Search for Heavy Neutrinos in $\pi \to \mu \nu$ Decay

A. Aguilar-Arevalo, M. Aoki, M. Blecher +21

Heavy neutrinos were sought in pion decays ${\pi }^{+}\to {\mu }^{+}\nu$ by examining the observed muon energy spectrum for extra peaks in addition to the expected peak for a massless ne…