{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2026:5NUXLXMHFO22ZI6LJOW6HKIOSP","short_pith_number":"pith:5NUXLXMH","schema_version":"1.0","canonical_sha256":"eb6975dd872bb5aca3cb4bade3a90e93f6b8bfbb7415012ac0c56e1926677ac7","source":{"kind":"arxiv","id":"2605.16721","version":1},"attestation_state":"computed","paper":{"title":"Towards Measuring the CP-Violating Phase with Atmospheric Neutrinos","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"An up-down flux ratio of sub-GeV atmospheric neutrinos can measure the CP-violating phase with sensitivity that exceeds T2HK near 90° and 270°.","cross_cats":[],"primary_cat":"hep-ph","authors_text":"Ho Man Yim, John F. Beacom, Matthew J. Dolan, Nicole F. Bell, Stephan A. Meighen-Berger","submitted_at":"2026-05-16T00:07:50Z","abstract_excerpt":"We propose a new approach to measuring the CP-violating phase in neutrino mixing using atmospheric neutrinos, differing significantly from prior work. We develop an up-down flux ratio for sub-GeV atmospheric neutrinos that incorporates realistic detection effects and reduces systematic uncertainties. For the example of Hyper-Kamiokande -- the first experiment with sufficient atmospheric-neutrino statistics in this energy range -- our approach can surpass the sensitivity of the Tokai to Hyper-Kamiokande (T2HK) long-baseline experiment near $\\mathit{\\delta_\\mathrm{CP} = 90^\\circ}$ and $\\mathit{2"},"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":true,"formal_links_present":true},"canonical_record":{"source":{"id":"2605.16721","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2026-05-16T00:07:50Z","cross_cats_sorted":[],"title_canon_sha256":"5c14b9052a4aa5920ea8d6de10c2b2da30c03ffab532215b393e60a8dd3e6071","abstract_canon_sha256":"f2cef6ba1adc1568fd03c23c4040656087fab9ef508a17554168649ba1b79ede"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-20T00:02:38.394313Z","signature_b64":"LZlT1J19D2UJrDhxS4BThZS+a1Ha18k9C+vtK1q37oLqeTvfhPWGNchf1kZhVaR4ni0OEp90MKvIufP7bo83Dw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"eb6975dd872bb5aca3cb4bade3a90e93f6b8bfbb7415012ac0c56e1926677ac7","last_reissued_at":"2026-05-20T00:02:38.393444Z","signature_status":"signed_v1","first_computed_at":"2026-05-20T00:02:38.393444Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Towards Measuring the CP-Violating Phase with Atmospheric Neutrinos","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"An up-down flux ratio of sub-GeV atmospheric neutrinos can measure the CP-violating phase with sensitivity that exceeds T2HK near 90° and 270°.","cross_cats":[],"primary_cat":"hep-ph","authors_text":"Ho Man Yim, John F. Beacom, Matthew J. Dolan, Nicole F. Bell, Stephan A. Meighen-Berger","submitted_at":"2026-05-16T00:07:50Z","abstract_excerpt":"We propose a new approach to measuring the CP-violating phase in neutrino mixing using atmospheric neutrinos, differing significantly from prior work. We develop an up-down flux ratio for sub-GeV atmospheric neutrinos that incorporates realistic detection effects and reduces systematic uncertainties. For the example of Hyper-Kamiokande -- the first experiment with sufficient atmospheric-neutrino statistics in this energy range -- our approach can surpass the sensitivity of the Tokai to Hyper-Kamiokande (T2HK) long-baseline experiment near $\\mathit{\\delta_\\mathrm{CP} = 90^\\circ}$ and $\\mathit{2"},"claims":{"count":4,"items":[{"kind":"strongest_claim","text":"For the example of Hyper-Kamiokande, our approach can surpass the sensitivity of the Tokai to Hyper-Kamiokande (T2HK) long-baseline experiment near δ_CP = 90° and 270°.","source":"verdict.strongest_claim","status":"machine_extracted","claim_id":"C1","attestation":"unclaimed"},{"kind":"weakest_assumption","text":"Realizing this potential will require additional, but realistic, work to reduce theoretical uncertainties. This premise enters in the final paragraph of the abstract and is load-bearing because the claimed sensitivity gain is stated to depend on successfully lowering those uncertainties without new systematics.","source":"verdict.weakest_assumption","status":"machine_extracted","claim_id":"C2","attestation":"unclaimed"},{"kind":"one_line_summary","text":"A new up-down flux ratio for sub-GeV atmospheric neutrinos enables Hyper-Kamiokande to measure the CP-violating phase with sensitivity surpassing T2HK near delta_CP of 90 and 270 degrees.","source":"verdict.one_line_summary","status":"machine_extracted","claim_id":"C3","attestation":"unclaimed"},{"kind":"headline","text":"An up-down flux ratio of sub-GeV atmospheric neutrinos can measure the CP-violating phase with sensitivity that exceeds T2HK near 90° and 270°.","source":"verdict.pith_extraction.headline","status":"machine_extracted","claim_id":"C4","attestation":"unclaimed"}],"snapshot_sha256":"92e4df85e6bd474fdfeff7258c6000a3b67c9fa5a2ca94d7c6c7ad607a7f1d4d"},"source":{"id":"2605.16721","kind":"arxiv","version":1},"verdict":{"id":"88b326cc-fed4-47a5-8f1d-af576e31c6c1","model_set":{"reader":"grok-4.3"},"created_at":"2026-05-19T21:39:39.827472Z","strongest_claim":"For the example of Hyper-Kamiokande, our approach can surpass the sensitivity of the Tokai to Hyper-Kamiokande (T2HK) long-baseline experiment near δ_CP = 90° and 270°.","one_line_summary":"A new up-down flux ratio for sub-GeV atmospheric neutrinos enables Hyper-Kamiokande to measure the CP-violating phase with sensitivity surpassing T2HK near delta_CP of 90 and 270 degrees.","pipeline_version":"pith-pipeline@v0.9.0","weakest_assumption":"Realizing this potential will require additional, but realistic, work to reduce theoretical uncertainties. This premise enters in the final paragraph of the abstract and is load-bearing because the claimed sensitivity gain is stated to depend on successfully lowering those uncertainties without new systematics.","pith_extraction_headline":"An up-down flux ratio of sub-GeV atmospheric neutrinos can measure the CP-violating phase with sensitivity that exceeds T2HK near 90° and 270°."},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2605.16721/integrity.json","findings":[],"available":true,"detectors_run":[{"name":"doi_title_agreement","ran_at":"2026-05-19T22:01:23.110782Z","status":"completed","version":"1.0.0","findings_count":0},{"name":"doi_compliance","ran_at":"2026-05-19T21:51:05.484516Z","status":"completed","version":"1.0.0","findings_count":0},{"name":"claim_evidence","ran_at":"2026-05-19T19:01:56.350822Z","status":"completed","version":"1.0.0","findings_count":0},{"name":"ai_meta_artifact","ran_at":"2026-05-19T18:33:26.475544Z","status":"skipped","version":"1.0.0","findings_count":0}],"snapshot_sha256":"6dce5c8bad6b4417530c7b34f871a047d20af8930b906b7c1e792f68ad4ab5b8"},"references":{"count":89,"sample":[{"doi":"","year":null,"title":"These points were largely known","work_id":"7f7f1578-fe95-416f-90f2-61831aade258","ref_index":1,"cited_arxiv_id":"","is_internal_anchor":false},{"doi":"","year":null,"title":"The angular ranges are chosen to reduce the smearing between up and downgo- ing samples while maintaining good statistics","work_id":"92f699a8-a655-4c7b-9bcf-255bd5583047","ref_index":2,"cited_arxiv_id":"","is_internal_anchor":false},{"doi":"","year":null,"title":"The remaining parameters (not shown),θ 12 and ∆m2 32, have an even smaller impact due to the averaging of oscillation phases over energy and zenith angle","work_id":"26a26095-221d-4298-a208-f23c5432e468","ref_index":3,"cited_arxiv_id":"","is_internal_anchor":false},{"doi":"","year":1976,"title":"Steigman, Observational tests of antimatter cosmolo- gies, Ann","work_id":"e63c8655-53e0-4cc4-8bb4-c32fba14e81a","ref_index":4,"cited_arxiv_id":"","is_internal_anchor":false},{"doi":"","year":2003,"title":"The origin of the matter-antimatter asymmetry","work_id":"de5a3792-96cb-4318-a000-cdfd8a42e2b5","ref_index":5,"cited_arxiv_id":"hep-ph/0303065","is_internal_anchor":true}],"resolved_work":89,"snapshot_sha256":"c5c64db337b3bce5b1c6e4bef451d91c34a99954a5a8ef48e71c1fde2a6b91a6","internal_anchors":33},"formal_canon":{"evidence_count":1,"snapshot_sha256":"64981780c26a8bf46946e9f7555d8cd6eacbb046623f690fb7660719748e8d67"},"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":"2605.16721","created_at":"2026-05-20T00:02:38.393600+00:00"},{"alias_kind":"arxiv_version","alias_value":"2605.16721v1","created_at":"2026-05-20T00:02:38.393600+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2605.16721","created_at":"2026-05-20T00:02:38.393600+00:00"},{"alias_kind":"pith_short_12","alias_value":"5NUXLXMHFO22","created_at":"2026-05-20T00:02:38.393600+00:00"},{"alias_kind":"pith_short_16","alias_value":"5NUXLXMHFO22ZI6L","created_at":"2026-05-20T00:02:38.393600+00:00"},{"alias_kind":"pith_short_8","alias_value":"5NUXLXMH","created_at":"2026-05-20T00:02:38.393600+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":1,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/5NUXLXMHFO22ZI6LJOW6HKIOSP","json":"https://pith.science/pith/5NUXLXMHFO22ZI6LJOW6HKIOSP.json","graph_json":"https://pith.science/api/pith-number/5NUXLXMHFO22ZI6LJOW6HKIOSP/graph.json","events_json":"https://pith.science/api/pith-number/5NUXLXMHFO22ZI6LJOW6HKIOSP/events.json","paper":"https://pith.science/paper/5NUXLXMH"},"agent_actions":{"view_html":"https://pith.science/pith/5NUXLXMHFO22ZI6LJOW6HKIOSP","download_json":"https://pith.science/pith/5NUXLXMHFO22ZI6LJOW6HKIOSP.json","view_paper":"https://pith.science/paper/5NUXLXMH","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2605.16721&json=true","fetch_graph":"https://pith.science/api/pith-number/5NUXLXMHFO22ZI6LJOW6HKIOSP/graph.json","fetch_events":"https://pith.science/api/pith-number/5NUXLXMHFO22ZI6LJOW6HKIOSP/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/5NUXLXMHFO22ZI6LJOW6HKIOSP/action/timestamp_anchor","attest_storage":"https://pith.science/pith/5NUXLXMHFO22ZI6LJOW6HKIOSP/action/storage_attestation","attest_author":"https://pith.science/pith/5NUXLXMHFO22ZI6LJOW6HKIOSP/action/author_attestation","sign_citation":"https://pith.science/pith/5NUXLXMHFO22ZI6LJOW6HKIOSP/action/citation_signature","submit_replication":"https://pith.science/pith/5NUXLXMHFO22ZI6LJOW6HKIOSP/action/replication_record"}},"created_at":"2026-05-20T00:02:38.393600+00:00","updated_at":"2026-05-20T00:02:38.393600+00:00"}