{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2020:446GR67R3E6ODXOHWQ5YYNIEN5","short_pith_number":"pith:446GR67R","canonical_record":{"source":{"id":"2004.11383","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2020-04-23T18:00:01Z","cross_cats_sorted":["hep-ex","nucl-ex"],"title_canon_sha256":"0d88676cee7752c44673fe9e515fcee8c64263018ca218ef0d7bafe46d4d59f6","abstract_canon_sha256":"03dd44d8c944fb1dd78837ee020509fccef6086bbd52c2bdba158d012bab1001"},"schema_version":"1.0"},"canonical_sha256":"e73c68fbf1d93ce1ddc7b43b8c35046f4f1db46fbfc31c75c3db970262530f24","source":{"kind":"arxiv","id":"2004.11383","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2004.11383","created_at":"2026-07-05T01:35:45Z"},{"alias_kind":"arxiv_version","alias_value":"2004.11383v3","created_at":"2026-07-05T01:35:45Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2004.11383","created_at":"2026-07-05T01:35:45Z"},{"alias_kind":"pith_short_12","alias_value":"446GR67R3E6O","created_at":"2026-07-05T01:35:45Z"},{"alias_kind":"pith_short_16","alias_value":"446GR67R3E6ODXOH","created_at":"2026-07-05T01:35:45Z"},{"alias_kind":"pith_short_8","alias_value":"446GR67R","created_at":"2026-07-05T01:35:45Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2020:446GR67R3E6ODXOHWQ5YYNIEN5","target":"record","payload":{"canonical_record":{"source":{"id":"2004.11383","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2020-04-23T18:00:01Z","cross_cats_sorted":["hep-ex","nucl-ex"],"title_canon_sha256":"0d88676cee7752c44673fe9e515fcee8c64263018ca218ef0d7bafe46d4d59f6","abstract_canon_sha256":"03dd44d8c944fb1dd78837ee020509fccef6086bbd52c2bdba158d012bab1001"},"schema_version":"1.0"},"canonical_sha256":"e73c68fbf1d93ce1ddc7b43b8c35046f4f1db46fbfc31c75c3db970262530f24","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T01:35:45.707570Z","signature_b64":"ltXhmrKrJGJ9G1/4dywd/aWMLKuC/EiSYyu6ZWip3U6XSMr36Sc1eD4HTBJrpn/MNfVRToMyJz52KE2sNTBQBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e73c68fbf1d93ce1ddc7b43b8c35046f4f1db46fbfc31c75c3db970262530f24","last_reissued_at":"2026-07-05T01:35:45.706977Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T01:35:45.706977Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2004.11383","source_version":3,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T01:35:45Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"xzu/UGu8Z3Aswo/2hXjmHZFfBY3avC+PEIPWOdg7h6nNg+lzwugYrGR7Y6C7+kuiQvfFMRoVBVRkobUXNNgOBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-22T11:51:51.920949Z"},"content_sha256":"0a56475923e033e6e68156c142fc3f807fcafd93f1a3ab2be02467568b49deb2","schema_version":"1.0","event_id":"sha256:0a56475923e033e6e68156c142fc3f807fcafd93f1a3ab2be02467568b49deb2"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2020:446GR67R3E6ODXOHWQ5YYNIEN5","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Evidence for Nonlinear Isotope Shift in Yb$^+$ Search for New Boson","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["hep-ex","nucl-ex"],"primary_cat":"physics.atom-ph","authors_text":"Akio Kawasaki, Amy Geddes, Calvin Leung, Diana P. L. Aude Craik, Honggi Jeon, Ian Counts, Joonseok Hur, Julian Berengut, Vladan Vuleti\\'c, Wonho Jhe","submitted_at":"2020-04-23T18:00:01Z","abstract_excerpt":"We measure isotope shifts for five Yb$^+$ isotopes with zero nuclear spin on two narrow optical quadrupole transitions ${}^2S_{1/2} \\rightarrow {}^2D_{3/2}$, ${}^2S_{1/2} \\rightarrow {}^2D_{5/2}$ with an accuracy of $\\sim 300$ Hz. The corresponding King plot shows a $3 \\times 10^{-7}$ deviation from linearity at the 3 $\\sigma$ uncertainty level. Such a nonlinearity can indicate physics beyond the Standard Model (SM) in the form of a new bosonic force carrier, or arise from higher-order nuclear effects within the SM. We identify the quadratic field shift as a possible contributor to the nonline"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2004.11383","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/2004.11383/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":"2026-07-05T01:35:45Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"+Y+OMYKp44oGrSkwQLqtHh7pU7qok3f6POveI2Pt1UXoFM2pys9vnA5NSyqzPdUDCMvhPsiGZq/uu+Ms+BWuDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-22T11:51:51.921354Z"},"content_sha256":"e93ba747eb52f078a49730589310473aa1a6478472e698c4661a58fe0dfe9521","schema_version":"1.0","event_id":"sha256:e93ba747eb52f078a49730589310473aa1a6478472e698c4661a58fe0dfe9521"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/446GR67R3E6ODXOHWQ5YYNIEN5/bundle.json","state_url":"https://pith.science/pith/446GR67R3E6ODXOHWQ5YYNIEN5/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/446GR67R3E6ODXOHWQ5YYNIEN5/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":"2026-08-22T11:51:51Z","links":{"resolver":"https://pith.science/pith/446GR67R3E6ODXOHWQ5YYNIEN5","bundle":"https://pith.science/pith/446GR67R3E6ODXOHWQ5YYNIEN5/bundle.json","state":"https://pith.science/pith/446GR67R3E6ODXOHWQ5YYNIEN5/state.json","well_known_bundle":"https://pith.science/.well-known/pith/446GR67R3E6ODXOHWQ5YYNIEN5/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:446GR67R3E6ODXOHWQ5YYNIEN5","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":"03dd44d8c944fb1dd78837ee020509fccef6086bbd52c2bdba158d012bab1001","cross_cats_sorted":["hep-ex","nucl-ex"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2020-04-23T18:00:01Z","title_canon_sha256":"0d88676cee7752c44673fe9e515fcee8c64263018ca218ef0d7bafe46d4d59f6"},"schema_version":"1.0","source":{"id":"2004.11383","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2004.11383","created_at":"2026-07-05T01:35:45Z"},{"alias_kind":"arxiv_version","alias_value":"2004.11383v3","created_at":"2026-07-05T01:35:45Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2004.11383","created_at":"2026-07-05T01:35:45Z"},{"alias_kind":"pith_short_12","alias_value":"446GR67R3E6O","created_at":"2026-07-05T01:35:45Z"},{"alias_kind":"pith_short_16","alias_value":"446GR67R3E6ODXOH","created_at":"2026-07-05T01:35:45Z"},{"alias_kind":"pith_short_8","alias_value":"446GR67R","created_at":"2026-07-05T01:35:45Z"}],"graph_snapshots":[{"event_id":"sha256:e93ba747eb52f078a49730589310473aa1a6478472e698c4661a58fe0dfe9521","target":"graph","created_at":"2026-07-05T01:35:45Z","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/2004.11383/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We measure isotope shifts for five Yb$^+$ isotopes with zero nuclear spin on two narrow optical quadrupole transitions ${}^2S_{1/2} \\rightarrow {}^2D_{3/2}$, ${}^2S_{1/2} \\rightarrow {}^2D_{5/2}$ with an accuracy of $\\sim 300$ Hz. The corresponding King plot shows a $3 \\times 10^{-7}$ deviation from linearity at the 3 $\\sigma$ uncertainty level. Such a nonlinearity can indicate physics beyond the Standard Model (SM) in the form of a new bosonic force carrier, or arise from higher-order nuclear effects within the SM. We identify the quadratic field shift as a possible contributor to the nonline","authors_text":"Akio Kawasaki, Amy Geddes, Calvin Leung, Diana P. L. Aude Craik, Honggi Jeon, Ian Counts, Joonseok Hur, Julian Berengut, Vladan Vuleti\\'c, Wonho Jhe","cross_cats":["hep-ex","nucl-ex"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2020-04-23T18:00:01Z","title":"Evidence for Nonlinear Isotope Shift in Yb$^+$ Search for New Boson"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2004.11383","kind":"arxiv","version":3},"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":"sha256:0a56475923e033e6e68156c142fc3f807fcafd93f1a3ab2be02467568b49deb2","target":"record","created_at":"2026-07-05T01:35:45Z","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":"03dd44d8c944fb1dd78837ee020509fccef6086bbd52c2bdba158d012bab1001","cross_cats_sorted":["hep-ex","nucl-ex"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2020-04-23T18:00:01Z","title_canon_sha256":"0d88676cee7752c44673fe9e515fcee8c64263018ca218ef0d7bafe46d4d59f6"},"schema_version":"1.0","source":{"id":"2004.11383","kind":"arxiv","version":3}},"canonical_sha256":"e73c68fbf1d93ce1ddc7b43b8c35046f4f1db46fbfc31c75c3db970262530f24","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e73c68fbf1d93ce1ddc7b43b8c35046f4f1db46fbfc31c75c3db970262530f24","first_computed_at":"2026-07-05T01:35:45.706977Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T01:35:45.706977Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"ltXhmrKrJGJ9G1/4dywd/aWMLKuC/EiSYyu6ZWip3U6XSMr36Sc1eD4HTBJrpn/MNfVRToMyJz52KE2sNTBQBA==","signature_status":"signed_v1","signed_at":"2026-07-05T01:35:45.707570Z","signed_message":"canonical_sha256_bytes"},"source_id":"2004.11383","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:0a56475923e033e6e68156c142fc3f807fcafd93f1a3ab2be02467568b49deb2","sha256:e93ba747eb52f078a49730589310473aa1a6478472e698c4661a58fe0dfe9521"],"state_sha256":"e24ea65ce95e9427734c97d74c3e841fa9514d5b0140baf71bfe4ed96fc56b1c"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"6iHGKVIURw6AyA0o8pXIwVciP3ks3+eaNIGvLtb0lPfj3bz/UWeaxq/pwiOk5XmZReExqwbCdRHnPgZE4lt+Cw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-22T11:51:51.924031Z","bundle_sha256":"41da4b354dea3c3e0fd96ab3fda58f78da2a67f22aba8d9afc1840160adffbd3"}}