{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2010:VDCTMJQF5RDYFF6NO6XTDE3EHF","short_pith_number":"pith:VDCTMJQF","canonical_record":{"source":{"id":"1011.4922","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2010-11-22T20:05:37Z","cross_cats_sorted":["physics.atom-ph"],"title_canon_sha256":"c73f39c5d885c215441191cff1878ba8a0a54c4bc2c86a6452686bc85117d82d","abstract_canon_sha256":"f440c8f5e72e8fce8903111cdd630de7eddae46ddeea1c0eee9a12c0207a8517"},"schema_version":"1.0"},"canonical_sha256":"a8c5362605ec478297cd77af31936439709c0da55e828fedbf9e4ab5a08e20c9","source":{"kind":"arxiv","id":"1011.4922","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1011.4922","created_at":"2026-05-18T04:18:44Z"},{"alias_kind":"arxiv_version","alias_value":"1011.4922v1","created_at":"2026-05-18T04:18:44Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1011.4922","created_at":"2026-05-18T04:18:44Z"},{"alias_kind":"pith_short_12","alias_value":"VDCTMJQF5RDY","created_at":"2026-05-18T12:26:15Z"},{"alias_kind":"pith_short_16","alias_value":"VDCTMJQF5RDYFF6N","created_at":"2026-05-18T12:26:15Z"},{"alias_kind":"pith_short_8","alias_value":"VDCTMJQF","created_at":"2026-05-18T12:26:15Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2010:VDCTMJQF5RDYFF6NO6XTDE3EHF","target":"record","payload":{"canonical_record":{"source":{"id":"1011.4922","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2010-11-22T20:05:37Z","cross_cats_sorted":["physics.atom-ph"],"title_canon_sha256":"c73f39c5d885c215441191cff1878ba8a0a54c4bc2c86a6452686bc85117d82d","abstract_canon_sha256":"f440c8f5e72e8fce8903111cdd630de7eddae46ddeea1c0eee9a12c0207a8517"},"schema_version":"1.0"},"canonical_sha256":"a8c5362605ec478297cd77af31936439709c0da55e828fedbf9e4ab5a08e20c9","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:18:44.795720Z","signature_b64":"4NyEZ42PA+LlrtUCGEPr6+nW/yT42XvbysjUWWh0a28IXglGj9aZQ4rJ83ypg2EvMvJQ/EzJ3DdMekNjEbARCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a8c5362605ec478297cd77af31936439709c0da55e828fedbf9e4ab5a08e20c9","last_reissued_at":"2026-05-18T04:18:44.795079Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:18:44.795079Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1011.4922","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T04:18:44Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"o/cB5gRCHoDNlK64QeczLvwSWM/nJNX/FUTqBC8nhbyksQotWcqb/Stml5mMHmUSjSw4cs2/V8TJa38V31HFBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T22:28:44.135087Z"},"content_sha256":"1e4e0551327e57d9bbcaa38b7e1b04c3e10dabd1b5130230fed7c9f636d6c912","schema_version":"1.0","event_id":"sha256:1e4e0551327e57d9bbcaa38b7e1b04c3e10dabd1b5130230fed7c9f636d6c912"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2010:VDCTMJQF5RDYFF6NO6XTDE3EHF","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Muonic hydrogen and MeV forces","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.atom-ph"],"primary_cat":"hep-ph","authors_text":"David Tucker-Smith, Itay Yavin","submitted_at":"2010-11-22T20:05:37Z","abstract_excerpt":"We explore the possibility that a new interaction between muons and protons is responsible for the discrepancy between the CODATA value of the proton radius and the value deduced from the measurement of the Lamb shift in muonic hydrogen. We show that a new force carrier with roughly MeV mass can account for the observed energy shift as well as the discrepancy in the muon anomalous magnetic moment. However, measurements in other systems constrain the couplings to electrons and neutrons to be suppressed relative to the couplings to muons and protons, which seems challenging from a theoretical po"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1011.4922","kind":"arxiv","version":1},"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":"2026-05-18T04:18:44Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"on09v2E/7o4o3blfQa9YeQmgUNfNrW0YbvrVSyO/VwD8qi1YeCdGAMgGZZEr9yAnqD/KBNzvFKVBm6R3FutaCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T22:28:44.135742Z"},"content_sha256":"547ac244e8839c0aa88c01940d78916d03bc0d53f0bd2c5be5b537a898e9d406","schema_version":"1.0","event_id":"sha256:547ac244e8839c0aa88c01940d78916d03bc0d53f0bd2c5be5b537a898e9d406"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/VDCTMJQF5RDYFF6NO6XTDE3EHF/bundle.json","state_url":"https://pith.science/pith/VDCTMJQF5RDYFF6NO6XTDE3EHF/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/VDCTMJQF5RDYFF6NO6XTDE3EHF/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":"2026-05-30T22:28:44Z","links":{"resolver":"https://pith.science/pith/VDCTMJQF5RDYFF6NO6XTDE3EHF","bundle":"https://pith.science/pith/VDCTMJQF5RDYFF6NO6XTDE3EHF/bundle.json","state":"https://pith.science/pith/VDCTMJQF5RDYFF6NO6XTDE3EHF/state.json","well_known_bundle":"https://pith.science/.well-known/pith/VDCTMJQF5RDYFF6NO6XTDE3EHF/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2010:VDCTMJQF5RDYFF6NO6XTDE3EHF","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":"f440c8f5e72e8fce8903111cdd630de7eddae46ddeea1c0eee9a12c0207a8517","cross_cats_sorted":["physics.atom-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2010-11-22T20:05:37Z","title_canon_sha256":"c73f39c5d885c215441191cff1878ba8a0a54c4bc2c86a6452686bc85117d82d"},"schema_version":"1.0","source":{"id":"1011.4922","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1011.4922","created_at":"2026-05-18T04:18:44Z"},{"alias_kind":"arxiv_version","alias_value":"1011.4922v1","created_at":"2026-05-18T04:18:44Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1011.4922","created_at":"2026-05-18T04:18:44Z"},{"alias_kind":"pith_short_12","alias_value":"VDCTMJQF5RDY","created_at":"2026-05-18T12:26:15Z"},{"alias_kind":"pith_short_16","alias_value":"VDCTMJQF5RDYFF6N","created_at":"2026-05-18T12:26:15Z"},{"alias_kind":"pith_short_8","alias_value":"VDCTMJQF","created_at":"2026-05-18T12:26:15Z"}],"graph_snapshots":[{"event_id":"sha256:547ac244e8839c0aa88c01940d78916d03bc0d53f0bd2c5be5b537a898e9d406","target":"graph","created_at":"2026-05-18T04:18:44Z","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 explore the possibility that a new interaction between muons and protons is responsible for the discrepancy between the CODATA value of the proton radius and the value deduced from the measurement of the Lamb shift in muonic hydrogen. We show that a new force carrier with roughly MeV mass can account for the observed energy shift as well as the discrepancy in the muon anomalous magnetic moment. However, measurements in other systems constrain the couplings to electrons and neutrons to be suppressed relative to the couplings to muons and protons, which seems challenging from a theoretical po","authors_text":"David Tucker-Smith, Itay Yavin","cross_cats":["physics.atom-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2010-11-22T20:05:37Z","title":"Muonic hydrogen and MeV forces"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1011.4922","kind":"arxiv","version":1},"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":"sha256:1e4e0551327e57d9bbcaa38b7e1b04c3e10dabd1b5130230fed7c9f636d6c912","target":"record","created_at":"2026-05-18T04:18:44Z","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":"f440c8f5e72e8fce8903111cdd630de7eddae46ddeea1c0eee9a12c0207a8517","cross_cats_sorted":["physics.atom-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2010-11-22T20:05:37Z","title_canon_sha256":"c73f39c5d885c215441191cff1878ba8a0a54c4bc2c86a6452686bc85117d82d"},"schema_version":"1.0","source":{"id":"1011.4922","kind":"arxiv","version":1}},"canonical_sha256":"a8c5362605ec478297cd77af31936439709c0da55e828fedbf9e4ab5a08e20c9","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a8c5362605ec478297cd77af31936439709c0da55e828fedbf9e4ab5a08e20c9","first_computed_at":"2026-05-18T04:18:44.795079Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:18:44.795079Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"4NyEZ42PA+LlrtUCGEPr6+nW/yT42XvbysjUWWh0a28IXglGj9aZQ4rJ83ypg2EvMvJQ/EzJ3DdMekNjEbARCQ==","signature_status":"signed_v1","signed_at":"2026-05-18T04:18:44.795720Z","signed_message":"canonical_sha256_bytes"},"source_id":"1011.4922","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:1e4e0551327e57d9bbcaa38b7e1b04c3e10dabd1b5130230fed7c9f636d6c912","sha256:547ac244e8839c0aa88c01940d78916d03bc0d53f0bd2c5be5b537a898e9d406"],"state_sha256":"0cb223db48706f4ea3393c4a93aab3c1cfc3951bacf9c18fda15c865bf4e7a2a"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"xLBpoyuOro1Hg7t2iCGBu+xPNzASU4TY2fcAaCUnUCsD6qmP6DUiZ2o59DctEn2lkd9eZOFgvVNN+ZUwVpqsDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-30T22:28:44.138583Z","bundle_sha256":"5a92a699626e5ac1c9c00dbec5b10b4ad1f7b79bca4c88f031065926990bb048"}}