{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2023:S36P7D2CMAAVSUEIJZNOZOEX32","short_pith_number":"pith:S36P7D2C","schema_version":"1.0","canonical_sha256":"96fcff8f4260015950884e5aecb897de941675c38c3b58849713bad62a8f022f","source":{"kind":"arxiv","id":"2308.16044","version":1},"attestation_state":"computed","paper":{"title":"Alleviating $H_0$ tension in scalar-tensor and bi-scalar-tensor theories","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO","hep-th"],"primary_cat":"gr-qc","authors_text":"Emmanuel N. Saridakis, Maria Petronikolou","submitted_at":"2023-08-30T14:06:37Z","abstract_excerpt":"We investigate scalar-tensor and bi-scalar-tensor modified theories of gravity that can alleviate the $H_0$ tension. In the first class of theories we show that choosing particular models with shift-symmetric friction term we are able to alleviate the tension by obtaining smaller effective Newton's constant at intermediate times, a feature that cannot be easily obtained in modified gravity. In the second class of theories, which involve two extra propagating degrees of freedom, we show that the $H_0$ tension can be alleviated, and the mechanism behind it is the phantom behavior of the effectiv"},"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":"2308.16044","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2023-08-30T14:06:37Z","cross_cats_sorted":["astro-ph.CO","hep-th"],"title_canon_sha256":"9c2566ed37067c8337ad2fe0499654f7ba161818506e3c6aeb8bdabe33bf02bc","abstract_canon_sha256":"37b19d73f41940032f4a817d7f89f3ec7dd2576c53ce637156520d83c6d445ce"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T06:46:17.636516Z","signature_b64":"z42u8Z2qf2SVEtwSbXw6Z2s+se7MtkGbBJPvXD8CNEivIJ5n+qGPZt7zRa6e9TgGMUUtsxfHflZgwPg6RuswAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"96fcff8f4260015950884e5aecb897de941675c38c3b58849713bad62a8f022f","last_reissued_at":"2026-07-05T06:46:17.636023Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T06:46:17.636023Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Alleviating $H_0$ tension in scalar-tensor and bi-scalar-tensor theories","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO","hep-th"],"primary_cat":"gr-qc","authors_text":"Emmanuel N. Saridakis, Maria Petronikolou","submitted_at":"2023-08-30T14:06:37Z","abstract_excerpt":"We investigate scalar-tensor and bi-scalar-tensor modified theories of gravity that can alleviate the $H_0$ tension. In the first class of theories we show that choosing particular models with shift-symmetric friction term we are able to alleviate the tension by obtaining smaller effective Newton's constant at intermediate times, a feature that cannot be easily obtained in modified gravity. In the second class of theories, which involve two extra propagating degrees of freedom, we show that the $H_0$ tension can be alleviated, and the mechanism behind it is the phantom behavior of the effectiv"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2308.16044","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/2308.16044/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":"2308.16044","created_at":"2026-07-05T06:46:17.636080+00:00"},{"alias_kind":"arxiv_version","alias_value":"2308.16044v1","created_at":"2026-07-05T06:46:17.636080+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2308.16044","created_at":"2026-07-05T06:46:17.636080+00:00"},{"alias_kind":"pith_short_12","alias_value":"S36P7D2CMAAV","created_at":"2026-07-05T06:46:17.636080+00:00"},{"alias_kind":"pith_short_16","alias_value":"S36P7D2CMAAVSUEI","created_at":"2026-07-05T06:46:17.636080+00:00"},{"alias_kind":"pith_short_8","alias_value":"S36P7D2C","created_at":"2026-07-05T06:46:17.636080+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/S36P7D2CMAAVSUEIJZNOZOEX32","json":"https://pith.science/pith/S36P7D2CMAAVSUEIJZNOZOEX32.json","graph_json":"https://pith.science/api/pith-number/S36P7D2CMAAVSUEIJZNOZOEX32/graph.json","events_json":"https://pith.science/api/pith-number/S36P7D2CMAAVSUEIJZNOZOEX32/events.json","paper":"https://pith.science/paper/S36P7D2C"},"agent_actions":{"view_html":"https://pith.science/pith/S36P7D2CMAAVSUEIJZNOZOEX32","download_json":"https://pith.science/pith/S36P7D2CMAAVSUEIJZNOZOEX32.json","view_paper":"https://pith.science/paper/S36P7D2C","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2308.16044&json=true","fetch_graph":"https://pith.science/api/pith-number/S36P7D2CMAAVSUEIJZNOZOEX32/graph.json","fetch_events":"https://pith.science/api/pith-number/S36P7D2CMAAVSUEIJZNOZOEX32/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/S36P7D2CMAAVSUEIJZNOZOEX32/action/timestamp_anchor","attest_storage":"https://pith.science/pith/S36P7D2CMAAVSUEIJZNOZOEX32/action/storage_attestation","attest_author":"https://pith.science/pith/S36P7D2CMAAVSUEIJZNOZOEX32/action/author_attestation","sign_citation":"https://pith.science/pith/S36P7D2CMAAVSUEIJZNOZOEX32/action/citation_signature","submit_replication":"https://pith.science/pith/S36P7D2CMAAVSUEIJZNOZOEX32/action/replication_record"}},"created_at":"2026-07-05T06:46:17.636080+00:00","updated_at":"2026-07-05T06:46:17.636080+00:00"}