{"paper":{"title":"Study of $ Theta^+(udud \\bar s) $ in lattice QCD with exact chiral symmetry","license":"","headline":"","cross_cats":["hep-lat","nucl-th"],"primary_cat":"hep-ph","authors_text":"Ting-Wai Chiu, Tung-Han Hsieh","submitted_at":"2004-03-02T16:58:56Z","abstract_excerpt":"We investigate the mass spectrum of the pentaquark baryon ($ udud \\bar s $) in quenched lattice QCD with exact chiral symmetry. Using 3 different interpolating operators for $ \\Theta $, we measure the $ 3 \\times 3 $ correlation matrix and obtain the eigenvalues $ A^{\\pm} (t) $ with $ \\pm $ parity, for 100 gauge configurations generated with Wilson gauge action at $ \\beta = 6.1 $ on the $ 20^3 \\times 40 $ lattice. For the lowest-lying $ J^P = 1/2^- $ state, its mass is almost identical to that of the KN S-wave, while for the lowest-lying $ J^P = 1/2^+ $ state, its mass is smaller than that of t"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"hep-ph/0403020","kind":"arxiv","version":5},"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"}