{"id":35113,"date":"2026-04-13T14:10:10","date_gmt":"2026-04-13T14:10:10","guid":{"rendered":"https:\/\/lamarr-institute.org\/publication\/search-for-k_mathrmsl0-rightarrow-pipi-muu-decays-at-lhcb\/"},"modified":"2026-09-17T11:18:52","modified_gmt":"2026-09-17T11:18:52","slug":"search-for-k_mathrmsl0-rightarrow-pipi-muu-decays-at-lhcb","status":"publish","type":"publication","link":"https:\/\/lamarr-institute.org\/de\/publication\/search-for-k_mathrmsl0-rightarrow-pipi-muu-decays-at-lhcb\/","title":{"rendered":"Search for $K_{\\mathrm{S(L)}}^{0} \\rightarrow \\pi^{+}\\pi^{-}\\mu^{+}\\,u^{-}$ decays at LHCb"},"content":{"rendered":"<p>A search for $K_{\\mathrm{S(L)}}^{0} \\rightarrow \\pi^{+}\\pi^{-}\\mu^{+}\\mu^{-}$ decays is performed using proton-proton collision data collected by the LHCb experiment at a centre-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 5.4 $\\mathrm{fb^{-1}}. No K_{\\mathrm{S(L)}}^{0} \\rightarrow \\pi^{+}\\pi^{-}\\mu^{+}\\mu^{-}$ signals are found and upper limits are set for the first time on the branching fractions $\\mathcal{B}(K_\\text{S}^{0} \\rightarrow \\pi^{+}\\pi^{-}\\mu^{+}\\mu^{-}) < 1.4 \\times 10^{-9}$ and $\\mathcal{B}(K_\\text{L}^{0} \\rightarrow \\pi^{+}\\pi^{-}\\mu^{+}\\mu^{-}) < 6.6 \\times 10^{-7}$, at the 90\\% confidence level.\n<\/p>\n","protected":false},"excerpt":{"rendered":"<p>A search for $K_{\\mathrm{S(L)}}^{0} \\rightarrow \\pi^{+}\\pi^{-}\\mu^{+}\\mu^{-}$ decays is performed using proton-proton collision data collected by the LHCb experiment at a centre-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 5.4 $\\mathrm{fb^{-1}}. No K_{\\mathrm{S(L)}}^{0} \\rightarrow \\pi^{+}\\pi^{-}\\mu^{+}\\mu^{-}$ signals are found and upper limits are set for the first time on the branching fractions $\\mathcal{B}(K_\\text{S}^{0} \\rightarrow \\pi^{+}\\pi^{-}\\mu^{+}\\mu^{-}) < 1.4 \\times 10^{-9}$ and $\\mathcal{B}(K_\\text{L}^{0} \\rightarrow \\pi^{+}\\pi^{-}\\mu^{+}\\mu^{-}) < 6.6 \\times 10^{-7}$, at the [&hellip;]\n<\/p>\n","protected":false},"author":14,"featured_media":0,"template":"","meta":{"_acf_changed":false,"footnotes":""},"publication-type":[30],"class_list":["post-35113","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\/35113","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\/35113\/revisions"}],"wp:attachment":[{"href":"https:\/\/lamarr-institute.org\/de\/wp-json\/wp\/v2\/media?parent=35113"}],"wp:term":[{"taxonomy":"publication-type","embeddable":true,"href":"https:\/\/lamarr-institute.org\/de\/wp-json\/wp\/v2\/publication-type?post=35113"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}