In October 1934, at a meeting of the Osaka Branch of the PhysicoMathematical Society of Japan, Hideki Yukawa proposed a new theory of nuclear forces involving the exchange between neutron and proton of an electrically charged “heavy quantum”.l Yukawa’s theory is known today as the meson theory of nuclear forces and his “heavy quantum” is called the meson.2 The theory provided a fundamental expl...

In this research we described the effective Hamiltonian theory and applied this theory to the calculation of current-current (Q1,2) and QCD penguin (Q3,…,6) c quark decay rates. We calculated the decay rates of semileptonic and hadronic of charm quark in the effective Hamiltonian theory. We investigated the decay rates of D meson decays according to Spectator Quark Model (SQM) for the calculati...

We have been studying -decay properties of nuclei far from the -stability line with the use of the 2nd generation of the gross theory and semi-gross theory. In the 2nd generation of the gross theory, the shell effects of nuclei are included only through the -decay Q-values. On the other hand, in the case of the semi-gross theory, other various shell effects of the parent nucleus are taken into ...

In this paper, proton decay in a large nucleus is studied in the framework of SU{5) grand unification theory (GUT). By using a method based upon the Green s-function technique of many-body physics, nuclear effects on spectator and pole terms are computed. The decay width in the nucleus is found to be practically the same as in free space. However, nuclear effects are of considerable importance ...