{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2003:HHY7R523JDTL647LPEP6ZN4UMI","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":"4c06c90c93d2075a11c08063e12d29a4305ccb5244e4a46e72b975a23e84789d","cross_cats_sorted":[],"license":"","primary_cat":"nucl-ex","submitted_at":"2003-02-21T15:57:00Z","title_canon_sha256":"dcd25a08a2cd70838921ce70d95c978a9c82f1ad06f863aafa0bd4bcaf460956"},"schema_version":"1.0","source":{"id":"nucl-ex/0302025","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"nucl-ex/0302025","created_at":"2026-07-04T16:41:48Z"},{"alias_kind":"arxiv_version","alias_value":"nucl-ex/0302025v1","created_at":"2026-07-04T16:41:48Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.nucl-ex/0302025","created_at":"2026-07-04T16:41:48Z"},{"alias_kind":"pith_short_12","alias_value":"HHY7R523JDTL","created_at":"2026-07-04T16:41:48Z"},{"alias_kind":"pith_short_16","alias_value":"HHY7R523JDTL647L","created_at":"2026-07-04T16:41:48Z"},{"alias_kind":"pith_short_8","alias_value":"HHY7R523","created_at":"2026-07-04T16:41:48Z"}],"graph_snapshots":[{"event_id":"sha256:65d53462f190c9ce1d1672198917d455189143a89ee393f2ff7dd74609d234a7","target":"graph","created_at":"2026-07-04T16:41:48Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/nucl-ex/0302025/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Motivated by the theoretical hypotheses on the existence of heretofore unobserved stable elementary particles and exotic nuclear states, we searched for doubly-charged particles, as anomalously heavy isotopes of helium, in the Earth's atmoshpere using a sensitive laser spectroscopy technique. The concentration of noble-gas-like atoms in the atmosphere and the subsequent very large depletion of the light He-3,4 isotopes allow us to set stringent limits on th abundance: 10^-13 to 10^-17 per atom in the solar system, over the mass range of 20 to 10,000 amu.","authors_text":"J. P. Schiffer, L.-B. Wang, P. Mueller, R. J. Holt, T. P. O'Connor, Z.-T. Lu","cross_cats":[],"headline":"","license":"","primary_cat":"nucl-ex","submitted_at":"2003-02-21T15:57:00Z","title":"Search for anomalously heavy isotopes of helium in the Earth's atmosphere"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"nucl-ex/0302025","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:f982e0357f17ca4466b71399063ca00d752e164d937b4a5897b2169e350cb256","target":"record","created_at":"2026-07-04T16:41:48Z","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":"4c06c90c93d2075a11c08063e12d29a4305ccb5244e4a46e72b975a23e84789d","cross_cats_sorted":[],"license":"","primary_cat":"nucl-ex","submitted_at":"2003-02-21T15:57:00Z","title_canon_sha256":"dcd25a08a2cd70838921ce70d95c978a9c82f1ad06f863aafa0bd4bcaf460956"},"schema_version":"1.0","source":{"id":"nucl-ex/0302025","kind":"arxiv","version":1}},"canonical_sha256":"39f1f8f75b48e6bf73eb791fecb794622b32c4d70162f6a2947b85cfcc941704","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"39f1f8f75b48e6bf73eb791fecb794622b32c4d70162f6a2947b85cfcc941704","first_computed_at":"2026-07-04T16:41:48.428079Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T16:41:48.428079Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"ekmVOWG+h6Q5TIHfm68oaa30t5cVdxFKOVaQKvP2x+aSr50DJ+/+hWtPkKgo6WcffA4FQih1sthLYFNm07T3Aw==","signature_status":"signed_v1","signed_at":"2026-07-04T16:41:48.428459Z","signed_message":"canonical_sha256_bytes"},"source_id":"nucl-ex/0302025","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:f982e0357f17ca4466b71399063ca00d752e164d937b4a5897b2169e350cb256","sha256:65d53462f190c9ce1d1672198917d455189143a89ee393f2ff7dd74609d234a7"],"state_sha256":"22170378ececd0b6259b0d05d1d66e0a28e643cef4d038310e660876c29992ac"}