Muon Polarization in the DecayKL0→π−μ+νμ, an Experimental Test of Time-Reversal Invariance

Abstract

We report the results of a high-statistics scintillation-counter electronics experiment measuring the muon polarization in the decay ${K_L}^0\to {\pi }^{-}{\mu }^{+}{\nu }_{\mu }$ by the method of spin precession. We present results for the real and the imaginary parts of the form-factor ratio.