Abstract

In recent years, very little that is new has happened in that branch of particle physics which investigates the structure of particles. In an earlier period, certain doubts had existed about the applicability of quantum electrodynamics at distances of the order of 10-14 cm. Experiments that are universally known, in which pairs of electrons and mu-mesons arose, contradicted the theory somewhat. Later, however, it became clear that all this was a consequence of certain methodological inaccuracies