Family Structure of Nucleons

Any of currents responsible for interactions of leptons and hadrons with virtual gauge bosons can symbolically be expressed in the form of a sum of vector and axial-vector parts of the same charge or dipole moment. This does not imply of course that the same neutron or proton must be simultaneously both a C-even and a C-odd nucleon. We have, thus, a full analogy to the fact that a classification of elementary particles with respect to C-operation admits the existence of the two types of Dirac fermions of the vector and axial-vector nature. If such objects are the neutrons and protons, they will constitute the nucleonic families of a different C-invariance. One group consists of C-even nucleons of vector currents. The second class includes the truly neutral C-odd nucleons of axial-vector currents. The family structure of both types of nucleons and leptons testifies that vector neutron and neutrino possess the same CP-odd electric charge. In contrast to this, truly neutral neutron and neutrino do not distinguish from one another by the availability in them of an equal CP-even electric charge.