{"paper":{"title":"The role of the triangle singularity in $\\Lambda(1405)$ production in the $\\pi^-p\\rightarrow K^0\\pi\\Sigma$ and $pp\\rightarrow pK^+\\pi\\Sigma$ processes","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"hep-ph","authors_text":"E. Oset, M. Bayar, R. Pavao, S. Sakai","submitted_at":"2017-10-11T08:43:33Z","abstract_excerpt":"We have investigated the cross section for the $\\pi^-p\\rightarrow K^0\\pi\\Sigma$ and $pp\\rightarrow pK^+\\pi\\Sigma$ reactions paying attention to a mechanism that develops a triangle singularity. The triangle diagram is realized by the decay of a $N^*$ to $K^*\\Sigma$ and the $K^*$ decay into $\\pi K$, and the $\\pi\\Sigma$ finally merges into $\\Lambda(1405)$. The mechanism is expected to produce a peak around $2140$ MeV in the $K\\Lambda(1405)$ invariant mass. We found that a clear peak appears around $2100$ MeV in the $K\\Lambda(1405)$ invariant mass which is about $40$ MeV lower than the expectatio"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1710.03964","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"}