{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2022:DP43F6RB3YADIPCGDIQFU4DDQS","short_pith_number":"pith:DP43F6RB","schema_version":"1.0","canonical_sha256":"1bf9b2fa21de00343c461a205a706384ad26c4c87f254bf496dda00b38f58f01","source":{"kind":"arxiv","id":"2208.08101","version":1},"attestation_state":"computed","paper":{"title":"Can primordial parity violation explain the observed cosmic birefringence?","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["gr-qc","hep-ph"],"primary_cat":"astro-ph.CO","authors_text":"Maresuke Shiraishi, Shuichiro Yokoyama, Tomohiro Fujita, Yuto Minami","submitted_at":"2022-08-17T06:36:02Z","abstract_excerpt":"Recently, the cross-correlation between $E$- and $B$-mode polarization of the cosmic microwave background (CMB), which is well explained by cosmic birefringence with rotation angle $\\beta\\approx 0.3$ deg, has been found in CMB polarization data. We carefully investigate the possibility of explaining the observed $EB$ correlation by the primordial chiral gravitational waves (CGWs), which can be generated in the parity-violating theories in the primordial Universe. We found that the CGWs scenario does not work due to the overproduction of the $BB$ auto-correlation which far exceeds the observed "},"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":"2208.08101","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2022-08-17T06:36:02Z","cross_cats_sorted":["gr-qc","hep-ph"],"title_canon_sha256":"39fc1f83d74f4fa283c290384dbfe8bd993110df3b134d14088d8af26a9e7cbe","abstract_canon_sha256":"60ff49b19bc96afeb8e86518cf16ca0e65a26acda5dabdf64fd949ab04bd8c68"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T05:22:53.549429Z","signature_b64":"k7xCeRXysTMvDyjc2J8xlH1C/fCaG4OtlcQw1ipOVdbLiQr1i7MqvR/xOlYXy4wq6Z87E9tsozmRhkcb/ypzAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"1bf9b2fa21de00343c461a205a706384ad26c4c87f254bf496dda00b38f58f01","last_reissued_at":"2026-07-05T05:22:53.548895Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T05:22:53.548895Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Can primordial parity violation explain the observed cosmic birefringence?","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["gr-qc","hep-ph"],"primary_cat":"astro-ph.CO","authors_text":"Maresuke Shiraishi, Shuichiro Yokoyama, Tomohiro Fujita, Yuto Minami","submitted_at":"2022-08-17T06:36:02Z","abstract_excerpt":"Recently, the cross-correlation between $E$- and $B$-mode polarization of the cosmic microwave background (CMB), which is well explained by cosmic birefringence with rotation angle $\\beta\\approx 0.3$ deg, has been found in CMB polarization data. We carefully investigate the possibility of explaining the observed $EB$ correlation by the primordial chiral gravitational waves (CGWs), which can be generated in the parity-violating theories in the primordial Universe. We found that the CGWs scenario does not work due to the overproduction of the $BB$ auto-correlation which far exceeds the observed "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2208.08101","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/2208.08101/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":"2208.08101","created_at":"2026-07-05T05:22:53.548964+00:00"},{"alias_kind":"arxiv_version","alias_value":"2208.08101v1","created_at":"2026-07-05T05:22:53.548964+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2208.08101","created_at":"2026-07-05T05:22:53.548964+00:00"},{"alias_kind":"pith_short_12","alias_value":"DP43F6RB3YAD","created_at":"2026-07-05T05:22:53.548964+00:00"},{"alias_kind":"pith_short_16","alias_value":"DP43F6RB3YADIPCG","created_at":"2026-07-05T05:22:53.548964+00:00"},{"alias_kind":"pith_short_8","alias_value":"DP43F6RB","created_at":"2026-07-05T05:22:53.548964+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":1,"internal_anchor_count":0,"sample":[{"citing_arxiv_id":"2605.13016","citing_title":"Revisiting constraints on primordial vector modes and implications for sourced magnetic fields and observed $EB$ power spectrum","ref_index":40,"is_internal_anchor":false}]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/DP43F6RB3YADIPCGDIQFU4DDQS","json":"https://pith.science/pith/DP43F6RB3YADIPCGDIQFU4DDQS.json","graph_json":"https://pith.science/api/pith-number/DP43F6RB3YADIPCGDIQFU4DDQS/graph.json","events_json":"https://pith.science/api/pith-number/DP43F6RB3YADIPCGDIQFU4DDQS/events.json","paper":"https://pith.science/paper/DP43F6RB"},"agent_actions":{"view_html":"https://pith.science/pith/DP43F6RB3YADIPCGDIQFU4DDQS","download_json":"https://pith.science/pith/DP43F6RB3YADIPCGDIQFU4DDQS.json","view_paper":"https://pith.science/paper/DP43F6RB","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2208.08101&json=true","fetch_graph":"https://pith.science/api/pith-number/DP43F6RB3YADIPCGDIQFU4DDQS/graph.json","fetch_events":"https://pith.science/api/pith-number/DP43F6RB3YADIPCGDIQFU4DDQS/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/DP43F6RB3YADIPCGDIQFU4DDQS/action/timestamp_anchor","attest_storage":"https://pith.science/pith/DP43F6RB3YADIPCGDIQFU4DDQS/action/storage_attestation","attest_author":"https://pith.science/pith/DP43F6RB3YADIPCGDIQFU4DDQS/action/author_attestation","sign_citation":"https://pith.science/pith/DP43F6RB3YADIPCGDIQFU4DDQS/action/citation_signature","submit_replication":"https://pith.science/pith/DP43F6RB3YADIPCGDIQFU4DDQS/action/replication_record"}},"created_at":"2026-07-05T05:22:53.548964+00:00","updated_at":"2026-07-05T05:22:53.548964+00:00"}