{"paper":{"title":"Threshold Behaviour of Meson-Nucleon-$S_{11}$(1535) Vertexfunctions and Determination of the $S_{11}$(1535) Mixing Angle","license":"","headline":"","cross_cats":[],"primary_cat":"nucl-th","authors_text":"F. Kleefeld","submitted_at":"1999-10-04T18:21:22Z","abstract_excerpt":"A new method for the determination of the spin-1/2-3/2-mixing angle and the range parameter of the quarkmodel wavefunction of the resonance $S^-_{11}(1535)$ is presented. The method ist based on a quantitative calculation of the total cross section of $pp\\to pp\\eta$ at threshold. The quantitative on-shell treatment of ISI and FSI is discussed."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"nucl-th/9910010","kind":"arxiv","version":2},"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"}