{"paper":{"title":"Pentaquark spectrum in string dynamics","license":"","headline":"","cross_cats":[],"primary_cat":"hep-ph","authors_text":"A.I.Veselov, I.M.Narodetskii, M.A.Trusov, Yu.A.Simonov","submitted_at":"2003-10-09T17:05:07Z","abstract_excerpt":"The masses of $uudd\\bar s $ and $uudd\\bar d$ pentaquarks are evaluated in a framework of the Effective Hamiltonian approach to QCD using the Jaffe-Wilczek $[ud]^2\\bar q$ approximation. The mass of the $[ud]^2\\bar s$ state is found to be $\\sim 300-500$ MeV higher than the observed $\\Theta^+(1540)$ mass."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"hep-ph/0310118","kind":"arxiv","version":3},"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"}