{"paper":{"title":"$\\pi N \\sigma$ Term , $\\bar{s}s$ in Nucleon, and Scalar Form Factor --- a Lattice Study","license":"","headline":"","cross_cats":["hep-lat","nucl-th"],"primary_cat":"hep-ph","authors_text":"J.-F. Laga\\\"e, K.F. Liu, S.J. Dong","submitted_at":"1996-02-08T20:30:12Z","abstract_excerpt":"We report on a lattice QCD calculation of the $\\pi N \\sigma$ term, the scalar form factor, and $\\langle N|\\bar{s}s|N\\rangle$. The disconnected insertion part of $\\sg$ is found to be $1.8 \\pm 0.1$ times larger than the connected insertion contribution. The $q^2$ dependence of $\\sg(q^2)$ is about the same as $G_E(q^2)$ of the proton so that $\\sg(2m_{\\pi}^2) - \\sg(0) = 6.6 \\pm 0.6$ MeV. The ratio $y= \\ss/\\ud = 0.36 \\pm 0.03$. Both results favor a $\\sg \\sim 53$ MeV, slightly larger than our direct calculation of $\\sg = 49.7 \\pm 2.6$ MeV. We also compute $F_s$ and $D_s$ and find that the agreement "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"hep-ph/9602259","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"}