{"paper":{"title":"How to reveal the exotic nature of the P_c(4450)","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["hep-ex","hep-lat","nucl-th"],"primary_cat":"hep-ph","authors_text":"Feng-Kun Guo, Ulf-G. Mei{\\ss}ner, Wei Wang, Zhi Yang","submitted_at":"2015-07-17T12:37:37Z","abstract_excerpt":"The LHCb Collaboration announced two pentaquark-like structures in the $J/\\psi p$ invariant mass distribution. We show that the current information on the narrow structure at 4.45 GeV is compatible with kinematical effects of the rescattering from $\\chi_{c1} p$ to $J/\\psi p$: First, it is located exactly at the $\\chi_{c1} p$ threshold. Second, the mass of the four-star well-established $\\Lambda(1890)$ is such that a leading Landau singularity from a triangle diagram can coincidentally appear at the $\\chi_{c1} p$ threshold, and third, there is a narrow structure at the $\\chi_{c1}\\,p$ threshold "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1507.04950","kind":"arxiv","version":2},"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"}