{"paper":{"title":"Direct CP violation in $\\Lambda_b$ decays","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["hep-ex"],"primary_cat":"hep-ph","authors_text":"C.Q. Geng, Y.K. Hsiao","submitted_at":"2014-12-05T05:49:27Z","abstract_excerpt":"We study direct CP violating asymmetries (CPAs) in the two-body $\\Lambda_b$ decays of $\\Lambda_b\\to pM(V)$ with $M(V)=K^-(K^{*-})$ and $\\pi^-(\\rho^-)$ based on the generalized factorization method. After simultaneously explaining the observed decay branching ratios of $\\Lambda_b\\to (p K^-\\,,\\; p \\pi^-)$ with ${\\cal R}_{\\pi K}\\equiv {\\cal B}(\\Lambda_b\\to p \\pi^-)/{\\cal B}(\\Lambda_b\\to p K^-)$ being $0.84\\pm 0.09$, we find that their corresponding direct CPAs are $(5.8\\pm 0.2,\\,-3.9\\pm 0.2)\\%$ in the standard model (SM), in comparison with $(-5^{+26}_{-~5},\\, -31^{+43}_{-~1})\\%$ and $(-10\\pm8\\pm"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1412.1899","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"}