{"paper":{"title":"Evidence for a narrow $D_{03}$ state in $K^- p \\rightarrow \\eta \\Lambda$ near threshold","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["nucl-th"],"primary_cat":"hep-ph","authors_text":"Bo-Chao Liu, Ju-Jun Xie","submitted_at":"2012-11-19T11:56:19Z","abstract_excerpt":"Recently, we reported a theoretical study on the $K^- p \\to \\eta \\Lambda$ reaction near threshold by using an effective Lagrangian approach. It was found that the description of angular distribution data measured by the Crystal Ball Collaboration needs a $D_{03}$ resonance with mass $M=1668.5\\pm 0.5$ MeV and total decay width $\\Gamma=1.5\\pm 0.5$ MeV, which is not the conventional $\\Lambda$(1690) or other $\\Lambda$ state listed in the Particle Data Group book. In the present work, we study the $\\Lambda$ polarization in the $K^- p \\to \\eta \\Lambda$ reaction within the same framework. The results"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1211.4375","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"}