{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:3FPZQP55A3ROWDH6CBQ5OUSN3Y","short_pith_number":"pith:3FPZQP55","canonical_record":{"source":{"id":"1601.05998","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-lat","submitted_at":"2016-01-22T13:42:45Z","cross_cats_sorted":["hep-ph"],"title_canon_sha256":"57bc77bf942c0b24ad495b46c1752f61f155efded4f2544a3465f08715cb66d3","abstract_canon_sha256":"abba0f7d5723a6b4485d099748166c5401207d603b7ea41142312045fa8efce9"},"schema_version":"1.0"},"canonical_sha256":"d95f983fbd06e2eb0cfe1061d7524dde347186b26718145071f40bee1ea876af","source":{"kind":"arxiv","id":"1601.05998","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1601.05998","created_at":"2026-05-18T00:47:15Z"},{"alias_kind":"arxiv_version","alias_value":"1601.05998v2","created_at":"2026-05-18T00:47:15Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1601.05998","created_at":"2026-05-18T00:47:15Z"},{"alias_kind":"pith_short_12","alias_value":"3FPZQP55A3RO","created_at":"2026-05-18T12:29:55Z"},{"alias_kind":"pith_short_16","alias_value":"3FPZQP55A3ROWDH6","created_at":"2026-05-18T12:29:55Z"},{"alias_kind":"pith_short_8","alias_value":"3FPZQP55","created_at":"2026-05-18T12:29:55Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:3FPZQP55A3ROWDH6CBQ5OUSN3Y","target":"record","payload":{"canonical_record":{"source":{"id":"1601.05998","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-lat","submitted_at":"2016-01-22T13:42:45Z","cross_cats_sorted":["hep-ph"],"title_canon_sha256":"57bc77bf942c0b24ad495b46c1752f61f155efded4f2544a3465f08715cb66d3","abstract_canon_sha256":"abba0f7d5723a6b4485d099748166c5401207d603b7ea41142312045fa8efce9"},"schema_version":"1.0"},"canonical_sha256":"d95f983fbd06e2eb0cfe1061d7524dde347186b26718145071f40bee1ea876af","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:47:15.642970Z","signature_b64":"FgGUw0yFz2QP86LBjNzxxO8Ey0fz9sjq0k6uRgKqfok4v5T/9moJ8elbH5rvPbJ9Fhqsx8NFMb+LAsyuNvxABw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d95f983fbd06e2eb0cfe1061d7524dde347186b26718145071f40bee1ea876af","last_reissued_at":"2026-05-18T00:47:15.642389Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:47:15.642389Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1601.05998","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":"2026-05-18T00:47:15Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"HqdO0UX4yQDSILnc/ExFeB8/iCKGhicpQISN9tOGuGhC6o3QWUHcHviwR0B8hTiMtuTrF5kvgesyvpGt7g7IAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T10:28:24.278577Z"},"content_sha256":"4a8ef4836e8d8282cef113074dbdbe67d58684c7d4786752f0f19dbea4143c81","schema_version":"1.0","event_id":"sha256:4a8ef4836e8d8282cef113074dbdbe67d58684c7d4786752f0f19dbea4143c81"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:3FPZQP55A3ROWDH6CBQ5OUSN3Y","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Leptonic decay-constant ratio $f_K/f_\\pi$ from lattice QCD using 2+1 clover-improved fermion flavors with 2-HEX smearing","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["hep-ph"],"primary_cat":"hep-lat","authors_text":"Andreas Sch\\\"afer, Christian Hoelbling, Enno E. Scholz, K\\'alm\\'an K. Szab\\'o, Laurent Lellouch, Lukas Varnhorst, Stefan Krieg, Stephan D\\\"urr, Thomas Lippert, Thomas Rae, Zolt\\'an Fodor","submitted_at":"2016-01-22T13:42:45Z","abstract_excerpt":"We present a calculation of the leptonic decay-constant ratio $f_K/f_\\pi$ in 2+1 flavor QCD. Our data set includes five lattice spacings and pion masses reaching down below the physical one. Special emphasis is placed on a careful study of all systematic uncertainties, especially the continuum extrapolation. Our result is perfectly compatible with the first-row unitarity constraint of the Standard Model."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1601.05998","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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:47:15Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"49zZs/O4kIs/DaZdz2JsPaoIucMPPNEvCUT1mmieMDLpo4SjtESbN76akro/Z2bPkexexPhAUsmUcgep8yMLAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T10:28:24.279238Z"},"content_sha256":"413ab2659aa2811e342a31168fec75f8aabb2fe31035dbb37228489a67d8061a","schema_version":"1.0","event_id":"sha256:413ab2659aa2811e342a31168fec75f8aabb2fe31035dbb37228489a67d8061a"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/3FPZQP55A3ROWDH6CBQ5OUSN3Y/bundle.json","state_url":"https://pith.science/pith/3FPZQP55A3ROWDH6CBQ5OUSN3Y/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/3FPZQP55A3ROWDH6CBQ5OUSN3Y/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":"2026-05-27T10:28:24Z","links":{"resolver":"https://pith.science/pith/3FPZQP55A3ROWDH6CBQ5OUSN3Y","bundle":"https://pith.science/pith/3FPZQP55A3ROWDH6CBQ5OUSN3Y/bundle.json","state":"https://pith.science/pith/3FPZQP55A3ROWDH6CBQ5OUSN3Y/state.json","well_known_bundle":"https://pith.science/.well-known/pith/3FPZQP55A3ROWDH6CBQ5OUSN3Y/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:3FPZQP55A3ROWDH6CBQ5OUSN3Y","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":"abba0f7d5723a6b4485d099748166c5401207d603b7ea41142312045fa8efce9","cross_cats_sorted":["hep-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-lat","submitted_at":"2016-01-22T13:42:45Z","title_canon_sha256":"57bc77bf942c0b24ad495b46c1752f61f155efded4f2544a3465f08715cb66d3"},"schema_version":"1.0","source":{"id":"1601.05998","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1601.05998","created_at":"2026-05-18T00:47:15Z"},{"alias_kind":"arxiv_version","alias_value":"1601.05998v2","created_at":"2026-05-18T00:47:15Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1601.05998","created_at":"2026-05-18T00:47:15Z"},{"alias_kind":"pith_short_12","alias_value":"3FPZQP55A3RO","created_at":"2026-05-18T12:29:55Z"},{"alias_kind":"pith_short_16","alias_value":"3FPZQP55A3ROWDH6","created_at":"2026-05-18T12:29:55Z"},{"alias_kind":"pith_short_8","alias_value":"3FPZQP55","created_at":"2026-05-18T12:29:55Z"}],"graph_snapshots":[{"event_id":"sha256:413ab2659aa2811e342a31168fec75f8aabb2fe31035dbb37228489a67d8061a","target":"graph","created_at":"2026-05-18T00:47:15Z","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"},"paper":{"abstract_excerpt":"We present a calculation of the leptonic decay-constant ratio $f_K/f_\\pi$ in 2+1 flavor QCD. Our data set includes five lattice spacings and pion masses reaching down below the physical one. Special emphasis is placed on a careful study of all systematic uncertainties, especially the continuum extrapolation. Our result is perfectly compatible with the first-row unitarity constraint of the Standard Model.","authors_text":"Andreas Sch\\\"afer, Christian Hoelbling, Enno E. Scholz, K\\'alm\\'an K. Szab\\'o, Laurent Lellouch, Lukas Varnhorst, Stefan Krieg, Stephan D\\\"urr, Thomas Lippert, Thomas Rae, Zolt\\'an Fodor","cross_cats":["hep-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-lat","submitted_at":"2016-01-22T13:42:45Z","title":"Leptonic decay-constant ratio $f_K/f_\\pi$ from lattice QCD using 2+1 clover-improved fermion flavors with 2-HEX smearing"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1601.05998","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":"sha256:4a8ef4836e8d8282cef113074dbdbe67d58684c7d4786752f0f19dbea4143c81","target":"record","created_at":"2026-05-18T00:47:15Z","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":"abba0f7d5723a6b4485d099748166c5401207d603b7ea41142312045fa8efce9","cross_cats_sorted":["hep-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-lat","submitted_at":"2016-01-22T13:42:45Z","title_canon_sha256":"57bc77bf942c0b24ad495b46c1752f61f155efded4f2544a3465f08715cb66d3"},"schema_version":"1.0","source":{"id":"1601.05998","kind":"arxiv","version":2}},"canonical_sha256":"d95f983fbd06e2eb0cfe1061d7524dde347186b26718145071f40bee1ea876af","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d95f983fbd06e2eb0cfe1061d7524dde347186b26718145071f40bee1ea876af","first_computed_at":"2026-05-18T00:47:15.642389Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:47:15.642389Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"FgGUw0yFz2QP86LBjNzxxO8Ey0fz9sjq0k6uRgKqfok4v5T/9moJ8elbH5rvPbJ9Fhqsx8NFMb+LAsyuNvxABw==","signature_status":"signed_v1","signed_at":"2026-05-18T00:47:15.642970Z","signed_message":"canonical_sha256_bytes"},"source_id":"1601.05998","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:4a8ef4836e8d8282cef113074dbdbe67d58684c7d4786752f0f19dbea4143c81","sha256:413ab2659aa2811e342a31168fec75f8aabb2fe31035dbb37228489a67d8061a"],"state_sha256":"406bfc76645cf010404235af408fe393b18a87a8dcb4f73b2dc302f1ddb184c2"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"qlSKYh3mEpoa+j7FuJALGFLFeE7gtxUIq88eLWEbc+SULuyP2LXYZVRY1vv6vtJYAuiiYR5Oj4jrCoi0beFsBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T10:28:24.282443Z","bundle_sha256":"87bb92f8c06c7ddf4ad0df4bc78c76768eb80caf5021b721b5807bfe87e6d0d5"}}