Measurement of the charge asymmetry in the decayKL0→π±μ∓ν

Abstract

The charge asymmetry in the decay $K_L^0\to {\pi }^{\pm }{\mu }^{\mp }\nu$ has been measured to be (2.78 ± 0.51) × ${10}^{-3\mathrm{}}$, leading to a value of $\mathrm{Re}\epsilon$ in good agreement with the results from the $K_L^0\to 2\pi$ decay modes.