{"paper":{"title":"$\\pi-N$ from an Extended Effective Field Theory","license":"","headline":"","cross_cats":[],"primary_cat":"nucl-th","authors_text":"P.J. Ellis (University of Minnesota)","submitted_at":"2000-08-30T19:12:03Z","abstract_excerpt":"Third order chiral perturbation theory accounts for the $\\pi-N$ scattering phase shift data out to energies slightly below the position of the $\\Delta$ resonance. The low energy constants are not accurately determined. Explicit inclusion of the $\\Delta$ field is favored."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"nucl-th/0008063","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"}