{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2010:MWR4AX6UYEUFO355IW7A7JIGN2","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":"d7f67fff53408b6af2950443cc4eaccc639d8b330fb85570e7204134970c7486","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-th","submitted_at":"2010-03-19T16:08:28Z","title_canon_sha256":"6daf17f74aaf3b233a88c5441ff68ddd691c39307231cc72e751a7e98d360a7e"},"schema_version":"1.0","source":{"id":"1003.3826","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1003.3826","created_at":"2026-05-18T02:08:25Z"},{"alias_kind":"arxiv_version","alias_value":"1003.3826v1","created_at":"2026-05-18T02:08:25Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1003.3826","created_at":"2026-05-18T02:08:25Z"},{"alias_kind":"pith_short_12","alias_value":"MWR4AX6UYEUF","created_at":"2026-05-18T12:26:10Z"},{"alias_kind":"pith_short_16","alias_value":"MWR4AX6UYEUFO355","created_at":"2026-05-18T12:26:10Z"},{"alias_kind":"pith_short_8","alias_value":"MWR4AX6U","created_at":"2026-05-18T12:26:10Z"}],"graph_snapshots":[{"event_id":"sha256:a509f7412d1f4e2ed5066ca001a41ae4004164c6bca33fa7ba777cf40a585918","target":"graph","created_at":"2026-05-18T02:08:25Z","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":"We calculate the leading isospin conserving few-nucleon contributions to pion scattering on $^2$H, $^3$He, and $^4$He. We demonstrate that the strong contributions to the pion-nucleus scattering lengths can be controlled theoretically to an accuracy of a few percent for isoscalar nuclei and of 10% for isovector nuclei. In particular, we find the $\\pi$-$^3$He scattering length to be $(62 \\pm 4\\pm 7)\\times 10^{-3} m_{\\pi}^{-1}$ where the uncertainties are due to ambiguities in the $\\pi$-N scattering lengths and few-nucleon effects, respectively. To establish this accuracy we need to identify a s","authors_text":"A. Nogga, C. Hanhart, F. Ballout, S. Liebig, V. Baru","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-th","submitted_at":"2010-03-19T16:08:28Z","title":"Towards a high precision calculation for the pion-nucleus scattering lengths"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1003.3826","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:c53adbcb62651545c7da150452aa30fa4e13c0f341d191f6c30319e6233e3162","target":"record","created_at":"2026-05-18T02:08:25Z","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":"d7f67fff53408b6af2950443cc4eaccc639d8b330fb85570e7204134970c7486","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-th","submitted_at":"2010-03-19T16:08:28Z","title_canon_sha256":"6daf17f74aaf3b233a88c5441ff68ddd691c39307231cc72e751a7e98d360a7e"},"schema_version":"1.0","source":{"id":"1003.3826","kind":"arxiv","version":1}},"canonical_sha256":"65a3c05fd4c128576fbd45be0fa5066eb4819c44d360fda38ecff311b386d0e1","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"65a3c05fd4c128576fbd45be0fa5066eb4819c44d360fda38ecff311b386d0e1","first_computed_at":"2026-05-18T02:08:25.266265Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:08:25.266265Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"L818PUYERJUqUf2wM2m8BfOo/VeSa3oUATbcD+OlyMjeEyijLd7wJZkn+bZ5wDBMmoGIL3c2fyhBUR2kKfTFAw==","signature_status":"signed_v1","signed_at":"2026-05-18T02:08:25.267048Z","signed_message":"canonical_sha256_bytes"},"source_id":"1003.3826","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:c53adbcb62651545c7da150452aa30fa4e13c0f341d191f6c30319e6233e3162","sha256:a509f7412d1f4e2ed5066ca001a41ae4004164c6bca33fa7ba777cf40a585918"],"state_sha256":"2427a82e98de77eb3d6ae2a60e87e2b0493c4a150b6cfc4c09c348d78bd7d9df"}