{"id":36526,"date":"2026-06-08T13:16:27","date_gmt":"2026-06-08T13:16:27","guid":{"rendered":"https:\/\/lamarr-institute.org\/publication\/observation-of-the-charmless-purely-baryonic-decay-mathinnermathitlambda0_bto-mathitlambda-p-overlinep\/"},"modified":"2026-09-17T11:16:29","modified_gmt":"2026-09-17T11:16:29","slug":"observation-of-the-charmless-purely-baryonic-decay-mathinnermathitlambda0_bto-mathitlambda-p-overlinep","status":"publish","type":"publication","link":"https:\/\/lamarr-institute.org\/de\/publication\/observation-of-the-charmless-purely-baryonic-decay-mathinnermathitlambda0_bto-mathitlambda-p-overlinep\/","title":{"rendered":"Observation of the charmless purely baryonic decay $\\mathinner{\\mathit\\Lambda^0_b\\!\\to \\mathit\\Lambda p \\overline{p}}$"},"content":{"rendered":"<p>A search for the charmless purely baryonic decay $\\mathinner{\\mathit{\\Lambda}^0_b\\!\\to \\mathit{\\Lambda} p \\overline{p}}$ is performed using proton-proton collision data recorded by the LHCb experiment at a centre-of-mass energy of $\\sqrt{s}=13\\,\\text{TeV}$ and corresponding to an integrated luminosity of 6.0 $\\text{fb}^{-1}$. The signal decay is observed with a significance of 5.1 standard deviations. Its branching fraction is measured for the first time, relative to that of the topologically similar decay $\\mathinner{\\mathit{\\Lambda}^0_b\\!\\to \\mathit{\\Lambda} K^+ K^-}$. Contributions from intermediate charmonium resonances decaying to the $p \\overline{p}$ and $K^+ K^-$ final states are explicitly excluded with a requirement on the invariant mass of the companion hadron system, $m(h\\bar{h}) < 2.85\\,\\text{GeV}$, where h stands for a proton or a charged kaon. The relative branching fraction is found to be\n\n$\\frac{B(\\mathinner{\\mathit{\\Lambda}^0_b\\!\\to \\mathit{\\Lambda} p \\overline{p}})}{B(\\mathinner{\\mathit{\\Lambda}^0_b\\!\\to \\mathit{\\Lambda} K^+ K^-})} = (5.1 \\pm 1.3_{\\text{(stat)}} \\pm 0.3_{\\text{(syst)}}) \\times 10^{-2}$.\n<\/p>\n","protected":false},"excerpt":{"rendered":"<p>A search for the charmless purely baryonic decay $\\mathinner{\\mathit{\\Lambda}^0_b\\!\\to \\mathit{\\Lambda} p \\overline{p}}$ is performed using proton-proton collision data recorded by the LHCb experiment at a centre-of-mass energy of $\\sqrt{s}=13\\,\\text{TeV}$ and corresponding to an integrated luminosity of 6.0 $\\text{fb}^{-1}$. The signal decay is observed with a significance of 5.1 standard deviations. Its branching fraction is measured for the first time, relative to that of the topologically similar decay $\\mathinner{\\mathit{\\Lambda}^0_b\\!\\to \\mathit{\\Lambda} K^+ [&hellip;]<\/p>\n","protected":false},"author":14,"featured_media":0,"template":"","meta":{"_acf_changed":false,"footnotes":""},"publication-type":[30],"class_list":["post-36526","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\/36526","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\/14"}],"version-history":[{"count":0,"href":"https:\/\/lamarr-institute.org\/de\/wp-json\/wp\/v2\/publication\/36526\/revisions"}],"wp:attachment":[{"href":"https:\/\/lamarr-institute.org\/de\/wp-json\/wp\/v2\/media?parent=36526"}],"wp:term":[{"taxonomy":"publication-type","embeddable":true,"href":"https:\/\/lamarr-institute.org\/de\/wp-json\/wp\/v2\/publication-type?post=36526"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}