?-Rays Emitted from the Polarized Nuclei and ?-Decay Interactions on the Strong Meson-Dominance Model

Abstract

As a natural extension of the original Yukawa theory of β-decay, the strong meson-dominance model is presented, in which all strong mesons can in general contribute to β-decay. By assuming that the weak interactions between mesons and leptons are exclusively V-A type, general expressions of the beta-decay interactions are deduced, which agree exactly with those given by Weinberg. Here the main contributions come out from the intermediary acts of mesons, π(140 MeV), ρ(760 MeV), δ(960 MeV), π_N(1016 MeV), A₁(1070 MeV) and B(1220 MeV). The theoretical formulas for the β-ray spectra emitted from the polarized nuclei are given, among which the contributions from the pseudo-tensor interaction (the second class interaction) coming from the B-meson channel are noticeable, besides those from the tensor interaction (the first-class interaction) coming from the ρ-meson channel.