{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:LRI6U4NMZEPIWQBK2HS5JRMUXR","short_pith_number":"pith:LRI6U4NM","canonical_record":{"source":{"id":"1509.03235","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2015-09-10T17:18:37Z","cross_cats_sorted":[],"title_canon_sha256":"60e292240c3eea31801d1242b9da3d81735e1db33e4b750bfce968b394145348","abstract_canon_sha256":"242636d57a54a40fc4216f0ab68fe7e545c6a2b9bede94a1d2928a88343c4644"},"schema_version":"1.0"},"canonical_sha256":"5c51ea71acc91e8b402ad1e5d4c594bc629085a69dd1e2c4149ccb8faf801375","source":{"kind":"arxiv","id":"1509.03235","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1509.03235","created_at":"2026-05-18T01:16:48Z"},{"alias_kind":"arxiv_version","alias_value":"1509.03235v2","created_at":"2026-05-18T01:16:48Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1509.03235","created_at":"2026-05-18T01:16:48Z"},{"alias_kind":"pith_short_12","alias_value":"LRI6U4NMZEPI","created_at":"2026-05-18T12:29:29Z"},{"alias_kind":"pith_short_16","alias_value":"LRI6U4NMZEPIWQBK","created_at":"2026-05-18T12:29:29Z"},{"alias_kind":"pith_short_8","alias_value":"LRI6U4NM","created_at":"2026-05-18T12:29:29Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:LRI6U4NMZEPIWQBK2HS5JRMUXR","target":"record","payload":{"canonical_record":{"source":{"id":"1509.03235","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2015-09-10T17:18:37Z","cross_cats_sorted":[],"title_canon_sha256":"60e292240c3eea31801d1242b9da3d81735e1db33e4b750bfce968b394145348","abstract_canon_sha256":"242636d57a54a40fc4216f0ab68fe7e545c6a2b9bede94a1d2928a88343c4644"},"schema_version":"1.0"},"canonical_sha256":"5c51ea71acc91e8b402ad1e5d4c594bc629085a69dd1e2c4149ccb8faf801375","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:16:48.779015Z","signature_b64":"N7RVTZjcBWC963xUULOKWt1c5528Tzmfj83iF6EKGhP9Ym4KL38F0q5dB5/hOAM4YaGacreOE1CLIzodXxDTBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"5c51ea71acc91e8b402ad1e5d4c594bc629085a69dd1e2c4149ccb8faf801375","last_reissued_at":"2026-05-18T01:16:48.778298Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:16:48.778298Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1509.03235","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":"2026-05-18T01:16:48Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"n/CgBZENKDYvqWQfknE+qAPsq0QLbIzER0KfLjZbLkd+DrlzvwH8KQgEd3o/cfBlNZpxhvOLT/hNa9hy5oTwAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-20T15:51:27.373958Z"},"content_sha256":"a850bc70961d14d371d86df211faa060ad3af4a6d9352bc6ce5c9b4138a291a3","schema_version":"1.0","event_id":"sha256:a850bc70961d14d371d86df211faa060ad3af4a6d9352bc6ce5c9b4138a291a3"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:LRI6U4NMZEPIWQBK2HS5JRMUXR","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Experiments towards resolving the proton charge radius puzzle","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.atom-ph","authors_text":"A. Antognini, A. J. Dax, A. Knecht, A. L. Gouvea, A. Voss, B. Franke, B. Weichelt, C. I. Szabo, C. M. B. Monteiro, D. S. Covita, D. Taqqu, F. Biraben, F. D. Amaro, F. Kottmann, F. Mulhauser, F. Nez, J. F. C. A. Veloso, J. G\\\"otzfried, J. J. Krauth, J. Machado, J. M. F. dos Santos, J. P. Santos, K. Kirch, K. Schuhmann, L. Julien, L. M. P. Fernandes, M. Abdou-Ahmed, M. Diepold, M. Hildebrandt, P. Amaro, P. Indelicato, R. Pohl, S. Galtier, T. Graf, T.-L. Chen, T. W. H\\\"ansch, Y.-W. Liu","submitted_at":"2015-09-10T17:18:37Z","abstract_excerpt":"We review the status of the proton charge radius puzzle. Emphasis is given to the various experiments initiated to resolve the conflict between the muonic hydrogen results and the results from scattering and regular hydrogen spectroscopy."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1509.03235","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":"2026-05-18T01:16:48Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Ak0MPD4af5jJzSKxPfa3aoobc4F64qoj52L3Oi39gKPlk4DuUChwzUnpveRdLodkNQ4uUSr6179T8NwbE5BfAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-20T15:51:27.374572Z"},"content_sha256":"b7643a8ef351d950b68fce36ff9455d18a29d826780b17843f55d8fcb4b18973","schema_version":"1.0","event_id":"sha256:b7643a8ef351d950b68fce36ff9455d18a29d826780b17843f55d8fcb4b18973"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/LRI6U4NMZEPIWQBK2HS5JRMUXR/bundle.json","state_url":"https://pith.science/pith/LRI6U4NMZEPIWQBK2HS5JRMUXR/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/LRI6U4NMZEPIWQBK2HS5JRMUXR/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":"2026-05-20T15:51:27Z","links":{"resolver":"https://pith.science/pith/LRI6U4NMZEPIWQBK2HS5JRMUXR","bundle":"https://pith.science/pith/LRI6U4NMZEPIWQBK2HS5JRMUXR/bundle.json","state":"https://pith.science/pith/LRI6U4NMZEPIWQBK2HS5JRMUXR/state.json","well_known_bundle":"https://pith.science/.well-known/pith/LRI6U4NMZEPIWQBK2HS5JRMUXR/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:LRI6U4NMZEPIWQBK2HS5JRMUXR","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":"242636d57a54a40fc4216f0ab68fe7e545c6a2b9bede94a1d2928a88343c4644","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2015-09-10T17:18:37Z","title_canon_sha256":"60e292240c3eea31801d1242b9da3d81735e1db33e4b750bfce968b394145348"},"schema_version":"1.0","source":{"id":"1509.03235","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1509.03235","created_at":"2026-05-18T01:16:48Z"},{"alias_kind":"arxiv_version","alias_value":"1509.03235v2","created_at":"2026-05-18T01:16:48Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1509.03235","created_at":"2026-05-18T01:16:48Z"},{"alias_kind":"pith_short_12","alias_value":"LRI6U4NMZEPI","created_at":"2026-05-18T12:29:29Z"},{"alias_kind":"pith_short_16","alias_value":"LRI6U4NMZEPIWQBK","created_at":"2026-05-18T12:29:29Z"},{"alias_kind":"pith_short_8","alias_value":"LRI6U4NM","created_at":"2026-05-18T12:29:29Z"}],"graph_snapshots":[{"event_id":"sha256:b7643a8ef351d950b68fce36ff9455d18a29d826780b17843f55d8fcb4b18973","target":"graph","created_at":"2026-05-18T01:16:48Z","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 review the status of the proton charge radius puzzle. Emphasis is given to the various experiments initiated to resolve the conflict between the muonic hydrogen results and the results from scattering and regular hydrogen spectroscopy.","authors_text":"A. Antognini, A. J. Dax, A. Knecht, A. L. Gouvea, A. Voss, B. Franke, B. Weichelt, C. I. Szabo, C. M. B. Monteiro, D. S. Covita, D. Taqqu, F. Biraben, F. D. Amaro, F. Kottmann, F. Mulhauser, F. Nez, J. F. C. A. Veloso, J. G\\\"otzfried, J. J. Krauth, J. Machado, J. M. F. dos Santos, J. P. Santos, K. Kirch, K. Schuhmann, L. Julien, L. M. P. Fernandes, M. Abdou-Ahmed, M. Diepold, M. Hildebrandt, P. Amaro, P. Indelicato, R. Pohl, S. Galtier, T. Graf, T.-L. Chen, T. W. H\\\"ansch, Y.-W. Liu","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2015-09-10T17:18:37Z","title":"Experiments towards resolving the proton charge radius puzzle"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1509.03235","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:a850bc70961d14d371d86df211faa060ad3af4a6d9352bc6ce5c9b4138a291a3","target":"record","created_at":"2026-05-18T01:16:48Z","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":"242636d57a54a40fc4216f0ab68fe7e545c6a2b9bede94a1d2928a88343c4644","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2015-09-10T17:18:37Z","title_canon_sha256":"60e292240c3eea31801d1242b9da3d81735e1db33e4b750bfce968b394145348"},"schema_version":"1.0","source":{"id":"1509.03235","kind":"arxiv","version":2}},"canonical_sha256":"5c51ea71acc91e8b402ad1e5d4c594bc629085a69dd1e2c4149ccb8faf801375","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"5c51ea71acc91e8b402ad1e5d4c594bc629085a69dd1e2c4149ccb8faf801375","first_computed_at":"2026-05-18T01:16:48.778298Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:16:48.778298Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"N7RVTZjcBWC963xUULOKWt1c5528Tzmfj83iF6EKGhP9Ym4KL38F0q5dB5/hOAM4YaGacreOE1CLIzodXxDTBA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:16:48.779015Z","signed_message":"canonical_sha256_bytes"},"source_id":"1509.03235","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a850bc70961d14d371d86df211faa060ad3af4a6d9352bc6ce5c9b4138a291a3","sha256:b7643a8ef351d950b68fce36ff9455d18a29d826780b17843f55d8fcb4b18973"],"state_sha256":"5761d64119703bf1ce0bb3ebd7810bec9aed9a073d9f67dfdd5e968a01057e59"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Au3iFPYR9TQJtkOEY8x8X5Ky2rs/d99nVh+jAx3ILE+sVaK2RAirV71+yLbMYUTlfLRKAXZKilBCs4RmJVkWCw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-20T15:51:27.377454Z","bundle_sha256":"9adf81f043dd00e9f5cf72867d41dd8188104939ab49562612229d8b1b5e75c9"}}