{"paper":{"title":"$\\Lambda(1405)$ mediated triangle singularity in the $K^-d\\to p\\Sigma^-$ reaction","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"nucl-th","authors_text":"Albert Feijoo, Eulogio Oset, Lian Rong Dai, Raquel Molina","submitted_at":"2021-05-20T10:40:24Z","abstract_excerpt":"We study for the first time the $p\\Sigma^-\\to K^-d$ and $K^-d\\to p\\Sigma^-$ reactions close to threshold and show that they are driven by a triangle mechanism, with the $\\Lambda(1405)$, a proton and a neutron as intermediate states, which develops a triangle singularity close to the $\\bar{K}d$ threshold. We find that a mechanism involving virtual pion exchange and the $K^-p\\to\\pi^+\\Sigma^-$ amplitude dominates over another one involving kaon exchange and the $K^-p\\to K^-p$ amplitude. Moreover, of the two $\\Lambda(1405)$ states, the one with higher mass around $1420$ MeV, gives the largest cont"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2105.09654","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2105.09654/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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"}