{"paper":{"title":"$\\Xi (1690)$ as a $\\bar{K} \\Sigma$ molecular state","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["hep-ex","hep-lat","nucl-ex","nucl-th"],"primary_cat":"hep-ph","authors_text":"Osaka U.), Takayasu Sekihara (RCNP","submitted_at":"2015-05-12T01:35:09Z","abstract_excerpt":"We show that a $\\Xi ^{\\ast}$ pole can be dynamically generated near the $\\bar{K} \\Sigma$ threshold as an $s$-wave $\\bar{K} \\Sigma$ molecular state in a coupled-channels unitary approach with the leading-order chiral interaction. This $\\Xi ^{\\ast}$ state can be identified with the $\\Xi (1690)$ resonance with $J^{P} = 1/2^{-}$. We find that the experimental $\\bar{K}^{0} \\Lambda$ and $K^{-} \\Sigma ^{+}$ mass spectra are qualitatively reproduced with the $\\Xi ^{\\ast}$ state. Moreover we theoretically investigate properties of the dynamically generated $\\Xi ^{\\ast}$ state."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1505.02849","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"}