{"paper":{"title":"Meson-baryon couplings and the $F/D$ ratio from QCD sum rules","license":"","headline":"","cross_cats":["hep-ph"],"primary_cat":"nucl-th","authors_text":"(2) Yonsei Univ.), Hungchong Kim (1), Makoto Oka (1), Su Houng Lee (2)-((1)Tokyo Institute of Technology, Takumi Doi (1)","submitted_at":"1999-09-07T05:27:47Z","abstract_excerpt":"Motivated by the recent work on the calculation of the $\\pi NN$ coupling constant using QCD sum rule beyond the chiral limit, we construct the corresponding sum rules for the couplings, $\\eta NN$, $\\pi \\Xi\\Xi$, $\\eta \\Xi\\Xi$, $\\pi \\Sigma \\Sigma$ and $\\eta \\Sigma \\Sigma$. In constructing the $\\eta$-baryon sum rules, we use the second moment of the $\\eta$ wave function, which we obtain from the pion wave function after SU(3) rotation. In the SU(3) symmetric limit, we can identify the term responsible for the $F/D$ ratio in the OPE, which after the sum rule analysis gives $F/D\\sim 0.2$, a factor "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"nucl-th/9909007","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"}