{"paper":{"title":"Theoretical description of the decays $\\Lambda_b \\to \\Lambda^{(\\ast)}(\\frac12^\\pm,\\frac32^\\pm) + J/\\psi$","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["hep-ex"],"primary_cat":"hep-ph","authors_text":"J\\\"urgen G. K\\\"orner, Mikhail A. Ivanov, Pietro Santorelli, Thomas Gutsche, Valery E. Lyubovitskij, Vladimir V. Lyubushkin","submitted_at":"2017-05-20T13:02:57Z","abstract_excerpt":"We calculate the invariant and helicity amplitudes for the transitions $\\Lambda_b~\\to~\\Lambda^{(\\ast)}(J^P)~+~J/\\psi$ where the $\\Lambda^{(\\ast)}(J^P)$ are $\\Lambda(sud)$-type ground and excited states with $J^P$ quantum numbers $J^P=\\frac12^{\\pm},\\frac32^{\\pm}$. The calculations are performed in the framework of a covariant confined quark model previously developed by us. We find that the values of the helicity amplitudes for the $\\Lambda^\\ast(1520,\\,\\frac32^-)$ and the $\\Lambda^\\ast(1890,\\,\\frac32^+)$ are suppressed compared with those for the ground state $\\Lambda(1116,\\,\\frac12^+)$ and the"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1705.07299","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"}