{"paper":{"title":"Interpretation of the Narrow $J/\\psi p$ Peaks in $\\Lambda_b \\to J/\\psi p K^-$ Decay in the Compact Diquark Model","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["hep-ex"],"primary_cat":"hep-ph","authors_text":"Ahmed Ali, Alexander Ya. Parkhomenko","submitted_at":"2019-03-31T16:58:04Z","abstract_excerpt":"Recently, the LHCb Collaboration have updated their analysis of the resonant $J/\\psi p$ mass spectrum in the decay $\\Lambda_b^0 \\to J/\\psi p K^-$. In the combined Run~1 and Run~2 LHCb data, three peaks are observed, with the former $P_c(4450)^+$ state split into two narrow states, $P_c(4440)^+$ and $P_c(4457)^+$, having the masses $M=(4440.3\\pm 1.3^{+4.1}_{-4.7})$ MeV and $M=(4457.3\\pm 0.6^{+4.1}_{-1.7})$ MeV, and decay widths $\\Gamma=(20.6\\pm 4.9^{+8.7}_{-10.1})$ MeV and $\\Gamma=(6.4\\pm 2.0^{+5.7}_{-1.9})$ MeV, respectively. In addition, a third narrow peak, $P_c(4312)^+$, having the mass $M="},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1904.00446","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"}