Abstract
Publisher Summary This chapter focuses on parity nonconservation in weak interactions. It describes the theoretical arguments advanced by Lee and Yang, concerning the situation of parity nonconservation in the weak interactions. It summarizes the essential features of the two-component theory of the neutrino. The chapter presents a discussion on various methods which have been employed to demonstrate the longitudinal polarization of the electrons and positrons from β-decay. The experiments based on the circular polarization of the bremsstrahlung emitted by the polarized electrons are discussed. A review is presented of the investigations using the Moller scattering of the β-decay electrons on polarized ferromagnetic electrons of iron in a magnetic field. Experiments using the asymmetry of the Mott scattering of the β-rays on nuclei are analyzed. The chapter also reviews various experiments to determine the longitudinal polarization of positrons from β-decay, which are based on the annihilation properties of polarized positrons.
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