{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2004:342CORJSUFOMYPAUKN6SOQCNNT","short_pith_number":"pith:342CORJS","schema_version":"1.0","canonical_sha256":"df34274532a15ccc3c14537d27404d6cf0fc3fe202298c2585a8db3f491b2201","source":{"kind":"arxiv","id":"hep-ex/0401029","version":3},"attestation_state":"computed","paper":{"title":"Observation of Large CP Violation and Evidence for Direct CP Violation in B0-->pi+pi- Decays","license":"","headline":"","cross_cats":[],"primary_cat":"hep-ex","authors_text":"et al. (for the Belle Collaboration), K. Abe","submitted_at":"2004-01-18T17:44:28Z","abstract_excerpt":"We report the first observation of CP-violating asymmetries in B0 --> pi+pi- decays based on a 140 fb-1 data sample collected at the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. We reconstruct one neutral B meson as a B0 --> pi+pi- CP eigenstate and identify the flavor of the accompanying B meson from its decay products. We apply an unbinned maximum likelihood fit to the distribution of the time intervals between the two B meson decay points. The fit yields the CP-violating asymmetry amplitudes Apipi = +0.58+/-0.15(stat)+/-0.07(syst) and Spipi = -1"},"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":"hep-ex/0401029","kind":"arxiv","version":3},"metadata":{"license":"","primary_cat":"hep-ex","submitted_at":"2004-01-18T17:44:28Z","cross_cats_sorted":[],"title_canon_sha256":"e2b8433e4ac8bd00f0d6dd64a26ad735072d032f4f1c5c897326116bf7cc7502","abstract_canon_sha256":"eeaebbacecb274a4ddc277faccb1ea9c0cd763d9ec49e5eeea12d93eee24aac5"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T23:54:19.060048Z","signature_b64":"jHBZEnuYKip0ieuaeFtQQ4XQISFHW+dAXf8kdFWSXltBItGcVhRX6lVnNn+vNdUfkRkIIvs+IdXG+aWt08L6Dw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"df34274532a15ccc3c14537d27404d6cf0fc3fe202298c2585a8db3f491b2201","last_reissued_at":"2026-07-04T23:54:19.059643Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T23:54:19.059643Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Observation of Large CP Violation and Evidence for Direct CP Violation in B0-->pi+pi- Decays","license":"","headline":"","cross_cats":[],"primary_cat":"hep-ex","authors_text":"et al. (for the Belle Collaboration), K. Abe","submitted_at":"2004-01-18T17:44:28Z","abstract_excerpt":"We report the first observation of CP-violating asymmetries in B0 --> pi+pi- decays based on a 140 fb-1 data sample collected at the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. We reconstruct one neutral B meson as a B0 --> pi+pi- CP eigenstate and identify the flavor of the accompanying B meson from its decay products. We apply an unbinned maximum likelihood fit to the distribution of the time intervals between the two B meson decay points. The fit yields the CP-violating asymmetry amplitudes Apipi = +0.58+/-0.15(stat)+/-0.07(syst) and Spipi = -1"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"hep-ex/0401029","kind":"arxiv","version":3},"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/hep-ex/0401029/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":"hep-ex/0401029","created_at":"2026-07-04T23:54:19.059700+00:00"},{"alias_kind":"arxiv_version","alias_value":"hep-ex/0401029v3","created_at":"2026-07-04T23:54:19.059700+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.hep-ex/0401029","created_at":"2026-07-04T23:54:19.059700+00:00"},{"alias_kind":"pith_short_12","alias_value":"342CORJSUFOM","created_at":"2026-07-04T23:54:19.059700+00:00"},{"alias_kind":"pith_short_16","alias_value":"342CORJSUFOMYPAU","created_at":"2026-07-04T23:54:19.059700+00:00"},{"alias_kind":"pith_short_8","alias_value":"342CORJS","created_at":"2026-07-04T23:54:19.059700+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/342CORJSUFOMYPAUKN6SOQCNNT","json":"https://pith.science/pith/342CORJSUFOMYPAUKN6SOQCNNT.json","graph_json":"https://pith.science/api/pith-number/342CORJSUFOMYPAUKN6SOQCNNT/graph.json","events_json":"https://pith.science/api/pith-number/342CORJSUFOMYPAUKN6SOQCNNT/events.json","paper":"https://pith.science/paper/342CORJS"},"agent_actions":{"view_html":"https://pith.science/pith/342CORJSUFOMYPAUKN6SOQCNNT","download_json":"https://pith.science/pith/342CORJSUFOMYPAUKN6SOQCNNT.json","view_paper":"https://pith.science/paper/342CORJS","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=hep-ex/0401029&json=true","fetch_graph":"https://pith.science/api/pith-number/342CORJSUFOMYPAUKN6SOQCNNT/graph.json","fetch_events":"https://pith.science/api/pith-number/342CORJSUFOMYPAUKN6SOQCNNT/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/342CORJSUFOMYPAUKN6SOQCNNT/action/timestamp_anchor","attest_storage":"https://pith.science/pith/342CORJSUFOMYPAUKN6SOQCNNT/action/storage_attestation","attest_author":"https://pith.science/pith/342CORJSUFOMYPAUKN6SOQCNNT/action/author_attestation","sign_citation":"https://pith.science/pith/342CORJSUFOMYPAUKN6SOQCNNT/action/citation_signature","submit_replication":"https://pith.science/pith/342CORJSUFOMYPAUKN6SOQCNNT/action/replication_record"}},"created_at":"2026-07-04T23:54:19.059700+00:00","updated_at":"2026-07-04T23:54:19.059700+00:00"}