Space Properties of theπMeson

Abstract

Measurements have been made of the circular polarization of the decay photons emitted from an "unpolarized" sample of ${\pi }^0$ mesons, the asymmetric emission of ${\mu }^{+}$ mesons from cyclotron-produced ${\pi }^{+}$ mesons, and the asymmetric emission of ${\mu }^{+}$ mesons from ${\pi }^{+}$ mesons produced in weak interactions. All three experiments give negative results.