{"id":32304,"date":"2026-01-21T17:01:41","date_gmt":"2026-01-21T17:01:41","guid":{"rendered":"https:\/\/lamarr-institute.org\/publication\/study-of-itlambda_itb0-and-itxi_itb0-decays-to-itlambda-hh-and-evidence-for-cp-violation-in-itlambda_itb0toitlambda-kk-decays\/"},"modified":"2026-06-08T13:19:35","modified_gmt":"2026-06-08T13:19:35","slug":"study-of-itlambda_itb0-and-itxi_itb0-decays-to-itlambda-hh-and-evidence-for-cp-violation-in-itlambda_itb0toitlambda-kk-decays","status":"publish","type":"publication","link":"https:\/\/lamarr-institute.org\/de\/publication\/study-of-itlambda_itb0-and-itxi_itb0-decays-to-itlambda-hh-and-evidence-for-cp-violation-in-itlambda_itb0toitlambda-kk-decays\/","title":{"rendered":"Study of $\\it\\Lambda_{\\it{b}}^{0}$ and $\\it\\Xi_{\\it{b}}^{0}$ decays to $\\it\\Lambda h^+h^{&#8218;-}$ and evidence for CP violation in $\\it\\Lambda_{\\it{b}}^{0}\\to\\it\\Lambda K^+K^-$ decays"},"content":{"rendered":"<p>A study of $\\it{\\Lambda}_{\\it{b}}^{0}$ and $\\it{\\Xi}_{\\it{b}}^{0}$ decays to $\\it{\\Lambda} h^{+} h^{\\prime -} (h^{(\\prime)}=\\pi, K)$ is performed using pp collision data collected by the LHCb experiment during LHC Runs 1-2, corresponding to an integrated luminosity of 9 ${fb}^{-1}$. The branching fractions for these decays are measured using the $\\it{\\Lambda}_{\\it{b}}^{0}\\to\\it{\\Lambda}_{\\it{c}}^+(\\to\\it{\\Lambda}\\pi^+)\\pi^-$ decay as control channel. The decays $\\it{\\Lambda}_{\\it{b}}^{0}\\to\\it{\\Lambda}\\pi^+\\pi^-$ and $\\it{\\Xi}_{\\it{b}}^{0}\\to\\it{\\Lambda}K^-\\pi^+$ are observed for the first time. For decay modes with sufficient signal yields, CP asymmetries are measured in the full and localized regions of the final-state phase space. Evidence is found for CP violation in the $\\it{\\Lambda}_{\\it{b}}^{0}\\to\\it{\\Lambda}K^+K^-$ decay, interpreted as originating primarily from an asymmetric $\\it{\\Lambda}_{\\it{b}}^{0} \\to \\it{N}^{*+} \\it{K}^-$ decay amplitude. The measured CP asymmetries for the other decays are compatible with zero.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>A study of $\\it{\\Lambda}_{\\it{b}}^{0}$ and $\\it{\\Xi}_{\\it{b}}^{0}$ decays to $\\it{\\Lambda} h^{+} h^{\\prime -} (h^{(\\prime)}=\\pi, K)$ is performed using pp collision data collected by the LHCb experiment during LHC Runs 1-2, corresponding to an integrated luminosity of 9 ${fb}^{-1}$. The branching fractions for these decays are measured using the $\\it{\\Lambda}_{\\it{b}}^{0}\\to\\it{\\Lambda}_{\\it{c}}^+(\\to\\it{\\Lambda}\\pi^+)\\pi^-$ decay as control channel. The decays $\\it{\\Lambda}_{\\it{b}}^{0}\\to\\it{\\Lambda}\\pi^+\\pi^-$ and $\\it{\\Xi}_{\\it{b}}^{0}\\to\\it{\\Lambda}K^-\\pi^+$ are observed for the first time. For decay modes with sufficient signal yields, [&hellip;]<\/p>\n","protected":false},"author":12,"featured_media":0,"template":"","meta":{"_acf_changed":false,"footnotes":""},"publication-type":[30],"class_list":["post-32304","publication","type-publication","status-publish","hentry","publication-type-article"],"acf":[],"publishpress_future_workflow_manual_trigger":{"enabledWorkflows":[]},"_links":{"self":[{"href":"https:\/\/lamarr-institute.org\/de\/wp-json\/wp\/v2\/publication\/32304","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/lamarr-institute.org\/de\/wp-json\/wp\/v2\/publication"}],"about":[{"href":"https:\/\/lamarr-institute.org\/de\/wp-json\/wp\/v2\/types\/publication"}],"author":[{"embeddable":true,"href":"https:\/\/lamarr-institute.org\/de\/wp-json\/wp\/v2\/users\/12"}],"version-history":[{"count":0,"href":"https:\/\/lamarr-institute.org\/de\/wp-json\/wp\/v2\/publication\/32304\/revisions"}],"wp:attachment":[{"href":"https:\/\/lamarr-institute.org\/de\/wp-json\/wp\/v2\/media?parent=32304"}],"wp:term":[{"taxonomy":"publication-type","embeddable":true,"href":"https:\/\/lamarr-institute.org\/de\/wp-json\/wp\/v2\/publication-type?post=32304"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}