Momentum and Asymmetry Spectrum ofμ-Meson Decay

Abstract

The beta decay of the positive $\ensuremath{\mu}$ meson was studied using a liquid hydrogen bubble chamber in a magnetic field of 8800 gauss. An analysis of 9213 events used in the momentum spectrum yielded $\ensuremath{\rho}=0.780\ifmmode\pm\else\textpm\fi{}0.025$. This number includes the internal radiative corrections and is to be compared directly with the 0.75 predicted by two component theory. The analysis of 8354 events used in the asymmetry spectrum gave for the magnitude of the asymmetry $|\ensuremath{\xi}|=0.94\ifmmode\pm\else\textpm\fi{}0.07$ and for the shape parameter $\ensuremath{\delta}=0.78\ifmmode\pm\else\textpm\fi{}0.05$.