{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:IIWENDWJL6KDXJNUX4BDLP2MFI","short_pith_number":"pith:IIWENDWJ","canonical_record":{"source":{"id":"1609.04456","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2016-09-14T22:09:32Z","cross_cats_sorted":["nucl-th"],"title_canon_sha256":"8ce3a0784bdda200ce9d120e7fa081a5ed7480c408c5c2210a4ca26b0b8e66fe","abstract_canon_sha256":"337c9b7f6a867888189bcf84081e7b614f65df3754ffceef1825e2074bb58127"},"schema_version":"1.0"},"canonical_sha256":"422c468ec95f943ba5b4bf0235bf4c2a10472a2afab06735108726898fe85a52","source":{"kind":"arxiv","id":"1609.04456","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1609.04456","created_at":"2026-05-18T01:04:36Z"},{"alias_kind":"arxiv_version","alias_value":"1609.04456v1","created_at":"2026-05-18T01:04:36Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1609.04456","created_at":"2026-05-18T01:04:36Z"},{"alias_kind":"pith_short_12","alias_value":"IIWENDWJL6KD","created_at":"2026-05-18T12:30:22Z"},{"alias_kind":"pith_short_16","alias_value":"IIWENDWJL6KDXJNU","created_at":"2026-05-18T12:30:22Z"},{"alias_kind":"pith_short_8","alias_value":"IIWENDWJ","created_at":"2026-05-18T12:30:22Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:IIWENDWJL6KDXJNUX4BDLP2MFI","target":"record","payload":{"canonical_record":{"source":{"id":"1609.04456","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2016-09-14T22:09:32Z","cross_cats_sorted":["nucl-th"],"title_canon_sha256":"8ce3a0784bdda200ce9d120e7fa081a5ed7480c408c5c2210a4ca26b0b8e66fe","abstract_canon_sha256":"337c9b7f6a867888189bcf84081e7b614f65df3754ffceef1825e2074bb58127"},"schema_version":"1.0"},"canonical_sha256":"422c468ec95f943ba5b4bf0235bf4c2a10472a2afab06735108726898fe85a52","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:04:36.661830Z","signature_b64":"PjnnWH1W1J+zpbfaUeP/mfDjO3mLtnOGFcQd/Ysc3XRliRs8LRlxCsQqBzapafKntUg4wqr9QESU8oL4kwA5Cg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"422c468ec95f943ba5b4bf0235bf4c2a10472a2afab06735108726898fe85a52","last_reissued_at":"2026-05-18T01:04:36.661252Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:04:36.661252Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1609.04456","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":"2026-05-18T01:04:36Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"e8aAw97wNmZFLLcBYFlfCUxsSriBa7cI+jtbgJXu+AXRL1v5LHLQdLPFFW9fhGr4B8AcD1wbn53cdsNoSFusBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-06T18:51:03.053375Z"},"content_sha256":"5aa3ee08141a8329069e4ce7a50399e083ebbe3ba95029b6eafd6c19f891e6d9","schema_version":"1.0","event_id":"sha256:5aa3ee08141a8329069e4ce7a50399e083ebbe3ba95029b6eafd6c19f891e6d9"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:IIWENDWJL6KDXJNUX4BDLP2MFI","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Extraction of the proton charge radius from experiments","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["nucl-th"],"primary_cat":"hep-ph","authors_text":"M. Nowakowski, N. G. Kelkar, T. Mart","submitted_at":"2016-09-14T22:09:32Z","abstract_excerpt":"Static properties of hadrons such as their radii and other moments of the electric and magnetic distributions can only be extracted using theoretical methods and not directly measured from experiments. As a result, discrepancies between the extracted values from different precision measurements can exist. The proton charge radius, $r_p$, which is either extracted from electron proton elastic scattering data or from hydrogen atom spectroscopy seems to be no exception. The value $r_p = 0.84087(39)$ fm extracted from muonic hydrogen spectroscopy is about 4% smaller than that obtained from electro"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1609.04456","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":"2026-05-18T01:04:36Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"e6/CFcC5yst8zlOK/uJTGdjRPZ5e+azTJ7FhVSDtK5f6CHapBc4CJupDg0ENPELiTSCh+wkKE8DyVehbqdTSAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-06T18:51:03.053782Z"},"content_sha256":"358e9912301f8b0a2665b1ab5c1a836403e1f7e94b7eee9ac2e5cc6e67a2573d","schema_version":"1.0","event_id":"sha256:358e9912301f8b0a2665b1ab5c1a836403e1f7e94b7eee9ac2e5cc6e67a2573d"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/IIWENDWJL6KDXJNUX4BDLP2MFI/bundle.json","state_url":"https://pith.science/pith/IIWENDWJL6KDXJNUX4BDLP2MFI/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/IIWENDWJL6KDXJNUX4BDLP2MFI/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":"2026-06-06T18:51:03Z","links":{"resolver":"https://pith.science/pith/IIWENDWJL6KDXJNUX4BDLP2MFI","bundle":"https://pith.science/pith/IIWENDWJL6KDXJNUX4BDLP2MFI/bundle.json","state":"https://pith.science/pith/IIWENDWJL6KDXJNUX4BDLP2MFI/state.json","well_known_bundle":"https://pith.science/.well-known/pith/IIWENDWJL6KDXJNUX4BDLP2MFI/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:IIWENDWJL6KDXJNUX4BDLP2MFI","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":"337c9b7f6a867888189bcf84081e7b614f65df3754ffceef1825e2074bb58127","cross_cats_sorted":["nucl-th"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2016-09-14T22:09:32Z","title_canon_sha256":"8ce3a0784bdda200ce9d120e7fa081a5ed7480c408c5c2210a4ca26b0b8e66fe"},"schema_version":"1.0","source":{"id":"1609.04456","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1609.04456","created_at":"2026-05-18T01:04:36Z"},{"alias_kind":"arxiv_version","alias_value":"1609.04456v1","created_at":"2026-05-18T01:04:36Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1609.04456","created_at":"2026-05-18T01:04:36Z"},{"alias_kind":"pith_short_12","alias_value":"IIWENDWJL6KD","created_at":"2026-05-18T12:30:22Z"},{"alias_kind":"pith_short_16","alias_value":"IIWENDWJL6KDXJNU","created_at":"2026-05-18T12:30:22Z"},{"alias_kind":"pith_short_8","alias_value":"IIWENDWJ","created_at":"2026-05-18T12:30:22Z"}],"graph_snapshots":[{"event_id":"sha256:358e9912301f8b0a2665b1ab5c1a836403e1f7e94b7eee9ac2e5cc6e67a2573d","target":"graph","created_at":"2026-05-18T01:04:36Z","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":"Static properties of hadrons such as their radii and other moments of the electric and magnetic distributions can only be extracted using theoretical methods and not directly measured from experiments. As a result, discrepancies between the extracted values from different precision measurements can exist. The proton charge radius, $r_p$, which is either extracted from electron proton elastic scattering data or from hydrogen atom spectroscopy seems to be no exception. The value $r_p = 0.84087(39)$ fm extracted from muonic hydrogen spectroscopy is about 4% smaller than that obtained from electro","authors_text":"M. Nowakowski, N. G. Kelkar, T. Mart","cross_cats":["nucl-th"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2016-09-14T22:09:32Z","title":"Extraction of the proton charge radius from experiments"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1609.04456","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":"sha256:5aa3ee08141a8329069e4ce7a50399e083ebbe3ba95029b6eafd6c19f891e6d9","target":"record","created_at":"2026-05-18T01:04:36Z","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":"337c9b7f6a867888189bcf84081e7b614f65df3754ffceef1825e2074bb58127","cross_cats_sorted":["nucl-th"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2016-09-14T22:09:32Z","title_canon_sha256":"8ce3a0784bdda200ce9d120e7fa081a5ed7480c408c5c2210a4ca26b0b8e66fe"},"schema_version":"1.0","source":{"id":"1609.04456","kind":"arxiv","version":1}},"canonical_sha256":"422c468ec95f943ba5b4bf0235bf4c2a10472a2afab06735108726898fe85a52","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"422c468ec95f943ba5b4bf0235bf4c2a10472a2afab06735108726898fe85a52","first_computed_at":"2026-05-18T01:04:36.661252Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:04:36.661252Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"PjnnWH1W1J+zpbfaUeP/mfDjO3mLtnOGFcQd/Ysc3XRliRs8LRlxCsQqBzapafKntUg4wqr9QESU8oL4kwA5Cg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:04:36.661830Z","signed_message":"canonical_sha256_bytes"},"source_id":"1609.04456","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:5aa3ee08141a8329069e4ce7a50399e083ebbe3ba95029b6eafd6c19f891e6d9","sha256:358e9912301f8b0a2665b1ab5c1a836403e1f7e94b7eee9ac2e5cc6e67a2573d"],"state_sha256":"085868be1e00814f56e1f6aa72676732e87c97faa246460ebd96a6e1c2c14a2a"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"JBhjRuHTPYo8ehOsPDDVS2xGfgf/xoditld8ZX4Xm3g0w1q+UclaB9yhkoZG/uG6Kzo5C5N4+K6V+6Gn/Yz+CQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-06T18:51:03.057673Z","bundle_sha256":"b9b527423b74798112933b06ae73e515fc4af383ea01fe598a466368a81ff9e5"}}