{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:2KBEFLONPSSYTJNFVNOB7VB3DF","short_pith_number":"pith:2KBEFLON","canonical_record":{"source":{"id":"2102.13022","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-ex","submitted_at":"2021-02-25T17:26:38Z","cross_cats_sorted":["hep-ex","hep-ph","nucl-th"],"title_canon_sha256":"f4f9e579ac208265e0d1e497cc0fe052c12675d78c47b9c14778c04625d10644","abstract_canon_sha256":"c5553492ebf5642dd06d927df9fdff55118b34a771defed75349ec81434b344c"},"schema_version":"1.0"},"canonical_sha256":"d28242adcd7ca589a5a5ab5c1fd43b197c6a584fd28ab643e48e04925f9d7fd2","source":{"kind":"arxiv","id":"2102.13022","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2102.13022","created_at":"2026-07-05T04:02:08Z"},{"alias_kind":"arxiv_version","alias_value":"2102.13022v3","created_at":"2026-07-05T04:02:08Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2102.13022","created_at":"2026-07-05T04:02:08Z"},{"alias_kind":"pith_short_12","alias_value":"2KBEFLONPSSY","created_at":"2026-07-05T04:02:08Z"},{"alias_kind":"pith_short_16","alias_value":"2KBEFLONPSSYTJNF","created_at":"2026-07-05T04:02:08Z"},{"alias_kind":"pith_short_8","alias_value":"2KBEFLON","created_at":"2026-07-05T04:02:08Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:2KBEFLONPSSYTJNFVNOB7VB3DF","target":"record","payload":{"canonical_record":{"source":{"id":"2102.13022","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-ex","submitted_at":"2021-02-25T17:26:38Z","cross_cats_sorted":["hep-ex","hep-ph","nucl-th"],"title_canon_sha256":"f4f9e579ac208265e0d1e497cc0fe052c12675d78c47b9c14778c04625d10644","abstract_canon_sha256":"c5553492ebf5642dd06d927df9fdff55118b34a771defed75349ec81434b344c"},"schema_version":"1.0"},"canonical_sha256":"d28242adcd7ca589a5a5ab5c1fd43b197c6a584fd28ab643e48e04925f9d7fd2","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T04:02:08.973381Z","signature_b64":"jnDmSv+r6J7q/VHGn/5wWZYdZwbWGbIudZLNAUcH3658pcbctAkk0XmulvKZYGIOocj9gkIEqilLNR02agMaAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d28242adcd7ca589a5a5ab5c1fd43b197c6a584fd28ab643e48e04925f9d7fd2","last_reissued_at":"2026-07-05T04:02:08.972955Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T04:02:08.972955Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2102.13022","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":"2026-07-05T04:02:08Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"RwSZIe2XwFNKSLSJe/u81TdUSFsDJ0Ofys6lajd8yAt/+bDb8+hJwK3vq/gyBDAVaL5sC5jadZ3LGaZU6KnvAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-07T18:46:25.783862Z"},"content_sha256":"dad840cfccb54fa4bea2817b6e5b16c8943c0b58316164486c0e6a79af6c1b97","schema_version":"1.0","event_id":"sha256:dad840cfccb54fa4bea2817b6e5b16c8943c0b58316164486c0e6a79af6c1b97"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:2KBEFLONPSSYTJNFVNOB7VB3DF","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Transverse charge density and the radius of the proton","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["hep-ex","hep-ph","nucl-th"],"primary_cat":"nucl-ex","authors_text":"Alexander V. Gramolin, Rebecca L. Russell","submitted_at":"2021-02-25T17:26:38Z","abstract_excerpt":"A puzzling discrepancy exists between the values of the proton charge radius obtained using different experimental techniques: elastic electron-proton scattering and spectroscopy of electronic and muonic hydrogen. The proton radius is defined through the slope of the electric form factor, $G_E(Q^2)$, at zero four-momentum transfer, which is inaccessible in scattering experiments. We propose a novel method for extracting the proton radius from scattering data over a broad $Q^2$ range rather than attempting to directly determine the slope of $G_E$ at $Q^2 = 0$. This method relates the radius of "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2102.13022","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/2102.13022/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":"2026-07-05T04:02:08Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"BWR54eZHAqMR3g68MeeKqa47uxCVnbOxtaBn1g+WxhWdtZ2yEPkK+xOegtukzCUVqhUHtvnAmBcqtZhmUjqTBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-07T18:46:25.784420Z"},"content_sha256":"9d08457a9b187e00ec9e8ebee6af2a563d5e7b74c0528f1c28307a2d74faca21","schema_version":"1.0","event_id":"sha256:9d08457a9b187e00ec9e8ebee6af2a563d5e7b74c0528f1c28307a2d74faca21"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/2KBEFLONPSSYTJNFVNOB7VB3DF/bundle.json","state_url":"https://pith.science/pith/2KBEFLONPSSYTJNFVNOB7VB3DF/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/2KBEFLONPSSYTJNFVNOB7VB3DF/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":"2026-08-07T18:46:25Z","links":{"resolver":"https://pith.science/pith/2KBEFLONPSSYTJNFVNOB7VB3DF","bundle":"https://pith.science/pith/2KBEFLONPSSYTJNFVNOB7VB3DF/bundle.json","state":"https://pith.science/pith/2KBEFLONPSSYTJNFVNOB7VB3DF/state.json","well_known_bundle":"https://pith.science/.well-known/pith/2KBEFLONPSSYTJNFVNOB7VB3DF/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:2KBEFLONPSSYTJNFVNOB7VB3DF","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":"c5553492ebf5642dd06d927df9fdff55118b34a771defed75349ec81434b344c","cross_cats_sorted":["hep-ex","hep-ph","nucl-th"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-ex","submitted_at":"2021-02-25T17:26:38Z","title_canon_sha256":"f4f9e579ac208265e0d1e497cc0fe052c12675d78c47b9c14778c04625d10644"},"schema_version":"1.0","source":{"id":"2102.13022","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2102.13022","created_at":"2026-07-05T04:02:08Z"},{"alias_kind":"arxiv_version","alias_value":"2102.13022v3","created_at":"2026-07-05T04:02:08Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2102.13022","created_at":"2026-07-05T04:02:08Z"},{"alias_kind":"pith_short_12","alias_value":"2KBEFLONPSSY","created_at":"2026-07-05T04:02:08Z"},{"alias_kind":"pith_short_16","alias_value":"2KBEFLONPSSYTJNF","created_at":"2026-07-05T04:02:08Z"},{"alias_kind":"pith_short_8","alias_value":"2KBEFLON","created_at":"2026-07-05T04:02:08Z"}],"graph_snapshots":[{"event_id":"sha256:9d08457a9b187e00ec9e8ebee6af2a563d5e7b74c0528f1c28307a2d74faca21","target":"graph","created_at":"2026-07-05T04:02:08Z","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/2102.13022/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"A puzzling discrepancy exists between the values of the proton charge radius obtained using different experimental techniques: elastic electron-proton scattering and spectroscopy of electronic and muonic hydrogen. The proton radius is defined through the slope of the electric form factor, $G_E(Q^2)$, at zero four-momentum transfer, which is inaccessible in scattering experiments. We propose a novel method for extracting the proton radius from scattering data over a broad $Q^2$ range rather than attempting to directly determine the slope of $G_E$ at $Q^2 = 0$. This method relates the radius of ","authors_text":"Alexander V. Gramolin, Rebecca L. Russell","cross_cats":["hep-ex","hep-ph","nucl-th"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-ex","submitted_at":"2021-02-25T17:26:38Z","title":"Transverse charge density and the radius of the proton"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2102.13022","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:dad840cfccb54fa4bea2817b6e5b16c8943c0b58316164486c0e6a79af6c1b97","target":"record","created_at":"2026-07-05T04:02:08Z","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":"c5553492ebf5642dd06d927df9fdff55118b34a771defed75349ec81434b344c","cross_cats_sorted":["hep-ex","hep-ph","nucl-th"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-ex","submitted_at":"2021-02-25T17:26:38Z","title_canon_sha256":"f4f9e579ac208265e0d1e497cc0fe052c12675d78c47b9c14778c04625d10644"},"schema_version":"1.0","source":{"id":"2102.13022","kind":"arxiv","version":3}},"canonical_sha256":"d28242adcd7ca589a5a5ab5c1fd43b197c6a584fd28ab643e48e04925f9d7fd2","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d28242adcd7ca589a5a5ab5c1fd43b197c6a584fd28ab643e48e04925f9d7fd2","first_computed_at":"2026-07-05T04:02:08.972955Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T04:02:08.972955Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"jnDmSv+r6J7q/VHGn/5wWZYdZwbWGbIudZLNAUcH3658pcbctAkk0XmulvKZYGIOocj9gkIEqilLNR02agMaAg==","signature_status":"signed_v1","signed_at":"2026-07-05T04:02:08.973381Z","signed_message":"canonical_sha256_bytes"},"source_id":"2102.13022","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:dad840cfccb54fa4bea2817b6e5b16c8943c0b58316164486c0e6a79af6c1b97","sha256:9d08457a9b187e00ec9e8ebee6af2a563d5e7b74c0528f1c28307a2d74faca21"],"state_sha256":"a2793cfc97c9d2fbdc7ac1b0e3d673cfa4e45acf746f069318a25e8eb4f3ec4d"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"GKv5pgLG0WuHLF9t6G96Smisd5CNR0SFYaNuxc8CF64lb8x5ZGmQ01BZTEc9o1NqTJqG8p2XgzQrbNVZwa3rDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-07T18:46:25.789591Z","bundle_sha256":"cd9a5b4c6e6c334985caa75e043fc2e4c66e060a136a4e5daf944d9145643eb0"}}