抄録
In studying the interactions of mesotrons with nuclear particles the perturbation theory has been first applied without being earnestly doubted whether this process will give convergent results in these problems. In the quantum electrodynamics which deals with the interaction between electromagnetic field and electrons this process has given the results which agree very well with experimental evidences so that one can scarcely doubt the applicability of this process in this case. Still, there are several reasons for believing that the perturbation theory would not be applicable to the case of mesotron theory.
