{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:IW4C4H6XP5NX7ESRUJU5QIANGL","short_pith_number":"pith:IW4C4H6X","canonical_record":{"source":{"id":"1311.5104","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2013-11-20T15:40:52Z","cross_cats_sorted":["hep-ex"],"title_canon_sha256":"52e42124823928bd18e8d5e8ba28e672ab76203dcda4407ee0772dc5c7149757","abstract_canon_sha256":"a24d90c21734a5c6c55225ce35a69c1cd180c5ee7b0f001118d620545c767517"},"schema_version":"1.0"},"canonical_sha256":"45b82e1fd77f5b7f9251a269d8200d32cf9a2d0cdf4b857a5307bce54c296590","source":{"kind":"arxiv","id":"1311.5104","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1311.5104","created_at":"2026-05-18T01:46:12Z"},{"alias_kind":"arxiv_version","alias_value":"1311.5104v1","created_at":"2026-05-18T01:46:12Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1311.5104","created_at":"2026-05-18T01:46:12Z"},{"alias_kind":"pith_short_12","alias_value":"IW4C4H6XP5NX","created_at":"2026-05-18T12:27:49Z"},{"alias_kind":"pith_short_16","alias_value":"IW4C4H6XP5NX7ESR","created_at":"2026-05-18T12:27:49Z"},{"alias_kind":"pith_short_8","alias_value":"IW4C4H6X","created_at":"2026-05-18T12:27:49Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:IW4C4H6XP5NX7ESRUJU5QIANGL","target":"record","payload":{"canonical_record":{"source":{"id":"1311.5104","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2013-11-20T15:40:52Z","cross_cats_sorted":["hep-ex"],"title_canon_sha256":"52e42124823928bd18e8d5e8ba28e672ab76203dcda4407ee0772dc5c7149757","abstract_canon_sha256":"a24d90c21734a5c6c55225ce35a69c1cd180c5ee7b0f001118d620545c767517"},"schema_version":"1.0"},"canonical_sha256":"45b82e1fd77f5b7f9251a269d8200d32cf9a2d0cdf4b857a5307bce54c296590","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:46:12.123070Z","signature_b64":"qwrUrSpY8LRfkEjxifeg2P1Tqh5eg3d8LW/pQvFIn1dnFQcf3HD7hH0SylcR6luuhUYVJHFP5otD/WahnZgIDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"45b82e1fd77f5b7f9251a269d8200d32cf9a2d0cdf4b857a5307bce54c296590","last_reissued_at":"2026-05-18T01:46:12.122614Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:46:12.122614Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1311.5104","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":"2026-05-18T01:46:12Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"XwNfM7r+n5MP0Y6VtPYCasfDAkqZVuq6V6RpRehF337x/WXRRPYhv46PxMR5DgzsNwJYkFuMtYx/LY6rJjI3BA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T04:33:17.621715Z"},"content_sha256":"bb99aeeb67e089a891e673ac3b868dcb3f2f8541a8b44e30679693d5eeda7209","schema_version":"1.0","event_id":"sha256:bb99aeeb67e089a891e673ac3b868dcb3f2f8541a8b44e30679693d5eeda7209"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:IW4C4H6XP5NX7ESRUJU5QIANGL","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Study of the discovery potential for hidden photon emission at future electron scattering fixed target experiments","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["hep-ex"],"primary_cat":"hep-ph","authors_text":"M. Vanderhaeghen, T. Beranek","submitted_at":"2013-11-20T15:40:52Z","abstract_excerpt":"Electron scattering fixed target experiments are a versatile tool to explore various physics phenomena. Recently these experiments came into focus to search for $U(1)$ extensions of the Standard Model of particle physics at low energies. These extensions are motivated from anomalies in astrophysical observations as well as from deviations from Standard Model predictions, such as the discrepancy between the experimental and theoretical determination of the anomalous magnetic moment of the muon. They also arise naturally when the Standard Model is embedded into a more general theory. In the cons"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1311.5104","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":"2026-05-18T01:46:12Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"eqpt6RHeYBrGG4iqVimv6OiiKb6lDQCIeD9R3dkDsHzQ0g5ZXRjmZdkY/ognS/fFJq6V+xUxgar/X59h+S/gBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T04:33:17.622265Z"},"content_sha256":"44be79bd831ec3a0c55c540602b12e002b74ccb17a65d78591b331d91847add7","schema_version":"1.0","event_id":"sha256:44be79bd831ec3a0c55c540602b12e002b74ccb17a65d78591b331d91847add7"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/IW4C4H6XP5NX7ESRUJU5QIANGL/bundle.json","state_url":"https://pith.science/pith/IW4C4H6XP5NX7ESRUJU5QIANGL/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/IW4C4H6XP5NX7ESRUJU5QIANGL/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":"2026-05-31T04:33:17Z","links":{"resolver":"https://pith.science/pith/IW4C4H6XP5NX7ESRUJU5QIANGL","bundle":"https://pith.science/pith/IW4C4H6XP5NX7ESRUJU5QIANGL/bundle.json","state":"https://pith.science/pith/IW4C4H6XP5NX7ESRUJU5QIANGL/state.json","well_known_bundle":"https://pith.science/.well-known/pith/IW4C4H6XP5NX7ESRUJU5QIANGL/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:IW4C4H6XP5NX7ESRUJU5QIANGL","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":"a24d90c21734a5c6c55225ce35a69c1cd180c5ee7b0f001118d620545c767517","cross_cats_sorted":["hep-ex"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2013-11-20T15:40:52Z","title_canon_sha256":"52e42124823928bd18e8d5e8ba28e672ab76203dcda4407ee0772dc5c7149757"},"schema_version":"1.0","source":{"id":"1311.5104","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1311.5104","created_at":"2026-05-18T01:46:12Z"},{"alias_kind":"arxiv_version","alias_value":"1311.5104v1","created_at":"2026-05-18T01:46:12Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1311.5104","created_at":"2026-05-18T01:46:12Z"},{"alias_kind":"pith_short_12","alias_value":"IW4C4H6XP5NX","created_at":"2026-05-18T12:27:49Z"},{"alias_kind":"pith_short_16","alias_value":"IW4C4H6XP5NX7ESR","created_at":"2026-05-18T12:27:49Z"},{"alias_kind":"pith_short_8","alias_value":"IW4C4H6X","created_at":"2026-05-18T12:27:49Z"}],"graph_snapshots":[{"event_id":"sha256:44be79bd831ec3a0c55c540602b12e002b74ccb17a65d78591b331d91847add7","target":"graph","created_at":"2026-05-18T01:46:12Z","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":"Electron scattering fixed target experiments are a versatile tool to explore various physics phenomena. Recently these experiments came into focus to search for $U(1)$ extensions of the Standard Model of particle physics at low energies. These extensions are motivated from anomalies in astrophysical observations as well as from deviations from Standard Model predictions, such as the discrepancy between the experimental and theoretical determination of the anomalous magnetic moment of the muon. They also arise naturally when the Standard Model is embedded into a more general theory. In the cons","authors_text":"M. Vanderhaeghen, T. Beranek","cross_cats":["hep-ex"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2013-11-20T15:40:52Z","title":"Study of the discovery potential for hidden photon emission at future electron scattering fixed target experiments"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1311.5104","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:bb99aeeb67e089a891e673ac3b868dcb3f2f8541a8b44e30679693d5eeda7209","target":"record","created_at":"2026-05-18T01:46:12Z","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":"a24d90c21734a5c6c55225ce35a69c1cd180c5ee7b0f001118d620545c767517","cross_cats_sorted":["hep-ex"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2013-11-20T15:40:52Z","title_canon_sha256":"52e42124823928bd18e8d5e8ba28e672ab76203dcda4407ee0772dc5c7149757"},"schema_version":"1.0","source":{"id":"1311.5104","kind":"arxiv","version":1}},"canonical_sha256":"45b82e1fd77f5b7f9251a269d8200d32cf9a2d0cdf4b857a5307bce54c296590","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"45b82e1fd77f5b7f9251a269d8200d32cf9a2d0cdf4b857a5307bce54c296590","first_computed_at":"2026-05-18T01:46:12.122614Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:46:12.122614Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"qwrUrSpY8LRfkEjxifeg2P1Tqh5eg3d8LW/pQvFIn1dnFQcf3HD7hH0SylcR6luuhUYVJHFP5otD/WahnZgIDg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:46:12.123070Z","signed_message":"canonical_sha256_bytes"},"source_id":"1311.5104","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:bb99aeeb67e089a891e673ac3b868dcb3f2f8541a8b44e30679693d5eeda7209","sha256:44be79bd831ec3a0c55c540602b12e002b74ccb17a65d78591b331d91847add7"],"state_sha256":"3024bb738a55e71c9a681ce9c03b6a26bfc94c59d09b2887cf442ce468c81d3c"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"oY1bIL4E0twO8mohF30JjuEBjlY3J9MAWOUwLBn2Z5wBqQWdmxYEZymRF1uWXfi3mGy3TqyjS/e3ZPw0uF+wDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-31T04:33:17.625697Z","bundle_sha256":"eed15b6b1225fb187e966e23c294db4488efe1ad97faefd533fbbb033a20455d"}}