First Observation and Study of the $K^{\pm }\to {\pi }^{\pm }{\pi }^0{e}^{+}{e}^{-}$ Decay

2 Collaboration

The NA48/2 experiment at CERN reports the first observation of the $K^{\pm }\to {\pi }^{\pm }{\pi }^0{e}^{+}{e}^{-}$ decay from an exposure of $1.7\times 10^{11}$ charged kaon decays recorded in $200…