{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2015:VYQ2CUCMJZICLQ7FEAU3D4VXCI","short_pith_number":"pith:VYQ2CUCM","schema_version":"1.0","canonical_sha256":"ae21a1504c4e5025c3e52029b1f2b71233cd4eaff60199e9bb813c90276c3a9b","source":{"kind":"arxiv","id":"1508.00074","version":2},"attestation_state":"computed","paper":{"title":"CP Violation in $D^0\\rightarrow K_SK_S$","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"hep-ph","authors_text":"Stefan Schacht, Ulrich Nierste","submitted_at":"2015-08-01T04:47:16Z","abstract_excerpt":"The direct CP asymmetry $a_{CP}^{\\mathrm{dir}}(D^0\\rightarrow K_SK_S)$ involves exchange diagrams which are induced at tree level in the Standard Model. Since the corresponding topological amplitude $E_{KK}$ can be large, $D^0\\rightarrow K_SK_S$ is a promising discovery channel for charm CP violation. We estimate the penguin annihilation amplitude with a perturbative calculation and extract the exchange amplitude $E_{KK}$ from a global fit to $D$ branching ratios. Our results are further used to predict the size of mixing-induced CP violation. We obtain $\\vert a_{CP}^{\\mathrm{dir}}(D^0\\rightar"},"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":"1508.00074","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2015-08-01T04:47:16Z","cross_cats_sorted":[],"title_canon_sha256":"ecf89aa86c638fb2b7c0fe1928d29f50ab0322c2f0c153acf5cd0e10c3acf666","abstract_canon_sha256":"3e95560b419a4b47831a738ae00e6047eb170b011d1617a5f6d5b53545210e13"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:30:57.984184Z","signature_b64":"jbE9LJNJCy+NgXPpE+JPXQxxBYQqwcWADIjf5q57RIavpkFuVKsptdGv35DLFRfdPn7pKiBK1mzlYyyR+p5EDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"ae21a1504c4e5025c3e52029b1f2b71233cd4eaff60199e9bb813c90276c3a9b","last_reissued_at":"2026-05-18T01:30:57.983804Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:30:57.983804Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"CP Violation in $D^0\\rightarrow K_SK_S$","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"hep-ph","authors_text":"Stefan Schacht, Ulrich Nierste","submitted_at":"2015-08-01T04:47:16Z","abstract_excerpt":"The direct CP asymmetry $a_{CP}^{\\mathrm{dir}}(D^0\\rightarrow K_SK_S)$ involves exchange diagrams which are induced at tree level in the Standard Model. Since the corresponding topological amplitude $E_{KK}$ can be large, $D^0\\rightarrow K_SK_S$ is a promising discovery channel for charm CP violation. We estimate the penguin annihilation amplitude with a perturbative calculation and extract the exchange amplitude $E_{KK}$ from a global fit to $D$ branching ratios. Our results are further used to predict the size of mixing-induced CP violation. We obtain $\\vert a_{CP}^{\\mathrm{dir}}(D^0\\rightar"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1508.00074","kind":"arxiv","version":2},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"aliases":[{"alias_kind":"arxiv","alias_value":"1508.00074","created_at":"2026-05-18T01:30:57.983863+00:00"},{"alias_kind":"arxiv_version","alias_value":"1508.00074v2","created_at":"2026-05-18T01:30:57.983863+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1508.00074","created_at":"2026-05-18T01:30:57.983863+00:00"},{"alias_kind":"pith_short_12","alias_value":"VYQ2CUCMJZIC","created_at":"2026-05-18T12:29:47.479230+00:00"},{"alias_kind":"pith_short_16","alias_value":"VYQ2CUCMJZICLQ7F","created_at":"2026-05-18T12:29:47.479230+00:00"},{"alias_kind":"pith_short_8","alias_value":"VYQ2CUCM","created_at":"2026-05-18T12:29:47.479230+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":1,"internal_anchor_count":0,"sample":[{"citing_arxiv_id":"2605.00989","citing_title":"$CP$ violation in neutral kaon mixing in $D^0\\rightarrow K_SK_S$","ref_index":8,"is_internal_anchor":false}]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/VYQ2CUCMJZICLQ7FEAU3D4VXCI","json":"https://pith.science/pith/VYQ2CUCMJZICLQ7FEAU3D4VXCI.json","graph_json":"https://pith.science/api/pith-number/VYQ2CUCMJZICLQ7FEAU3D4VXCI/graph.json","events_json":"https://pith.science/api/pith-number/VYQ2CUCMJZICLQ7FEAU3D4VXCI/events.json","paper":"https://pith.science/paper/VYQ2CUCM"},"agent_actions":{"view_html":"https://pith.science/pith/VYQ2CUCMJZICLQ7FEAU3D4VXCI","download_json":"https://pith.science/pith/VYQ2CUCMJZICLQ7FEAU3D4VXCI.json","view_paper":"https://pith.science/paper/VYQ2CUCM","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1508.00074&json=true","fetch_graph":"https://pith.science/api/pith-number/VYQ2CUCMJZICLQ7FEAU3D4VXCI/graph.json","fetch_events":"https://pith.science/api/pith-number/VYQ2CUCMJZICLQ7FEAU3D4VXCI/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/VYQ2CUCMJZICLQ7FEAU3D4VXCI/action/timestamp_anchor","attest_storage":"https://pith.science/pith/VYQ2CUCMJZICLQ7FEAU3D4VXCI/action/storage_attestation","attest_author":"https://pith.science/pith/VYQ2CUCMJZICLQ7FEAU3D4VXCI/action/author_attestation","sign_citation":"https://pith.science/pith/VYQ2CUCMJZICLQ7FEAU3D4VXCI/action/citation_signature","submit_replication":"https://pith.science/pith/VYQ2CUCMJZICLQ7FEAU3D4VXCI/action/replication_record"}},"created_at":"2026-05-18T01:30:57.983863+00:00","updated_at":"2026-05-18T01:30:57.983863+00:00"}