Measurement of the Branching Ratio and Form Factors for the Decay \boldmath $K_L\toπ^{\pm}π^0e^{\mp}ν_e(\barν_e)

NA48 Collaboration, J. R. Batley

The $K_L\to {\pi }^{\pm }{\pi }^0{e}^{\mp }{\nu }_e({\bar{\nu }}_e)$ decay was investigated with the NA48 detector at CERN SPS using a beam of long-lived neutral kaons. The branching ratio $Br(K_L\toπ^{\pm}π…