{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:T5ZQBACZ7JSEMLRI6W3YSXVD3E","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":"6992a48a8fdc5a7ca619121fe1ced1f44547606c690a008cd2d8feaf88fe0052","cross_cats_sorted":["hep-ex","nucl-ex","nucl-th"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2016-04-25T20:00:03Z","title_canon_sha256":"cdaec3e60fab25b98ecc316621c800970a0666171f6345ce7238e512652114f4"},"schema_version":"1.0","source":{"id":"1604.07411","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1604.07411","created_at":"2026-05-18T01:08:41Z"},{"alias_kind":"arxiv_version","alias_value":"1604.07411v2","created_at":"2026-05-18T01:08:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1604.07411","created_at":"2026-05-18T01:08:41Z"},{"alias_kind":"pith_short_12","alias_value":"T5ZQBACZ7JSE","created_at":"2026-05-18T12:30:44Z"},{"alias_kind":"pith_short_16","alias_value":"T5ZQBACZ7JSEMLRI","created_at":"2026-05-18T12:30:44Z"},{"alias_kind":"pith_short_8","alias_value":"T5ZQBACZ","created_at":"2026-05-18T12:30:44Z"}],"graph_snapshots":[{"event_id":"sha256:bc9433c4f66e53c6ad048c1a8aac32f536e716f944954fcf0fb5ca42938a17e4","target":"graph","created_at":"2026-05-18T01:08:41Z","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":"Recently a 6.8$\\sigma$ anomaly has been reported in the opening angle and invariant mass distributions of $e^+ e^-$ pairs produced in $^8\\text{Be}$ nuclear transitions. The data are explained by a 17 MeV vector gauge boson $X$ that is produced in the decay of an excited state to the ground state, $^8\\text{Be}^* \\to {}^8\\text{Be} \\, X$, and then decays through $X \\to e^+ e^-$. The $X$ boson mediates a fifth force with a characteristic range of 12 fm and has milli-charged couplings to up and down quarks and electrons, and a proton coupling that is suppressed relative to neutrons. The protophobic","authors_text":"Bartosz Fornal, Iftah Galon, Jonathan L. Feng, Jordan Smolinsky, Philip Tanedo, Susan Gardner, Tim M. P. Tait","cross_cats":["hep-ex","nucl-ex","nucl-th"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2016-04-25T20:00:03Z","title":"Protophobic Fifth Force Interpretation of the Observed Anomaly in $^8$Be Nuclear Transitions"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1604.07411","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:c42b4cf6ab017d5909908bcb7683713b48a294b358e93a20e29a25d2de9f8619","target":"record","created_at":"2026-05-18T01:08:41Z","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":"6992a48a8fdc5a7ca619121fe1ced1f44547606c690a008cd2d8feaf88fe0052","cross_cats_sorted":["hep-ex","nucl-ex","nucl-th"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2016-04-25T20:00:03Z","title_canon_sha256":"cdaec3e60fab25b98ecc316621c800970a0666171f6345ce7238e512652114f4"},"schema_version":"1.0","source":{"id":"1604.07411","kind":"arxiv","version":2}},"canonical_sha256":"9f73008059fa64462e28f5b7895ea3d92f5d6393600889b7dda28a11f240e0a9","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"9f73008059fa64462e28f5b7895ea3d92f5d6393600889b7dda28a11f240e0a9","first_computed_at":"2026-05-18T01:08:41.761678Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:08:41.761678Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"aCLPb52PCA7aepdVGrHcJ7DjlST2Z9lMhC4RKaEvQmicrj10DVvbh2XQGIuKCHtUTHDI2sAsxuIVcFPCXDEeAg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:08:41.762348Z","signed_message":"canonical_sha256_bytes"},"source_id":"1604.07411","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:c42b4cf6ab017d5909908bcb7683713b48a294b358e93a20e29a25d2de9f8619","sha256:bc9433c4f66e53c6ad048c1a8aac32f536e716f944954fcf0fb5ca42938a17e4"],"state_sha256":"7643e6981c4886d70cf4d34ff3e152f79db5c0d5a855f5ed53cf93817d891d27"}