[en] The problem of possible electric charge conservation in the interaction between an electron, neutrino and a hypothetical neutral scalar meson chi⁰ is considered. The constants imposed by the fact that photon is practically massless are investigated. A conclusion is made that all longitudinal photons are emitted in one and the same space-time point. The ''coat'' of longitudinal photons which normally accompanies an electron is thrown off when the electric charge disappears. However, it is shown, that it is impossible to throw off the electron's ''coat'' of longitudinal photons instantaneously and that this gives rise to effective nullification of the effective coupling