{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:AJG6XUNJQXCB7BGWUXDKXFR3ER","short_pith_number":"pith:AJG6XUNJ","canonical_record":{"source":{"id":"2107.14708","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"hep-ph","submitted_at":"2021-07-30T15:30:57Z","cross_cats_sorted":["hep-ex","hep-lat","nucl-ex","nucl-th"],"title_canon_sha256":"acb357f12522b8386608960648bccddeb3e683605ca062dc34e96034abaf2e3d","abstract_canon_sha256":"fdce2b5bb630cb25818f868f34e52e173a4dca68f3a8fe7c4b5ce8893ff43075"},"schema_version":"1.0"},"canonical_sha256":"024debd1a985c41f84d6a5c6ab963b2465f70c26a3af8da048a0d9174436d6bc","source":{"kind":"arxiv","id":"2107.14708","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2107.14708","created_at":"2026-07-05T03:46:45Z"},{"alias_kind":"arxiv_version","alias_value":"2107.14708v2","created_at":"2026-07-05T03:46:45Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2107.14708","created_at":"2026-07-05T03:46:45Z"},{"alias_kind":"pith_short_12","alias_value":"AJG6XUNJQXCB","created_at":"2026-07-05T03:46:45Z"},{"alias_kind":"pith_short_16","alias_value":"AJG6XUNJQXCB7BGW","created_at":"2026-07-05T03:46:45Z"},{"alias_kind":"pith_short_8","alias_value":"AJG6XUNJ","created_at":"2026-07-05T03:46:45Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:AJG6XUNJQXCB7BGWUXDKXFR3ER","target":"record","payload":{"canonical_record":{"source":{"id":"2107.14708","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"hep-ph","submitted_at":"2021-07-30T15:30:57Z","cross_cats_sorted":["hep-ex","hep-lat","nucl-ex","nucl-th"],"title_canon_sha256":"acb357f12522b8386608960648bccddeb3e683605ca062dc34e96034abaf2e3d","abstract_canon_sha256":"fdce2b5bb630cb25818f868f34e52e173a4dca68f3a8fe7c4b5ce8893ff43075"},"schema_version":"1.0"},"canonical_sha256":"024debd1a985c41f84d6a5c6ab963b2465f70c26a3af8da048a0d9174436d6bc","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T03:46:45.303991Z","signature_b64":"yxAZfpD/WvDn6UNjQzlEHLRgvo98QQ/lFT9QroBzQuzLLry8fs7IfRcRkaKI4fJGxTr5hn/TUmTKcL1EYVeuDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"024debd1a985c41f84d6a5c6ab963b2465f70c26a3af8da048a0d9174436d6bc","last_reissued_at":"2026-07-05T03:46:45.303541Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T03:46:45.303541Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2107.14708","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T03:46:45Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"fO5/oFXgoN6X+SNRDUq3mKqn2w8/NCNjhq6WR+DlyRXJVhPPoTNfp4GcXBiTpx0glQ+1Y1Ur51cZbK2Y6VUnAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-11T03:43:04.038822Z"},"content_sha256":"26dd7bec1edbcf55bd09378ea193cc69e1bb07f68db5f564fabdcfa62496c440","schema_version":"1.0","event_id":"sha256:26dd7bec1edbcf55bd09378ea193cc69e1bb07f68db5f564fabdcfa62496c440"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:AJG6XUNJQXCB7BGWUXDKXFR3ER","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Update on $|V_{us}|$ and $|V_{us}/V_{ud}|$ from semileptonic kaon and pion decays","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["hep-ex","hep-lat","nucl-ex","nucl-th"],"primary_cat":"hep-ph","authors_text":"Chien-Yeah Seng, Daniel Galviz, Ulf-G. Mei{\\ss}ner, William J. Marciano","submitted_at":"2021-07-30T15:30:57Z","abstract_excerpt":"We discuss the recent progress in the study of semileptonic kaon and pion decays, including new experimental results, improved electroweak radiative corrections, form factor calculations and isospin-breaking effects. As a result, we obtain $|V_{us}|=0.22309(40)(39)(3)$ from kaon semileptonic decays and $|V_{us}/V_{ud}|=0.22908(66)(41)(40)(2)(1)$ from the ratio between the kaon and pion semileptonic decay rates. We report an apparent violation of the top-row Cabibbo-Kobayashi-Maskawa matrix unitarity at a $3.2\\sim 5.6\\sigma$ level, and a discrepancy at a $2.2\\sigma$ level between the value of $"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2107.14708","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2107.14708/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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T03:46:45Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"q2aLw+zSvL8zTviOVPK2dX3qoWwi8FflVy7IxSfRtxhdAxv//agvBNlu8GxrhPhcS9pbKTg5rU2+WTLhcMZJDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-11T03:43:04.039567Z"},"content_sha256":"1791b977487435972e37dad9fbc029772bdb6fd81a4d569b58724f52f2ee8ded","schema_version":"1.0","event_id":"sha256:1791b977487435972e37dad9fbc029772bdb6fd81a4d569b58724f52f2ee8ded"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/AJG6XUNJQXCB7BGWUXDKXFR3ER/bundle.json","state_url":"https://pith.science/pith/AJG6XUNJQXCB7BGWUXDKXFR3ER/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/AJG6XUNJQXCB7BGWUXDKXFR3ER/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-08-11T03:43:04Z","links":{"resolver":"https://pith.science/pith/AJG6XUNJQXCB7BGWUXDKXFR3ER","bundle":"https://pith.science/pith/AJG6XUNJQXCB7BGWUXDKXFR3ER/bundle.json","state":"https://pith.science/pith/AJG6XUNJQXCB7BGWUXDKXFR3ER/state.json","well_known_bundle":"https://pith.science/.well-known/pith/AJG6XUNJQXCB7BGWUXDKXFR3ER/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:AJG6XUNJQXCB7BGWUXDKXFR3ER","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"fdce2b5bb630cb25818f868f34e52e173a4dca68f3a8fe7c4b5ce8893ff43075","cross_cats_sorted":["hep-ex","hep-lat","nucl-ex","nucl-th"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"hep-ph","submitted_at":"2021-07-30T15:30:57Z","title_canon_sha256":"acb357f12522b8386608960648bccddeb3e683605ca062dc34e96034abaf2e3d"},"schema_version":"1.0","source":{"id":"2107.14708","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2107.14708","created_at":"2026-07-05T03:46:45Z"},{"alias_kind":"arxiv_version","alias_value":"2107.14708v2","created_at":"2026-07-05T03:46:45Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2107.14708","created_at":"2026-07-05T03:46:45Z"},{"alias_kind":"pith_short_12","alias_value":"AJG6XUNJQXCB","created_at":"2026-07-05T03:46:45Z"},{"alias_kind":"pith_short_16","alias_value":"AJG6XUNJQXCB7BGW","created_at":"2026-07-05T03:46:45Z"},{"alias_kind":"pith_short_8","alias_value":"AJG6XUNJ","created_at":"2026-07-05T03:46:45Z"}],"graph_snapshots":[{"event_id":"sha256:1791b977487435972e37dad9fbc029772bdb6fd81a4d569b58724f52f2ee8ded","target":"graph","created_at":"2026-07-05T03:46:45Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2107.14708/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We discuss the recent progress in the study of semileptonic kaon and pion decays, including new experimental results, improved electroweak radiative corrections, form factor calculations and isospin-breaking effects. As a result, we obtain $|V_{us}|=0.22309(40)(39)(3)$ from kaon semileptonic decays and $|V_{us}/V_{ud}|=0.22908(66)(41)(40)(2)(1)$ from the ratio between the kaon and pion semileptonic decay rates. We report an apparent violation of the top-row Cabibbo-Kobayashi-Maskawa matrix unitarity at a $3.2\\sim 5.6\\sigma$ level, and a discrepancy at a $2.2\\sigma$ level between the value of $","authors_text":"Chien-Yeah Seng, Daniel Galviz, Ulf-G. Mei{\\ss}ner, William J. Marciano","cross_cats":["hep-ex","hep-lat","nucl-ex","nucl-th"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"hep-ph","submitted_at":"2021-07-30T15:30:57Z","title":"Update on $|V_{us}|$ and $|V_{us}/V_{ud}|$ from semileptonic kaon and pion decays"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2107.14708","kind":"arxiv","version":2},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:26dd7bec1edbcf55bd09378ea193cc69e1bb07f68db5f564fabdcfa62496c440","target":"record","created_at":"2026-07-05T03:46:45Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"fdce2b5bb630cb25818f868f34e52e173a4dca68f3a8fe7c4b5ce8893ff43075","cross_cats_sorted":["hep-ex","hep-lat","nucl-ex","nucl-th"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"hep-ph","submitted_at":"2021-07-30T15:30:57Z","title_canon_sha256":"acb357f12522b8386608960648bccddeb3e683605ca062dc34e96034abaf2e3d"},"schema_version":"1.0","source":{"id":"2107.14708","kind":"arxiv","version":2}},"canonical_sha256":"024debd1a985c41f84d6a5c6ab963b2465f70c26a3af8da048a0d9174436d6bc","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"024debd1a985c41f84d6a5c6ab963b2465f70c26a3af8da048a0d9174436d6bc","first_computed_at":"2026-07-05T03:46:45.303541Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T03:46:45.303541Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"yxAZfpD/WvDn6UNjQzlEHLRgvo98QQ/lFT9QroBzQuzLLry8fs7IfRcRkaKI4fJGxTr5hn/TUmTKcL1EYVeuDg==","signature_status":"signed_v1","signed_at":"2026-07-05T03:46:45.303991Z","signed_message":"canonical_sha256_bytes"},"source_id":"2107.14708","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:26dd7bec1edbcf55bd09378ea193cc69e1bb07f68db5f564fabdcfa62496c440","sha256:1791b977487435972e37dad9fbc029772bdb6fd81a4d569b58724f52f2ee8ded"],"state_sha256":"7a06b5c5f19abd99b437c3d8f859c591a82e8d4f17b67e4d53253110714b606f"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"veWCw06e6mlpWbaPU7cOCCacueUo8UmLxWgnW51VcEVUaaKmB2yrCQlov6oDXGWzER/LD1ShtXztPi96HxODAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-11T03:43:04.044639Z","bundle_sha256":"d287ee8930aedac67bca919eb4da8bd471e0040362266a3437928962f4c24bb1"}}