_pith_number":"pith:YKWLORS7","schema_version":"1.0","canonical_sha256":"c2acb7465f7391cc515d95a81f853484abc24a9bdafa23101969e2583ce591c8","source":{"kind":"arxiv","id":"2601.21274","version":2},"attestation_state":"computed","paper":{"title":"Realizing the phantom-divide crossing with vector and scalar fields","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["gr-qc","hep-ph","hep-th"],"primary_cat":"astro-ph.CO","authors_text":"Shinji Tsujikawa","submitted_at":"2026-01-29T05:11:07Z","abstract_excerpt":"In generalized Proca theories, characterized by a vector field with broken $U(1)$ gauge invariance, late-time cosmic acceleration can be realized with a dark energy equation of state in the regime $w_{\\rm DE} < -1$. In such scenarios, however, a phantom-divide crossing, as recently suggested by DESI observations, is not achieved without encountering theoretical inconsistencies. We incorporate a canonical scalar field with a potential, in addition to the vector field, and show that the phantom-divide crossing from $w_{\\rm DE} < -1$ to $w_{\\rm DE} > -1$ can occur at low redshifts. We propose a m"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"2601.21274","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.CO","submitted_at":"2026-01-29T05:11:07Z","cross_cats_sorted":["gr-qc","hep-ph","hep-th"],"title_canon_sha256":"1fa8d3b95802d1c26d6f000eb0f75be792258b48a5570c7866dc9c7cddb227f0","abstract_canon_sha256":"f2e7639cb061a24f92be637010daddd75b532f56e006e7762555c74c0a384b0c"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-06-02T01:03:41.374347Z","signature_b64":"4Xsbk3DCJdE6IbU8XqvjKGzSf0GO9S+07RIhgZkh4R0Q1rl5ACSjiEqGXSB9VggIAM4IXk2XMFEGkkYzqznhBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"c2acb7465f7391cc515d95a81f853484abc24a9bdafa23101969e2583ce591c8","last_reissued_at":"2026-06-02T01:03:41.373771Z","signature_status":"signed_v1","first_computed_at":"2026-06-02T01:03:41.373771Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Realizing the phantom-divide crossing with vector and scalar fields","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["gr-qc","hep-ph","hep-th"],"primary_cat":"astro-ph.CO","authors_text":"Shinji Tsujikawa","submitted_at":"2026-01-29T05:11:07Z","abstract_excerpt":"In generalized Proca theories, characterized by a vector field with broken $U(1)$ gauge invariance, late-time cosmic acceleration can be realized with a dark energy equation of state in the regime $w_{\\rm DE} < -1$. In such scenarios, however, a phantom-divide crossing, as recently suggested by DESI observations, is not achieved without encountering theoretical inconsistencies. We incorporate a canonical scalar field with a potential, in addition to the vector field, and show that the phantom-divide crossing from $w_{\\rm DE} < -1$ to $w_{\\rm DE} > -1$ can occur at low redshifts. We propose a m"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2601.21274","kind":"arxiv","version":2},"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/2601.21274/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"},"aliases":[{"alias_kind":"arxiv","alias_value":"2601.21274","created_at":"2026-06-02T01:03:41.373841+00:00"},{"alias_kind":"arxiv_version","alias_value":"2601.21274v2","created_at":"2026-06-02T01:03:41.373841+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2601.21274","created_at":"2026-06-02T01:03:41.373841+00:00"},{"alias_kind":"pith_short_12","alias_value":"YKWLORS7OOI4","created_at":"2026-06-02T01:03:41.373841+00:00"},{"alias_kind":"pith_short_16","alias_value":"YKWLORS7OOI4YUK5","created_at":"2026-06-02T01:03:41.373841+00:00"},{"alias_kind":"pith_short_8","alias_value":"YKWLORS7","created_at":"2026-06-02T01:03:41.373841+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":1,"internal_anchor_count":1,"sample":[{"citing_arxiv_id":"2605.30259","citing_title":"Late-time Quantum Vacuum Decay and its Cosmological Implications","ref_index":55,"is_internal_anchor":true}]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/YKWLORS7OOI4YUK5SWUB7BJUQS","json":"https://pith.science/pith/YKWLORS7OOI4YUK5SWUB7BJUQS.json","graph_json":"https://pith.science/api/pith-number/YKWLORS7OOI4YUK5SWUB7BJUQS/graph.json","events_json":"https://pith.science/api/pith-number/YKWLORS7OOI4YUK5SWUB7BJUQS/events.json","paper":"https://pith.science/paper/YKWLORS7"},"agent_actions":{"view_html":"https://pith.science/pith/YKWLORS7OOI4YUK5SWUB7BJUQS","download_json":"https://pith.science/pith/YKWLORS7OOI4YUK5SWUB7BJUQS.json","view_paper":"https://pith.science/paper/YKWLORS7","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2601.21274&json=true","fetch_graph":"https://pith.science/api/pith-number/YKWLORS7OOI4YUK5SWUB7BJUQS/graph.json","fetch_events":"https://pith.science/api/pith-number/YKWLORS7OOI4YUK5SWUB7BJUQS/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/YKWLORS7OOI4YUK5SWUB7BJUQS/action/timestamp_anchor","attest_storage":"https://pith.science/pith/YKWLORS7OOI4YUK5SWUB7BJUQS/action/storage_attestation","attest_author":"https://pith.science/pith/YKWLORS7OOI4YUK5SWUB7BJUQS/action/author_attestation","sign_citation":"https://pith.science/pith/YKWLORS7OOI4YUK5SWUB7BJUQS/action/citation_signature","submit_replication":"https://pith.science/pith/YKWLORS7OOI4YUK5SWUB7BJUQS/action/replication_record"}},"created_at":"2026-06-02T01:03:41.373841+00:00","updated_at":"2026-06-02T01:03:41.373841+00:00"}