{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:GOTJ4RZ7FW26A373X77YLHWKER","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":"4f077eb03acb3ba67e152d77a698dfb6b2cce4d900af4550c8db57c0acad7daf","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-th","submitted_at":"2016-02-23T22:08:33Z","title_canon_sha256":"632264c4c634d15408ac01450ca67c1fbf66b32bc61857cf229b50b5bb59b9a4"},"schema_version":"1.0","source":{"id":"1602.07333","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1602.07333","created_at":"2026-05-18T01:12:04Z"},{"alias_kind":"arxiv_version","alias_value":"1602.07333v1","created_at":"2026-05-18T01:12:04Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1602.07333","created_at":"2026-05-18T01:12:04Z"},{"alias_kind":"pith_short_12","alias_value":"GOTJ4RZ7FW26","created_at":"2026-05-18T12:30:19Z"},{"alias_kind":"pith_short_16","alias_value":"GOTJ4RZ7FW26A373","created_at":"2026-05-18T12:30:19Z"},{"alias_kind":"pith_short_8","alias_value":"GOTJ4RZ7","created_at":"2026-05-18T12:30:19Z"}],"graph_snapshots":[{"event_id":"sha256:4d4e8f1b746a7ac500e2a0a550a6910da4364b2cade6a21e833715f42cd8c6d8","target":"graph","created_at":"2026-05-18T01:12:04Z","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":"The reaction $NN \\to NN \\pi$ offers a good testing ground for chiral effective field theory at intermediate energies. It challenges our understanding of the first inelastic channel in nucleon-nucleon scattering and of the charge-symmetry breaking pattern in hadronic reactions. In our previous studies, we presented a complete calculation of the pion-production operator for s-wave pions up-to-and-including next-to-next-to-leading order (NNLO) in the formulation of chiral effective field theory, which includes pions, nucleons and $\\Delta(1232)$ degrees of freedom. In this paper we calculate the n","authors_text":"A. A. Filin, C. Hanhart, E. Epelbaum, F. Myhrer, H. Krebs, V. Baru","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-th","submitted_at":"2016-02-23T22:08:33Z","title":"Threshold pion production in proton-proton collisions at NNLO in chiral EFT"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1602.07333","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":"sha256:889613597b5567660e6ad5e8a59c394a8201df7be2f2e64af84c6d9ce6509f61","target":"record","created_at":"2026-05-18T01:12:04Z","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":"4f077eb03acb3ba67e152d77a698dfb6b2cce4d900af4550c8db57c0acad7daf","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-th","submitted_at":"2016-02-23T22:08:33Z","title_canon_sha256":"632264c4c634d15408ac01450ca67c1fbf66b32bc61857cf229b50b5bb59b9a4"},"schema_version":"1.0","source":{"id":"1602.07333","kind":"arxiv","version":1}},"canonical_sha256":"33a69e473f2db5e06ffbbfff859eca247e08f620210be84621cb571d086d33d4","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"33a69e473f2db5e06ffbbfff859eca247e08f620210be84621cb571d086d33d4","first_computed_at":"2026-05-18T01:12:04.574486Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:12:04.574486Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"XtWqFIzDxZ3vlTx44Wh2GnKMtNhIF7iVtVjbPuR+SSqjf6/T4A3+9fcmPAWCmlowS0pqJVaj4eSJ3qFN7LRpCw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:12:04.574817Z","signed_message":"canonical_sha256_bytes"},"source_id":"1602.07333","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:889613597b5567660e6ad5e8a59c394a8201df7be2f2e64af84c6d9ce6509f61","sha256:4d4e8f1b746a7ac500e2a0a550a6910da4364b2cade6a21e833715f42cd8c6d8"],"state_sha256":"1e72ec9cac8d9d00fb7f349fbdb7c14c817fa82b285eda84a973faf99ba774a2"}