Search for LNV/LFV K decays at the NA62 experiment at CERN Conference Paper

New results are presented for the first time of searches for lepton number violating (LNV) decays K → π−e e and K → π−μ μ from the NA62 experiment at CERN using a subset of 2017 data. No LNV signals are observed and upper limits are set on the branching ratios, B(K → π−e e ) < 2.2 × 10−10 and B(K → π−μ μ ) < 4.2 × 10−11, at 90%25 confidence level. © 2019 CERN for the benefit of the ATLAS and CMS Collaborations. CC-BY-4.0 license.
New results are presented for the first time of searches for lepton number violating (LNV) decays K%2b → π−e%2be%2b and K%2b → π−μ%2bμ%2b from the NA62 experiment at CERN using a subset of 2017 data. No LNV signals are observed and upper limits are set on the branching ratios, B(K%2b → π−e%2be%2b) < 2.2 × 10−10 and B(K%2b → π−μ%2bμ%2b) < 4.2 × 10−11, at 90%25 confidence level. © 2019 CERN for the benefit of the ATLAS and CMS Collaborations. CC-BY-4.0 license.

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