{"id":35136,"date":"2026-04-13T14:10:33","date_gmt":"2026-04-13T14:10:33","guid":{"rendered":"https:\/\/lamarr-institute.org\/publication\/first-observation-of-the-overlineb_s0tolambda_coverlinelambda_c-decay-and-evidence-for-the-overlineb0tolambda_coverlinelambda_c-decay\/"},"modified":"2026-06-08T13:17:45","modified_gmt":"2026-06-08T13:17:45","slug":"first-observation-of-the-overlineb_s0tolambda_coverlinelambda_c-decay-and-evidence-for-the-overlineb0tolambda_coverlinelambda_c-decay","status":"publish","type":"publication","link":"https:\/\/lamarr-institute.org\/de\/publication\/first-observation-of-the-overlineb_s0tolambda_coverlinelambda_c-decay-and-evidence-for-the-overlineb0tolambda_coverlinelambda_c-decay\/","title":{"rendered":"First observation of the $\\overline{B}_{s}^{0}\\to\\Lambda_{c}^{+}\\overline\\Lambda_{c}{}^{-}$ decay and evidence for the $\\overline{B}^{0}\\to\\Lambda_{c}^{+}\\overline\\Lambda_{c}{}^{-}$ decay"},"content":{"rendered":"<p>A search is presented for the two-body charmed baryonic decays $\\overline{B}_{(s)}^{0}\\to\\Lambda_{c}^{+}\\overline{\\Lambda}_{c}{}^{-}$, using a data sample collected by the LHCb experiment during 2011-2012 and 2015-2018 corresponding to an integrated luminosity of 9 fb $^{-1}$. The first observation of the $\\overline{B}_{s}^{0}\\to\\Lambda_{c}^{+}\\overline{\\Lambda}_{c}{}^{-}$ decay is reported with 6.2 $\\sigma$ significance, along with 4.3 $\\sigma$ evidence for the $\\overline{B}^{0}\\to\\Lambda_{c}^{+}\\overline{\\Lambda}_{c}{}^{-}$ decay. The branching fractions are measured to be $B{}(\\overline{B}^{0}\\to\\Lambda_{c}^{+}\\overline{\\Lambda}_{c}{}^{-}) = (1.01^{+0.27}_{-0.28} \\pm 0.08 \\pm 0.15) \\times 10^{-5}$ and $B{}(\\overline{B}_{s}^{0}\\to\\Lambda_{c}^{+}\\overline{\\Lambda}_{c}{}^{-}) = (5.0 \\pm 1.3 \\pm 0.5 \\pm 0.8) \\times 10^{-5}$, where the first uncertainty is statistical, the second systematic, and the third due to external inputs. These results provide novel experimental inputs for the theoretical framework describing two-body baryonic decays of B mesons via W-emission and W-exchange mechanisms.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>A search is presented for the two-body charmed baryonic decays $\\overline{B}_{(s)}^{0}\\to\\Lambda_{c}^{+}\\overline{\\Lambda}_{c}{}^{-}$, using a data sample collected by the LHCb experiment during 2011-2012 and 2015-2018 corresponding to an integrated luminosity of 9 fb $^{-1}$. The first observation of the $\\overline{B}_{s}^{0}\\to\\Lambda_{c}^{+}\\overline{\\Lambda}_{c}{}^{-}$ decay is reported with 6.2 $\\sigma$ significance, along with 4.3 $\\sigma$ evidence for the $\\overline{B}^{0}\\to\\Lambda_{c}^{+}\\overline{\\Lambda}_{c}{}^{-}$ decay. The branching fractions are measured to be $B{}(\\overline{B}^{0}\\to\\Lambda_{c}^{+}\\overline{\\Lambda}_{c}{}^{-}) = (1.01^{+0.27}_{-0.28} \\pm 0.08 \\pm 0.15) \\times [&hellip;]<\/p>\n","protected":false},"author":12,"featured_media":0,"template":"","meta":{"_acf_changed":false,"footnotes":""},"publication-type":[30],"class_list":["post-35136","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\/35136","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\/35136\/revisions"}],"wp:attachment":[{"href":"https:\/\/lamarr-institute.org\/de\/wp-json\/wp\/v2\/media?parent=35136"}],"wp:term":[{"taxonomy":"publication-type","embeddable":true,"href":"https:\/\/lamarr-institute.org\/de\/wp-json\/wp\/v2\/publication-type?post=35136"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}