1.
Phys Rev Lett
; 127(13): 131802, 2021 Sep 24.
Artículo
en Inglés
| MEDLINE
| ID: mdl-34623867
RESUMEN
Searches for the lepton number violating K^{+}âπ^{-}µ^{+}e^{+} decay and the lepton flavor violating K^{+}âπ^{+}µ^{-}e^{+} and π^{0}âµ^{-}e^{+} decays are reported using data collected by the NA62 experiment at CERN in 2017-2018. No evidence for these decays is found and upper limits of the branching ratios are obtained at 90% confidence level: B(K^{+}âπ^{-}µ^{+}e^{+})<4.2×10^{-11}, B(K^{+}âπ^{+}µ^{-}e^{+})<6.6×10^{-11} and B(π^{0}âµ^{-}e^{+})<3.2×10^{-10}. These results improve by 1 order of magnitude over previous results for these decay modes.
2.
Phys Rev D Part Fields
; 33(5): 1486-1487, 1986 Mar 01.
Artículo
en Inglés
| MEDLINE
| ID: mdl-9956786