Test of theΔS=ΔQRule in Leptonic Decay of NeutralKMesons

Abstract
The time distribution of 335 leptonic decays of K0's produced by K++dK0+p+p has been analyzed. The likelihood estimate for xeiϕ, the ratio between the ΔS=ΔQ violating and nonviolating amplitudes, yields x=0.260.11+0.08 and a phase ϕ=50°27°+25°.